/* ── VARIABLES ───────────────────────────────────────────────── */
:root {
  /* Dark theme — true black base, neutral greys for depth */
  --bg:          #000000;
  --bg2:         #070707;
  --bg3:         #0e0e0e;
  --surface:     #0a0a0a;
  --surface2:    #121212;
  --border:      #1f1f1f;
  --border2:     #303030;
  --accent:      #00e5b0;
  --accent-dim:  rgba(0,229,176,0.10);
  --accent2:     #8b5cf6;
  --accent2-dim: rgba(139,92,246,0.12);
  --text:        #f4f4f5;
  --text2:       #a1a1aa;
  --text3:       #6b6b76;
  --danger:      #ff4d6d;
  --danger-dim:  rgba(255,77,109,0.10);
  --success:     #00e5b0;
  --incoming:    #4c8dff;
  --incoming-dim: rgba(76,141,255,0.12);
  --outgoing:    #00e5b0;
  --outgoing-dim: rgba(0,229,176,0.12);

  --header-bg:   rgba(0,0,0,0.82);
  --nav-bg:      #000000;
  --subnav-bg:   #050505;
  --card-shadow: none;
  --backdrop:    rgba(0,0,0,0.72);

  --glow-accent: 0 0 18px rgba(0,229,176,0.35);
  --glow-soft:   0 0 8px  rgba(0,229,176,0.15);
  --glow-purple: 0 0 18px rgba(139,92,246,0.3);
  --glow-blue:   0 0 12px rgba(76,141,255,0.3);

  --font-mono:  'Share Tech Mono', monospace;
  --font-main:  'Rajdhani', sans-serif;
  --radius:     8px;
  --radius-lg:  14px;
  --transition: 0.2s ease;
  --ease-out:   cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-spring: cubic-bezier(0.2, 0.9, 0.3, 1.12);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.8), 0 1px 0 rgba(255,255,255,0.04) inset;

  /* Layout: content column width + side gutters (used so header/nav line up with content) */
  --page-max: 640px;
  --gutter-l: max(1rem, env(safe-area-inset-left),  calc((100% - var(--page-max)) / 2 + 1rem));
  --gutter-r: max(1rem, env(safe-area-inset-right), calc((100% - var(--page-max)) / 2 + 1rem));
}

[data-theme="light"] {
  --bg:          #f5f6f8;
  --bg2:         #eceef1;
  --bg3:         #e3e6ea;
  --surface:     #ffffff;
  --surface2:    #f9fafb;
  --border:      #e2e5e9;
  --border2:     #cdd2d8;
  --accent:      #0a7a5e;
  --accent-dim:  rgba(10,122,94,0.08);
  --accent2:     #6d28d9;
  --accent2-dim: rgba(109,40,217,0.08);
  --text:        #0c0e12;
  --text2:       #4b525c;
  --text3:       #6f7782;
  --danger:      #c0183a;
  --danger-dim:  rgba(192,24,58,0.08);
  --success:     #0a7a5e;
  --incoming:    #2563eb;
  --incoming-dim: rgba(37,99,235,0.08);
  --outgoing:    #0a7a5e;
  --outgoing-dim: rgba(10,122,94,0.08);

  --header-bg:   rgba(255,255,255,0.86);
  --nav-bg:      #ffffff;
  --subnav-bg:   #f9fafb;
  --card-shadow: 0 1px 2px rgba(16,24,40,0.05);
  --backdrop:    rgba(12,14,18,0.45);

  --glow-accent: 0 0 12px rgba(10,122,94,0.2);
  --glow-soft:   0 0 6px  rgba(10,122,94,0.1);
  --glow-purple: 0 0 12px rgba(109,40,217,0.15);
  --shadow-card: 0 4px 24px rgba(16,24,40,0.08), 0 1px 0 rgba(255,255,255,0.9) inset;
}

/* ── RESET ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-main);
  font-size: 15px;
  line-height: 1.6;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  transition: background 0.3s ease, color 0.3s ease;
}

.screen.hidden { display: none; }
.screen.active { display: block; }

button:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

/* ═══════════════════════════════════════════════════════════════
   LOGIN
═══════════════════════════════════════════════════════════════ */
.login-bg {
  position: fixed; inset: 0; z-index: 0; overflow: hidden;
}
.grid-lines {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0,229,176,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,176,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
}
[data-theme="light"] .grid-lines {
  background-image:
    linear-gradient(rgba(10,122,94,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10,122,94,0.06) 1px, transparent 1px);
}
.glow-orb {
  position: absolute; border-radius: 50%;
  filter: blur(90px); opacity: 0.12;
}
.orb1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, var(--accent2), transparent 70%);
  top: -150px; left: -150px;
  animation: float1 10s ease-in-out infinite;
}
.orb2 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, var(--accent), transparent 70%);
  bottom: -100px; right: -100px;
  animation: float2 13s ease-in-out infinite;
}
[data-theme="light"] .glow-orb { opacity: 0.07; }
@keyframes float1 {
  0%,100% { transform: translate(0,0) scale(1); }
  50%      { transform: translate(50px,40px) scale(1.05); }
}
@keyframes float2 {
  0%,100% { transform: translate(0,0) scale(1); }
  50%      { transform: translate(-40px,-30px) scale(1.08); }
}

.login-box {
  position: relative; z-index: 1;
  min-height: 100vh; min-height: 100dvh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: calc(2rem + env(safe-area-inset-top)) 1.5rem calc(2rem + env(safe-area-inset-bottom));
}
.login-logo {
  text-align: center; margin-bottom: 2.5rem;
  animation: fade-up 0.7s var(--ease-out) backwards;
}
.app-icon-large {
  width: 72px; height: 72px; border-radius: 50%;
  border: 1px solid var(--border2);
  box-shadow: var(--glow-soft);
  margin: 0 auto 1rem; display: block; object-fit: cover;
  animation: pulse-icon 4s ease-in-out infinite;
}
@keyframes pulse-icon {
  0%,100% { box-shadow: var(--glow-soft); }
  50%      { box-shadow: var(--glow-accent); }
}
.login-logo h1 {
  font-family: var(--font-mono); font-size: 2rem;
  letter-spacing: 0.35em; color: var(--accent);
  text-shadow: var(--glow-soft); margin-bottom: 0.3rem;
}
.login-sub {
  font-family: var(--font-mono); font-size: 0.65rem;
  color: var(--text3); letter-spacing: 0.25em;
}
.login-form {
  width: 100%; max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-card);
  animation: fade-up 0.7s 0.1s var(--ease-out) backwards;
}
.login-form > .field-group { animation: row-in 0.5s var(--ease-out) backwards; }
.login-form > .field-group:nth-child(1) { animation-delay: 0.25s; }
.login-form > .field-group:nth-child(2) { animation-delay: 0.33s; }
.login-form > .btn-primary { animation: row-in 0.5s 0.41s var(--ease-out) backwards; }

