/* AI Dating — Tinder-card stack layout
   Prefix: ad-
   Mobile-first, vertical full-bleed cards, bottom gradient overlay.
*/
:root {
    --ad-bg: #0f0a14;
    --ad-bg-soft: #1a1220;
    --ad-rose: #ff4d8d;
    --ad-rose-deep: #e8336d;
    --ad-purple: #c084fc;
    --ad-text: #f4ecf7;
    --ad-text-dim: #b8a9c2;
    --ad-card-shadow: 0 18px 50px rgba(0,0,0,0.55);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    background: radial-gradient(ellipse at top, var(--ad-bg-soft), var(--ad-bg) 70%);
    color: var(--ad-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    line-height: 1.5;
    min-height: 100vh;
}
.ad-topbar {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 22px;
    background: rgba(15,10,20,0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(232,51,109,0.2);
}
.ad-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--ad-text);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: 0.02em;
}
.ad-logo img { width: 28px; height: 28px; }
.ad-nav { display: flex; gap: 18px; flex-wrap: wrap; }
.ad-nav a {
    color: var(--ad-text-dim);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}
.ad-nav a:hover { color: var(--ad-rose); }
.ad-nav a.ad-active { color: var(--ad-rose); font-weight: 600; }

.ad-hero {
    text-align: center;
    padding: 56px 22px 32px;
    max-width: 720px;
    margin: 0 auto;
}
.ad-hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    margin: 0 0 14px;
    background: linear-gradient(135deg, var(--ad-rose), var(--ad-purple));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 800;
}
.ad-hero p {
    color: var(--ad-text-dim);
    font-size: 1.05rem;
    margin: 0 auto 24px;
    max-width: 540px;
}
.ad-hero-cta {
    display: inline-block;
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--ad-rose-deep), var(--ad-purple));
    color: white;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 8px 24px rgba(232,51,109,0.4);
    transition: transform 0.15s, box-shadow 0.15s;
}
.ad-hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(232,51,109,0.55);
}

.ad-filters {
    display: flex;
    gap: 10px;
    padding: 0 22px 24px;
    max-width: 720px;
    margin: 0 auto;
    overflow-x: auto;
    scrollbar-width: none;
}
.ad-filters::-webkit-scrollbar { display: none; }
.ad-filter {
    flex-shrink: 0;
    padding: 8px 18px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(232,51,109,0.25);
    border-radius: 999px;
    color: var(--ad-text-dim);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
    user-select: none;
}
.ad-filter:hover { color: var(--ad-text); border-color: var(--ad-rose); }
.ad-filter.ad-filter-active {
    background: linear-gradient(135deg, var(--ad-rose-deep), var(--ad-purple));
    color: white;
    border-color: transparent;
}

.ad-stack {
    max-width: 480px;
    margin: 0 auto 80px;
    padding: 0 16px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}
.ad-card {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    background: var(--ad-bg-soft);
    box-shadow: var(--ad-card-shadow);
    aspect-ratio: 3 / 4;
    transition: transform 0.25s;
}
.ad-card:hover { transform: translateY(-4px); }
.ad-card-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.ad-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.92) 0%, rgba(0,0,0,0.55) 35%, transparent 65%);
    pointer-events: none;
}
.ad-card-body {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    color: white;
}
.ad-card-name {
    font-size: 1.7rem;
    font-weight: 700;
    margin: 0 0 4px;
    line-height: 1.1;
}
.ad-card-archetype {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--ad-rose-deep), var(--ad-purple));
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 12px;
}
.ad-card-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 0 0 16px;
}
.ad-topic-pill {
    padding: 4px 10px;
    background: rgba(255,255,255,0.14);
    backdrop-filter: blur(6px);
    border-radius: 999px;
    font-size: 0.72rem;
    color: var(--ad-text);
}
.ad-card-cta {
    display: block;
    text-align: center;
    padding: 12px;
    background: linear-gradient(135deg, var(--ad-rose-deep), var(--ad-purple));
    color: white;
    text-decoration: none;
    border-radius: 14px;
    font-weight: 700;
    transition: opacity 0.2s;
}
.ad-card-cta:hover { opacity: 0.9; }
.ad-swipe-hint {
    text-align: center;
    color: var(--ad-text-dim);
    font-size: 0.8rem;
    padding: 12px;
    margin-top: -16px;
    margin-bottom: 16px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    opacity: 0.7;
}
.ad-swipe-hint::before { content: "↑ "; }

