/* CSS Custom Properties für Wald-Theme */
:root {
    --forest-green: #2d5016;
    --light-green: #4a7c59;
    --sage-green: #87a96b;
    --cream: #f5f5dc;
    --earth-brown: #8b4513;
    --sky-blue: #87ceeb;
    --white: #ffffff;
    --text-dark: #2c3e2d;
    --shadow: rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--sage-green) 0%, var(--light-green) 100%);
    color: var(--text-dark);
    min-height: 100vh;
    line-height: 1.6;
}

#app {
    max-width: 400px;
    margin: 0 auto;
    background: var(--white);
    min-height: 100vh;
    box-shadow: 0 0 20px var(--shadow);
    overflow: hidden;
}

/* Header */
.header {
    background: var(--forest-green);
    color: var(--white);
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo h1 {
    font-size: 24px;
    font-weight: 700;
}

.tree-icon {
    font-size: 28px;
}

.user-stats {
    display: flex;
    gap: 15px;
    font-size: 14px;
}

.user-stats span {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Navigation */
.nav-tabs {
    background: var(--white);
    display: flex;
    border-bottom: 1px solid #eee;
    overflow-x: auto;
}

.tab-btn {
    flex: 1;
    padding: 15px 10px;
    border: none;
    background: none;
    color: var(--text-dark);
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
}

.tab-btn:hover {
    background: #f8f9fa;
}

.tab-btn.active {
    color: var(--forest-green);
    border-bottom-color: var(--forest-green);
    font-weight: 600;
}

/* Tab Content */
.tab-content {
    display: none;
    padding: 20px;
    min-height: calc(100vh - 140px);
}

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

/* Dashboard */
.welcome-card {
    background: linear-gradient(135deg, var(--cream), #ffffff);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 20px;
    text-align: center;
}

.welcome-card h2 {
    color: var(--forest-green);
    margin-bottom: 10px;
}

.mood-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 15px;
}

.mood-btn {
    padding: 12px;
    border: 2px solid #eee;
    border-radius: var(--border-radius);
    background: var(--white);
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
}

.mood-btn:hover {
    border-color: var(--sage-green);
    background: #f8f9fa;
}

.mood-btn.selected {
    border-color: var(--forest-green);
    background: var(--sage-green);
    color: var(--white);
}

/* Daily Recommendation */
.daily-recommendation {
    margin-bottom: 25px;
}

.daily-recommendation h3 {
    color: var(--forest-green);
    margin-bottom: 15px;
    font-size: 18px;
}

.rec-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 4px 12px var(--shadow);
    border: 1px solid #f0f0f0;
}

.rec-icon {
    font-size: 32px;
    min-width: 50px;
}

.rec-content {
    flex: 1;
}

.rec-content h4 {
    color: var(--forest-green);
    margin-bottom: 5px;
    font-size: 16px;
}

.rec-content p {
    color: #666;
    font-size: 14px;
}

.start-btn {
    background: var(--forest-green);
    color: var(--white);
    border: none;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
}

.start-btn:hover {
    background: var(--light-green);
    transform: translateY(-2px);
}

/* Quick Actions */
.quick-actions h3 {
    color: var(--forest-green);
    margin-bottom: 15px;
    font-size: 18px;
}

.action-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.action-btn {
    background: var(--white);
    border: 2px solid #eee;
    border-radius: var(--border-radius);
    padding: 20px 15px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.action-btn:hover {
    border-color: var(--sage-green);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.action-icon {
    font-size: 28px;
}

.action-btn span:last-child {
    font-size: 14px;
    color: var(--text-dark);
    font-weight: 500;
}

/* Meditation Tab */
.meditation-header {
    text-align: center;
    margin-bottom: 25px;
}

.meditation-header h2 {
    color: var(--forest-green);
    margin-bottom: 5px;
}

.meditation-header p {
    color: #666;
}

.meditation-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.meditation-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: 0 4px 12px var(--shadow);
    border: 2px solid transparent;
    transition: var(--transition);
}

.meditation-card.featured {
    border-color: var(--forest-green);
    background: linear-gradient(135deg, var(--cream), var(--white));
}

.meditation-card h3 {
    color: var(--forest-green);
    margin-bottom: 10px;
}

.duration {
    background: var(--sage-green);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.meditation-card p {
    color: #666;
    margin: 10px 0;
    font-size: 14px;
}

.start-meditation {
    background: var(--forest-green);
    color: var(--white);
    border: none;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    width: 100%;
    margin-top: 10px;
}

.start-meditation:hover {
    background: var(--light-green);
}

/* Breathing Tab */
.breathing-header {
    text-align: center;
    margin-bottom: 25px;
}

.breathing-header h2 {
    color: var(--forest-green);
    margin-bottom: 5px;
}

.tree-breathing {
    text-align: center;
    background: linear-gradient(135deg, var(--cream), var(--white));
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 20px;
}

.tree-visual {
    font-size: 80px;
    margin: 20px 0;
    transition: var(--transition);
    display: inline-block;
}

.tree-visual.breathing-in {
    transform: scale(1.2);
}

.tree-visual.breathing-out {
    transform: scale(0.9);
}

.breathing-instructions h3 {
    color: var(--forest-green);
    margin-bottom: 10px;
}