/* ═══════════════════════════════════════════════════════════════
   FIELDS
═══════════════════════════════════════════════════════════════ */
.field-group { margin-bottom: 1.25rem; position: relative; }
.field-group label {
  display: block; font-family: var(--font-mono);
  font-size: 0.6rem; letter-spacing: 0.22em;
  color: var(--accent); margin-bottom: 0.45rem; opacity: 0.85;
  transition: opacity var(--transition), letter-spacing 0.3s var(--ease-out);
}
.field-group:focus-within label { opacity: 1; letter-spacing: 0.26em; }
.label-hint { color: var(--text3); font-size: 0.58rem; letter-spacing: 0.05em; }

input, textarea {
  width: 100%; background: var(--bg2);
  border: 1px solid var(--border2); border-radius: var(--radius);
  color: var(--text); font-family: var(--font-main);
  font-size: 0.95rem; font-weight: 500;
  padding: 0.7rem 0.9rem; outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  -webkit-appearance: none;
}
[data-theme="light"] input,
[data-theme="light"] textarea { background: var(--surface); border-color: var(--border2); }
input:focus, textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim), var(--glow-soft); background: var(--bg3);
}
[data-theme="light"] input:focus,
[data-theme="light"] textarea:focus { background: var(--surface); }
textarea { resize: vertical; min-height: 130px; line-height: 1.6; }
input::placeholder, textarea::placeholder { color: var(--text3); font-weight: 400; }

.alias-input-wrap {
  display: flex; align-items: stretch;
  background: var(--bg2); border: 1px solid var(--border2);
  border-radius: var(--radius); overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
[data-theme="light"] .alias-input-wrap { background: var(--surface); border-color: var(--border2); }
.alias-input-wrap:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim), var(--glow-soft); }
.alias-input-wrap input {
  border: none; box-shadow: none; flex: 1; min-width: 0;
  border-radius: 0; padding-right: 0.3rem; background: transparent;
}
.alias-input-wrap input:focus { box-shadow: none; background: transparent; }
.domain-suffix {
  font-family: var(--font-mono); font-size: 0.7rem; color: var(--text3);
  padding: 0 0.75rem; white-space: nowrap;
  border-left: 1px solid var(--border); background: var(--bg3);
  display: flex; align-items: center;
}
[data-theme="light"] .domain-suffix { background: var(--bg2); border-color: var(--border2); }

.alias-dropdown {
  position: absolute; top: 100%; left: 0; right: 0;
  background: var(--surface2); border: 1px solid var(--border2);
  border-top: none; border-radius: 0 0 var(--radius) var(--radius);
  z-index: 100; overflow: hidden;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  animation: drop-in 0.2s var(--ease-out) backwards;
  transform-origin: top;
}
[data-theme="light"] .alias-dropdown { box-shadow: 0 8px 24px rgba(16,24,40,0.12); }
.alias-dropdown.hidden { display: none; }
.alias-option {
  padding: 0.55rem 0.9rem; font-family: var(--font-mono);
  font-size: 0.75rem; color: var(--text2); cursor: pointer;
  transition: background var(--transition), color var(--transition), padding-left var(--transition);
  border-bottom: 1px solid var(--border);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.alias-option:last-child { border-bottom: none; }
.alias-option:hover { background: var(--accent-dim); color: var(--accent); padding-left: 1.15rem; }

/* ═══════════════════════════════════════════════════════════════
   BUTTONS
═══════════════════════════════════════════════════════════════ */
.btn-primary {
  width: 100%; padding: 0.78rem;
  background: var(--accent-dim); border: 1px solid var(--accent);
  border-radius: var(--radius); color: var(--accent);
  font-family: var(--font-mono); font-size: 0.8rem;
  font-weight: 600; letter-spacing: 0.2em; cursor: pointer;
  transition: all var(--transition); box-shadow: var(--glow-soft);
  position: relative; overflow: hidden;
}
.btn-primary:hover {
  background: rgba(0,229,176,0.18); box-shadow: var(--glow-accent);
  transform: translateY(-1px);
}
[data-theme="light"] .btn-primary:hover { background: rgba(10,122,94,0.12); }
.btn-primary:active { transform: scale(0.98); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
/* sweeping highlight while a request is running */
.btn-primary.is-loading::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(100deg, transparent 20%, rgba(0,229,176,0.22) 50%, transparent 80%);
  transform: translateX(-100%);
  animation: sweep 1.1s ease-in-out infinite;
  pointer-events: none;
}
.btn-primary.flash { animation: btn-flash 0.7s ease-out; }

.btn-secondary {
  padding: 0.65rem 1.1rem;
  background: var(--accent2-dim); border: 1px solid var(--accent2);
  border-radius: var(--radius); color: var(--accent2);
  font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.1em; cursor: pointer; transition: all var(--transition);
}
.btn-secondary:hover {
  background: rgba(139,92,246,0.18); box-shadow: var(--glow-purple);
  transform: translateY(-1px);
}

.btn-ghost {
  padding: 0.65rem 1.1rem; background: transparent;
  border: 1px solid var(--border2); border-radius: var(--radius);
  color: var(--text2); font-family: var(--font-mono);
  font-size: 0.72rem; letter-spacing: 0.1em; cursor: pointer;
  transition: all var(--transition);
}
.btn-ghost:hover { border-color: var(--text2); color: var(--text); background: rgba(255,255,255,0.05); }
[data-theme="light"] .btn-ghost:hover { background: rgba(0,0,0,0.04); }

.btn-ghost-sm {
  padding: 0.38rem 0.8rem; background: transparent;
  border: 1px solid var(--border2); border-radius: var(--radius);
  color: var(--text3); font-family: var(--font-mono);
  font-size: 0.68rem; letter-spacing: 0.1em; cursor: pointer;
  transition: all var(--transition);
  display: inline-flex; align-items: center; gap: 0.3rem;
}
.btn-ghost-sm:hover { border-color: var(--accent); color: var(--accent); }
.refresh-icon { display: inline-block; }
.btn-ghost-sm.is-spinning { border-color: var(--accent); color: var(--accent); }
.btn-ghost-sm.is-spinning .refresh-icon { animation: spin 0.8s linear infinite; }

