:root {
  --bg-page: #0f1513;
  --bg-card: #14231f;
  --bg-elevated: #1a2e29;
  --accent: #00c27e;
  --accent-muted: #00a86b;
  --text-primary: rgba(255,255,255,0.95);
  --text-secondary: rgba(255,255,255,0.55);
  --border: rgba(0,194,126,0.15);
  --danger: #ff4d4f;
  --radius: 8px;
  --font-mono: 'Roboto Mono', 'Consolas', 'Monaco', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  background: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
}
a { color: var(--accent); text-decoration: none; }

/* SIDEBAR — software-style */
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: 210px;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  z-index: 100;
  display: flex;
}
.sidebar-inner {
  display: flex; flex-direction: column;
  width: 100%; padding: 24px 16px 16px;
}
.top-logo {
  color: var(--accent);
  font-size: 18px; font-weight: 700;
  letter-spacing: 0.12em;
  margin-bottom: 32px;
}
.side-nav {
  display: flex; flex-direction: column; gap: 6px;
  flex: 1;
}
.side-link {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  transition: all .15s;
}
.side-link svg { width: 20px; height: 20px; fill: currentColor; }
.side-link .material-icons { font-size: 20px; color: currentColor; }
.side-link:hover { background: rgba(0,194,126,0.08); color: var(--text-primary); }
.side-link.active { background: rgba(0,194,126,0.12); color: var(--accent); }
.side-logout {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  margin-top: auto;
}
.side-logout svg { width: 18px; height: 18px; }
.side-logout .material-icons { font-size: 18px; }

/* Google Material Icons sizing and font-family */
.material-icons {
  font-family: 'Material Icons';
  font-weight: normal;
  font-style: normal;
  font-size: 18px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-feature-settings: 'liga';
  -webkit-font-smoothing: antialiased;
  font-feature-settings: 'liga';
  vertical-align: middle;
}
.btn .material-icons { font-size: 16px; }
.metric-card .material-icons { font-size: 36px; color: var(--text-primary); margin-bottom: 12px; }
.bottom-nav-link .material-icons { font-size: 22px; }
.search-icon .material-icons { font-size: 18px; color: var(--text-secondary); }
.password-toggle .material-icons { font-size: 18px; }

/* MAIN */
.app-main {
  min-height: 100vh;
  margin-left: 210px;
  padding: 48px;
  padding-bottom: 48px;
}
.app-inner {
  max-width: 1000px; margin: 0 auto;
}

/* PAGE HEADER */
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  margin-bottom: 28px;
}
h1 { font-size: 28px; font-weight: 600; letter-spacing: 0.05em; }
.page-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

/* CARDS */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 28px;
  position: relative;
  margin-bottom: 24px;
}
.card { position: relative; }
.card > .corner-tl::before, .card > .corner-tr::before,
.card > .corner-bl::before, .card > .corner-br::before {
  content: ''; position: absolute; width: 12px; height: 12px;
  border-color: var(--accent); border-style: solid; opacity: 0.5;
}
.card > .corner-tl::before { top: -1px; left: -1px;  border-width: 2px 0 0 2px; }
.card > .corner-tr::before { top: -1px; right: -1px; border-width: 2px 2px 0 0; }
.card > .corner-bl::before { bottom: -1px; left: -1px;  border-width: 0 0 2px 2px; }
.card > .corner-br::before { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }

.metric-card, .list-item, .alert, .btn, .form-group input, .form-group select, .login-card {
  border-radius: 0;
}
.metric-card { position: relative; }
.metric-card::before, .metric-card::after,
.metric-card > .corner-tl::before, .metric-card > .corner-tr::before,
.metric-card > .corner-bl::before, .metric-card > .corner-br::before {
  content: ''; position: absolute; width: 12px; height: 12px;
  border-color: var(--accent); border-style: solid; opacity: 0.5;
}
.metric-card::before        { top: -1px; left: -1px;  border-width: 2px 0 0 2px; }
.metric-card::after         { top: -1px; right: -1px; border-width: 2px 2px 0 0; }
.metric-card > .corner-tl::before { top: -1px; left: -1px;  border-width: 2px 0 0 2px; }
.metric-card > .corner-tr::before { top: -1px; right: -1px; border-width: 2px 2px 0 0; }
.metric-card > .corner-bl::before { bottom: -1px; left: -1px;  border-width: 0 0 2px 2px; }
.metric-card > .corner-br::before { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }

