:root {
    --bg-main: #0b0e14;
    --bg-card: #131822;
    --bg-elevated: #1a2130;
    --bg-input: #0f141d;
    --bg-header: rgba(19, 24, 34, 0.92);
    --bg-modal-panel: #141b26;
    --bg-modal-box: #0f151f;
    --border-color: #263042;
    --border-glow: #38bdf8;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-primary: #38bdf8;
    --accent-green: #10b981;
    --accent-green-hover: #059669;
    --accent-red: #ef4444;
    --accent-yellow: #f59e0b;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.45);
}

html[data-theme="light"] {
    --bg-main: #f4f6fb;
    --bg-card: #ffffff;
    --bg-elevated: #eef2f8;
    --bg-input: #f8fafc;
    --bg-header: rgba(255, 255, 255, 0.95);
    --bg-modal-panel: #ffffff;
    --bg-modal-box: #f1f5f9;
    --border-color: #dbe3ef;
    --border-glow: #0052ff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --accent-primary: #0052ff;
    --accent-green: #10b981;
    --accent-green-hover: #059669;
    --accent-red: #ef4444;
    --accent-yellow: #d97706;
    --shadow-soft: 0 8px 24px rgba(15, 23, 42, 0.07);
}

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

html, body {
    min-height: 100vh;
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    transition: background-color 0.2s ease, color 0.2s ease;
}

body {
    display: flex;
    flex-direction: column;
}

.hidden {
    display: none !important;
}

/* ================= ШАПКА БІРЖІ ================= */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-header);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.header-inner {
    max-width: 1360px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.brand-logo {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    font-weight: 800;
    font-size: 1.35rem;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.brand-accent {
    color: var(--accent-primary);
}

.brand-domain {
    color: var(--text-primary);
}

.brand-badge {
    margin-left: 10px;
    padding: 3px 8px;
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: 6px;
    background: rgba(56, 189, 248, 0.15);
    color: var(--accent-primary);
    border: 1px solid rgba(56, 189, 248, 0.35);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-tab {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid transparent;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    min-height: 44px;
}

.nav-tab:hover {
    color: var(--text-primary);
    background: var(--bg-elevated);
}

.nav-tab.active {
    color: #ffffff;
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    font-weight: 700;
}

html:not([data-theme="light"]) .nav-tab.active {
    color: #0b0e14;
}

.header-right-controls {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.theme-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 13px;
    min-height: 38px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    color: var(--text-primary);
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
    border-color: var(--accent-primary);
}

.theme-icon {
    font-size: 0.95rem;
    line-height: 1;
}

.locale-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 12px;
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.35);
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
}

.locale-code {
    color: var(--accent-primary);
}

.locale-sep {
    color: var(--text-muted);
}

.locale-fiat {
    color: var(--accent-green);
}

.header-user-panel {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 600;
    white-space: nowrap;
}

.online-indicator {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent-green);
    box-shadow: 0 0 8px var(--accent-green);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 10px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.burger-line {
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
}

/* ================= ОСНОВНИЙ КОНТЕЙНЕР ТА ПІДВАЛ ================= */
.main-container {
    flex: 1;
    width: 100%;
    max-width: 1360px;
    margin: 0 auto;
    padding: 28px 20px 48px;
}

.site-footer {
    border-top: 1px solid var(--border-color);
    background: var(--bg-card);
    padding: 20px;
    margin-top: auto;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.footer-inner {
    max-width: 1360px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ================= АДАПТИВНІСТЬ: ПЛАНШЕТИ (до 992px) ================= */
@media (max-width: 992px) {
    .header-inner {
        padding: 12px 16px;
        flex-wrap: wrap;
    }

    .main-nav {
        order: 3;
        width: 100%;
        justify-content: flex-start;
        overflow-x: auto;
        padding-top: 8px;
        border-top: 1px solid var(--border-color);
    }

    .nav-tab {
        white-space: nowrap;
        padding: 8px 14px;
        font-size: 0.88rem;
    }
}

/* ================= АДАПТИВНІСТЬ: СМАРТФОНИ (до 680px) ================= */
@media (max-width: 680px) {
    .mobile-menu-btn {
        display: flex;
    }

    .header-right-controls {
        gap: 6px;
    }

    .theme-toggle-btn {
        padding: 5px 10px;
        min-height: 34px;
        font-size: 0.75rem;
    }

    .locale-pill {
        padding: 5px 9px;
        font-size: 0.74rem;
    }

    .header-user-panel {
        padding: 6px 10px;
        font-size: 0.8rem;
    }

    .main-nav {
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        padding-top: 12px;
    }

    .main-nav.open {
        display: flex;
    }

    .nav-tab {
        width: 100%;
        text-align: left;
    }

    .main-container {
        padding: 18px 12px 36px;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
}