.btn-danger {
  padding: 0.65rem 1.1rem; background: var(--danger-dim);
  border: 1px solid var(--danger); border-radius: var(--radius);
  color: var(--danger); font-family: var(--font-mono);
  font-size: 0.72rem; letter-spacing: 0.1em; cursor: pointer;
  transition: all var(--transition);
}
.btn-danger:hover { background: rgba(255,77,109,0.18); transform: translateY(-1px); }

/* press feedback */
.btn-secondary:active, .btn-ghost:active, .btn-danger:active, .btn-ghost-sm:active,
.btn-attach:active, .subtab-btn:active, .tab-btn:active, .btn-logout:active,
.att-view-btn:active, .att-dl-btn:active, .modal-close:active { transform: scale(0.95); }

.btn-loader { display: inline-block; animation: spin 0.9s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes sweep { to { transform: translateX(100%); } }
@keyframes btn-flash {
  0%   { box-shadow: 0 0 0 0 rgba(0,229,176,0.55); }
  100% { box-shadow: 0 0 0 20px rgba(0,229,176,0); }
}
.hidden { display: none !important; }

/* ═══════════════════════════════════════════════════════════════
   APP HEADER
═══════════════════════════════════════════════════════════════ */
#app-screen { display: flex; flex-direction: column; min-height: 100vh; min-height: 100dvh; }
#app-screen:not(.hidden) { animation: fade-in 0.45s ease backwards; }

.app-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: calc(0.6rem + env(safe-area-inset-top)) var(--gutter-r) 0.6rem var(--gutter-l);
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50;
  animation: header-in 0.5s var(--ease-out) backwards;
}
@keyframes header-in {
  from { transform: translateY(-100%); opacity: 0; }
  to   { transform: none; opacity: 1; }
}

.header-logo { display: flex; align-items: center; gap: 0.6rem; min-width: 0; }
.app-icon-small {
  width: 28px; height: 28px; border-radius: 50%;
  border: 1px solid var(--border2); object-fit: cover; flex-shrink: 0;
}
.header-title {
  font-family: var(--font-mono); font-size: 0.95rem;
  letter-spacing: 0.22em; color: var(--accent);
}

.header-actions {
  display: flex; align-items: center; gap: 0.75rem; flex-shrink: 0;
}

/* ── THEME TOGGLE SWITCH ─────────────────────────────────────── */
.theme-toggle {
  position: relative; display: inline-block;
  width: 56px; height: 28px; cursor: pointer;
  flex-shrink: 0;
}
.theme-toggle input { opacity: 0; width: 0; height: 0; position: absolute; }
.theme-toggle input:focus-visible ~ .theme-track { outline: 2px solid var(--accent); outline-offset: 2px; }
.theme-track {
  position: absolute; inset: 0;
  background: #121212;
  border: 1px solid var(--border2);
  border-radius: 28px;
  transition: background 0.3s ease, border-color 0.3s ease;
  display: flex; align-items: center;
}
.theme-toggle input:checked ~ .theme-track {
  background: #e6f4ef; border-color: #0a7a5e;
}
.theme-thumb {
  position: absolute; left: 2px; top: 50%;
  transform: translateY(-50%);
  width: 22px; height: 22px; border-radius: 50%;
  background: #262626; border: 1px solid var(--border2);
  transition: transform 0.35s var(--ease-spring),
              background 0.3s ease, border-color 0.3s ease;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 1px 4px rgba(0,0,0,0.4); overflow: hidden;
}
.theme-toggle input:checked ~ .theme-track .theme-thumb {
  transform: translate(28px, -50%);
  background: #ffffff; border-color: #0a7a5e;
  box-shadow: 0 0 6px rgba(10,122,94,0.35);
}
.icon-moon {
  font-size: 13px; line-height: 1; color: var(--accent);
  position: absolute; opacity: 1; transform: rotate(0) scale(1);
  transition: opacity 0.25s ease, transform 0.4s var(--ease-spring);
}
.icon-sun {
  font-size: 13px; line-height: 1; color: #f59e0b;
  position: absolute; opacity: 0; transform: rotate(-90deg) scale(0.4);
  transition: opacity 0.25s ease, transform 0.4s var(--ease-spring);
}
.theme-toggle input:checked ~ .theme-track .icon-moon { opacity: 0; transform: rotate(90deg) scale(0.4); }
.theme-toggle input:checked ~ .theme-track .icon-sun  { opacity: 1; transform: rotate(0) scale(1); }

/* ── LOGOUT BUTTON ───────────────────────────────────────────── */
.btn-logout {
  background: transparent; border: 1px solid var(--border2);
  border-radius: var(--radius); color: var(--text3);
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; padding: 0; transition: all var(--transition);
}
.btn-logout:hover {
  border-color: var(--danger); color: var(--danger);
  background: var(--danger-dim);
}
.btn-logout svg { display: block; transition: transform 0.25s var(--ease-out); }
.btn-logout:hover svg { transform: translateX(2px); }

/* ── MAIN TABS ───────────────────────────────────────────────── */
.tab-nav {
  display: flex; background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  padding: 0 var(--gutter-r) 0 var(--gutter-l);
}
.tab-btn {
  flex: 1; padding: 0.7rem; background: none;
  border: none; border-bottom: 2px solid transparent;
  color: var(--text3); font-family: var(--font-mono);
  font-size: 0.72rem; letter-spacing: 0.14em; cursor: pointer;
  transition: color var(--transition), transform var(--transition);
  display: flex; align-items: center; justify-content: center; gap: 0.4rem;
  position: relative;
}
/* underline grows out from the centre when a tab becomes active */
.tab-btn::after {
  content: ''; position: absolute; left: 50%; bottom: -2px;
  height: 2px; width: 0; border-radius: 2px;
  background: var(--accent); box-shadow: 0 0 10px var(--accent);
  transform: translateX(-50%);
  transition: width 0.35s var(--ease-out);
}
.tab-btn.active { color: var(--accent); }
.tab-btn.active::after { width: 100%; }
.tab-btn:hover:not(.active) { color: var(--text2); }
.tab-icon { font-size: 0.95rem; display: inline-block; }
.tab-btn.active .tab-icon { animation: icon-pop 0.45s var(--ease-spring); }

.tab-content { display: none; flex: 1; }
.tab-content.active { display: block; animation: tab-in 0.4s var(--ease-out) backwards; }
.tab-content.active[data-dir="right"] { animation-name: tab-in-right; }
.tab-content.active[data-dir="left"]  { animation-name: tab-in-left; }

