:root {
  --bg: #07110d;
  --bg-alt: #0f1916;
  --panel: rgba(10, 25, 20, 0.88);
  --panel-strong: rgba(4, 17, 13, 0.94);
  --line: rgba(91, 255, 190, 0.2);
  --text: #e3ffe8;
  --muted: #7db99b;
  --accent: #58ffb2;
  --accent-alt: #7bf5ff;
  --danger: #ff7a93;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }
body { margin: 0; font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; background: radial-gradient(circle at top right, rgba(123,245,255,0.08), transparent 28%), radial-gradient(circle at bottom left, rgba(88,255,178,0.1), transparent 25%), linear-gradient(135deg, #040907 0%, #0a1510 45%, #030706 100%); color: var(--text); min-height: 100vh; }
a { color: var(--accent-alt); }
button, input, select, textarea { font: inherit; }
.auth-shell { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.auth-card { position: relative; width: min(1040px,100%); display: grid; grid-template-columns: 1.3fr 0.9fr; background: linear-gradient(180deg, rgba(7,20,15,0.96), rgba(5,12,10,0.96)); border: 1px solid var(--line); border-radius: 28px; overflow: hidden; box-shadow: var(--shadow); }
.auth-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(88,255,178,0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(88,255,178,0.06) 1px, transparent 1px); background-size: 28px 28px; opacity: 0.6; pointer-events: none; }
.auth-copy, .auth-form { position: relative; z-index: 1; padding: 48px; }
.eyebrow { display: inline-block; color: var(--accent); text-transform: uppercase; letter-spacing: 0.18em; font-size: 0.72rem; margin-bottom: 12px; }
.auth-copy h1, .header h2 { margin: 0; font-size: clamp(2rem, 6vw, 4rem); letter-spacing: 0.04em; text-transform: uppercase; }
.auth-copy p, .panel-header span, .hint, .message-meta, .stack-item span, .stack-item em, .mailbox-tile small, .mailbox-tile em { color: var(--muted); }
.auth-form { background: rgba(4,14,11,0.72); border-left: 1px solid var(--line); display: grid; gap: 14px; }
label { display: grid; gap: 8px; font-size: 0.92rem; }
input, select, textarea { width: 100%; border-radius: 12px; border: 1px solid rgba(123,245,255,0.18); background: rgba(8,22,18,0.9); color: var(--text); padding: 13px 14px; outline: none; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(88,255,178,0.12); }
.primary-button, .ghost-button, .auth-form button { border: 0; border-radius: 12px; padding: 12px 16px; cursor: pointer; transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease; }
.primary-button, .auth-form button { background: linear-gradient(90deg, var(--accent), var(--accent-alt)); color: #03130d; font-weight: 700; }
.ghost-button { background: rgba(88,255,178,0.08); color: var(--text); border: 1px solid rgba(88,255,178,0.14); }
.primary-button:hover, .ghost-button:hover, .auth-form button:hover { transform: translateY(-1px); }
.error { color: var(--danger); }
.layout { display: grid; grid-template-columns: 320px 1fr; min-height: 100vh; }
.screen-glow { position: fixed; inset: 0; pointer-events: none; background: linear-gradient(to bottom, rgba(123,245,255,0.02), transparent 20%, transparent 80%, rgba(88,255,178,0.03)); }
.sidebar { background: rgba(4,12,10,0.84); border-right: 1px solid var(--line); padding: 28px 20px; display: flex; flex-direction: column; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand h1 { margin: 0; text-transform: uppercase; letter-spacing: 0.08em; font-size: 1.25rem; }
.brand p { margin: 4px 0 0; color: var(--muted); font-size: 0.82rem; }
.brand-mark { width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; color: #02120b; background: linear-gradient(135deg, var(--accent), var(--accent-alt)); font-weight: 800; }
.sidebar-section h2 { margin: 0 0 12px; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.15em; color: var(--muted); }
.mailbox-list, .stack-list { display: grid; gap: 10px; }
.mailbox-tile, .message-card, .stack-item { border-radius: 16px; border: 1px solid rgba(123,245,255,0.12); background: rgba(10,24,20,0.7); padding: 14px; }
.mailbox-tile { width: 100%; text-align: left; display: grid; gap: 4px; cursor: pointer; }
.mailbox-tile.active, .active-row { border-color: var(--accent); box-shadow: inset 0 0 0 1px rgba(88,255,178,0.35); }
.main { padding: 24px; }
.header { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 20px; }
.header-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.panel-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 18px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 24px; padding: 18px; box-shadow: var(--shadow); }
.panel-wide { min-height: 480px; }
.panel-header { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 14px; }