.ad-footer {
    text-align: center;
    padding: 40px 22px;
    border-top: 1px solid rgba(232,51,109,0.15);
    color: var(--ad-text-dim);
    font-size: 0.85rem;
}
.ad-footer a { color: var(--ad-text-dim); text-decoration: none; margin: 0 8px; }
.ad-footer a:hover { color: var(--ad-rose); }

@media (min-width: 768px) {
    .ad-stack { max-width: 520px; }
}


/* === Universal responsive nav (single-row desktop, hamburger drawer <=1024px) === */

/* Hamburger button - hidden on desktop */
.ad-menu-btn {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: 1px solid rgba(0,0,0,0.12);
    border-radius: 8px;
    color: inherit;
    cursor: pointer;
    flex-shrink: 0;
    margin-left: auto;
    position: relative;
    transition: background 0.15s;
}
.ad-menu-btn svg {
    width: 22px;
    height: 22px;
    display: block;
}
.ad-menu-btn:hover {
    background: rgba(0,0,0,0.06);
}
.ad-menu-btn-open {
    background: rgba(0,0,0,0.08);
}
.ad-menu-btn-close {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.15s;
}
.ad-menu-btn-open .ad-menu-btn-close {
    opacity: 1;
}
.ad-menu-btn-open > svg:not(.ad-menu-btn-close) {
    opacity: 0;
}

/* Desktop (>=1025px): single-row nav, no wrap, hamburger hidden */
@media (min-width: 1025px) {
    .ad-topbar {
        display: flex !important;
        align-items: center !important;
        flex-wrap: nowrap !important;
        gap: 16px !important;
    }
    .ad-topbar > * {
        flex-shrink: 0;
    }
    .ad-topbar .ad-nav {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        align-items: center;
        gap: 12px;
        margin-left: auto !important;
        padding: 0 !important;
        background: transparent !important;
        border: none !important;
        margin-top: 0 !important;
        width: auto !important;
        flex-basis: auto !important;
    }
    .ad-topbar .ad-nav a {
        white-space: nowrap;
        padding: 0 !important;
        border: none !important;
        width: auto !important;
        display: inline-block !important;
        font-size: 0.85rem;
    }
    .ad-menu-btn {
        display: none !important;
    }
}

/* Tablet + mobile (<=1024px): hamburger visible, nav drawer */
@media (max-width: 1024px) {
    .ad-topbar {
        display: flex !important;
        flex-wrap: wrap !important;
        align-items: center;
        gap: 10px;
    }
    .ad-menu-btn {
        display: flex !important;
    }
    .ad-topbar .ad-nav {
        display: none !important;
        flex-direction: column !important;
        width: 100% !important;
        flex-basis: 100% !important;
        gap: 0 !important;
        margin: 12px 0 0 0 !important;
        padding: 12px 0 0 0 !important;
        border-top: 1px solid rgba(0,0,0,0.08);
    }
    .ad-topbar .ad-nav..ad-nav-open {
        display: flex !important;
    }
    .ad-topbar .ad-nav a {
        padding: 12px 0 !important;
        white-space: normal;
        border-bottom: 1px solid rgba(0,0,0,0.05) !important;
        width: 100% !important;
        display: block !important;
    }
    .ad-topbar .ad-nav a:last-child {
        border-bottom: none !important;
    }
}