/* ── SUB-TABS (Inbox / Sent) ─────────────────────────────────── */
.subtab-nav {
  display: flex; align-items: center;
  padding: 0.55rem var(--gutter-r) 0.55rem var(--gutter-l); gap: 0.4rem;
  background: var(--subnav-bg); border-bottom: 1px solid var(--border);
}
.subtab-spacer { flex: 1; }

.subtab-btn {
  display: flex; align-items: center; gap: 0.45rem;
  padding: 0.38rem 0.85rem;
  background: transparent; border: 1px solid var(--border2);
  border-radius: 20px; cursor: pointer;
  font-family: var(--font-mono); font-size: 0.68rem;
  letter-spacing: 0.12em; color: var(--text3);
  transition: all var(--transition);
}
.subtab-btn.active { animation: pill-pop 0.4s var(--ease-spring); }
.subtab-btn.active.inbox-active,
.subtab-btn[data-subtab="inbox"].active {
  border-color: var(--incoming); color: var(--incoming);
  background: var(--incoming-dim); box-shadow: 0 0 8px rgba(76,141,255,0.2);
}
.subtab-btn[data-subtab="sent"].active {
  border-color: var(--outgoing); color: var(--outgoing);
  background: var(--outgoing-dim); box-shadow: var(--glow-soft);
}
.subtab-btn:hover:not(.active) { border-color: var(--text2); color: var(--text2); }

/* Direction indicator dots on subtab */
.subtab-indicator {
  width: 6px; height: 6px; border-radius: 50%;
  display: inline-block; flex-shrink: 0;
}
.subtab-indicator.incoming { background: var(--incoming); color: var(--incoming); }
.subtab-indicator.outgoing { background: var(--outgoing); color: var(--outgoing); }
.subtab-btn.active .subtab-indicator { animation: dot-pulse 2s ease-out infinite; }

.subtab-content { display: none; }
.subtab-content.active { display: block; animation: tab-in 0.38s var(--ease-out) backwards; }
.subtab-content.active[data-dir="right"] { animation-name: tab-in-right; }
.subtab-content.active[data-dir="left"]  { animation-name: tab-in-left; }

/* ── SELECTION TOOLBAR ───────────────────────────────────────── */
.selection-toolbar {
  padding: 0.5rem var(--gutter-r) 0.5rem var(--gutter-l);
  background: var(--surface2); border-bottom: 1px solid var(--border2);
  display: flex; align-items: center; gap: 0.6rem;
}
.selection-toolbar:not(.hidden) { animation: drop-in 0.25s var(--ease-out) backwards; }
.selection-count {
  font-family: var(--font-mono); font-size: 0.72rem;
  color: var(--text2); flex: 1;
}

/* ═══════════════════════════════════════════════════════════════
   COMPOSE
═══════════════════════════════════════════════════════════════ */
.compose-form {
  padding: 1.2rem 1rem 2rem;
  max-width: var(--page-max); margin: 0 auto;
}
.compose-form.sent-pulse { animation: form-sent 0.65s var(--ease-out); }
.tab-content.active .compose-form > .field-group { animation: row-in 0.5s var(--ease-out) backwards; }
.compose-form > .field-group:nth-child(1) { animation-delay: 0.04s !important; }
.compose-form > .field-group:nth-child(2) { animation-delay: 0.10s !important; }
.compose-form > .field-group:nth-child(3) { animation-delay: 0.16s !important; }
.compose-form > .field-group:nth-child(4) { animation-delay: 0.22s !important; }
.compose-form > .field-group:nth-child(5) { animation-delay: 0.28s !important; }
.compose-actions {
  display: flex; gap: 0.6rem;
  margin-top: 1.2rem; flex-wrap: wrap;
}
.compose-actions .btn-primary { width: auto; flex: 1; min-width: 80px; }

.attachment-zone {
  border: 1px dashed var(--border2); border-radius: var(--radius);
  padding: 0.85rem; transition: border-color var(--transition), background var(--transition);
}
.attachment-zone:hover { border-color: var(--accent); background: var(--accent-dim); }
.btn-attach {
  background: none; border: 1px solid var(--border2);
  border-radius: var(--radius); color: var(--text2);
  font-family: var(--font-mono); font-size: 0.72rem;
  padding: 0.42rem 0.8rem; cursor: pointer;
  letter-spacing: 0.1em; transition: all var(--transition);
}
.btn-attach:hover { border-color: var(--accent); color: var(--accent); }
.file-list { margin-top: 0.6rem; display: flex; flex-direction: column; gap: 0.4rem; }
.file-list:empty { margin-top: 0; }
.file-item {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0.42rem 0.7rem;
  font-family: var(--font-mono); font-size: 0.7rem; color: var(--text2);
}
[data-theme="light"] .file-item { background: var(--bg2); }
.file-item.file-enter { animation: file-in 0.35s var(--ease-spring) backwards; }
.file-item.file-leave { animation: file-out 0.2s ease forwards; pointer-events: none; }
.file-item-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.file-item-size { color: var(--text3); margin: 0 0.5rem; font-size: 0.65rem; flex-shrink: 0; }
.file-remove {
  background: none; border: none; color: var(--danger);
  cursor: pointer; font-size: 0.8rem; padding: 0.2rem; line-height: 1;
  opacity: 0.5; transition: opacity var(--transition), transform var(--transition);
}
.file-remove:hover { opacity: 1; transform: scale(1.2) rotate(90deg); }

/* ── MESSAGES ────────────────────────────────────────────────── */
.error-msg {
  margin-top: 0.8rem; padding: 0.6rem 0.9rem;
  background: var(--danger-dim); border: 1px solid rgba(255,77,109,0.3);
  border-radius: var(--radius); color: var(--danger);
  font-family: var(--font-mono); font-size: 0.73rem;
  word-break: break-word;
}
.error-msg:not(.hidden) { animation: msg-shake 0.5s ease; }
.success-msg {
  margin-top: 0.8rem; padding: 0.6rem 0.9rem;
  background: rgba(0,229,176,0.07); border: 1px solid rgba(0,229,176,0.25);
  border-radius: var(--radius); color: var(--success);
  font-family: var(--font-mono); font-size: 0.73rem;
}
.success-msg:not(.hidden) { animation: msg-in 0.45s var(--ease-spring) backwards; }
[data-theme="light"] .success-msg {
  background: rgba(10,122,94,0.07); border-color: rgba(10,122,94,0.25);
}