.panel-header h3 { margin: 0; text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.92rem; }
.message-list, .calendar-list, .stack-list-inner { display: grid; gap: 12px; }
.message-card { cursor: pointer; }
.message-card-top { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.message-card p { margin: 10px 0 0; }
.empty-state { min-height: 220px; border: 1px dashed rgba(123,245,255,0.18); border-radius: 18px; display: grid; place-items: center; padding: 24px; text-align: center; color: var(--muted); }
.compact { min-height: 110px; }
.full-width { width: 100%; }
.user-badge { margin-bottom: 10px; }
.modal { border: 0; padding: 0; background: transparent; }
.modal::backdrop { background: rgba(0,0,0,0.66); }
.modal-card { width: min(760px, calc(100vw - 32px)); background: var(--panel-strong); border: 1px solid var(--line); border-radius: 24px; padding: 22px; display: grid; gap: 14px; color: var(--text); box-shadow: var(--shadow); }
.modal-card h3, .modal-card h4 { margin: 0 0 4px; text-transform: uppercase; letter-spacing: 0.08em; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; flex-wrap: wrap; }
.detail-wide { width: min(980px, calc(100vw - 32px)); }
.detail-frame { width: 100%; min-height: 320px; border-radius: 16px; border: 1px solid rgba(123,245,255,0.12); background: #fff; }
.attachment-button { width: 100%; text-align: left; }
.admin-console section { display: grid; gap: 10px; }
@media (max-width: 1100px) { .auth-card, .layout, .panel-grid { grid-template-columns: 1fr; } .sidebar { border-right: 0; border-bottom: 1px solid var(--line); } .header { flex-direction: column; align-items: stretch; } .header-actions { flex-direction: column; } }
.nav-stack { display: grid; gap: 10px; margin: 18px 0 22px; }
.nav-button { width: 100%; text-align: left; border-radius: 14px; border: 1px solid rgba(123,245,255,0.12); background: rgba(7,19,16,0.85); color: var(--text); padding: 12px 14px; cursor: pointer; }
.nav-button.active { border-color: var(--accent); box-shadow: inset 0 0 0 1px rgba(88,255,178,0.32); }
.section-title-row { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.icon-button { width: 34px; height: 34px; border-radius: 10px; border: 1px solid rgba(88,255,178,0.18); background: rgba(88,255,178,0.08); color: var(--text); cursor: pointer; }
.mail-layout { display: grid; grid-template-columns: 1.7fr 0.9fr; gap: 18px; }
.side-panel { min-height: 480px; }
.input-like { min-width: 220px; }
.wide-select { min-width: 220px; }
.settings-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.panel-span-2 { grid-column: span 2; }
.form-grid { display: grid; gap: 14px; }
.compact-form { max-width: 100%; }
.form-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.form-span-2 { grid-column: span 2; }
.settings-split { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.mailbox-builder { grid-template-columns: 1fr 1fr; }
.info-card { border: 1px solid rgba(123,245,255,0.12); border-radius: 18px; padding: 18px; background: rgba(7,19,16,0.72); }
.flat-list { margin: 12px 0 0; padding-left: 18px; color: var(--muted); }
.calendar-grid { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 10px; }
.calendar-head { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); padding: 8px; }
.calendar-day { min-height: 140px; border-radius: 18px; border: 1px solid rgba(123,245,255,0.12); background: rgba(7,19,16,0.75); padding: 10px; display: grid; gap: 10px; align-content: start; }
.calendar-day.muted { opacity: 0.35; }
.calendar-date { font-weight: 700; }
.calendar-events-mini { display: grid; gap: 6px; }
.calendar-pill { border: 1px solid rgba(88,255,178,0.16); border-radius: 999px; background: rgba(88,255,178,0.08); color: var(--text); padding: 6px 9px; text-align: left; cursor: pointer; }
.compose-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.editor-shell { display: grid; gap: 10px; }
.editor-toolbar { display: flex; gap: 8px; flex-wrap: wrap; }
.tiny { padding: 8px 10px; border-radius: 10px; }
.composer-editor { min-height: 240px; border-radius: 16px; border: 1px solid rgba(123,245,255,0.18); background: rgba(8,22,18,0.92); padding: 16px; }
.modal-close { position: absolute; top: 16px; right: 16px; width: 38px; height: 38px; border-radius: 999px; border: 1px solid rgba(123,245,255,0.16); background: rgba(7,19,16,0.85); color: var(--text); cursor: pointer; }
.modal-card { position: relative; }
.sidebar-top { display: grid; gap: 18px; }
@media (max-width: 1100px) { .mail-layout, .settings-grid, .settings-split, .mailbox-builder, .compose-grid { grid-template-columns: 1fr; } .panel-span-2 { grid-column: span 1; } .calendar-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }