:root {
    --bg-primary: #0e0d16;      /* Mystic cosmos background */
    --card-bg: rgba(22, 20, 36, 0.65); /* Semi-transparent amethyst glass */
    --border-color: rgba(182, 108, 216, 0.15); /* Subtle glowing violet border */
    --border-hover: rgba(182, 108, 216, 0.45); /* Glowing violet border hover */
    --text-primary: #f5efff;     /* Glowing soft white text */
    --text-secondary: #b3aabf;   /* Muted warm lavender text */
    --accent-gold: #ffd075;      /* Glowing cosmic gold */
    --accent-gold-hover: #ffe2a3;/* Lighter star gold on hover */
    --accent-silver: #8f8ba8;
    --radius-lg: 16px;
    --radius-md: 8px;
    --font-sans: 'Inter', sans-serif;
    --font-serif: 'Playfair Display', serif;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background-image: 
        radial-gradient(at 0% 0%, rgba(139, 92, 246, 0.16) 0px, transparent 40%),
        radial-gradient(at 100% 100%, rgba(236, 72, 153, 0.12) 0px, transparent 40%),
        radial-gradient(at 50% 50%, rgba(245, 158, 11, 0.04) 0px, transparent 50%);
}

/* ─── HEADER ─────────────────────────────────────────────────────────────── */
header {
    padding: 15px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    background: rgba(9, 8, 14, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 600;
    font-size: 1.6rem;
    letter-spacing: 2px;
    color: var(--text-primary);
}

.logo-svg {
    width: 28px;
    height: 28px;
    color: var(--accent-gold);
    flex-shrink: 0;
}

.logo .accent {
    color: var(--accent-gold);
    font-weight: 400;
}

/* ─── CONTAINER LAYOUT ───────────────────────────────────────────────────── */
.main-container {
    max-width: 1200px;
    width: 100%;
    margin: 40px auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 30px;
    flex-grow: 1;
}

/* ─── CARDS ────────────────────────────────────────────────────────── */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 35px;
    margin-bottom: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: var(--transition);
}

.glass-card:hover {
    border-color: var(--border-hover);
    box-shadow: 0 10px 45px rgba(139, 92, 246, 0.08);
}

.section-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-serif);
    font-style: italic;
    letter-spacing: 0.5px;
}

.section-title i {
    color: var(--accent-gold);
}

/* ─── POMODORO TIMER ─────────────────────────────────────────────────────── */
.timer-card {
    text-align: center;
}

.timer-modes {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    background: rgba(22, 20, 36, 0.5);
    border: 1px solid var(--border-color);
    padding: 6px;
    border-radius: 30px;
    display: inline-flex;
}

.mode-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 8px 20px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 20px;
    transition: var(--transition);
}

.mode-btn.active, .mode-btn:hover {
    color: #ffffff;
    background-color: var(--accent-gold);
}

.timer-display {
    font-size: 6rem;
    font-weight: 300;
    letter-spacing: -2px;
    margin: 20px 0;
    font-family: var(--font-sans);
    color: var(--text-primary);
}

.timer-helper {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: -10px;
    margin-bottom: 25px;
    font-style: italic;
    opacity: 0.9;
}

.timer-controls {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.control-btn {
    background-color: transparent;
    border: 1px solid var(--accent-gold);
    color: var(--accent-gold);
    padding: 12px 30px;
    font-size: 0.95rem;
    font-weight: 700;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.control-btn#start-btn {
    background-color: var(--accent-gold);
    color: #ffffff;
}

.control-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.18);
}

.control-btn#start-btn:hover {
    background-color: var(--accent-gold-hover);
}

/* ─── AMBIENT SOUND PLAYER ──────────────────────────────────────────────── */
.sound-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
}

.sound-item {
    display: grid;
    grid-template-columns: 40px 1.2fr 2fr;
    align-items: center;
    background: rgba(22, 20, 36, 0.45);
    padding: 15px 20px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.sound-item:hover {
    background: rgba(42, 38, 64, 0.85);
    border-color: var(--accent-gold);
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.15);
}