/* ═══════════════════════════════════════════════════════════════
   HISTORY LIST
═══════════════════════════════════════════════════════════════ */
.history-list {
  padding: 0.8rem 1rem;
  display: flex; flex-direction: column; gap: 0.55rem;
  max-width: var(--page-max); margin: 0 auto; width: 100%;
}
.history-empty {
  text-align: center; color: var(--text2);
  font-family: var(--font-mono); font-size: 0.78rem;
  padding: 3.5rem 0; letter-spacing: 0.1em;
  animation: fade-in 0.4s ease backwards;
}

/* loading skeleton cards */
.history-skeleton {
  height: 66px; border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(100deg, var(--surface) 30%, var(--border) 50%, var(--surface) 70%);
  background-size: 200% 100%;
  animation: shimmer 1.4s linear infinite;
}
.history-skeleton:nth-child(2) { animation-delay: 0.12s; opacity: 0.85; }
.history-skeleton:nth-child(3) { animation-delay: 0.24s; opacity: 0.7; }
.history-skeleton:nth-child(4) { animation-delay: 0.36s; opacity: 0.55; }

.history-item {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0.85rem 1rem;
  cursor: pointer; transition: all var(--transition);
  position: relative; overflow: hidden;
  box-shadow: var(--card-shadow);
}
.history-item::after {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  opacity: 0; transition: opacity var(--transition);
}
/* incoming = blue left border, outgoing = accent green */
.history-item[data-mail-type="inbox"]::after {
  background: linear-gradient(to bottom, var(--incoming), #6366f1);
}
.history-item[data-mail-type="sent"]::after {
  background: linear-gradient(to bottom, var(--accent), var(--accent2));
}
.history-item:hover { border-color: var(--border2); background: var(--surface2); transform: translateX(2px); }
.history-item:hover::after { opacity: 1; }
.history-item:active { transform: scale(0.985); }
.history-item.selected {
  border-color: var(--accent);
  background: var(--accent-dim);
}
/* entrance (only on fresh load) — staggered by --i */
.history-item.item-enter {
  animation: item-in 0.5s var(--ease-out) backwards;
  animation-delay: calc(var(--i, 0) * 55ms);
}
/* exit after delete */
.history-item.item-leave { animation: item-out 0.32s ease forwards; pointer-events: none; }

.history-item-top {
  display: flex; align-items: center; gap: 0.55rem;
  margin-bottom: 0.38rem;
}
.history-item-subject {
  font-family: var(--font-main); font-weight: 600;
  font-size: 0.95rem; color: var(--text);
  flex: 1; min-width: 0;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.history-item-meta {
  display: flex; gap: 0.7rem; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 0.63rem; color: var(--text3);
}
.meta-from {
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 160px;
}
.meta-date { margin-left: auto; }

/* Mail type badge IN / OUT */
.mail-type-badge {
  font-family: var(--font-mono); font-size: 0.55rem;
  font-weight: 700; letter-spacing: 0.12em;
  padding: 0.18rem 0.42rem;
  border-radius: 4px; flex-shrink: 0;
  border: 1px solid;
}
.mail-type-badge.inbox {
  color: var(--incoming); border-color: var(--incoming);
  background: var(--incoming-dim);
}
.mail-type-badge.sent {
  color: var(--outgoing); border-color: var(--outgoing);
  background: var(--outgoing-dim);
}

/* Attachment dot badge on list item */
.mail-attach-badge {
  font-size: 0.85rem; color: var(--text3); flex-shrink: 0;
  transition: color var(--transition);
}
.history-item:hover .mail-attach-badge { color: var(--accent); }

/* Checkbox */
.mail-checkbox {
  font-size: 1.1rem; margin-right: 0.35rem;
  color: var(--accent); user-select: none; flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════
   MODAL
═══════════════════════════════════════════════════════════════ */
.modal {
  position: fixed; inset: 0;
  background: var(--backdrop);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: 1rem; animation: fade-in 0.22s ease backwards;
}
.modal.hidden { display: none; }
.modal.closing { animation: fade-out 0.2s ease forwards; pointer-events: none; }
.modal-box {
  background: var(--surface); border: 1px solid var(--border2);
  border-radius: var(--radius-lg);
  width: 100%; max-width: 500px; max-height: 85vh; max-height: 85dvh;
  display: flex; flex-direction: column;
  box-shadow: 0 24px 60px rgba(0,0,0,0.7);
  animation: modal-in 0.36s var(--ease-spring) backwards;
}
.modal.closing .modal-box { animation: modal-out 0.2s ease forwards; }
[data-theme="light"] .modal-box { box-shadow: 0 16px 48px rgba(16,24,40,0.18); }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.25rem; border-bottom: 1px solid var(--border);
  font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.18em; color: var(--accent);
}
.modal-close {
  background: none; border: none; color: var(--text3);
  font-size: 0.95rem; cursor: pointer;
  transition: color var(--transition), transform 0.25s var(--ease-out); padding: 0.2rem;
}
.modal-close:hover { color: var(--text); transform: rotate(90deg); }
.modal-body { padding: 1.2rem 1.25rem; overflow-y: auto; flex: 1; min-height: 0; }
.modal-footer {
  padding: 0.9rem 1.25rem; border-top: 1px solid var(--border);
  display: flex; gap: 0.6rem; justify-content: flex-end;
}

/* content of a modal fades up row by row */
.modal-body > * { animation: row-in 0.42s var(--ease-out) backwards; }
.modal-body > :nth-child(1) { animation-delay: 0.10s; }
.modal-body > :nth-child(2) { animation-delay: 0.15s; }
.modal-body > :nth-child(3) { animation-delay: 0.20s; }
.modal-body > :nth-child(4) { animation-delay: 0.25s; }
.modal-body > :nth-child(5) { animation-delay: 0.30s; }
.modal-body > :nth-child(6) { animation-delay: 0.35s; }
.modal-body > :nth-child(7) { animation-delay: 0.40s; }
.modal-body > :nth-child(n+8) { animation-delay: 0.45s; }

/* Detail type badge in modal header */
.detail-type-badge {
  font-family: var(--font-mono); font-size: 0.58rem;
  font-weight: 700; letter-spacing: 0.1em;
  padding: 0.15rem 0.5rem; border-radius: 4px;
  border: 1px solid; margin-right: 0.4rem;
  vertical-align: middle;
}
.detail-type-badge.incoming {
  color: var(--incoming); border-color: var(--incoming); background: var(--incoming-dim);
}
.detail-type-badge.outgoing {
  color: var(--outgoing); border-color: var(--outgoing); background: var(--outgoing-dim);
}

.preview-row { display: flex; gap: 0.8rem; margin-bottom: 0.65rem; font-size: 0.9rem; align-items: baseline; }
.preview-row > span:last-child { min-width: 0; overflow-wrap: anywhere; }
.preview-label {
  font-family: var(--font-mono); font-size: 0.6rem;
  letter-spacing: 0.15em; color: var(--accent);
  min-width: 70px; padding-top: 0.18rem; opacity: 0.8; flex-shrink: 0;
}
.preview-divider { border: none; border-top: 1px solid var(--border); margin: 0.9rem 0; }
.preview-body {
  font-size: 0.9rem; color: var(--text2);
  white-space: pre-wrap; word-break: break-word; line-height: 1.7;
}
.preview-attachments {
  margin-top: 0.8rem; font-family: var(--font-mono);
  font-size: 0.7rem; color: var(--text3); overflow-wrap: anywhere;
}

.detail-row { display: flex; gap: 0.8rem; margin-bottom: 0.7rem; font-size: 0.9rem; align-items: baseline; }
.detail-row > span:last-child { min-width: 0; overflow-wrap: anywhere; }
.detail-label {
  font-family: var(--font-mono); font-size: 0.6rem;
  letter-spacing: 0.14em; color: var(--accent);
  min-width: 70px; padding-top: 0.18rem; opacity: 0.8; flex-shrink: 0;
}
.detail-body {
  margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border);
  font-size: 0.9rem; color: var(--text2);
  white-space: pre-wrap; word-break: break-word; line-height: 1.7;
}
.detail-body-html {
  white-space: normal; overflow-x: auto;
}
/* keep wide HTML mails inside the screen */
.detail-body-html img, .detail-body-html video, .detail-body-html iframe {
  max-width: 100%; height: auto;
}
.detail-body-html table { max-width: 100%; }
.detail-body-html pre { overflow-x: auto; max-width: 100%; }
/* Links inside both plain-text and HTML mail bodies */
.detail-body a,
.detail-body-html a {
  color: var(--accent); text-decoration: underline;
  word-break: break-all; cursor: pointer;
}

/* ── ATTACHMENT LIST IN DETAIL ───────────────────────────────── */
.detail-attachments {
  display: flex; flex-direction: column; gap: 0.5rem; flex: 1; min-width: 0;
}
/* att-item styles moved to bottom */
.att-view-btn, .att-dl-btn {
  font-family: var(--font-mono); font-size: 0.6rem;
  letter-spacing: 0.1em; padding: 0.22rem 0.55rem;
  border-radius: 4px; cursor: pointer; border: 1px solid;
  transition: all var(--transition);
}
.att-view-btn {
  color: var(--accent); border-color: var(--accent);
  background: var(--accent-dim);
}
.att-view-btn:hover { background: rgba(0,229,176,0.22); }
.att-dl-btn {
  color: var(--text3); border-color: var(--border2);
  background: transparent;
}
.att-dl-btn:hover { color: var(--accent2); border-color: var(--accent2); }
.att-size {
  font-family: var(--font-mono); font-size: 0.6rem;
  color: var(--text3); margin-top: 0.18rem; display: block;
}

/* ── DANGER SMALL ────────────────────────────────────────────── */
.btn-danger-sm {
  background: var(--danger-dim); border: 1px solid var(--danger);
  color: var(--danger); border-radius: var(--radius);
  font-family: var(--font-mono); font-size: 0.68rem;
  padding: 0.3rem 0.7rem; cursor: pointer;
  letter-spacing: 0.08em; transition: all var(--transition);
}
.btn-danger-sm:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-danger-sm:not(:disabled):hover { background: var(--danger); color: #fff; }
.btn-danger-sm:not(:disabled):active { transform: scale(0.95); }

/* ═══════════════════════════════════════════════════════════════
   ATTACHMENT VIEWER MODAL
═══════════════════════════════════════════════════════════════ */
.modal-box-viewer {
  max-width: 95vw;
  width: 95vw;
  max-height: 92vh; max-height: 92dvh;
}
.viewer-body {
  display: flex; align-items: center; justify-content: center;
  background: var(--bg); overflow: auto;
  min-height: 200px;
}
.viewer-img {
  max-width: 100%; max-height: 70vh;
  object-fit: contain; border-radius: var(--radius);
}
.viewer-body > .viewer-img { animation: zoom-in 0.45s var(--ease-out) backwards; }
.viewer-media {
  max-width: 100%; width: 100%;
  border-radius: var(--radius); outline: none;
}
.viewer-frame {
  width: 100%; height: 65vh;
  border: none; background: #fff;
  border-radius: var(--radius);
}
.viewer-text {
  width: 100%; padding: 1rem;
  font-family: var(--font-mono); font-size: 0.8rem;
  color: var(--text2); white-space: pre-wrap;
  word-break: break-all; line-height: 1.6;
  background: var(--bg2); border-radius: var(--radius);
  max-height: 65vh; overflow-y: auto;
}
.viewer-error {
  text-align: center; color: var(--text3);
  font-family: var(--font-mono); font-size: 0.8rem;
  padding: 2rem; line-height: 2;
}

/* ── SCROLLBAR ───────────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ═══════════════════════════════════════════════════════════════
   CUSTOM CONFIRM DIALOG
═══════════════════════════════════════════════════════════════ */
.custom-confirm-overlay {
  position: fixed; inset: 0; z-index: 999;
  background: var(--backdrop);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  padding: 1.5rem;
  opacity: 0; transition: opacity 0.2s ease;
}
.custom-confirm-overlay.visible { opacity: 1; }

.custom-confirm-box {
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem 1.5rem;
  max-width: 320px; width: 100%;
  text-align: center;
  box-shadow: 0 24px 60px rgba(0,0,0,0.7), 0 0 0 1px rgba(255,255,255,0.03) inset;
  transform: translateY(14px) scale(0.95);
  transition: transform 0.3s var(--ease-spring);
}
.custom-confirm-overlay.visible .custom-confirm-box { transform: none; }

[data-theme="light"] .custom-confirm-box {
  box-shadow: 0 16px 48px rgba(16,24,40,0.18);
}

.custom-confirm-icon {
  font-size: 2rem; margin-bottom: 0.75rem;
  color: var(--danger);
  text-shadow: 0 0 16px rgba(255,77,109,0.5);
  display: inline-block;
}
.custom-confirm-overlay.visible .custom-confirm-icon { animation: icon-pop 0.5s 0.1s var(--ease-spring) backwards; }
.custom-confirm-title {
  font-family: var(--font-mono);
  font-size: 0.85rem; letter-spacing: 0.1em;
  color: var(--text); font-weight: 600;
  margin-bottom: 0.4rem;
}
.custom-confirm-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem; color: var(--text3);
  letter-spacing: 0.06em; margin-bottom: 1.5rem;
}
.custom-confirm-btns {
  display: flex; gap: 0.65rem; justify-content: center;
}

/* ═══════════════════════════════════════════════════════════════
   TOAST NOTIFICATION
═══════════════════════════════════════════════════════════════ */
.gm-toast {
  position: fixed; bottom: calc(1.5rem + env(safe-area-inset-bottom)); left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 0.65rem 1.1rem;
  font-family: var(--font-mono); font-size: 0.72rem;
  color: var(--text2); letter-spacing: 0.05em;
  z-index: 1000;
  max-width: min(88vw, 480px); text-align: center;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  opacity: 0; transition: opacity 0.3s ease, transform 0.35s var(--ease-spring);
  pointer-events: none;
}
.gm-toast.visible {
  opacity: 1; transform: translateX(-50%) translateY(0);
}
.gm-toast-error {
  border-color: var(--danger);
  color: var(--danger);
  background: var(--danger-dim);
}
.gm-toast-success {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ═══════════════════════════════════════════════════════════════
   MAIL SENT — paper plane fly-away
═══════════════════════════════════════════════════════════════ */
.sent-fx {
  position: fixed; inset: 0; z-index: 1200; pointer-events: none;
  display: flex; align-items: center; justify-content: center;
}
.sent-ring {
  position: absolute; width: 90px; height: 90px; border-radius: 50%;
  border: 2px solid var(--accent); box-shadow: var(--glow-accent);
  opacity: 0; animation: sent-ring 0.95s 0.12s ease-out forwards;
}
.sent-plane {
  width: 58px; height: 58px; color: var(--accent);
  filter: drop-shadow(0 0 12px rgba(0,229,176,0.55));
  animation: sent-fly 1.15s cubic-bezier(0.5, 0, 0.2, 1) forwards;
}

/* ═══════════════════════════════════════════════════════════════
   ATTACHMENT ITEM — fixed layout so VIEW+DL always visible
═══════════════════════════════════════════════════════════════ */
.att-item {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0.5rem 0.7rem;
  overflow: hidden;
}
[data-theme="light"] .att-item { background: var(--bg2); }

.att-name-row {
  display: flex; align-items: center;
  gap: 0.5rem; flex-wrap: nowrap; width: 100%; min-width: 0;
}
.att-name {
  font-family: var(--font-mono); font-size: 0.68rem; color: var(--text2);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  flex: 1; min-width: 0;
}
.att-btns {
  display: flex; gap: 0.3rem; flex-shrink: 0;
}
.att-view-btn, .att-dl-btn {
  font-family: var(--font-mono); font-size: 0.58rem;
  letter-spacing: 0.08em; padding: 0.2rem 0.45rem;
  border-radius: 4px; cursor: pointer; border: 1px solid;
  transition: all var(--transition); white-space: nowrap;
}
.att-view-btn {
  color: var(--accent); border-color: var(--accent);
  background: var(--accent-dim);
}
.att-view-btn:hover { background: rgba(0,229,176,0.22); }
.att-dl-btn {
  color: var(--text3); border-color: var(--border2);
  background: transparent;
}
.att-dl-btn:hover { color: var(--accent2); border-color: var(--accent2); }

/* ═══════════════════════════════════════════════════════════════
   KEYFRAMES
═══════════════════════════════════════════════════════════════ */
@keyframes fade-in  { from { opacity: 0; } to { opacity: 1; } }
@keyframes fade-out { from { opacity: 1; } to { opacity: 0; } }
@keyframes fade-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}
@keyframes row-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}
@keyframes drop-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: none; }
}
@keyframes zoom-in {
  from { opacity: 0; transform: scale(0.94); }
  to   { opacity: 1; transform: none; }
}
@keyframes tab-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}
@keyframes tab-in-right {
  from { opacity: 0; transform: translateX(28px); }
  to   { opacity: 1; transform: none; }
}
@keyframes tab-in-left {
  from { opacity: 0; transform: translateX(-28px); }
  to   { opacity: 1; transform: none; }
}
@keyframes modal-in {
  from { opacity: 0; transform: translateY(20px) scale(0.95); }
  to   { opacity: 1; transform: none; }
}
@keyframes modal-out {
  from { opacity: 1; transform: none; }
  to   { opacity: 0; transform: translateY(12px) scale(0.97); }
}
@keyframes sheet-in  { from { transform: translateY(100%); } to { transform: none; } }
@keyframes sheet-out { from { transform: none; } to { transform: translateY(100%); } }
@keyframes item-in {
  from { opacity: 0; transform: translateY(14px) scale(0.98); }
  to   { opacity: 1; transform: none; }
}
@keyframes item-out {
  from { opacity: 1; transform: none; max-height: 140px; }
  to   {
    opacity: 0; transform: translateX(48px) scale(0.96); max-height: 0;
    padding-top: 0; padding-bottom: 0; border-width: 0;
    margin-top: -0.275rem; margin-bottom: -0.275rem;
  }
}
@keyframes file-in {
  from { opacity: 0; transform: translateX(-14px) scale(0.97); }
  to   { opacity: 1; transform: none; }
}
@keyframes file-out {
  to { opacity: 0; transform: translateX(18px) scale(0.96); }
}
@keyframes msg-in {
  from { opacity: 0; transform: translateY(-8px) scale(0.97); }
  to   { opacity: 1; transform: none; }
}
@keyframes msg-shake {
  0%   { opacity: 0; transform: translateX(0); }
  15%  { opacity: 1; transform: translateX(-6px); }
  30%  { transform: translateX(5px); }
  45%  { transform: translateX(-4px); }
  60%  { transform: translateX(3px); }
  75%  { transform: translateX(-2px); }
  100% { opacity: 1; transform: none; }
}
@keyframes icon-pop {
  0%   { transform: scale(0.4); opacity: 0; }
  60%  { transform: scale(1.25); opacity: 1; }
  100% { transform: scale(1); }
}
@keyframes pill-pop {
  0%   { transform: scale(0.92); }
  60%  { transform: scale(1.05); }
  100% { transform: scale(1); }
}
@keyframes dot-pulse {
  0%   { box-shadow: 0 0 0 0 currentColor; }
  70%  { box-shadow: 0 0 0 6px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}
@keyframes shimmer {
  from { background-position: 200% 0; }
  to   { background-position: -200% 0; }
}
@keyframes form-sent {
  0%   { transform: none; opacity: 1; }
  30%  { transform: translateY(-10px) scale(0.985); opacity: 0.35; }
  100% { transform: none; opacity: 1; }
}
@keyframes sent-fly {
  0%   { transform: translate(-30px, 40px) rotate(0) scale(0.5); opacity: 0; }
  25%  { transform: translate(0, 0) rotate(-6deg) scale(1.12); opacity: 1; }
  45%  { transform: translate(0, 0) rotate(-6deg) scale(1); opacity: 1; }
  100% { transform: translate(55vw, -60vh) rotate(-14deg) scale(0.6); opacity: 0; }
}
@keyframes sent-ring {
  0%   { transform: scale(0.4); opacity: 0.9; }
  100% { transform: scale(3.4); opacity: 0; }
}

