/* ==========================================================================
   DurovMail — тёплая бумага, тёмный рельс, бирюзовый акцент, серифные заголовки.
   Структура остаётся в /static/style.css, здесь только внешний слой.
   ========================================================================== */

:root {
    /* --- Палитра --------------------------------------------------------- */
    --paper: #F4F0E8;
    --surface: #FFFDF8;
    --ink: #121A1F;
    --slate: #6C7A80;
    --line: #E4DCCF;
    --stamp: #0E8A8A;
    --stamp-dk: #0A6C6C;
    --stamp-soft: rgba(14, 138, 138, 0.13);
    --amber: #C97A1E;
    --danger: #C2452D;
    --danger-bg: #FBEAE5;

    /* --- Тёмный рельс ---------------------------------------------------- */
    --rail: #0F1B21;
    --rail-soft: #172831;
    --rail-text: #A9BFC5;

    /* --- Шрифты ---------------------------------------------------------- */
    --font-sans: "Bahnschrift", "Segoe UI Variable Text", "Segoe UI", Roboto, Arial, sans-serif;
    --font-display: "Constantia", "Palatino Linotype", Georgia, "Times New Roman", serif;
    --font-mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;

    /* --- Форма ----------------------------------------------------------- */
    --radius-sm: 9px;
    --radius-md: 16px;
    --radius-lg: 22px;
    --radius-pill: 999px;
    --shadow-pop: 0 20px 46px rgba(18, 26, 31, 0.18);
    --shadow-card: 0 6px 18px rgba(18, 26, 31, 0.06);

    /* --- Каркас ---------------------------------------------------------- */
    --sidebar-width: 248px;
    --list-width: 384px;

    /* --- Логотип --------------------------------------------------------- */
    --brand-mark-bg: rgba(255, 255, 255, 0.14);
    --brand-mark-fg: #FFFFFF;
    --brand-mark-border: rgba(255, 255, 255, 0.24);
    --brand-mark-radius: 11px;

    /* --- Фон входа ------------------------------------------------------- */
    --auth-image: radial-gradient(90% 70% at 15% 0%, #1D5B60 0%, transparent 55%),
                  radial-gradient(90% 70% at 90% 100%, #8A5A24 0%, transparent 50%),
                  linear-gradient(160deg, #0C171C 0%, #14262D 100%);
    --auth-image-overlay: none;
    --auth-image-base: #0C171C;

    /* --- Аватары --------------------------------------------------------- */
    --avatar-bg: #E9E0D2;
    --avatar-fg: #7A5A34;
    --avatar-unread-bg: var(--stamp-soft);
    --avatar-unread-fg: var(--stamp-dk);
}

/* --- Бренд --------------------------------------------------------------- */
.brand {
    display: flex;
    align-items: center;
    gap: 11px;
    font-size: 17px;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: inherit;
    text-decoration: none;
}
.brand-logo {
    width: 36px;
    height: 36px;
    object-fit: contain;
    flex-shrink: 0;
}
.brand-mark {
    width: 36px;
    height: 36px;
    border-radius: var(--brand-mark-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-mark-bg);
    border: 1px solid var(--brand-mark-border);
    color: var(--brand-mark-fg);
    font-size: 16px;
    flex-shrink: 0;
}
.brand-name { white-space: nowrap; }

/* --- Экран входа: центральная карточка ----------------------------------- */
.gate {
    position: relative;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 18px;
    padding: 72px 20px 40px;
    background:
        var(--auth-image-overlay),
        var(--auth-image) center / cover no-repeat,
        var(--auth-image-base);
}
.gate-card {
    width: 100%;
    max-width: 404px;
    padding: 30px 30px 26px;
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-pop);
}
.gate-brand {
    display: inline-flex;
    margin-bottom: 22px;
    color: var(--ink);
    text-decoration: none;
}
.gate-brand .brand { font-size: 19px; font-weight: 700; }
.gate-brand .brand-mark {
    background: var(--stamp-soft);
    border-color: rgba(14, 138, 138, 0.3);
    color: var(--stamp-dk);
}
.gate-title {
    font-family: var(--font-display);
    font-size: 30px;
    line-height: 1.15;
    font-weight: 700;
    margin: 0 0 8px;
}
.gate-subtitle {
    font-size: 13.5px;
    line-height: 1.5;
    color: var(--slate);
    margin: 0 0 22px;
}
.gate-foot {
    max-width: 420px;
    margin: 0;
    text-align: center;
    font-size: 12.5px;
    line-height: 1.55;
    color: rgba(255, 255, 255, 0.62);
}
.gate .auth-form { gap: 14px; }
.gate .auth-divider { margin: 18px 0; }
.gate .alert { margin-bottom: 14px; }

