/* =========================================
   Zen Timer - 禪意計時器樣式
   ========================================= */

/* ---------- CSS Variables ---------- */
:root {
    /* Colors */
    --zen-cream: #F5F1EB;
    --zen-beige: #E8E0D5;
    --zen-sand: #D4C4B0;
    --zen-brown: #8B7355;
    --zen-dark-brown: #5C4A3D;
    --zen-forest: #4A5548;
    --zen-ink: #2C3E2D;
    --zen-white: #FDFCFA;

    /* Typography */
    --font-primary: 'Noto Sans TC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-timer: 'Inter', 'Noto Sans TC', monospace;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s ease;

    /* Shadows */
    --shadow-soft: 0 4px 20px rgba(92, 74, 61, 0.08);
    --shadow-hover: 0 8px 30px rgba(92, 74, 61, 0.12);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--zen-cream);
    background-image: url('zen-background.png');
    background-size: cover;
    background-attachment: fixed;
    background-position: center;
    color: var(--zen-ink);
    line-height: 1.7;
    min-height: 100vh;
}

/* ---------- Layout ---------- */
.site-wrapper {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xs) var(--spacing-md) var(--spacing-md);
}

/* ---------- Ad Slots ---------- */
.ad-slot {
    width: 100%;
    margin: var(--spacing-md) 0;
    text-align: center;
    min-height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 8px;
}

/* ---------- Header ---------- */
.site-header {
    text-align: center;
    padding: var(--spacing-sm) 0;
}

.site-title {
    font-size: 1.6rem;
    font-weight: 300;
    color: var(--zen-forest);
    letter-spacing: 0.1em;
    margin-bottom: 4px;
}

.site-subtitle {
    font-size: 0.95rem;
    color: var(--zen-brown);
    font-weight: 400;
}

/* ---------- Timer Container ---------- */
.timer-container {
    background: var(--zen-white);
    border-radius: 20px;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-soft);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.timer-container.compact {
    padding: var(--spacing-md);
}

/* ---------- Timer Ring ---------- */
.timer-ring-container {
    position: relative;
    width: 220px;
    height: 220px;
    margin: 0 auto var(--spacing-sm);
}

.compact .timer-ring-container {
    width: 200px;
    height: 200px;
}

.timer-ring-svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.timer-ring-bg {
    fill: none;
    stroke: var(--zen-beige);
    stroke-width: 8;
}

.timer-ring-progress {
    fill: none;
    stroke: var(--zen-forest);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 754;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 0.5s linear;
}

.timer-display {
    position: absolute;
    top: 42%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-timer);
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--zen-ink);
    letter-spacing: 0.02em;
    z-index: 10;
}

.compact .timer-display {
    font-size: 2.3rem;
}

/* ---------- Time Input ---------- */
.time-input-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.time-input-group label {
    color: var(--zen-brown);
    font-size: 0.9rem;
}

.time-input-group input {
    width: 100px;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 2px solid var(--zen-sand);
    border-radius: 8px;
    font-size: 1.1rem;
    text-align: center;
    font-family: var(--font-timer);
    background: var(--zen-white);
    color: var(--zen-ink);
    transition: var(--transition-fast);
}

.time-input-group input:focus {
    outline: none;
    border-color: var(--zen-forest);
}

/* ---------- Tree Icon (V2) ---------- */
.tree-icon-container {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 80px;
    z-index: 5;
}

.tree-icon {
    position: absolute;
    top: 0;
    left: 0;
    width: 80px;
    height: 80px;
    object-fit: contain;
    opacity: 0;
    transition: opacity 1s ease;
    transform-origin: bottom center;
}

.tree-icon.preview {
    opacity: 0.6;
}

.tree-icon.active {
    opacity: 1;
    animation: treeBreatheSway 6s ease-in-out infinite;
}

/* Gentle sway + breathing animation (meditation pace) - Anchored at bottom */
@keyframes treeBreatheSway {

    0%,
    100% {
        transform: scale(1) rotate(0deg);
    }

    25% {
        transform: scale(1.02) rotate(1deg);
    }

    50% {
        transform: scale(0.98) rotate(0deg);
    }

    75% {
        transform: scale(1.02) rotate(-1deg);
    }
}

.tree-icon.growing {
    animation: treeGrow 0.5s ease-out;
}


.tree-icon.complete {
    animation: treeCelebrate 0.6s ease-in-out 2;
}

@keyframes treeGrow {
    0% {
        transform: scale(0.8);
        opacity: 0;
    }

    50% {
        transform: scale(1.1);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes treeCelebrate {

