/* ============================================================================
   Вариант 1: Premium Dark
   ------------------------------------------------------------------------
   Единая визуальная система с баннером og-image.jpg:
   • глубокий тёмный фон + синие акцентные линии
   • голубой акцент (#0EA5E9 / #38BDF8)
   • стеклянные карточки, мягкое свечение, сетка на фоне
   ============================================================================ */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg: #020617;
    --bg-elevated: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.65);
    --text: #f8fafc;
    --text-dim: #94a3b8;
    --accent: #0ea5e9;
    --accent-hover: #38bdf8;
    --accent-glow: rgba(14, 165, 233, 0.35);
    --success: #22c55e;
    --error: #ef4444;
    --warning: #f59e0b;
    --border: rgba(148, 163, 184, 0.18);
    --radius: 16px;
    --radius-lg: 20px;
    --shadow: 0 8px 32px rgba(2, 6, 23, 0.6);
}

html, body {
    height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
                 Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -webkit-tap-highlight-color: transparent;
}

body {
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(14, 165, 233, 0.18), transparent),
        radial-gradient(ellipse 60% 40% at 100% 0%, rgba(56, 189, 248, 0.08), transparent),
        linear-gradient(180deg, #020617 0%, #0b1121 100%);
    background-attachment: fixed;
    min-height: 100vh;
    position: relative;
}

/* Тонкая сетка на фоне, как на баннере */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(90deg, rgba(14, 165, 233, 0.04) 1px, transparent 1px),
        linear-gradient(rgba(14, 165, 233, 0.04) 1px, transparent 1px);
    background-size: 64px 64px;
    pointer-events: none;
    z-index: 0;
}

main {
    position: relative;
    z-index: 1;
    max-width: 680px;
    margin: 0 auto;
    padding: 32px 20px 80px;
}

/* ----- Screens ----- */

.screen {
    animation: fadeIn 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ----- Hero ----- */

.hero {
    text-align: center;
    margin-bottom: 40px;
    padding-top: 24px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    background: rgba(14, 165, 233, 0.14);
    border: 1px solid rgba(14, 165, 233, 0.35);
    color: var(--accent-hover);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.08em;
    border-radius: 100px;
    margin-bottom: 28px;
    box-shadow: 0 0 24px rgba(14, 165, 233, 0.12);
    backdrop-filter: blur(8px);
}

.badge::before {
    content: '●';
    color: var(--accent);
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.badge-success {
    background: rgba(34, 197, 94, 0.12);
    border-color: rgba(34, 197, 94, 0.35);
    color: #4ade80;
    box-shadow: 0 0 24px rgba(34, 197, 94, 0.12);
}

.badge-success::before {
    content: '✓';
    color: var(--success);
}

.badge-error {
    background: rgba(239, 68, 68, 0.12);
    border-color: rgba(239, 68, 68, 0.35);
    color: #f87171;
    box-shadow: 0 0 24px rgba(239, 68, 68, 0.12);
}

.badge-error::before {
    content: '!';
    color: var(--error);
}

h1 {
    font-size: 40px;
    font-weight: 900;
    line-height: 1.05;
    margin-bottom: 10px;
    letter-spacing: -0.03em;
    text-shadow: 0 0 40px rgba(14, 165, 233, 0.2);
}

.subtitle {
    font-size: 24px;
    color: var(--accent-hover);
    font-weight: 500;
    margin-bottom: 28px;
}

.news {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 22px;
    margin: 28px 0;
    text-align: left;
    font-size: 15px;
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.news::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--accent), var(--accent-hover));
}

.news p + p {
    margin-top: 10px;
}

.news-bold {
    color: var(--accent-hover);
    font-weight: 700;
}

/* ----- Buttons ----- */

.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 18px 26px;
    font-size: 17px;
    font-weight: 700;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.15s, background 0.2s, box-shadow 0.2s;
    -webkit-user-select: none;
    user-select: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, #0284c7 100%);
    color: white;
    box-shadow:
        0 4px 24px rgba(14, 165, 233, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:hover, .btn-primary:focus {
    background: linear-gradient(135deg, var(--accent-hover) 0%, #0ea5e9 100%);
    transform: translateY(-2px);
    box-shadow:
        0 8px 32px rgba(14, 165, 233, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    background: var(--text-dim);
    cursor: not-allowed;
    box-shadow: none;
}

.btn-secondary {
    background: rgba(30, 41, 59, 0.6);
    color: var(--text);
    border: 1px solid var(--border);
    backdrop-filter: blur(8px);
}

.btn-secondary:hover {
    background: rgba(30, 41, 59, 0.85);
    border-color: var(--accent);
    color: var(--accent-hover);
}

.hint {
    margin-top: 14px;
    font-size: 13px;
    color: var(--text-dim);
    text-align: center;
}

/* ----- Features ----- */

.features {
    display: grid;
    gap: 16px;
    margin: 44px 0;
}

.feature {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow);
    transition: transform 0.2s, border-color 0.2s;
}

.feature:hover {
    transform: translateY(-3px);
    border-color: rgba(14, 165, 233, 0.35);
}

