/* ============================================================
   М-16 — современный стиль (всё локально, без внешних CDN)
   База — старый style.css, переработано: единый layout,
   self-hosted Inter, мягкие тени, hero, sticky footer, тёмная тема.
   ============================================================ */

/* --- Локальный шрифт Inter (variable) -------------------------------- */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
    src: url('../fonts/InterVariable.woff2') format('woff2');
}
@font-face {
    font-family: 'Inter';
    font-style: italic;
    font-weight: 100 900;
    font-display: swap;
    src: url('../fonts/InterVariable-Italic.woff2') format('woff2');
}

:root {
    --primary: #6366f1;
    --primary-2: #8b5cf6;
    --primary-color: #6366f1;
    --secondary-color: #7c3aed;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --dark-color: #1e293b;
    --muted: #64748b;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --bg: #eef2ff;
    --card-bg: #ffffff;
    --border: #e5e7eb;

    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    --gradient-info: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);

    --shadow-sm: 0 1px 2px 0 rgba(16, 24, 40, 0.05);
    --shadow-md: 0 4px 12px -2px rgba(16, 24, 40, 0.10);
    --shadow-lg: 0 12px 28px -6px rgba(16, 24, 40, 0.16);
    --shadow-xl: 0 24px 48px -12px rgba(16, 24, 40, 0.22);
    --radius: 18px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background:
        radial-gradient(1200px 600px at 15% -10%, rgba(99, 102, 241, 0.18), transparent 60%),
        radial-gradient(1000px 500px at 100% 0%, rgba(139, 92, 246, 0.16), transparent 55%),
        linear-gradient(180deg, #f5f7ff 0%, #eef2ff 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    margin: 0;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* sticky footer wrapper */
.page { display: flex; flex-direction: column; min-height: 100vh; }
.page-main { flex: 1 0 auto; }

/* --- Анимации -------------------------------------------------------- */
@keyframes fadeIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideInUp { from { opacity: 0; transform: translateY(26px); } to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
}

.container { animation: fadeIn 0.5s ease-out; }

/* --- Hero ------------------------------------------------------------ */
.hero { text-align: center; padding: 2.5rem 1rem 1rem; animation: fadeIn 0.7s ease-out; }
.hero .logo {
    width: 110px; height: auto; margin-bottom: 1rem;
    filter: drop-shadow(0 8px 18px rgba(99, 102, 241, 0.25));
    transition: transform 0.3s ease;
}
.hero .logo:hover { transform: scale(1.06) rotate(-1deg); }
.hero-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    background: var(--gradient-primary);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0.25rem 0;
}
.hero-sub { color: var(--muted); font-size: 1.05rem; margin: 0; }

.main-title {
    background: var(--gradient-primary);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800; letter-spacing: -0.02em;
    font-size: clamp(1.5rem, 3.5vw, 2rem);
}

/* --- Карточки -------------------------------------------------------- */
.card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    animation: slideInUp 0.5s ease-out;
}
.card:hover { box-shadow: var(--shadow-xl); transform: translateY(-3px); }

.card-header {
    background: var(--gradient-primary);
    color: #fff; padding: 1.25rem 1.5rem; border: none; font-weight: 700;
}
.card-header h1, .card-header h2, .card-header h3, .card-header h4, .card-header h5 { color: #fff; margin: 0; }
.card-body { padding: 1.75rem; }

/* --- Кнопки ---------------------------------------------------------- */
.btn {
    --btn-bg: var(--gradient-primary);
    border: none; border-radius: 12px; padding: 0.7rem 1.4rem;
    font-weight: 600; letter-spacing: 0.01em;
    transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
    box-shadow: var(--shadow-sm);
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 3px solid rgba(99, 102, 241, 0.4); outline-offset: 2px; }

.btn-primary { background: var(--gradient-primary); color: #fff; }
.btn-success { background: var(--gradient-success); color: #fff; }
.btn-danger  { background: var(--gradient-danger);  color: #fff; }
.btn-info    { background: var(--gradient-info);    color: #fff; }
.btn-warning { background: var(--gradient-warning); color: #fff; }
.btn-secondary { background: linear-gradient(135deg, #64748b 0%, #475569 100%); color: #fff; }
.btn-light { background: #fff; color: var(--primary); }