    0%,
    100% {
        transform: scale(1) rotate(0deg);
    }

    25% {
        transform: scale(1.1) rotate(-5deg);
    }

    75% {
        transform: scale(1.1) rotate(5deg);
    }
}

/* ---------- Preset Buttons ---------- */
.preset-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.preset-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--zen-sand);
    background: transparent;
    color: var(--zen-brown);
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.preset-btn:hover {
    background: var(--zen-sand);
    color: var(--zen-dark-brown);
}

.preset-btn.active {
    background: var(--zen-forest);
    color: var(--zen-white);
    border-color: var(--zen-forest);
}

/* ---------- Control Buttons ---------- */
.controls {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    min-width: 100px;
}

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

.btn-start {
    background: var(--zen-forest);
    color: var(--zen-white);
}

.btn-start:hover {
    background: var(--zen-ink);
}

.btn-pause {
    background: var(--zen-sand);
    color: var(--zen-dark-brown);
}

.btn-pause:hover {
    background: var(--zen-brown);
    color: var(--zen-white);
}

.btn-reset {
    background: transparent;
    border: 2px solid var(--zen-sand);
    color: var(--zen-brown);
}

.btn-reset:hover {
    background: var(--zen-beige);
}

.btn-stop-alarm {
    background: #C17767;
    color: var(--zen-white);
    display: none;
}

.btn-stop-alarm:hover {
    background: #A65D4E;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ---------- Status Display ---------- */
.status-display {
    margin-top: var(--spacing-md);
    font-size: 0.95rem;
    color: var(--zen-brown);
    min-height: 1.5em;
}

/* ---------- Stats Section ---------- */
.stats-section {
    background: linear-gradient(135deg, var(--zen-sand) 0%, var(--zen-brown) 100%);
    border-radius: 12px;
    padding: var(--spacing-sm);
    color: var(--zen-white);
    margin-top: var(--spacing-sm);
}

.stats-title {
    text-align: center;
    font-size: 0.9rem;
    font-weight: 400;
    margin-bottom: var(--spacing-xs);
    opacity: 0.95;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.stat-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: var(--spacing-sm);
    text-align: center;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 600;
    font-family: var(--font-timer);
}

.stat-label {
    font-size: 0.75rem;
    opacity: 0.8;
    margin-top: 4px;
}

.reset-stats-btn {
    display: block;
    margin: var(--spacing-sm) auto 0;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--zen-white);
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.reset-stats-btn:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* ---------- Section Container ---------- */
.section {
    background: var(--zen-white);
    border-radius: 16px;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-soft);
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--zen-forest);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--zen-beige);
}

/* ---------- Quick Tools ---------- */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-sm);
}

.tool-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--zen-cream);
    border-radius: 12px;
    text-decoration: none;
    color: var(--zen-ink);
    transition: var(--transition-fast);
    border: 1px solid transparent;
}

.tool-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    border-color: var(--zen-sand);
}

.tool-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.tool-name {
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
}

.tool-desc {
    font-size: 0.75rem;
    color: var(--zen-brown);
    text-align: center;
    margin-top: 4px;
}

/* ---------- Method Cards ---------- */
.method-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.method-card {
    background: var(--zen-cream);
    border-radius: 12px;
    padding: var(--spacing-md);
    border-left: 4px solid var(--zen-forest);
}

.method-card h4 {
    font-size: 1rem;
    color: var(--zen-forest);
    margin-bottom: var(--spacing-xs);
}

.method-card p {
    font-size: 0.85rem;
    color: var(--zen-dark-brown);
    margin-bottom: var(--spacing-xs);
}

.method-card ul {
    padding-left: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--zen-dark-brown);
}

.method-card li {
    margin-bottom: 4px;
}

/* ---------- Music Cards ---------- */
.music-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-sm);
}

.music-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-sm);
    background: var(--zen-cream);
    border-radius: 12px;
    text-decoration: none;
    color: var(--zen-ink);
    transition: var(--transition-fast);
    border: 1px solid transparent;
}

.music-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    border-color: var(--zen-sand);
    background: var(--zen-beige);
}

.music-icon {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-xs);
}

.music-name {
    font-size: 0.85rem;
    font-weight: 500;
    text-align: center;
    color: var(--zen-dark-brown);
}

/* ---------- Music Links (Legacy) ---------- */
.music-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.music-category h4 {
    font-size: 0.95rem;
    color: var(--zen-forest);
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.music-link {
    display: block;
    padding: var(--spacing-xs) 0;
    color: var(--zen-brown);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.music-link:hover {
    color: var(--zen-forest);
    padding-left: var(--spacing-xs);
}

.music-link::before {
    content: '♪ ';
    opacity: 0.5;
}

/* ---------- Resources Section ---------- */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.resource-category {
    background: var(--zen-cream);
    border-radius: 12px;
    padding: var(--spacing-md);
    border-left: 4px solid var(--zen-brown);
}