.list-item { position: relative; }
.list-item::before, .list-item::after,
.list-item > .corner-tl::before, .list-item > .corner-tr::before,
.list-item > .corner-bl::before, .list-item > .corner-br::before {
  content: ''; position: absolute; width: 10px; height: 10px;
  border-color: var(--accent); border-style: solid; opacity: 0.35;
}
.list-item::before        { top: -1px; left: -1px;  border-width: 2px 0 0 2px; }
.list-item::after         { top: -1px; right: -1px; border-width: 2px 2px 0 0; }
.list-item > .corner-tl::before { top: -1px; left: -1px;  border-width: 2px 0 0 2px; }
.list-item > .corner-tr::before { top: -1px; right: -1px; border-width: 2px 2px 0 0; }
.list-item > .corner-bl::before { bottom: -1px; left: -1px;  border-width: 0 0 2px 2px; }
.list-item > .corner-br::before { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }

.list-item:hover { background: rgba(0,194,126,0.04); }

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 28px 20px;
  text-align: center;
  position: relative;
}
.metric-card svg { width: 36px; height: 36px; fill: currentColor; color: var(--text-primary); margin-bottom: 12px; }
.metric-value { color: var(--accent); font-size: 38px; font-weight: 700; }
.metric-label { color: var(--text-secondary); font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; margin-top: 6px; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; margin-bottom: 28px; }

/* LISTS */
.list-group { display: flex; flex-direction: column; gap: 10px; }
.list-item {
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px; flex-wrap: wrap;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.list-main { flex: 1; min-width: 200px; }
.list-title { font-weight: 600; }
.list-meta { color: var(--text-secondary); font-size: 12px; margin-top: 4px; }
.list-actions { display: flex; align-items: center; gap: 8px; }

/* BUTTONS */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-family: inherit; font-size: 13px; font-weight: 600;
  cursor: pointer; background: transparent; color: var(--text-primary);
}
.btn svg { width: 16px; height: 16px; }
.btn-accent { background: var(--accent); color: #07120e; }
.btn-ghost { border-color: var(--border); color: var(--text-secondary); }
.btn-ghost:hover { color: var(--text-primary); border-color: var(--accent); }
.btn-sm { padding: 7px 10px; font-size: 12px; }
.btn-danger { color: var(--danger); border-color: rgba(255,77,79,0.3); }
.btn-danger:hover { background: rgba(255,77,79,0.1); }
.inline { display: inline; }

/* FORMS */
.form-stack { display: flex; flex-direction: column; gap: 18px; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 18px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-secondary); }
.form-group input, .form-group select, .form-group textarea {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 0;
  color: var(--text-primary);
  padding: 12px 14px;
  font-family: inherit;
  outline: none;
  box-shadow: inset 0 0 0 999px var(--bg-elevated);
  -webkit-text-fill-color: var(--text-primary);
}
.form-group select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--accent) 50%), linear-gradient(135deg, var(--accent) 50%, transparent 50%);
  background-position: right 14px top 50%, right 10px top 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 34px;
  cursor: pointer;
}
.form-group select option {
  background: var(--bg-elevated);
  color: var(--text-primary);
}
.form-group input:-webkit-autofill,
.form-group input:-webkit-autofill:hover,
.form-group input:-webkit-autofill:focus,
.login-card input:-webkit-autofill,
.login-card input:-webkit-autofill:hover,
.login-card input:-webkit-autofill:focus {
  -webkit-box-shadow: inset 0 0 0 999px var(--bg-elevated), 0 0 0 2px var(--accent);
  -webkit-text-fill-color: var(--text-primary);
  caret-color: var(--text-primary);
  transition: background-color 5000s ease-in-out 0s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--accent); }
.form-actions { display: flex; gap: 10px; margin-top: 6px; }

