@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
    --bg-dark: #070a13;
    --bg-darker: #04060b;
    --card-bg: rgba(13, 20, 38, 0.55);
    --card-border: rgba(255, 255, 255, 0.07);
    --card-border-hover: rgba(59, 130, 246, 0.4);

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --primary: #6366f1;
    --primary-glow: rgba(99, 102, 241, 0.4);
    --secondary: #3b82f6;
    --secondary-glow: rgba(59, 130, 246, 0.4);
    --accent: #8b5cf6;

    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Outfit', sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Twinkling star canvas container */
#starfield {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    background: radial-gradient(circle at 50% 50%, #0c1226 0%, var(--bg-darker) 100%);
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    position: relative;
    z-index: 1;
}

/* Header Styles */
header {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.logo-container {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.logo-icon {
    font-size: 2.25rem;
    background: linear-gradient(135deg, #a78bfa 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.5));
    animation: float 4s ease-in-out infinite;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    background: linear-gradient(to right, #f8fafc, #cbd5e1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 300;
    margin-top: 0.5rem;
}

/* Floating Animation */
@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-6px);
    }
}

/* Navigation Tabs */
.tabs-navigation {
    display: flex;
    justify-content: center;
    background: rgba(13, 20, 38, 0.4);
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 9999px;
    padding: 0.35rem;
    max-width: 650px;
    margin: 0 auto 3rem auto;
    position: relative;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.75rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
    position: relative;
    z-index: 2;
}

.tab-btn i {
    font-size: 1.1rem;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: #fff;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    box-shadow: 0 4px 15px var(--primary-glow);
}

/* Content Container & Animations */
.tab-content {
    display: none;
    animation: fadeIn var(--transition-normal) forwards;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Card Styling */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.4);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
    border-color: var(--card-border-hover);
}

/* Tab 1: Sleep Calculator Layout */
.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 2rem;
    align-items: start;
}

@media (max-width: 900px) {
    .calculator-grid {
        grid-template-columns: 1fr;
    }
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.calculator-card h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.time-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

input[type="time"] {
    width: 100%;
    background: rgba(8, 12, 24, 0.7);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    font-size: 1.1rem;
    outline: none;
    transition: all var(--transition-fast);
    font-family: inherit;
}

input[type="time"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
    cursor: pointer;
}

input[type="time"]:focus {
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border: none;
    padding: 0.9rem 1.5rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--card-border);
    padding: 0.9rem 1.5rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--text-secondary);
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin: 0.5rem 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.divider:not(:empty)::before {
    margin-right: .5em;
}

.divider:not(:empty)::after {
    margin-left: .5em;
}

/* Results Display */
.results-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    min-height: 250px;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 0.75rem;
}

.results-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.results-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.result-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 1.25rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-fast);
}

.result-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.04);
}

.result-card.best {
    border-color: var(--success);
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.15);
}

.result-card.good {
    border-color: var(--secondary);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.15);
}

.result-card.warning {
    border-color: var(--warning);
}

.result-card.poor {
    border-color: var(--error);
}

.badge {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    border-radius: 99px;
    text-transform: uppercase;
}

.badge.best-badge {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.badge.good-badge {
    background: rgba(59, 130, 246, 0.15);
    color: var(--secondary);
}

.time-val {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0.5rem 0;
    color: var(--text-primary);
}

.cycles-count {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.hours-count {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.results-explanation {
    background: rgba(59, 130, 246, 0.05);
    border-left: 3px solid var(--secondary);
    border-radius: 8px;
    padding: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.results-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    text-align: center;
    flex-grow: 1;
    gap: 1rem;
}

.placeholder-icon {
    font-size: 3rem;
    opacity: 0.5;
}

/* Tab 2: Power Nap Page */
.nap-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 2rem;
}

@media (max-width: 900px) {
    .nap-grid {
        grid-template-columns: 1fr;
    }
}

.nap-options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
}

.nap-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 18px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nap-card:hover {
    border-color: var(--card-border-hover);
    transform: translateY(-3px);
    background: rgba(255, 255, 255, 0.04);
}

