/**
 * TikAff shared layout system
 * Loaded globally via head_meta.php — safe overrides, mobile-first.
 */
:root {
    --tk-primary: #667eea;
    --tk-primary-2: #764ba2;
    --tk-accent: #007bff;
    --tk-success: #28a745;
    --tk-warning: #ffc107;
    --tk-danger: #dc3545;
    --tk-admin: #ff7b00;
    --tk-stats: #667eea;
    --tk-text: #1e293b;
    --tk-muted: #64748b;
    --tk-border: #e2e8f0;
    --tk-surface: #ffffff;
    --tk-radius: 16px;
    --tk-radius-sm: 10px;
    --tk-shadow: 0 12px 40px rgba(15, 23, 42, 0.12);
    --tk-shadow-sm: 0 4px 14px rgba(15, 23, 42, 0.08);
    --tk-max: 1300px;
    --tk-gap: 0.5rem;
    --tk-header-h: 64px;
    --tk-safe-bottom: env(safe-area-inset-bottom, 0px);
}

/* ---------- Base shell ---------- */
html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    overflow-x: hidden;
}

/* Full-width pages that use gradient body */
body:not(.no-tk-shell) {
    box-sizing: border-box;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

img, video, svg {
    max-width: 100%;
    height: auto;
}

/* Shared page container (pricing, profile, stats…) */
.container,
.converter-wrapper {
    width: 100%;
    max-width: var(--tk-max);
    margin-left: auto;
    margin-right: auto;
}

/* Card shell used across many pages */
.card,
.converter-wrapper .converter-card {
    background: var(--tk-surface);
    border-radius: var(--tk-radius);
    box-shadow: var(--tk-shadow);
}

/* ---------- App top bar / nav ---------- */
.app-topbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 1rem;
    width: 100%;
}

.app-topbar__title {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
}

.app-topbar__title h1 {
    margin: 0;
    font-size: clamp(1.15rem, 2.5vw, 1.5rem);
    line-height: 1.25;
    color: var(--tk-text);
}

.app-topbar__title p {
    margin: 0;
    color: var(--tk-muted);
    font-size: 0.875rem;
}

/* Nav buttons: horizontal scroll on mobile instead of chaotic wrap */
.nav-buttons,
.app-nav {
    display: flex;
    align-items: center;
    gap: var(--tk-gap);
    flex-wrap: nowrap;
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: rgba(100, 116, 139, 0.45) transparent;
    padding: 2px 2px 6px;
    /* fade hint on mobile */
    mask-image: linear-gradient(90deg, #000 92%, transparent);
    -webkit-mask-image: linear-gradient(90deg, #000 92%, transparent);
}

.nav-buttons::-webkit-scrollbar,
.app-nav::-webkit-scrollbar {
    height: 4px;
}

.nav-buttons::-webkit-scrollbar-thumb,
.app-nav::-webkit-scrollbar-thumb {
    background: rgba(100, 116, 139, 0.4);
    border-radius: 4px;
}

.nav-buttons .btn,
.app-nav .btn {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.5rem 0.9rem;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 999px;
    border: none;
    text-decoration: none;
    white-space: nowrap;
    line-height: 1.2;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, filter 0.15s ease;
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
    color: #fff;
}

.nav-buttons .btn:hover,
.app-nav .btn:hover {
    transform: translateY(-1px);
    filter: brightness(1.05);
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.14);
}

.nav-buttons .btn:active,
.app-nav .btn:active {
    transform: translateY(0);
}

.nav-buttons .btn i,
.app-nav .btn i {
    font-size: 0.95em;
    opacity: 0.95;
}

/* Semantic nav colors (override inline where present) */
.nav-buttons .btn-primary,
.app-nav .btn-primary {
    background: linear-gradient(135deg, #3b82f6, #2563eb) !important;
    color: #fff !important;
}

.nav-buttons .btn-secondary,
.app-nav .btn-secondary {
    background: #64748b !important;
    color: #fff !important;
}

.nav-buttons .btn-danger,
.app-nav .btn-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626) !important;
    color: #fff !important;
}

.nav-buttons .btn-upgrade,
.app-nav .btn-upgrade {
    background: linear-gradient(135deg, #f59e0b, #d97706) !important;
    color: #fff !important;
}

.nav-buttons .btn-stats,
.app-nav .btn-stats {
    background: linear-gradient(135deg, #667eea, #5a67d8) !important;
    color: #fff !important;
}

.nav-buttons .btn-affiliate,
.app-nav .btn-affiliate {
    background: linear-gradient(135deg, #22c55e, #16a34a) !important;
    color: #fff !important;
}

.nav-buttons .btn-admin,
.app-nav .btn-admin {
    background: linear-gradient(135deg, #f97316, #ea580c) !important;
    color: #fff !important;
}