.btn-outline-primary { background: #fff; color: var(--primary); border: 2px solid var(--primary); box-shadow: none; }
.btn-outline-primary:hover { background: var(--gradient-primary); color: #fff; border-color: transparent; }
.btn-outline-secondary { background: #fff; color: var(--muted); border: 2px solid var(--border); box-shadow: none; }
.btn-outline-secondary:hover { background: #f8fafc; color: var(--dark-color); }
.btn-sm { padding: 0.4rem 0.9rem; font-size: 0.85rem; }
.btn-lg { padding: 0.9rem 1.7rem; font-size: 1.05rem; }

/* --- Сетка быстрых кнопок -------------------------------------------- */
.button-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 0.9rem;
}
.button-grid .btn {
    width: 100%; padding: 1rem; font-size: 1rem;
    display: flex; align-items: center; justify-content: center; gap: 0.4rem;
}

/* --- Формы ----------------------------------------------------------- */
.form-control, .form-select {
    border: 2px solid var(--border);
    border-radius: 12px; padding: 0.75rem 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease; font-size: 1rem;
}
.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.14); outline: none;
}
.form-label { font-weight: 600; color: var(--dark-color); margin-bottom: 0.4rem; }
.input-group-text {
    background: var(--gradient-primary); color: #fff; border: none;
    border-radius: 12px 0 0 12px; font-weight: 600;
}

/* --- Алерты ---------------------------------------------------------- */
.alert { border: none; border-radius: 14px; padding: 1rem 1.25rem; box-shadow: var(--shadow-sm); }
.alert-success { background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%); color: #065f46; }
.alert-danger  { background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%); color: #991b1b; }
.alert-warning { background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%); color: #92400e; }
.alert-info    { background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%); color: #1e40af; }

/* --- Инфо-блоки ------------------------------------------------------ */
.info-block {
    background: linear-gradient(135deg, #f0f9ff 0%, #eef2ff 100%);
    border-left: 4px solid var(--info-color);
    padding: 1.25rem 1.4rem; border-radius: 14px; margin: 1rem 0;
}
.info-block h5, .info-block h6 { margin-top: 0; }

/* --- Данные (строки ключ-значение) ----------------------------------- */
.data-row {
    display: flex; justify-content: space-between; align-items: center; gap: 1rem;
    padding: 0.9rem 0.25rem; border-bottom: 1px solid var(--border);
}
.data-row:last-child { border-bottom: none; }
.data-label { font-weight: 600; color: var(--muted); font-size: 0.92rem; }
.data-value { font-weight: 700; color: var(--dark-color); font-size: 1.05rem; }

/* --- Карточка-авторизация / forgot ----------------------------------- */
.login-container { display: flex; align-items: center; justify-content: center; min-height: 80vh; padding: 2rem 1rem; }
.login-card {
    max-width: 460px; width: 100%; background: var(--card-bg);
    border-radius: 22px; box-shadow: var(--shadow-xl); overflow: hidden;
    animation: slideInUp 0.5s ease-out;
}
.login-header { background: var(--gradient-primary); color: #fff; padding: 2.5rem 2rem; text-align: center; }
.login-header h2 { color: #fff; margin: 0; }
.login-body { padding: 2.5rem 2rem; }

/* --- Новости --------------------------------------------------------- */
.news-item { padding: 1.1rem 0; }
.news-item h5 { font-weight: 700; margin-bottom: 0.4rem; }
.news-item h5 a { color: var(--text-primary); }
.news-item h5 a:hover { color: var(--primary); }
.news-item p { color: var(--text-secondary); }
.news-content { font-size: 1.02rem; line-height: 1.85; color: var(--text-primary); }
.news-content p { margin-bottom: 1rem; }
.news-content img { max-width: 100%; height: auto; border-radius: 14px; margin: 1rem 0; }

/* --- Аккордеон FAQ --------------------------------------------------- */
.accordion .card .card-header { background: var(--gradient-primary); padding: 0; }
.accordion .card .card-header .btn-link {
    color: #fff; padding: 1.1rem 1.4rem; width: 100%; text-align: left;
    text-decoration: none; box-shadow: none;
}
.accordion .card .card-header .btn-link h5 { color: #fff; }

