:root {
    --card-border: 1px solid #F00;
    --card-bg: #e36159;
    --radius-card: 16px;
    --transition-base: 0.2s ease;
    --text-dim: #fff;
    --track-name: #fff;
}

/* ─── Training Grid ─────────────────────────── */
.training-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
    gap: 1.5rem;
    padding: 2rem 0;
}

/* CSS Containment: Hover animasyon tek kartta kalır, diğerler etkilenmez */
.training-card {
    background: var(--card-bg);
    border: var(--card-border);
    border-radius: var(--radius-card);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 1.5rem;
    contain: layout style;
    /* will-change: yalnızca hover anında (JS ile eklenecek değil, CSS ile) */
    transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.training-card:hover {
    transform: translateY(-6px);
    border-color: rgba(99, 102, 241, 0.5);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.25);
}

.card-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: black;
    margin-bottom: 0.6rem;
    line-height: 1.3;
}

.card-content p {
    color: var(--text-dim);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.view-link {
    display: inline-block;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.view-link:hover {
    color: #a78bfa;
}

.card-play-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px; /* ikon ile yazı arası boşluk */
    padding: 10px 24px;
    font-size: 1rem;
    background: #0082c9;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
}

.card-play-btn:hover {
    background: #005fa3;
    color: #fff;
}

.card-play-btn:active {
    transform: scale(0.98);
}

/* Butonun normal ve hover durumunda SVG fill rengi sabit */
.card-play-btn svg {
    width: 24px;
    height: 24px;
    fill: #fff;
    flex-shrink: 0;
    transition: fill 0.2s;
}

.card-play-btn:hover svg {
    fill: #fff;
}

/* ─── Player Overlay ────────────────────────── */
.player-wrapper {
    position: fixed;
    inset: 0;
    z-index: 2147483647;
    /* Max 32-bit int → menü, sticky, WhatsApp vb. hepsinin üstü */
    background: rgba(8, 15, 30, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    transition: opacity var(--transition-base);
    will-change: opacity;
}

.player-wrapper.hidden {
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    /* visibility: hidden; → erişilebilirlik ve paint atlatma */
}

/* ─── Player Container ──────────────────────── */
.player-container {
    position: relative;
    width: 100%;
    max-width: 380px;
    padding: 2rem;
    background: var(--player-bg);
    border: 1px solid var(--card-border);
    border-radius: 28px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
    contain: layout style;

    /* Açılış animasyonu: sadece transform + opacity */
    transition: transform var(--transition-base);
}

.player-wrapper.hidden .player-container {
    transform: translateY(12px) scale(0.97);
}

/* ─── Album Art ─────────────────────────────── */
.album-art {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 16px;
    margin-bottom: 1.5rem;
    overflow: visible;
    /* Butonun taşmasına izin ver */
    background: linear-gradient(135deg, #312e81 0%, #6d28d9 100%);
    position: relative;
    /* close-player için konum başvurusu */
}

.album-art img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 16px;
}

/* ─── Brand / Track ─────────────────────────── */
.brand-name {
    text-align: center;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.track-info {
    text-align: center;
    margin-bottom: 1.5rem;
}

.track-name {
    font-size: 1.05rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--track-name);
}

/* ─── Controls ──────────────────────────────── */
.controls {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.play-pause-btn {
    width: 66px;
    height: 66px;
    background: var(--primary);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast), transform var(--transition-fast);
    will-change: transform;
}

.play-pause-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.08);
}

.play-pause-btn:active {
    transform: scale(0.94);
}

.play-pause-btn svg {
    width: 28px;
    height: 28px;
}

/* ─── Progress ──────────────────────────────── */
.progress-container {
    width: 100%;
}

.progress-bar {
    width: 100%;
    height: 5px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    cursor: pointer;
    position: relative;
    margin-bottom: 0.6rem;
    /* Geniş tıklama alanı için padding trick */
}

.progress-bar::before {
    content: '';
    position: absolute;
    inset: -8px 0;
    /* Parmak dostu geniş tıklama alanı, görünmez */
}

.progress-current {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    /* scaleX(0..1) için tam genişlikte olmalı */
    background: var(--primary);
    border-radius: 10px;
    transform: scaleX(0);
    /* Başlangıç: görünmez */
    transform-origin: left center;
    transition: none;
    /* JS rAF ile frame-by-frame güncellenir */
}

.time-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: var(--text-dim);
    font-variant-numeric: tabular-nums;
}

/* ─── Close Button ──────────────────────────── */
.close-player {
    position: absolute;
    top: 0.6rem;
    right: 0.6rem;
    z-index: 10;
    /* Resmin üzerinde */
    background: #f97316;
    border: none;
    color: #fff;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background var(--transition-fast), transform var(--transition-fast);
    flex-shrink: 0;
}

.close-player:hover {
    background: #ea6a00;
    transform: rotate(90deg) scale(1.1);
}

.close-player:active {
    transform: rotate(90deg) scale(0.93);
}

.close-player svg {
    width: 16px;
    height: 16px;
    stroke-width: 2.5;
}

/* ─── Responsive ────────────────────────────── */
@media (max-width: 768px) {
    body {
        padding: 2rem 1rem 4rem;
    }

    header {
        margin-bottom: 2.5rem;
    }

    .training-grid {
        gap: 1rem;
    }

    .training-card {
        padding: 1.25rem;
    }

    .play-pause-btn {
        width: 58px;
        height: 58px;
    }
}

@media (max-width: 480px) {
    .training-grid {
        grid-template-columns: 1fr;
    }

    .player-container {
        padding: 1.5rem;
        border-radius: 20px;
    }
}

/* ─── prefers-reduced-motion ────────────────── */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        transition-duration: 0ms !important;
        animation-duration: 0ms !important;
    }
}