/* --- Кнопки, поля -------------------------------------------------------- */
.btn { border-radius: var(--radius-sm); letter-spacing: 0.01em; }
.btn-primary {
    background: var(--stamp);
    border-color: var(--stamp);
    box-shadow: 0 8px 18px rgba(14, 138, 138, 0.24);
}
.btn-primary:hover { background: var(--stamp-dk); border-color: var(--stamp-dk); }
.btn-ghost {
    background: transparent;
    border-color: var(--line);
    color: var(--ink);
}
.btn-ghost:hover { border-color: var(--stamp); color: var(--stamp-dk); }

.field { gap: 5px; }
.field-label {
    font-family: var(--font-sans);
    font-size: 11px;
    letter-spacing: 0.09em;
    color: var(--slate);
}
.field input,
.admin-input {
    border-radius: var(--radius-sm);
    border-color: var(--line);
    background: #FBF8F2;
    padding: 11px 13px;
}
.field input:focus-visible,
.admin-input:focus-visible {
    border-color: var(--stamp);
    outline: 2px solid var(--stamp-soft);
    outline-offset: 1px;
    background: var(--surface);
}

/* --- Каркас приложения --------------------------------------------------- */
.app-shell {
    grid-template-columns: var(--sidebar-width) var(--list-width) minmax(0, 1fr);
    background: var(--paper);
}
.sidebar {
    gap: 16px;
    padding: 16px 12px;
    background: var(--rail);
    border-right: 0;
    color: var(--rail-text);
}
.sidebar-brand {
    padding: 4px 8px 2px;
    color: #FFFFFF;
}
.sidebar-brand .brand-mark {
    background: rgba(14, 138, 138, 0.9);
    border-color: rgba(255, 255, 255, 0.18);
}
.sidebar-brand .brand-name { color: #FFFFFF; }

.account-trigger {
    background: var(--rail-soft);
    border-color: rgba(255, 255, 255, 0.09);
    border-radius: var(--radius-md);
}
.account-trigger:hover { border-color: rgba(14, 138, 138, 0.6); }
.account-trigger[aria-expanded="true"] {
    border-color: var(--stamp);
    box-shadow: 0 0 0 3px rgba(14, 138, 138, 0.22);
}
.account-email { color: #F1F6F7; }
.account-caption { color: var(--rail-text); }
.account-chevron { color: var(--rail-text); }
.account-avatar {
    background: rgba(14, 138, 138, 0.9);
    color: #FFFFFF;
}
.account-menu {
    background: var(--rail-soft);
    border-color: rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-pop);
}
.menu-item { color: #E8F1F2; border-radius: var(--radius-sm); }
.menu-item:hover { background: rgba(255, 255, 255, 0.08); }
.menu-icon { color: #7FB7BA; }
.menu-icon svg { width: 15px; height: 15px; display: block; }
.menu-sep { background: rgba(255, 255, 255, 0.1); }
.menu-item-danger, .menu-item-danger .menu-icon { color: #F29A84; }

.folder-nav { gap: 4px; }
.folder-item {
    border-radius: var(--radius-sm);
    color: var(--rail-text);
    font-size: 13.5px;
    letter-spacing: 0.02em;
    padding: 10px 11px;
}
.folder-item:hover { background: rgba(255, 255, 255, 0.07); color: #FFFFFF; }
.folder-item.is-active {
    background: var(--stamp);
    color: #FFFFFF;
    box-shadow: none;
}
.folder-item.is-active .folder-icon { color: #FFFFFF; }
.folder-badge {
    background: rgba(255, 255, 255, 0.12);
    color: #EAF4F5;
    border-radius: var(--radius-pill);
}
.folder-badge.is-strong { background: var(--surface); color: var(--stamp-dk); }

/* --- Список писем -------------------------------------------------------- */
.list-pane {
    border-right: 1px solid var(--line);
    background: var(--paper);
}
.list-header {
    padding: 20px 18px 14px;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
}
.list-title {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 0;
}
.list-subtitle { color: var(--slate); }
.list-tools { display: flex; gap: 6px; }
.icon-btn {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: var(--radius-pill);
    background: var(--surface);
    color: var(--slate);
    font-size: 15px;
    line-height: 1;
    text-decoration: none;
    cursor: pointer;
    transition: color 120ms ease, border-color 120ms ease, transform 120ms ease;
}
.icon-btn:hover { color: var(--stamp-dk); border-color: var(--stamp); transform: translateY(-1px); }
.icon-btn.is-loading { animation: spin 800ms linear infinite; }

.list-scroll { padding: 0; }
.ledger {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 10px;
}
.ledger-row {
    border: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--surface);
    padding: 13px 14px;
    box-shadow: var(--shadow-card);
}
.ledger-row:last-child { border-bottom: 1px solid var(--line); }
.ledger-row:hover { background: #FFFDF8; border-color: #D8CDBB; }
.ledger-row.is-active { background: var(--surface); border-color: var(--stamp); }
.ledger-row.is-active::before {
    width: 3px;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    background: var(--stamp);
}
.ledger-avatar {
    border-radius: 11px;
    background: var(--avatar-bg);
    color: var(--avatar-fg);
}
.ledger-row.is-unread .ledger-avatar { background: var(--stamp-soft); color: var(--stamp-dk); }
.ledger-from { font-size: 13px; }
.ledger-row:not(.is-unread) .ledger-from { color: #43525A; }
.ledger-subject { font-size: 12.5px; }
.ledger-row.is-unread .ledger-subject { color: var(--ink); }
.ledger-date { color: #97A5AA; }
.unread-dot { background: var(--amber); box-shadow: none; }
.ledger-delete { border-radius: var(--radius-pill); top: 9px; right: 9px; }

.empty-state {
    margin: 14px;
    border: 1px dashed #D8CDBB;
    border-radius: var(--radius-md);
    background: rgba(255, 253, 248, 0.6);
}
.empty-title { font-family: var(--font-display); font-size: 18px; }

/* --- Чтение письма ------------------------------------------------------- */
.reading-pane {
    background: var(--paper);
    padding: 14px;
    gap: 0;
}
.reading-placeholder {
    margin: auto;
    color: var(--slate);
    padding: 40px;
}
.reading-placeholder-mark { color: var(--stamp); opacity: 0.3; }
.reading-header {
    padding: 20px 22px 16px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-bottom: 0;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}
.reading-subject {
    font-family: var(--font-display);
    font-size: 24px;
    line-height: 1.2;
}
.reading-from { color: var(--stamp-dk); }
.reading-to, .reading-date { color: var(--slate); }
.reading-attachments {
    background: var(--surface);
    border: 1px solid var(--line);
    border-top: 0;
    border-bottom: 0;
    padding: 10px 22px;
}
.attachment-chip {
    border-radius: var(--radius-pill);
    background: var(--paper);
    border-color: var(--line);
}
.reading-frame {
    background: var(--surface);
    border: 1px solid var(--line);
    border-top: 0;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}
.reading-delete, .reading-back { border-radius: var(--radius-pill); }

/* --- Настройки и админка ------------------------------------------------- */
.settings-page {
    background:
        radial-gradient(80% 50% at 100% 0%, rgba(14, 138, 138, 0.08), transparent 55%),
        var(--paper);
}
.settings-title, .settings-card-title { font-family: var(--font-display); }
.settings-title { font-size: 30px; }
.settings-card {
    border-radius: var(--radius-md);
    border-color: var(--line);
    background: var(--surface);
    box-shadow: var(--shadow-card);
}
.settings-tab.is-active { color: var(--stamp-dk); border-bottom-color: var(--stamp); }
.account-item {
    border-radius: var(--radius-md);
    border-color: var(--line);
    background: #FBF8F2;
}
.account-avatar { background: var(--stamp); color: #FFFFFF; }
.account-badge {
    color: var(--stamp-dk);
    background: var(--stamp-soft);
    border-color: rgba(14, 138, 138, 0.3);
}
.admin-brand .brand-mark {
    background: var(--stamp-soft);
    border-color: var(--line);
    color: var(--stamp-dk);
}
.admin-table-wrap { border-radius: var(--radius-md); }
.admin-table th { background: #FBF8F2; color: var(--slate); }
.admin-table tr:hover td { background: #FFFDF8; }
.admin-provider { border-radius: var(--radius-pill); }
.modal-card { border-radius: var(--radius-md); }
.modal-backdrop { background: rgba(9, 17, 21, 0.55); }
.alert { border-radius: var(--radius-sm); }
.alert-success {
    background: var(--stamp-soft);
    color: var(--stamp-dk);
    border-color: rgba(14, 138, 138, 0.28);
}
.lang-switch {
    border-radius: var(--radius-pill);
    border-color: rgba(255, 255, 255, 0.28);
    color: #FFFFFF;
    background: rgba(255, 255, 255, 0.12);
    box-shadow: none;
    backdrop-filter: blur(6px);
}
.lang-switch:hover { border-color: #FFFFFF; }
.settings-page .lang-switch,
.admin-brand ~ * .lang-switch {
    border-color: var(--line);
    color: var(--stamp-dk);
    background: var(--surface);
}
::selection { background: rgba(14, 138, 138, 0.25); }

/* --- Узкие экраны -------------------------------------------------------- */
@media (max-width: 980px) {
    .sidebar {
        background: var(--rail);
        border-bottom: 0;
        padding: 9px 10px;
    }
    .sidebar-brand { padding: 0; }
    .sidebar-brand .brand-name { display: none; }
    .sidebar-brand .brand-mark { width: 32px; height: 32px; }
    .account { width: 196px; }
    .folder-nav { gap: 4px; }
    .folder-item { padding: 8px 11px; }
    .reading-pane { padding: 0; }
    .reading-header, .reading-frame { border-radius: 0; border-left: 0; border-right: 0; }
    .reading-attachments { border-left: 0; border-right: 0; }
}
@media (max-width: 600px) {
    .account { width: 160px; }
    .gate { padding: 56px 14px 32px; }
    .gate-card { padding: 24px 20px 22px; border-radius: var(--radius-md); }
    .gate-title { font-size: 26px; }
}