/* ALERTS */
.alert { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 18px; }
.alert-success { background: rgba(0,194,126,0.12); border: 1px solid var(--border); color: var(--accent); }
.alert-error { background: rgba(255,77,79,0.12); border: 1px solid rgba(255,77,79,0.3); color: var(--danger); }

/* BADGES */
.badge { font-size: 11px; text-transform: uppercase; padding: 4px 8px; border-radius: 4px; border: 1px solid var(--border); }
.status-info { color: var(--accent); border-color: var(--accent-muted); }
.status-error { color: var(--danger); border-color: rgba(255,77,79,0.3); }

/* EMPTY */
.empty { color: var(--text-secondary); padding: 20px 0; }

/* PASSWORD FIELD WITH TOGGLE */
.password-field {
  position: relative;
  display: flex;
}
.password-field input {
  flex: 1;
  padding-right: 42px;
}
.password-toggle {
  position: absolute; right: 0; top: 0; bottom: 0;
  width: 38px;
  display: flex; align-items: center; justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
}
.password-toggle:hover { color: var(--accent); }
.password-toggle svg { width: 18px; height: 18px; }

/* LOGIN */
.login-page {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 40px;
}
.login-card {
  width: 100%; max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 40px;
  position: relative;
  border-radius: 0;
}
.login-title { color: var(--accent); font-size: 26px; font-weight: 700; letter-spacing: 0.12em; margin-bottom: 8px; }
.login-subtitle { color: var(--text-secondary); font-size: 12px; margin-bottom: 28px; }
.login-logo { display: flex; align-items: center; gap: 14px; margin-bottom: 8px; }
.login-logo svg { width: 48px; height: 48px; flex-shrink: 0; }
.login-card .form-group label { color: var(--text-secondary); }
.login-card input[type="text"],
.login-card input[type="password"] {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 0;
}
.login-card input:focus { border-color: var(--accent); }
.login-card .btn-accent { width: 100%; justify-content: center; margin-top: 8px; }
.login-error { color: var(--danger); margin-bottom: 16px; font-size: 13px; }

/* BOTTOM NAV (mobile) */
.bottom-nav {
  position: fixed; left: 0; right: 0; bottom: 0;
  display: none;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  z-index: 200;
  justify-content: space-around;
  padding: 8px 0 env(safe-area-inset-bottom);
}
.bottom-nav-link {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  color: var(--text-secondary); font-size: 10px; padding: 6px 12px;
}
.bottom-nav-link svg { width: 22px; height: 22px; }
.bottom-nav-link.active,
.bottom-nav-link:hover { color: #fff; background: var(--accent); }
.bottom-nav-link.active svg,
.bottom-nav-link:hover svg { fill: #fff; }
.bottom-nav-link.active .material-icons,
.bottom-nav-link:hover .material-icons { color: #fff; }

