/* sleep-cycle.css — Styles for the Sleep Cycle Calculator tool */

.sleep-container {
    max-width: 800px;
    margin: 0 auto;
}

/* ===== HERO ===== */

.sleep-hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.sleep-moon-icon {
    font-size: 2.8rem;
    display: inline-block;
    animation: moonFloat 3s ease-in-out infinite;
}

@keyframes moonFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-6px) rotate(5deg); }
}

.sleep-subtitle {
    font-size: 1.15rem;
    letter-spacing: 0.5px;
}

/* ===== MODE SELECTOR ===== */

.sleep-mode-selector {
    display: flex;
    border-radius: 16px;
    padding: 6px;
    gap: 4px;
    margin-bottom: 1.5rem;
}

.sleep-mode-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 12px;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.sleep-mode-btn:hover {
    color: var(--text-primary);
    background: var(--glass-hover-bg);
}

.sleep-mode-btn.active {
    background: var(--button-primary-bg);
    color: var(--button-primary-text);
    border: 1px solid var(--button-primary-border);
    box-shadow: 0 2px 12px rgba(59, 130, 246, 0.15);
}

.sleep-mode-btn i {
    font-size: 1rem;
}

/* ===== INPUT SECTION ===== */

.sleep-input-section {
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.sleep-input-row {
    margin-bottom: 1rem;
}

.sleep-time-input {
    font-size: 1.6rem !important;
    font-weight: 700;
    text-align: center;
    letter-spacing: 2px;
    max-width: 240px;
    margin: 0 auto;
    display: block;
}

.sleep-now-message {
    text-align: center;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.sleep-now-message i {
    font-size: 1.4rem;
    color: var(--gradient-text-from);
}

.sleep-current-time {
    font-size: 2.5rem;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    background: linear-gradient(135deg, var(--gradient-text-from) 0%, var(--gradient-text-to) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 2px;
}

/* ===== ADVANCED SETTINGS ===== */

.sleep-advanced-toggle {
    text-align: center;
    margin-bottom: 1rem;
}

.sleep-advanced-panel {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 12px;
    background: var(--glass-subtle-bg);
    border: 1px solid var(--glass-subtle-border);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sleep-calc-action {
    text-align: center;
}

.sleep-calc-btn {
    min-width: 200px;
    font-size: 1.05rem;
    padding: 0.7rem 2rem;
}

/* ===== RESULTS ===== */

.sleep-results {
    margin-bottom: 2rem;
}

.sleep-results-title {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sleep-results-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.sleep-result-card {
    border-radius: 16px;
    padding: 1.25rem;
    text-align: center;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: relative;
    overflow: hidden;
    cursor: default;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    animation: cardAppear 0.4s ease both;
}

.sleep-result-card:nth-child(1) { animation-delay: 0.05s; }
.sleep-result-card:nth-child(2) { animation-delay: 0.12s; }
.sleep-result-card:nth-child(3) { animation-delay: 0.19s; }
.sleep-result-card:nth-child(4) { animation-delay: 0.26s; }

@keyframes cardAppear {
    from {
        opacity: 0;
        transform: translateY(16px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.sleep-result-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.sleep-result-card .card-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: 16px 16px 0 0;
}

.sleep-result-card.level-ideal .card-glow { background: linear-gradient(90deg, #10b981, #34d399); }
.sleep-result-card.level-good .card-glow { background: linear-gradient(90deg, #3b82f6, #60a5fa); }
.sleep-result-card.level-minimum .card-glow { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.sleep-result-card.level-low .card-glow { background: linear-gradient(90deg, #ef4444, #f87171); }

.card-cycles {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    margin-bottom: 0.35rem;
}

.card-time {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 0.25rem;
    font-variant-numeric: tabular-nums;
    letter-spacing: 1px;
}