/* --- Ссылки ---------------------------------------------------------- */
a { color: var(--primary); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--secondary-color); }

/* --- Footer ---------------------------------------------------------- */
.site-footer {
    flex-shrink: 0; text-align: center; color: var(--muted);
    padding: 2rem 1rem; font-size: 0.9rem;
}
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--primary); }

/* --- Скроллбар ------------------------------------------------------- */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--gradient-primary); border-radius: 6px; }

textarea.form-control { resize: vertical; min-height: 120px; }

/* --- Кнопки управления (тема / установка) ---------------------------- */
.app-controls {
    position: fixed; top: 14px; right: 14px; z-index: 1050;
    display: flex; align-items: center; gap: 0.5rem;
}
.ctl-btn {
    border: 1px solid var(--border);
    background: var(--card-bg); color: var(--text-primary);
    border-radius: 999px; cursor: pointer;
    box-shadow: var(--shadow-md);
    font-weight: 600; line-height: 1;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.ctl-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.ctl-btn:focus-visible { outline: 3px solid rgba(99, 102, 241, 0.4); outline-offset: 2px; }
#theme-btn { width: 44px; height: 44px; font-size: 1.25rem; padding: 0; }
.ctl-install {
    display: inline-flex; align-items: center; gap: 0.45rem;
    height: 44px; padding: 0 1rem;
    background: var(--gradient-primary); color: #fff; border-color: transparent;
}
.ctl-install .ctl-ic { font-size: 1.15rem; }
@media (max-width: 576px) {
    .ctl-install .ctl-tx { display: none; }   /* на телефоне — только иконка */
    .ctl-install { width: 44px; padding: 0; justify-content: center; }
}

/* плавное переключение темы */
body, .card, .ctl-btn, .form-control, .info-block { transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease; }

/* --- Тёмная (ночная) тема -------------------------------------------- */
[data-theme="dark"] {
    --card-bg: #1e293b;
    --text-primary: #e2e8f0;
    --text-secondary: #cbd5e1;
    --dark-color: #f1f5f9;
    --muted: #94a3b8;
    --border: #334155;
}
[data-theme="dark"] body {
    background:
        radial-gradient(1200px 600px at 15% -10%, rgba(99, 102, 241, 0.22), transparent 60%),
        radial-gradient(1000px 500px at 100% 0%, rgba(139, 92, 246, 0.18), transparent 55%),
        linear-gradient(180deg, #0f172a 0%, #111827 100%);
    color: var(--text-primary);
}
[data-theme="dark"] .card { border-color: rgba(148, 163, 184, 0.12); }
[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select { background: #0f172a; color: var(--text-primary); }
[data-theme="dark"] .form-control::placeholder { color: #64748b; }
[data-theme="dark"] .info-block { background: linear-gradient(135deg, #1e293b 0%, #1e1b4b 100%); }
[data-theme="dark"] .btn-light { background: #e2e8f0; color: #1e293b; }
[data-theme="dark"] .btn-outline-secondary { background: #1e293b; color: var(--text-secondary); }
/* ссылки в тёмной теме — светлее, чтобы читались (кроме кнопок) */
[data-theme="dark"] a:not(.btn) { color: #a5b4fc; }
[data-theme="dark"] a:not(.btn):hover { color: #c7d2fe; }
[data-theme="dark"] .news-item h5 a { color: var(--text-primary); }
[data-theme="dark"] .alert-success { background: #064e3b; color: #d1fae5; }
[data-theme="dark"] .alert-danger  { background: #7f1d1d; color: #fee2e2; }
[data-theme="dark"] .alert-warning { background: #78350f; color: #fef3c7; }
[data-theme="dark"] .alert-info    { background: #1e3a8a; color: #dbeafe; }

/* --- Адаптивность ---------------------------------------------------- */
@media (max-width: 768px) {
    .card-body { padding: 1.35rem; }
    .button-grid { grid-template-columns: 1fr; }
}
@media (max-width: 576px) {
    .login-body { padding: 2rem 1.4rem; }
    .login-header { padding: 2rem 1.4rem; }
}