/* READ MAIL */
.read-header { padding: 28px; margin-bottom: 24px; }
.read-subject { font-size: 24px; font-weight: 700; margin-bottom: 18px; word-break: break-word; }
.read-meta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.read-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--accent-muted); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; flex-shrink: 0; }
.read-from-block { flex: 1; min-width: 180px; }
.read-from-name { font-weight: 600; }
.read-from-email { color: var(--text-secondary); font-size: 13px; }
.read-date-block { text-align: right; }
.read-date { color: var(--text-secondary); font-size: 13px; }
.read-size { color: var(--accent); font-size: 12px; }
.read-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.email-field { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-bottom: 10px; }
.email-label { color: var(--accent); font-size: 12px; font-weight: 700; text-transform: uppercase; min-width: 90px; }
.email-value { color: var(--text-primary); font-size: 14px; }
.email-value-mono { font-family: var(--font-mono); font-size: 12px; word-break: break-all; }
.email-section { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--border); }
.email-section-title { color: var(--accent); font-size: 12px; font-weight: 700; text-transform: uppercase; margin-bottom: 10px; }
.headers-grid { display: flex; flex-direction: column; gap: 6px; }
.headers-row { display: flex; gap: 12px; padding: 6px 0; border-bottom: 1px solid var(--border); }
.headers-key { min-width: 140px; color: var(--accent); text-transform: capitalize; font-size: 12px; }
.headers-val { flex: 1; color: var(--text-secondary); font-size: 12px; word-break: break-word; }
.mime-summary { display: flex; flex-direction: column; gap: 8px; }
.mime-row { display: flex; gap: 12px; font-size: 12px; color: var(--text-secondary); padding: 4px 0; border-bottom: 1px solid var(--border); }
.mime-type { flex: 1; }
.mime-enc { width: 120px; }
.mime-size { width: 70px; text-align: right; }
.body-tabs { display: flex; gap: 8px; margin-bottom: 18px; border-bottom: 1px solid var(--border); padding-bottom: 10px; }
.body-tab { background: transparent; border: 1px solid transparent; color: var(--text-secondary); padding: 8px 14px; cursor: pointer; font-family: inherit; }
.body-tab.active { border-color: var(--accent); color: var(--accent); }
.email-body { background: var(--bg-elevated); border: 1px solid var(--border); padding: 20px; overflow: auto; white-space: pre-wrap; word-wrap: break-word; color: var(--text-primary); font-family: var(--font-mono); font-size: 13px; line-height: 1.6; }
.email-source { font-size: 11px; }
.email-html-frame { width: 100%; height: 500px; border: 1px solid var(--border); background: #fff; }

/* MOBILE */
@media (max-width: 800px) {
  .sidebar { display: none; }
  .app-main { margin-left: 0; padding: 24px 16px 96px; }
  .bottom-nav { display: flex; }
  h1 { font-size: 22px; }
  .card { padding: 20px; }
  .card-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .page-header { margin-bottom: 20px; }

  .list-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .list-actions {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
    margin-top: 4px;
  }

  .email-row {
    flex-direction: column !important;
    align-items: stretch !important;
  }
  .email-avatar {
    width: 40px; height: 40px; font-size: 16px; margin-right: 12px;
  }
  .email-line-top {
    flex-wrap: nowrap;
    gap: 8px;
  }
  .email-date { font-size: 11px; }
  .email-preview { max-width: 100%; }

  .page-actions {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }
  .page-actions .btn-accent { flex: 1; justify-content: center; }

  .login-page { padding: 24px; }
  .login-card { padding: 28px; }
  .login-logo { flex-direction: column; gap: 10px; align-items: flex-start; }
  .login-title { font-size: 22px; }

  .form-actions { flex-wrap: wrap; }
  .form-actions .btn { flex: 1; justify-content: center; }

  .read-subject { font-size: 20px; }
  .read-meta { gap: 12px; }
  .read-avatar { width: 40px; height: 40px; }
  .read-date-block { text-align: left; }
  .read-actions .btn { flex: 1; justify-content: center; }
  .email-label { min-width: 60px; }
}

@media (max-width: 420px) {
  .bottom-nav-link { font-size: 9px; padding: 6px 6px; }
  .bottom-nav-link svg { width: 20px; height: 20px; }
  .bottom-nav-link .material-icons { font-size: 20px; }
  .btn-sm { padding: 6px 8px; font-size: 11px; }
  .btn-sm svg { width: 14px; height: 14px; }
  .list-actions { gap: 6px; }
  .page-actions .btn { padding: 8px 12px; font-size: 12px; }
  .read-subject { font-size: 18px; }
}