/* Rain Active Color Palette */
.sound-item[data-sound="rain"].active {
    background: linear-gradient(135deg, #1b263b 0%, #0d1b2a 100%);
    border-color: #54a0ff;
    box-shadow: 0 4px 20px rgba(84, 160, 255, 0.25);
    color: #ffffff;
}
.sound-item[data-sound="rain"].active .sound-icon {
    color: #54a0ff;
}
.sound-item[data-sound="rain"].active .sound-play-btn {
    background: #54a0ff;
    color: #0d1b2a;
    border-color: #54a0ff;
    box-shadow: 0 0 12px rgba(84, 160, 255, 0.5);
}
.sound-item[data-sound="rain"].active .volume-slider::-webkit-slider-thumb {
    background: #54a0ff;
}

/* Cafe Active Color Palette */
.sound-item[data-sound="cafe"].active {
    background: linear-gradient(135deg, #4e3524 0%, #2e1d11 100%);
    border-color: #f3a152;
    box-shadow: 0 4px 20px rgba(243, 161, 82, 0.25);
    color: #ffffff;
}
.sound-item[data-sound="cafe"].active .sound-icon {
    color: #f3a152;
}
.sound-item[data-sound="cafe"].active .sound-play-btn {
    background: #f3a152;
    color: #2e1d11;
    border-color: #f3a152;
    box-shadow: 0 0 12px rgba(243, 161, 82, 0.5);
}
.sound-item[data-sound="cafe"].active .volume-slider::-webkit-slider-thumb {
    background: #f3a152;
}

/* Waves Active Color Palette */
.sound-item[data-sound="waves"].active {
    background: linear-gradient(135deg, #103b4e 0%, #0a2533 100%);
    border-color: #26d0ce;
    box-shadow: 0 4px 20px rgba(38, 208, 206, 0.25);
    color: #ffffff;
}
.sound-item[data-sound="waves"].active .sound-icon {
    color: #26d0ce;
}
.sound-item[data-sound="waves"].active .sound-play-btn {
    background: #26d0ce;
    color: #0a2533;
    border-color: #26d0ce;
    box-shadow: 0 0 12px rgba(38, 208, 206, 0.5);
}
.sound-item[data-sound="waves"].active .volume-slider::-webkit-slider-thumb {
    background: #26d0ce;
}

/* Lo-Fi Active Color Palette */
.sound-item[data-sound="lofi"].active {
    background: linear-gradient(135deg, #3c096c 0%, #240046 100%);
    border-color: #ff9ff3;
    box-shadow: 0 4px 20px rgba(255, 159, 243, 0.25);
    color: #ffffff;
}
.sound-item[data-sound="lofi"].active .sound-icon {
    color: #ff9ff3;
}
.sound-item[data-sound="lofi"].active .sound-play-btn {
    background: #ff9ff3;
    color: #240046;
    border-color: #ff9ff3;
    box-shadow: 0 0 12px rgba(255, 159, 243, 0.5);
}
.sound-item[data-sound="lofi"].active .volume-slider::-webkit-slider-thumb {
    background: #ff9ff3;
}

/* Default themed colors for play buttons */
.sound-item[data-sound="rain"] .sound-play-btn {
    border-color: #54a0ff;
    color: #54a0ff;
    background: rgba(84, 160, 255, 0.08);
}
.sound-item[data-sound="rain"] .sound-play-btn:hover {
    background: rgba(84, 160, 255, 0.18);
    box-shadow: 0 0 8px rgba(84, 160, 255, 0.35);
}

.sound-item[data-sound="cafe"] .sound-play-btn {
    border-color: #f3a152;
    color: #f3a152;
    background: rgba(243, 161, 82, 0.08);
}
.sound-item[data-sound="cafe"] .sound-play-btn:hover {
    background: rgba(243, 161, 82, 0.18);
    box-shadow: 0 0 8px rgba(243, 161, 82, 0.35);
}

.sound-item[data-sound="waves"] .sound-play-btn {
    border-color: #26d0ce;
    color: #26d0ce;
    background: rgba(38, 208, 206, 0.08);
}
.sound-item[data-sound="waves"] .sound-play-btn:hover {
    background: rgba(38, 208, 206, 0.18);
    box-shadow: 0 0 8px rgba(38, 208, 206, 0.35);
}

