@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@300;500;700&family=Roboto+Mono:wght@300;400;500&display=swap');

:root {
    --bg-color: #030303;
    --text-primary: #f0f0f0;
    --text-secondary: #aaaaaa;
    --text-muted: #666666;
    --border-dim: #222222;
    --border-hover: #444444;
    --border-active: #ffffff;
    --panel-bg: rgba(10, 10, 10, 0.85);
    --panel-surface: rgba(18, 18, 18, 0.9);
    --accent-glow: rgba(255, 255, 255, 0.15);
    --accent-glow-strong: rgba(255, 255, 255, 0.25);
    --gradient-panel: linear-gradient(135deg, rgba(20, 20, 20, 0.85), rgba(8, 8, 8, 0.95));
    --gradient-fade: linear-gradient(180deg, transparent, rgba(5, 5, 5, 0.8));
    --gradient-left: linear-gradient(90deg, rgba(20, 20, 20, 0.8), transparent);
    --gradient-tab-active: linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent);
    --gradient-tab-hover: linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.6);
    --radius: 0px;
    --transition-fast: 0.2s ease-out;
    --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    font-family: 'Roboto Mono', monospace;
    overflow-x: hidden;
    position: relative;
    overflow-y: auto;
}

#bg-video-wrap {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

#bg-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
    will-change: transform;
    filter: grayscale(100%) brightness(0.6);
}

#bg-video-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.82);
    pointer-events: none;
}

.container {
    max-width: 800px;
    width: 100%;
    padding: 4rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 10;
    transform-style: preserve-3d;
    transition: transform 0.1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateZ(-50px);
    }

    to {
        opacity: 1;
        transform: translateZ(0);
    }
}

.video-header,
.tabs-wrapper,
.section-header,
.links-section,
.requisites-section {
    opacity: 0;
    animation: fadeInUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
    transform-style: preserve-3d;
}

.video-header {
    animation-delay: 0.1s;
}

.section-header {
    animation-delay: 0.5s;
}

.links-section {
    animation-delay: 0.7s;
}

.requisites-section {
    animation-delay: 0.9s;
}

.video-header {
    width: 100%;
    max-width: 500px;
    margin-bottom: 4rem;
    display: flex;
    justify-content: center;
    transform: translateZ(40px);
}

.logo-video {
    width: 100%;
    height: auto;
    filter: grayscale(100%) contrast(1.1);
    mask-image: linear-gradient(to bottom, black 85%, transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, black 85%, transparent 100%);
    will-change: transform;
}

.manifesto-section {
    width: 100%;
    max-width: 700px;
    padding: 2.5rem;
    border-left: 2px solid var(--border-dim);
    background: var(--gradient-left);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-top: none;
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-md);
}

.tabs-wrapper + .section-header {
    margin-top: 5rem;
}

.manifesto-text {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    text-align: justify;
    font-weight: 300;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
}

.manifesto-text:last-child {
    margin-bottom: 0;
}

.section-header {
    width: 100%;
    text-align: center;
    border-bottom: 1px solid var(--border-dim);
    line-height: 0.1em;
    margin: 0 0 4rem;
    transform: translateZ(30px);
}

.section-header span {
    background: transparent;
    padding: 0 1.5rem;
    font-family: 'Oswald', sans-serif;
    font-size: 1.5rem;
    font-weight: 300;
    text-transform: uppercase;
    letter-spacing: 0.25em;
    color: var(--text-primary);
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.15);
}

.links-section {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-bottom: 5rem;
    perspective: 800px;
}

.link-item {
    background: var(--panel-bg);
    border: 1px solid var(--border-dim);
    padding: 3.5rem 2rem;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
    box-shadow: var(--shadow-lg);
}

.link-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    box-shadow: inset 0 0 20px var(--accent-glow);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.link-item:hover {
    border-color: var(--border-active);
    background: #0f0f0f;
    transform: translateY(-5px) scale(1.02);
}

.link-item:hover::after {
    opacity: 1;
}

.link-icon {
    font-size: 2.2rem;
    color: var(--text-secondary);
    margin-bottom: 1.2rem;
    transition: 0.4s;
    transform: translateZ(25px);
}

.link-title {
    font-family: 'Oswald', sans-serif;
    font-size: 1.15rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-primary);
    transition: 0.4s;
    transform: translateZ(15px);
}

.link-item:hover .link-icon {
    color: var(--text-primary);
    transform: translateZ(40px) scale(1.1);
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.4);
}

.link-item:hover .link-title {
    letter-spacing: 0.3em;
    transform: translateZ(25px);
}