/* smooth colour change when switching dark ↔ light */
.theme-anim *, .theme-anim *::before, .theme-anim *::after {
  transition: background-color 0.4s ease, border-color 0.4s ease, color 0.4s ease,
              box-shadow 0.4s ease, fill 0.4s ease, stroke 0.4s ease, opacity 0.3s ease !important;
}
.theme-anim .theme-thumb {
  transition: transform 0.35s var(--ease-spring), background-color 0.4s ease, border-color 0.4s ease !important;
}
.theme-anim .icon-moon, .theme-anim .icon-sun {
  transition: opacity 0.25s ease, transform 0.4s var(--ease-spring) !important;
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════════════ */

/* ── Touch devices: no sticky hover-lift, bigger tap targets, no iOS zoom ── */
@media (hover: none) {
  .btn-primary:hover, .btn-secondary:hover, .btn-danger:hover { transform: none; }
  .history-item:hover { transform: none; }
  .alias-option:hover { padding-left: 0.9rem; }
}
@media (pointer: coarse) {
  .btn-ghost-sm, .btn-danger-sm, .btn-attach { min-height: 38px; }
  .subtab-btn { min-height: 38px; }
  .tab-btn { min-height: 46px; }
  .btn-logout { width: 40px; height: 40px; }
  .theme-toggle { width: 60px; height: 32px; }
  .theme-thumb { width: 26px; height: 26px; }
  .theme-toggle input:checked ~ .theme-track .theme-thumb { transform: translate(28px, -50%); }
  .modal-close { padding: 0.55rem 0.7rem; margin: -0.35rem -0.5rem -0.35rem 0; font-size: 1.05rem; }
  .file-remove { padding: 0.5rem 0.55rem; margin: -0.3rem -0.4rem -0.3rem 0; }
  .att-view-btn, .att-dl-btn { padding: 0.4rem 0.7rem; min-height: 32px; }
  .alias-option { padding: 0.8rem 0.9rem; }
}
@media (max-width: 768px) {
  input, textarea { font-size: 16px; } /* stops iOS zooming into fields */
}

/* ── Small phones ── */
@media (max-width: 380px) {
  .login-logo h1 { font-size: 1.6rem; letter-spacing: 0.25em; }
  .login-form { padding: 1.5rem 1.15rem; }
  .header-title { letter-spacing: 0.14em; font-size: 0.88rem; }
  .header-actions { gap: 0.5rem; }
  .tab-btn { letter-spacing: 0.08em; padding: 0.7rem 0.4rem; }
  .subtab-nav { flex-wrap: wrap; row-gap: 0.4rem; }
  .subtab-btn { padding: 0.35rem 0.65rem; letter-spacing: 0.06em; }
  .selection-toolbar { flex-wrap: wrap; }
  .domain-suffix { font-size: 0.62rem; padding: 0 0.5rem; }
  .compose-form { padding-left: 0.85rem; padding-right: 0.85rem; }
  .history-list { padding-left: 0.85rem; padding-right: 0.85rem; }
}

/* ── Phones: modals become bottom sheets ── */
@media (max-width: 560px) {
  .modal { align-items: flex-end; padding: 0; }
  .modal-box, .modal-box-viewer {
    max-width: 100%; width: 100%;
    max-height: 92vh; max-height: 92dvh;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    border-bottom: none;
    animation-name: sheet-in; animation-duration: 0.38s;
  }
  .modal.closing .modal-box { animation-name: sheet-out; animation-duration: 0.22s; }
  .modal-footer { padding-bottom: calc(0.9rem + env(safe-area-inset-bottom)); }
  .modal-box::before {          /* little grab handle */
    content: ''; display: block; flex-shrink: 0;
    width: 38px; height: 4px; border-radius: 4px;
    background: var(--border2); margin: 0.5rem auto 0;
  }
  .viewer-frame { height: 60vh; height: 60dvh; }
  .viewer-img { max-height: 62vh; max-height: 62dvh; }
}

/* ── Tablets / small laptops ── */
@media (min-width: 600px) {
  .meta-from { max-width: 240px; }
  .modal-box { max-width: 560px; }
  .login-form { max-width: 420px; }
}

/* ── Desktop ── */
@media (min-width: 900px) {
  :root { --page-max: 820px; }

  /* Compose: alias + recipient side by side */
  .compose-form {
    display: grid; grid-template-columns: 1fr 1fr;
    column-gap: 1.25rem; padding: 2rem 1rem 3rem;
  }
  .compose-form > .field-group:nth-child(n+3),
  .compose-form > .error-msg,
  .compose-form > .success-msg,
  .compose-form > .compose-actions { grid-column: 1 / -1; }
  textarea { min-height: 220px; }
  .compose-actions { justify-content: flex-end; }
  .compose-actions .btn-primary { flex: 0 1 240px; }

  .history-list { padding-top: 1.1rem; gap: 0.65rem; }
  .history-item { padding: 0.95rem 1.2rem; }
  .history-item-subject { font-size: 1rem; }
  .meta-from { max-width: 320px; }

  .modal-box { max-width: 640px; }
  .modal-box-viewer { width: min(95vw, 1100px); max-width: 1100px; }
  .viewer-frame { height: 72vh; }
  .viewer-img { max-height: 74vh; }
}

@media (min-width: 1200px) {
  html, body { font-size: 16px; }
}

/* Short landscape phones */
@media (max-height: 480px) and (orientation: landscape) {
  .login-box { justify-content: flex-start; padding-top: calc(1.2rem + env(safe-area-inset-top)); }
  .login-logo { margin-bottom: 1.2rem; }
  .modal-box { max-height: 94vh; max-height: 94dvh; }
}

/* ── Respect "reduce motion" ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .btn-loader { animation-duration: 1.2s !important; animation-iteration-count: infinite !important; }
}