.resource-category h4 {
    font-size: 1rem;
    color: var(--zen-forest);
    margin-bottom: var(--spacing-sm);
}

.resource-category ul {
    list-style: none;
    padding: 0;
}

.resource-category li {
    font-size: 0.85rem;
    color: var(--zen-dark-brown);
    margin-bottom: var(--spacing-xs);
    line-height: 1.5;
}

.resource-category li strong {
    color: var(--zen-ink);
}

.resource-category a {
    color: var(--zen-forest);
    text-decoration: none;
    transition: var(--transition-fast);
}

.resource-category a:hover {
    text-decoration: underline;
}

/* ---------- FAQ Section ---------- */
.faq-item {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--zen-beige);
}

.faq-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.faq-question {
    font-weight: 500;
    color: var(--zen-forest);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.faq-answer {
    color: var(--zen-dark-brown);
    font-size: 0.9rem;
}

/* ---------- Collapsible ---------- */
.collapsible-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    padding: var(--spacing-sm) 0;
}

.collapsible-header::after {
    content: '▼';
    font-size: 0.7rem;
    color: var(--zen-brown);
    transition: var(--transition-fast);
}

.collapsible-header.active::after {
    transform: rotate(180deg);
}

.collapsible-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.collapsible-content.show {
    max-height: 2000px;
}

/* ---------- Footer ---------- */
.site-footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--zen-brown);
    font-size: 0.85rem;
}

.footer-links {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--zen-forest);
    text-decoration: none;
    margin: 0 var(--spacing-sm);
    transition: var(--transition-fast);
}

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

/* Language Switch Button */
.lang-switch-btn {
    background: transparent;
    border: 1px solid var(--zen-sand);
    color: var(--zen-brown);
    padding: 4px 12px;
    margin-left: var(--spacing-sm);
    border-radius: 4px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.lang-switch-btn:hover {
    background: var(--zen-sand);
    color: var(--zen-dark-brown);
}

.copyright {
    opacity: 0.7;
}

/* ---------- Feature Controls ---------- */
.feature-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.white-noise-panel {
    display: flex;
    gap: var(--spacing-xs);
}

.feature-btn {
    background: var(--zen-cream);
    border: 1px solid var(--zen-sand);
    color: var(--zen-brown);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.feature-btn:hover {
    background: var(--zen-sand);
    color: var(--zen-dark-brown);
}

.feature-btn.active {
    background: var(--zen-forest);
    color: var(--zen-white);
    border-color: var(--zen-forest);
}

.feature-btn-stop {
    background: #C17767;
    color: var(--zen-white);
    border-color: #C17767;
}

.feature-btn-stop:hover {
    background: #A65D4E;
}

/* ---------- Breathing Mode ---------- */
.breathing-hint {
    text-align: center;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    background: var(--zen-cream);
    border-radius: 12px;
    border: 1px dashed var(--zen-sand);
}

.breathing-hint span {
    display: block;
    font-size: 0.85rem;
    color: var(--zen-brown);
    margin-bottom: var(--spacing-xs);
}

.breathing-stop-btn {
    background: var(--zen-sand);
    border: none;
    color: var(--zen-dark-brown);
    padding: 6px 16px;
    border-radius: 16px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.breathing-stop-btn:hover {
    background: var(--zen-brown);
    color: var(--zen-white);
}

/* Breathing Mode Animation (larger, slower) */
.tree-icon.breathing-mode {
    animation: treeDeepBreathing 6s ease-in-out infinite !important;
}

@keyframes treeDeepBreathing {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.15);
    }
}

/* ---------- Feature Sections ---------- */
.feature-section {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--zen-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-soft);
}

.section-desc {
    color: var(--zen-brown);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
    text-align: left;
}

/* White Noise Section */
.noise-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.noise-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--zen-cream);
    border: 2px solid var(--zen-sand);
    border-radius: 16px;
    cursor: pointer;
    transition: var(--transition-fast);
    min-width: 100px;
}

.noise-btn:hover {
    background: var(--zen-sand);
    transform: translateY(-2px);
}

.noise-btn.active {
    background: var(--zen-forest);
    border-color: var(--zen-forest);
    color: var(--zen-white);
}

.noise-icon {
    font-size: 2rem;
}

.noise-label {
    font-size: 0.85rem;
    font-weight: 500;
}

.stop-noise-btn {
    background: #C17767;
    color: var(--zen-white);
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.stop-noise-btn:hover {
    background: #A65D4E;
}

.stop-btn-container {
    text-align: center;
    margin-top: var(--spacing-sm);
}

/* Volume Control */
.volume-control {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.volume-control label {
    color: var(--zen-brown);
    font-size: 0.9rem;
}