.requisites-section {
    width: 100%;
    padding: 3rem 1rem;
    border-top: 1px solid var(--border-dim);
    display: flex;
    flex-direction: column;
    align-items: center;
    transform: translateZ(10px);
    background: var(--gradient-fade);
}

.req-title {
    font-family: 'Oswald', sans-serif;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.25em;
    margin-bottom: 2rem;
    opacity: 0.7;
}

.crypto-row {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
    width: 100%;
}

.crypto-label {
    font-size: 0.8rem;
    color: var(--border-active);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.crypto-addr {
    font-family: 'Roboto Mono', monospace;
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: #080808;
    padding: 0.8rem 1.2rem;
    border: 1px solid var(--border-dim);
    transition: 0.3s;
    user-select: all;
    letter-spacing: 0.05em;
    position: relative;
    overflow: hidden;
}

.crypto-addr:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
    cursor: copy;
    background: #111;
    transform: scale(1.02);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}

.req-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: -1.5rem;
    margin-bottom: 2.5rem;
    text-align: center;
    font-weight: 300;
    max-width: 600px;
}

.req-footer {
    margin-top: 3rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    width: 100%;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 2rem;
}

.req-footer p {
    margin-bottom: 1rem;
}

.req-footer a {
    color: var(--border-active);
    text-decoration: none;
    border-bottom: 1px dotted var(--border-active);
    transition: 0.3s;
}

.req-footer a:hover {
    color: #fff;
    border-bottom-style: solid;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.glory-text {
    font-family: 'Oswald', sans-serif;
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text-primary);
    margin: 2rem 0 1rem;
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
}

.sign-off {
    font-family: 'Oswald', sans-serif;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
    opacity: 0.8;
}

/* === TABS === */

.tabs-wrapper {
    width: 100%;
    max-width: 700px;
    margin-bottom: 0;
    transform: translateZ(20px);
    opacity: 0;
    animation: fadeInUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
    animation-delay: 0.25s;
    transform-style: preserve-3d;
}

.tabs-nav {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border-dim);
    position: relative;
    background: var(--panel-bg);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-bottom: none;
}

.tab-btn {
    font-family: 'Oswald', sans-serif;
    font-size: 0.8rem;
    font-weight: 300;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    padding: 1.2rem 1.5rem;
    cursor: pointer;
    transition: all var(--transition-smooth);
    position: relative;
    white-space: nowrap;
    flex: 1;
    text-align: center;
    overflow: hidden;
}

.tab-btn:last-child {
    border-right: none;
}

.tab-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-tab-hover);
    opacity: 0;
    transition: opacity var(--transition-smooth);
    pointer-events: none;
}

.tab-btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    box-shadow: inset 0 0 20px var(--accent-glow);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.tab-btn:hover {
    color: var(--text-secondary);
    background: #0a0a0a;
    letter-spacing: 0.3em;
    text-shadow: 0 0 12px rgba(255, 255, 255, 0.35);
}

.tab-btn:hover::before {
    opacity: 1;
}

.tab-btn:hover::after {
    opacity: 1;
}

.tab-btn.active {
    color: var(--text-primary);
    border-bottom-color: var(--text-primary);
    background: rgba(15, 15, 15, 0.6);
    letter-spacing: 0.25em;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

.tab-btn.active::before {
    background: var(--gradient-tab-active);
    opacity: 1;
}

.tab-btn.active::after {
    opacity: 1;
    box-shadow: inset 0 0 25px var(--accent-glow-strong);
}

.tab-btn .tab-icon {
    margin-right: 0.5rem;
    font-size: 0.75rem;
    opacity: 0.6;
    transition: opacity var(--transition-smooth);
}

.tab-btn.active .tab-icon {
    opacity: 1;
}

.tab-panels {
    position: relative;
    width: 100%;
}

.tab-panel {
    display: none;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.tab-panel.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* panel: manifesto — inherits .manifesto-section styles */

/* panel: backups */
.backups-panel {
    padding: 2.5rem;
    background: var(--gradient-left);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-top: none;
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-md);
}

.backups-panel .backup-group {
    margin-bottom: 2rem;
}

.backups-panel .backup-group:last-child {
    margin-bottom: 0;
}

.backups-panel .backup-label {
    font-family: 'Oswald', sans-serif;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.backups-panel .backup-label i {
    font-size: 0.75rem;
    opacity: 0.5;
}

.backups-panel .backup-link {
    display: block;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: none;
    padding: 0.6rem 1rem;
    border: 1px solid var(--border-dim);
    background: rgba(5, 5, 5, 0.6);
    margin-bottom: 0.5rem;
    transition: all var(--transition-smooth);
    letter-spacing: 0.02em;
}

.backups-panel .backup-link:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
    background: rgba(15, 15, 15, 0.8);
    transform: translateX(4px);
}