.nap-card.selected {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.08);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.15);
}

.nap-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nap-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
}

.nap-duration {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.nap-benefit {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Nap Timer Display */
.timer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.progress-ring-container {
    position: relative;
    width: 220px;
    height: 220px;
    margin-bottom: 1.5rem;
}

.progress-ring {
    transform: rotate(-90deg);
}

.progress-ring__circle-bg {
    stroke: rgba(255, 255, 255, 0.05);
}

.progress-ring__circle {
    stroke: url(#timer-gradient);
    stroke-linecap: round;
    transition: stroke-dashoffset 0.1s linear;
}

.timer-text-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.timer-time {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.timer-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 2px;
}

.timer-controls {
    display: flex;
    gap: 1rem;
    width: 100%;
    max-width: 280px;
}

.timer-controls button {
    flex: 1;
}

/* Tab 3: Sound Synthesizer Grid */
.sounds-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1.5rem;
}

.sound-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    transition: all var(--transition-normal);
}

.sound-card:hover {
    border-color: var(--card-border-hover);
    background: rgba(255, 255, 255, 0.04);
}

.sound-card.playing {
    border-color: var(--accent);
    background: rgba(139, 92, 246, 0.05);
    box-shadow: 0 0 25px rgba(139, 92, 246, 0.15);
}

.sound-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sound-icon-box {
    width: 50px;
    height: 50px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.sound-card.playing .sound-icon-box {
    background: var(--accent);
    color: white;
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.4);
}

.sound-details h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.sound-details p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.volume-control {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.volume-control i {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.volume-slider {
    flex: 1;
    -webkit-appearance: none;
    background: rgba(255, 255, 255, 0.08);
    height: 6px;
    border-radius: 99px;
    outline: none;
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sound-card.playing .volume-slider::-webkit-slider-thumb {
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent);
}

.volume-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.sound-action {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Sound Wave Visualizer Animation */
.wave-animation {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 20px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.sound-card.playing .wave-animation {
    opacity: 1;
}

.wave-bar {
    width: 3px;
    height: 4px;
    background-color: var(--accent);
    border-radius: 99px;
    animation: bounce 0.8s ease-in-out infinite alternate;
}

.wave-bar:nth-child(2) {
    animation-delay: 0.2s;
}

.wave-bar:nth-child(3) {
    animation-delay: 0.4s;
}

.wave-bar:nth-child(4) {
    animation-delay: 0.1s;
}

@keyframes bounce {
    0% {
        height: 4px;
    }

    100% {
        height: 20px;
    }
}

.sound-card button {
    border-radius: 50%;
    width: 44px;
    height: 44px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    border: none;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sound-card button:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: scale(1.05);
}

.sound-card.playing button {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

/* Tab 4: Sleep Tracker Dashboard */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
}

@media (max-width: 900px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 1.25rem;
    text-align: center;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-unit {
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--text-muted);
}

.log-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.rating-selector {
    display: flex;
    justify-content: space-between;
    gap: 0.5rem;
}

.rating-btn {
    flex: 1;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
    border-radius: 12px;
    padding: 0.75rem 0.5rem;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.rating-btn span {
    font-size: 1.25rem;
}

.rating-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

.rating-btn.selected[data-rating="excellent"] {
    background: rgba(16, 185, 129, 0.15);
    border-color: var(--success);
    color: var(--success);
}

.rating-btn.selected[data-rating="good"] {
    background: rgba(59, 130, 246, 0.15);
    border-color: var(--secondary);
    color: var(--secondary);
}

.rating-btn.selected[data-rating="fair"] {
    background: rgba(245, 158, 11, 0.15);
    border-color: var(--warning);
    color: var(--warning);
}

.rating-btn.selected[data-rating="poor"] {
    background: rgba(239, 68, 68, 0.15);
    border-color: var(--error);
    color: var(--error);
}

.chart-container {
    height: 300px;
    position: relative;
    width: 100%;
}

.log-history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 250px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.history-list::-webkit-scrollbar {
    width: 6px;
}

.history-list::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 99px;
}

.history-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 99px;
}

.history-list::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

.history-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 12px;
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.history-date {
    font-size: 0.9rem;
    font-weight: 500;
}