.level-ideal .card-time { color: #34d399; }
.level-good .card-time { color: #60a5fa; }
.level-minimum .card-time { color: #fbbf24; }
.level-low .card-time { color: #f87171; }

[data-theme="light"] .level-ideal .card-time { color: #059669; }
[data-theme="light"] .level-good .card-time { color: #2563eb; }
[data-theme="light"] .level-minimum .card-time { color: #d97706; }
[data-theme="light"] .level-low .card-time { color: #dc2626; }

.card-duration {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.card-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.level-ideal .card-tag {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.3);
}
.level-good .card-tag {
    background: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.3);
}
.level-minimum .card-tag {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.3);
}
.level-low .card-tag {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

[data-theme="light"] .level-ideal .card-tag {
    background: rgba(5, 150, 105, 0.1);
    color: #047857;
    border-color: rgba(5, 150, 105, 0.3);
}
[data-theme="light"] .level-good .card-tag {
    background: rgba(37, 99, 235, 0.1);
    color: #1d4ed8;
    border-color: rgba(37, 99, 235, 0.3);
}
[data-theme="light"] .level-minimum .card-tag {
    background: rgba(217, 119, 6, 0.1);
    color: #b45309;
    border-color: rgba(217, 119, 6, 0.3);
}
[data-theme="light"] .level-low .card-tag {
    background: rgba(220, 38, 38, 0.1);
    color: #b91c1c;
    border-color: rgba(220, 38, 38, 0.3);
}

/* ===== INFOGRAPHIC ===== */

.sleep-info {
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.sleep-timeline {
    display: flex;
    gap: 0;
    border-radius: 12px;
    overflow: hidden;
    height: auto;
}

.sleep-stage {
    flex: 1;
    display: flex;
    flex-direction: column;
    text-align: center;
    transition: transform 0.2s ease;
    cursor: default;
}

.sleep-stage:hover {
    transform: translateY(-2px);
}

.stage-bar {
    height: 8px;
    width: 100%;
    transition: height 0.3s ease;
}

.sleep-stage:hover .stage-bar {
    height: 12px;
}

.stage-n1 {
    background: linear-gradient(90deg, #818cf8, #a78bfa);
}
.stage-n2 {
    background: linear-gradient(90deg, #6366f1, #818cf8);
}
.stage-n3 {
    background: linear-gradient(90deg, #4338ca, #4f46e5);
}
.stage-rem {
    background: linear-gradient(90deg, #f59e0b, #fbbf24);
}

.stage-info {
    padding: 0.75rem 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.stage-name {
    font-weight: 800;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.stage-label {
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.stage-time {
    font-size: 0.72rem;
    color: var(--text-secondary);
    opacity: 0.7;
}

/* ===== TIPS ===== */

.sleep-tips {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sleep-tip {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.85rem;
    border-radius: 10px;
    background: var(--glass-subtle-bg);
    border: 1px solid var(--glass-subtle-border);
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: background 0.2s ease;
}

.sleep-tip:hover {
    background: var(--glass-hover-bg);
}

.tip-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

/* ===== MOBILE RESPONSIVE ===== */

@media (max-width: 768px) {
    .sleep-hero-title {
        font-size: 1.8rem;
    }

    .sleep-moon-icon {
        font-size: 2rem;
    }

    .sleep-mode-selector {
        flex-direction: column;
    }

    .sleep-mode-btn {
        padding: 0.65rem 1rem;
    }

    .sleep-results-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .card-time {
        font-size: 1.75rem;
    }

    .sleep-timeline {
        flex-direction: column;
        border-radius: 12px;
    }

    .stage-bar {
        height: 6px;
    }

    .sleep-stage:hover .stage-bar {
        height: 8px;
    }

    .sleep-current-time {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .sleep-results-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }

    .sleep-result-card {
        padding: 1rem;
    }

    .card-time {
        font-size: 1.5rem;
    }

    .sleep-time-input {
        font-size: 1.3rem !important;
    }
}