.nav-buttons .btn.is-active,
.app-nav .btn.is-active {
    outline: 2px solid rgba(255, 255, 255, 0.85);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.35), 0 4px 14px rgba(15, 23, 42, 0.15);
}

/* Desktop: allow wrap if plenty of space */
@media (min-width: 992px) {
    .nav-buttons,
    .app-nav {
        flex-wrap: wrap;
        overflow: visible;
        mask-image: none;
        -webkit-mask-image: none;
        padding-bottom: 2px;
        justify-content: flex-end;
    }
}

/* Mobile: icon-first, larger tap targets */
@media (max-width: 768px) {
    body {
        padding-left: max(0.5rem, env(safe-area-inset-left)) !important;
        padding-right: max(0.5rem, env(safe-area-inset-right)) !important;
        padding-bottom: max(0.75rem, var(--tk-safe-bottom)) !important;
    }

    .hide-mobile {
        display: none !important;
    }

    .nav-buttons .btn,
    .app-nav .btn {
        min-height: 42px;
        min-width: 42px;
        padding: 0.55rem 0.75rem;
    }

    .nav-buttons .btn span,
    .app-nav .btn span {
        display: none;
    }

    .nav-buttons .btn i,
    .app-nav .btn i {
        margin: 0 !important;
        font-size: 1.05rem;
    }

    /* Page headers: stack cleanly */
    .header,
    .converter-wrapper .header-content,
    .app-topbar {
        flex-direction: column;
        align-items: stretch !important;
        text-align: center;
        gap: 0.85rem;
    }

    .nav-buttons,
    .app-nav {
        justify-content: flex-start;
        width: 100%;
        mask-image: linear-gradient(90deg, #000 88%, transparent);
        -webkit-mask-image: linear-gradient(90deg, #000 88%, transparent);
    }

    .card {
        border-radius: 14px;
    }

    /* Tables: horizontal scroll instead of blowing layout */
    .table-container,
    .table-responsive,
    .history-table-wrap {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    table {
        min-width: 0;
    }

    .table-container table,
    .history-table-wrap table {
        min-width: 640px;
    }
}

@media (max-width: 480px) {
    .converter-wrapper .card-header,
    .card > .header {
        padding-left: 0.85rem !important;
        padding-right: 0.85rem !important;
    }

    .plans-grid {
        grid-template-columns: 1fr !important;
        gap: 1rem !important;
        max-width: 100% !important;
    }

    .plan-card.popular {
        transform: none !important;
    }

    .duration-tabs {
        width: 100%;
        flex-wrap: wrap;
        border-radius: 14px !important;
    }
}

/* ---------- Forms / content density ---------- */
@media (max-width: 768px) {
    .converter-wrapper .main-content {
        grid-template-columns: 1fr !important;
        gap: 1rem !important;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px !important; /* prevent iOS zoom */
    }
}

/* ---------- Footer ---------- */
.site-footer {
    text-align: center;
    margin-top: 1.5rem;
    padding: 1rem 0.5rem calc(1rem + var(--tk-safe-bottom));
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.85rem;
    width: 100%;
    line-height: 1.5;
}

/* ---------- Auth pages (login/register) ---------- */
.login-container {
    width: 100%;
    max-width: 420px;
}

@media (max-width: 480px) {
    .login-container {
        padding: 1.35rem !important;
        border-radius: 14px !important;
    }

    .login-header h1 {
        font-size: 1.25rem !important;
        padding: 10px 16px !important;
    }
}

/* ---------- Utility ---------- */
.tk-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.tk-stack {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tk-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
}

/* Toast / fixed UI safe area */
.toast-container {
    top: max(12px, env(safe-area-inset-top)) !important;
    right: max(12px, env(safe-area-inset-right)) !important;
    left: auto !important;
    max-width: min(360px, calc(100vw - 24px));
}

@media (max-width: 576px) {
    .toast-container {
        left: 12px !important;
        right: 12px !important;
        max-width: none;
    }
    .toast {
        min-width: 0 !important;
        width: 100%;
    }
}

/* Free plan banner on pricing */
@media (max-width: 768px) {
    .free-plan-horizontal {
        flex-direction: column !important;
        align-items: stretch !important;
        text-align: center;
        padding: 1rem !important;
        gap: 0.75rem !important;
    }
    .free-plan-horizontal .btn,
    .free-plan-horizontal a.btn {
        width: 100%;
        justify-content: center;
    }
}

/* Upgrade / order pages denser mobile cards */
@media (max-width: 768px) {
    .header h1 {
        font-size: 1.2rem !important;
    }
    .card {
        margin-bottom: 0.75rem;
    }
}