.sound-item[data-sound="lofi"] .sound-play-btn {
    border-color: #ff9ff3;
    color: #ff9ff3;
    background: rgba(255, 159, 243, 0.08);
}
.sound-item[data-sound="lofi"] .sound-play-btn:hover {
    background: rgba(255, 159, 243, 0.18);
    box-shadow: 0 0 8px rgba(255, 159, 243, 0.35);
}

.sound-play-btn {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    width: 34px;
    height: 34px;
    border-radius: 50%;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    transition: var(--transition);
    padding: 0;
}

.sound-play-btn:hover {
    transform: scale(1.1);
}

.sound-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sound-icon {
    font-size: 1.15rem;
    color: var(--text-secondary);
    transition: var(--transition);
    width: 20px;
}

.volume-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.12);
    outline: none;
    border-radius: 2px;
    transition: var(--transition);
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: var(--text-secondary);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

/* ─── MINDSET / QUOTE CARD ───────────────────────────────────────────────── */
.mindset-card {
    text-align: center;
    border-left: 4px solid var(--accent-gold);
    position: relative;
}

.card-header-badge {
    font-size: 0.72rem;
    letter-spacing: 3px;
    color: var(--accent-gold);
    text-transform: uppercase;
    margin-bottom: 15px;
    font-weight: 700;
}

#quote-text {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-style: italic;
    font-weight: 500;
    line-height: 1.5;
    color: var(--text-primary);
    margin-bottom: 15px;
}

#quote-author {
    font-size: 0.82rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
    display: block;
    margin-bottom: 25px;
}

.promo-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-gold);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
    border-bottom: 1px solid transparent;
    padding-bottom: 2px;
}

.promo-link:hover {
    color: var(--accent-gold-hover);
    border-color: var(--accent-gold-hover);
}

/* ─── TODO CARD ──────────────────────────────────────────────────────────── */
.todo-input-container {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

#todo-input {
    flex-grow: 1;
    background: rgba(22, 20, 36, 0.5);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

#todo-input:focus {
    border-color: var(--accent-gold);
    background: rgba(42, 38, 64, 0.8);
}

#add-todo-btn {
    background: var(--accent-gold);
    color: #ffffff;
    border: none;
    width: 46px;
    height: 46px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1.1rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

#add-todo-btn:hover {
    background: var(--accent-gold-hover);
    transform: scale(1.05);
}

.todo-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 250px;
    overflow-y: auto;
}

.todo-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: rgba(22, 20, 36, 0.45);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.todo-item:hover {
    background: rgba(42, 38, 64, 0.8);
    border-color: var(--accent-gold);
}

.todo-item-text {
    font-size: 0.95rem;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
}

.todo-item-text.completed {
    text-decoration: line-through;
    color: var(--text-secondary);
}

.delete-todo-btn {
    background: transparent;
    border: none;
    color: rgba(230, 225, 214, 0.3);
    cursor: pointer;
    transition: var(--transition);
}

.delete-todo-btn:hover {
    color: #c62828;
}

/* ─── SHOP THE AESTHETIC / MASAÜSTÜ ESTETİĞİ ────────────────────────────── */
.section-subtitle {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    margin-top: -15px;
    letter-spacing: 0.2px;
}

.product-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.product-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 16px 0;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border-color);
    text-decoration: none;
    transition: var(--transition);
}

.product-item:last-child {
    border-bottom: none;
}

.product-item:hover {
    border-bottom-color: var(--accent-gold);
}

.product-img {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    object-fit: cover;
    background-color: #322d25;
    border: 1px solid var(--border-color);
}

.product-details {
    flex-grow: 1;
}

.product-title {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.product-price {
    font-size: 0.82rem;
    color: var(--accent-gold);
    font-weight: 700;
}

.product-arrow {
    color: var(--text-secondary);
    transition: var(--transition);
}

.product-item:hover .product-arrow {
    color: var(--accent-gold);
    transform: translateX(2px);
}

.product-item-placeholder {
    color: var(--text-secondary);
    font-style: italic;
    font-size: 0.9rem;
    text-align: center;
    padding: 20px;
}