.backups-panel .backup-note {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 1.5rem;
    font-style: italic;
    font-weight: 300;
}

/* panel: language */
.lang-panel {
    padding: 2.5rem;
    background: var(--gradient-left);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-top: none;
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-md);
    text-align: center;
}

/* === Language switch — сегментированный контрол в стиле .feed-switch ===
   единый горизонтальный переключатель: флаг + полное название,
   общие границы, активный сегмент — градиент + inset glow */
.lang-switch {
    display: flex;
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
    border: 1px solid var(--border-dim);
    background: rgba(5, 5, 5, 0.6);
}

.lang-opt {
    flex: 1;
    min-width: 0;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    padding: 0.95rem 0.7rem;
    background: transparent;
    border: none;
    border-right: 1px solid var(--border-dim);
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-smooth);
}

.lang-opt:last-child { border-right: none; }

/* inset glow inside the segment, like tabs / link cards */
.lang-opt::after {
    content: '';
    position: absolute;
    inset: 0;
    box-shadow: inset 0 0 20px var(--accent-glow);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.lang-opt:hover { background: rgba(15, 15, 15, 0.8); }

.lang-opt.active {
    background: var(--gradient-tab-active);
    box-shadow: inset 0 0 20px var(--accent-glow);
}
.lang-opt.active::after { opacity: 1; }

/* Гербы-щиты (шевроны) отключены — оставлено закомментированным на всякий случай:
.lang-crest {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 8px 8px 12px;
    background: #0c0c0c;
    border: 1px solid var(--border-dim);
    border-radius: 0 0 42% 42% / 0 0 55% 55%;
    transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}
*/

/* флаг */
.lang-flag {
    flex: 0 0 auto;
    width: 26px;
    height: 18px;
    object-fit: cover;
    display: block;
    border: 1px solid var(--border-hover);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
    transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

/* полное название языка */
.lang-name {
    font-family: 'Oswald', sans-serif;
    font-size: 0.82rem;
    font-weight: 300;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-muted);
    transition: color var(--transition-smooth), text-shadow var(--transition-smooth),
                letter-spacing var(--transition-smooth);
}

/* the shield (шеврон) — отключено, оставлено закомментированным:
.lang-shield {
    position: relative;
    width: 68px;
    height: 76px;
    overflow: hidden;
    border-radius: 0 0 46% 46% / 0 0 58% 58%;
    border: 1px solid var(--border-hover);
    transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth),
                transform var(--transition-smooth);
}
.lang-shield img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
*/

/* active — белый текст + светящаяся рамка флага */
.lang-opt.active .lang-name { color: var(--text-primary); }
.lang-opt.active .lang-flag { border-color: var(--border-active); }

/* hover — подсветка текста и разрядка, как у табов */
.lang-opt:hover .lang-name {
    color: var(--text-secondary);
    letter-spacing: 0.18em;
    text-shadow: 0 0 12px var(--accent-glow-strong);
}
.lang-opt:hover .lang-flag {
    border-color: var(--border-active);
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.22);
}

@media (max-width: 560px) {
    /* остаётся горизонтальным (флаг рядом с названием), только компактнее */
    .lang-opt { gap: 0.35rem; padding: 0.7rem 0.3rem; }
    .lang-flag { width: 20px; height: 14px; }
    .lang-name { font-size: 0.58rem; letter-spacing: 0.04em; }
    .lang-opt:hover .lang-name { letter-spacing: 0.06em; }
}

.lang-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 1.5rem;
    font-weight: 300;
    letter-spacing: 0.05em;
}

@media (max-width: 650px) {
    .links-section {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .container {
        padding: 2rem 1rem;
    }

    .section-header span {
        font-size: 1.2rem;
        padding: 0 1rem;
    }

    .container,
    .video-header,
    .manifesto-section,
    .tabs-wrapper,
    .section-header,
    .links-section,
    .requisites-section,
    .link-icon,
    .link-title {
        transform: none !important;
        animation: none !important;
        opacity: 1 !important;
    }

    .tab-btn {
        padding: 0.8rem 1rem;
        font-size: 0.7rem;
        letter-spacing: 0.1em;
    }

    .tab-btn .tab-icon {
        display: none;
    }

    .link-item {
        transform: none !important;
        box-shadow: none !important;
        border: 1px solid var(--border-dim);
    }

    .link-item:hover {
        transform: translateY(-2px) !important;
    }

    .manifesto-text {
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }

    .link-item {
        padding: 2rem 1rem;
    }

    .crypto-addr {
        font-size: 0.75rem;
        padding: 0.6rem 1rem;
        width: 100%;
        text-align: center;
        word-break: break-all;
    }
}