.history-details {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.history-rating {
    font-size: 1.1rem;
}

.btn-delete-log {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.btn-delete-log:hover {
    color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

/* Modal Styling */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(4, 6, 11, 0.8);
    backdrop-filter: blur(8px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background: #0f172a;
    border: 1px solid var(--card-border-hover);
    border-radius: 24px;
    padding: 2.5rem;
    max-width: 450px;
    width: 90%;
    text-align: center;
    box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.8), 0 0 50px rgba(99, 102, 241, 0.15);
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal-card {
    transform: scale(1);
}

.modal-icon {
    font-size: 3.5rem;
    color: var(--warning);
    margin-bottom: 1rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        filter: drop-shadow(0 0 5px rgba(245, 158, 11, 0.5));
    }

    50% {
        transform: scale(1.05);
        filter: drop-shadow(0 0 20px rgba(245, 158, 11, 0.8));
    }

    100% {
        transform: scale(1);
        filter: drop-shadow(0 0 5px rgba(245, 158, 11, 0.5));
    }
}

.modal-card h2 {
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
}

.modal-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.5;
}

/* Footer styling */
footer {
    text-align: center;
    margin-top: 4rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 1.5rem;
}

footer a {
    color: var(--secondary);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Brand & Logo Text Style adjustments */
.logo-text {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #a78bfa 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.4));
}

.seo-main-title {
    font-size: 2.2rem;
    font-weight: 800;
    margin-top: 0.5rem;
    letter-spacing: -0.025em;
    background: linear-gradient(to right, #f8fafc, #cbd5e1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Mobile-Friendly & Responsive Layout Optimizations */
@media (max-width: 650px) {
    .tabs-navigation {
        border-radius: 16px;
        flex-wrap: wrap;
        gap: 6px;
        padding: 0.35rem;
        margin-bottom: 2rem;
    }

    .tab-btn {
        flex: 1 1 calc(50% - 6px);
        /* Two columns layout */
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
        border-radius: 10px;
    }
}

@media (max-width: 480px) {
    .app-container {
        padding: 1rem 0.75rem;
    }

    header {
        margin-bottom: 2rem;
    }

    .logo-text {
        font-size: 1.4rem;
    }

    .seo-main-title {
        font-size: 1.8rem;
    }

    .card {
        padding: 1.25rem;
        border-radius: 18px;
    }

    .calculator-grid,
    .nap-grid,
    .sounds-grid,
    .dashboard-grid {
        gap: 1.25rem;
    }

    .rating-selector {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }

    .rating-btn {
        padding: 0.5rem 0.25rem;
        font-size: 0.8rem;
    }

    .progress-ring-container {
        transform: scale(0.85);
        margin-bottom: 0.5rem;
        height: 190px;
    }

    .sounds-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .seo-content-card {
        margin-top: 2rem !important;
        padding: 1.25rem !important;
    }

    .seo-content-card h2 {
        font-size: 1.5rem !important;
    }

    .seo-content-card h3 {
        font-size: 1.15rem !important;
    }

    .seo-content-card li {
        padding: 0.75rem !important;
    }
}

/* Sticky Feedback Button Styling */
.sticky-feedback-btn {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
    transform-origin: right bottom;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border: none;
    padding: 0.6rem 1.25rem;
    font-weight: 600;
    border-radius: 12px 12px 0 0;
    box-shadow: 0 -4px 15px rgba(99, 102, 241, 0.3);
    z-index: 99;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-right: -1px;
    transition: all var(--transition-fast);
}

.sticky-feedback-btn:hover {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
    padding-bottom: 1.5rem;
    /* Slide out slightly from screen edge */
}

/* Footer Link styling */
.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--secondary);
    text-decoration: underline;
}

/* Modal close button styling */
.btn-close-modal {
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.btn-close-modal:hover {
    transform: scale(1.1);
    color: var(--error) !important;
}

/* Star rating button animations */
.star-btn {
    transition: transform var(--transition-fast);
}

.star-btn:hover {
    transform: scale(1.2);
}