/* ─── FOOTER ─────────────────────────────────────────────────────────────── */
footer {
    padding: 40px 20px;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.78rem;
    background: rgba(9, 8, 14, 0.85);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.privacy-note {
    margin-top: 6px;
    opacity: 0.8;
    letter-spacing: 0.5px;
}

/* ─── APP LAYOUT WRAPPER & SKYSCRAPER ADS ────────────────────────────────── */
.app-layout-wrapper {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 30px;
    max-width: 1650px;
    margin: 30px auto;
    padding: 0 20px;
    width: 100%;
    box-sizing: border-box;
}

.main-container {
    flex-grow: 1;
    max-width: 1150px;
    margin: 0;
    width: 100%;
}

.skyscraper-column {
    width: 210px;
    flex-shrink: 0;
    position: sticky;
    top: 30px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-sizing: border-box;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: var(--transition);
}

.skyscraper-column:hover {
    border-color: var(--border-hover);
    box-shadow: 0 10px 45px rgba(139, 92, 246, 0.08);
}

.skyscraper-title {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    margin-bottom: 15px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 8px;
}

.skyscraper-title i {
    color: var(--accent-gold);
}

.skyscraper-items-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.skyscraper-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 10px;
    background: rgba(22, 20, 36, 0.4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: var(--transition);
}

.skyscraper-item:hover {
    border-color: var(--accent-gold);
    background: rgba(42, 38, 64, 0.85);
    transform: translateY(-2px);
}

.skyscraper-item-img {
    width: 100%;
    height: 110px;
    object-fit: cover;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.skyscraper-item-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.3;
}

.skyscraper-item-price {
    font-size: 0.8rem;
    color: var(--accent-gold);
    font-weight: 700;
}

/* ─── RESPONSIVE DESIGN ──────────────────────────────────────────────────── */
@media (max-width: 1350px) {
    .app-layout-wrapper {
        flex-direction: column;
        align-items: center;
        gap: 30px;
        margin: 20px auto;
    }
    .main-container {
        max-width: 1200px;
    }
    .skyscraper-column {
        width: 100%;
        position: static;
        order: 3; /* Render at bottom */
    }
    .skyscraper-items-container {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 20px;
        width: 100%;
    }
    .skyscraper-item-img {
        height: 140px;
    }
}

@media (max-width: 768px) {
    .main-container {
        grid-template-columns: 1fr;
    }
    .logo {
        font-size: 1.4rem;
        letter-spacing: 4px;
    }
    .timer-display {
        font-size: 4.5rem;
    }
    .skyscraper-items-container {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 15px;
    }
    .skyscraper-item-img {
        height: 100px;
    }
}

/* ─── SOUND PRESETS ──────────────────────────────────────────────────────── */
.presets-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.preset-btn {
    background: rgba(22, 20, 36, 0.45);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 12px;
    border-radius: var(--radius-md);
    font-size: 0.82rem;
    font-family: var(--font-sans);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.preset-btn:hover {
    background: rgba(42, 38, 64, 0.85);
    border-color: var(--accent-gold);
    color: var(--text-primary);
}

.preset-btn.active {
    background: var(--accent-gold);
    color: #0e0d16;
    border-color: var(--accent-gold);
    box-shadow: 0 0 12px rgba(255, 208, 117, 0.3);
}

/* ─── FOCUS TRACKER & ACTIVITY GRID ──────────────────────────────────────── */
.tracker-stats {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.tracker-stat-box {
    flex: 1;
    background: rgba(22, 20, 36, 0.45);
    border: 1px solid var(--border-color);
    padding: 12px;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.tracker-stat-val {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.tracker-stat-label {
    font-size: 0.72rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.activity-grid-wrapper {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.activity-grid-title {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.activity-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
}

.activity-day {
    aspect-ratio: 1;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.02);
    transition: var(--transition);
}

.activity-day.active {
    background: var(--accent-gold);
    box-shadow: 0 0 8px rgba(255, 208, 117, 0.4);
}

/* ─── LOFI PLAYER WIDGET ─────────────────────────────────────────────────── */
.lofi-player-container {
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: #000;
    height: 80px;
}