.volume-control input[type="range"] {
    width: 150px;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--zen-sand);
    border-radius: 3px;
    outline: none;
}

.volume-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--zen-forest);
    border-radius: 50%;
    cursor: pointer;
}

.volume-control input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--zen-forest);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* Breathing Exercise Section */
/* Breathing Display Container */
.breathing-display {
    text-align: center;
    margin: 0 auto var(--spacing-md);
}

.breathing-tree-active {
    position: relative;
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-sm);
}

.breathing-tree-active .breathing-tree {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0;
    transition: opacity 1s ease;
    transform-origin: bottom center;
}

.breathing-tree-active .breathing-tree.active {
    opacity: 1;
    animation: breathingTreeSway 6s ease-in-out infinite;
}

/* Gentle sway + breathing animation (anchored at bottom) */
@keyframes breathingTreeSway {

    0%,
    100% {
        transform: scale(1) rotate(0deg);
    }

    25% {
        transform: scale(1.02) rotate(1deg);
    }

    50% {
        transform: scale(0.98) rotate(0deg);
    }

    75% {
        transform: scale(1.02) rotate(-1deg);
    }
}

.breathing-text-display {
    text-align: center;
}

.breathing-text-display .breathing-phase {
    font-size: 1.2rem;
    color: var(--zen-forest);
    margin-bottom: var(--spacing-xs);
    transition: color 0.5s ease;
}

.breathing-text-display .breathing-phase.exhale {
    color: var(--zen-terracotta);
}

/* Breathing Pulse Animation Removed - simple text display */
.breathing-countdown.breathing-pulse {
    font-size: 2.5rem;
    font-weight: 300;
    font-family: var(--font-timer);
    color: var(--zen-ink);
    /* animation removed */
}


.breathing-tree-inner .breathing-tree {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.breathing-tree-inner .breathing-tree.active {
    opacity: 1;
}

.breathing-countdown-display {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
}

.breathing-countdown-display .breathing-phase {
    font-size: 0.85rem;
    color: var(--zen-forest);
    margin-bottom: 2px;
}

.breathing-countdown-display .breathing-countdown {
    font-size: 1.8rem;
    font-weight: 300;
    font-family: var(--font-timer);
    color: var(--zen-ink);
}

/* Tree Preview (before start) */
.breathing-tree-preview {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-md);
}

.breathing-tree-preview-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0.6;
}

/* Legacy styles for compatibility */
.breathing-tree-container {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-md);
}

.breathing-tree {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.breathing-tree.active {
    opacity: 1;
}

@keyframes breathingTreeAnimation {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.2);
    }
}

.breathing-status {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.breathing-phase {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--zen-forest);
    margin-bottom: var(--spacing-xs);
}

.breathing-countdown {
    font-size: 2.5rem;
    font-weight: 300;
    font-family: var(--font-timer);
    color: var(--zen-ink);
}

.breathing-cycles {
    font-size: 0.85rem;
    color: var(--zen-brown);
    margin-top: var(--spacing-sm);
}

.breathing-setup {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.breathing-timing-row,
.breathing-duration-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.breathing-input-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    white-space: nowrap;
}

.breathing-setup label {
    color: var(--zen-brown);
    font-size: 0.9rem;
}

.breathing-setup select {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 2px solid var(--zen-sand);
    border-radius: 8px;
    font-size: 0.9rem;
    background: var(--zen-white);
    color: var(--zen-ink);
    cursor: pointer;
}

.breathing-start-btn {
    padding: var(--spacing-sm) var(--spacing-lg) !important;
    margin-top: var(--spacing-xs);
}

.breathing-end-btn {
    margin-top: var(--spacing-sm);
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
    .site-title {
        font-size: 1.5rem;
    }

    .timer-ring-container {
        width: 240px;
        height: 240px;
    }

    .timer-display {
        font-size: 2.8rem;
    }

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

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

    .btn {
        min-width: 80px;
        padding: var(--spacing-xs) var(--spacing-md);
    }

    /* Mobile Breathing Setup Alignment */
    .breathing-timing-row,
    .breathing-duration-row {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .breathing-input-group {
        width: 260px;
        /* Fixed width to ensure centering consistency */
        display: grid;
        grid-template-columns: 110px 1fr;
        /* Fixed label width, flexible input */
        gap: var(--spacing-sm);
        align-items: center;
    }

    .breathing-input-group label {
        text-align: right;
        margin: 0;
        /* Removing potential default margins */
        justify-self: end;
    }

    .breathing-input-group select {
        width: 100%;
        text-align: left;
    }
}

/* ---------- Animations ---------- */
@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

.timer-active .timer-display {
    animation: pulse 2s ease-in-out infinite;
}