.feature-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(14, 165, 233, 0.12);
    border: 1px solid rgba(14, 165, 233, 0.25);
    border-radius: 12px;
    font-size: 22px;
    margin-bottom: 14px;
}

.feature h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 6px;
}

.feature p {
    color: var(--text-dim);
    font-size: 14px;
    line-height: 1.5;
}

/* ----- Links ----- */

.links {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 36px 0;
}

.link-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-align: center;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    text-decoration: none;
    font-size: 15px;
    backdrop-filter: blur(8px);
    transition: border-color 0.2s, transform 0.2s;
}

.link-secondary:hover {
    border-color: var(--accent);
    transform: translateX(4px);
}

/* ----- Countdown ----- */

.countdown {
    font-size: 60px;
    font-weight: 900;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 18px 0 6px;
    text-shadow: none;
    filter: drop-shadow(0 0 24px rgba(14, 165, 233, 0.25));
}

#countdown-hint {
    font-size: 15px;
    margin-top: 0;
    margin-bottom: 28px;
    color: var(--text-dim);
}

/* ----- Key box ----- */

.key-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    margin: 28px 0;
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow);
}

.key-box label {
    display: block;
    font-size: 12px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 10px;
    font-weight: 700;
}

.key-value {
    display: block;
    background: rgba(2, 6, 23, 0.7);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 16px;
    font-family: "SF Mono", Menlo, Monaco, "Courier New", monospace;
    font-size: 13px;
    color: var(--text);
    word-break: break-all;
    line-height: 1.4;
    margin-bottom: 14px;
    max-height: 120px;
    overflow-y: auto;
}

/* ----- Instruction ----- */

.instruction {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    margin: 28px 0;
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow);
}

.instruction h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 14px;
}

.instruction ol {
    padding-left: 24px;
    margin-bottom: 14px;
}

.instruction li {
    margin-bottom: 8px;
    font-size: 15px;
    color: var(--text);
}

.instruction li::marker {
    color: var(--accent);
    font-weight: 700;
}

.instruction p {
    font-size: 14px;
    color: var(--text-dim);
}

.instruction-hint {
    margin-top: 14px;
    font-size: 13px;
}

.instruction-hint a {
    color: var(--accent-hover);
    text-decoration: none;
    font-weight: 600;
}

.instruction-hint a:hover {
    text-decoration: underline;
}

/* ----- Actions ----- */

.actions {
    margin: 28px 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* ----- CTA box (expiring) ----- */

.cta-box {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.12) 0%, rgba(239, 68, 68, 0.06) 100%);
    border: 1px solid rgba(245, 158, 11, 0.45);
    border-radius: var(--radius);
    padding: 26px;
    margin: 28px 0;
    text-align: center;
    backdrop-filter: blur(8px);
}

.cta-box p {
    margin-bottom: 14px;
    font-size: 15px;
}

.cta-box strong {
    color: var(--warning);
}

/* ----- Info banner (уже зарегистрирован) ----- */

.info-banner {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.14) 0%, rgba(99, 102, 241, 0.06) 100%);
    border: 1px solid rgba(59, 130, 246, 0.45);
    border-radius: var(--radius);
    padding: 22px;
    margin: 24px 0;
    text-align: center;
    backdrop-filter: blur(8px);
}

.info-banner p {
    margin-bottom: 10px;
    font-size: 15px;
}

.info-banner strong {
    color: #60a5fa;
}

/* ----- Divider ----- */

.divider {
    display: flex;
    align-items: center;
    margin: 28px 0;
    color: var(--text-dim);
    font-size: 13px;
}

.divider::before, .divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.divider span {
    padding: 0 16px;
}

/* ----- Footer ----- */

footer {
    margin-top: 64px;
    padding-top: 28px;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 13px;
    color: var(--text-dim);
}

footer p {
    margin-bottom: 10px;
}

footer a {
    color: var(--text);
    text-decoration: none;
    margin: 0 8px;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--accent-hover);
}

.footer-hint {
    font-size: 12px;
    opacity: 0.6;
}

/* ----- Toast ----- */

.toast {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-card);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 22px;
    font-size: 14px;
    box-shadow: var(--shadow);
    z-index: 1000;
    animation: slideUp 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    max-width: calc(100% - 40px);
    backdrop-filter: blur(12px);
}

.toast-success {
    border-color: rgba(34, 197, 94, 0.45);
}

.toast-error {
    border-color: rgba(239, 68, 68, 0.45);
}

@keyframes slideUp {
    from { opacity: 0; transform: translate(-50%, 16px); }
    to   { opacity: 1; transform: translate(-50%, 0); }
}

/* ----- Mobile tweaks ----- */

@media (max-width: 480px) {
    main { padding: 24px 16px 60px; }
    h1 { font-size: 32px; }
    .subtitle { font-size: 20px; }
    .countdown { font-size: 48px; }
    .feature { padding: 18px; }
}

/* ----- Desktop tweaks ----- */

@media (min-width: 768px) {
    main { padding: 48px 32px 100px; }
    h1 { font-size: 52px; }
    .features { grid-template-columns: repeat(3, 1fr); }
    .key-value { font-size: 14px; }
}