.breathing-instructions p {
    color: #666;
    margin-bottom: 20px;
}

.breathing-controls {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.breathing-btn {
    padding: 12px 20px;
    border: 2px solid var(--sage-green);
    border-radius: var(--border-radius);
    background: var(--white);
    color: var(--forest-green);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.breathing-btn.primary {
    background: var(--forest-green);
    color: var(--white);
    border-color: var(--forest-green);
}

.breathing-btn:hover {
    background: var(--sage-green);
    color: var(--white);
}

.breathing-options {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: 0 4px 12px var(--shadow);
}

.breathing-options h4 {
    color: var(--forest-green);
    margin-bottom: 15px;
}

.technique-selector {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.technique-btn {
    padding: 12px;
    border: 2px solid #eee;
    border-radius: var(--border-radius);
    background: var(--white);
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.technique-btn.active {
    border-color: var(--forest-green);
    background: var(--sage-green);
    color: var(--white);
}

.technique-btn:hover {
    border-color: var(--sage-green);
}

/* Forest Tab */
.forest-header {
    text-align: center;
    margin-bottom: 25px;
}

.forest-header h2 {
    color: var(--forest-green);
    margin-bottom: 5px;
}

.forest-stats {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 25px;
}

.stat-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 4px 12px var(--shadow);
}

.stat-icon {
    font-size: 32px;
    min-width: 50px;
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--forest-green);
}

.stat-label {
    font-size: 14px;
    color: #666;
}

.forest-visualization {
    background: linear-gradient(135deg, var(--cream), var(--white));
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: 0 4px 12px var(--shadow);
}

.forest-ground {
    min-height: 120px;
    background: linear-gradient(to bottom, transparent 70%, #8b4513 70%);
    border-radius: var(--border-radius);
    position: relative;
    margin-bottom: 20px;
}

.forest-trees {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    padding: 10px;
    min-height: 100px;
    align-items: flex-end;
}

.forest-tree {
    font-size: 24px;
    animation: growTree 0.6s ease-out;
}

@keyframes growTree {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.forest-info h3 {
    color: var(--forest-green);
    margin-bottom: 10px;
}

.progress-bar {
    background: #eee;
    border-radius: 10px;
    height: 10px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    background: linear-gradient(90deg, var(--sage-green), var(--forest-green));
    height: 100%;
    transition: width 0.6s ease;
}

.forest-info p {
    color: #666;
    font-size: 14px;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 0;
    max-width: 350px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.session-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid #eee;
}

.session-header h3 {
    color: var(--forest-green);
}

.close-modal {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #999;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.meditation-session {
    text-align: center;
}

.timer-display {
    padding: 40px 20px;
}

.timer-circle {
    width: 200px;
    height: 200px;
    border: 8px solid var(--sage-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    background: linear-gradient(135deg, var(--cream), var(--white));
}

#timer-display {
    font-size: 36px;
    font-weight: 700;
    color: var(--forest-green);
}

.session-controls {
    padding: 20px;
    display: flex;
    gap: 15px;
    justify-content: center;
}

.control-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: none;
    background: var(--forest-green);
    color: var(--white);
    cursor: pointer;
    transition: var(--transition);
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn:hover {
    background: var(--light-green);
    transform: scale(1.1);
}

.ambient-sound {
    padding: 0 20px 20px;
    color: #666;
    font-size: 14px;
}

/* Completion Modal */
.completion-celebration {
    text-align: center;
    padding: 30px;
}

.completion-celebration h2 {
    color: var(--forest-green);
    margin-bottom: 20px;
}

.tree-reward {
    font-size: 80px;
    margin: 20px 0;
    animation: celebration 0.8s ease-in-out;
}

@keyframes celebration {
    0%, 100% { transform: scale(1) rotate(0deg); }
    25% { transform: scale(1.2) rotate(-5deg); }
    75% { transform: scale(1.2) rotate(5deg); }
}

.completion-celebration p {
    color: #666;
    margin-bottom: 25px;
    font-size: 16px;
}

.mood-check h4 {
    color: var(--forest-green);
    margin-bottom: 15px;
}

.mood-after {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 25px;
}

.mood-after-btn {
    padding: 12px;
    border: 2px solid #eee;
    border-radius: var(--border-radius);
    background: var(--white);
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
}

.mood-after-btn:hover {
    border-color: var(--sage-green);
    background: #f8f9fa;
}

.mood-after-btn.selected {
    border-color: var(--forest-green);
    background: var(--sage-green);
    color: var(--white);
}

.primary-btn {
    background: var(--forest-green);
    color: var(--white);
    border: none;
    padding: 15px 30px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-size: 16px;
}

.primary-btn:hover {
    background: var(--light-green);
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 480px) {
    #app {
        max-width: 100%;
    }
    
    .header {
        padding: 15px;
    }
    
    .tab-content {
        padding: 15px;
    }
    
    .timer-circle {
        width: 160px;
        height: 160px;
    }
    
    #timer-display {
        font-size: 28px;
    }
    
    .tree-visual {
        font-size: 60px;
    }
}

/* PWA Specific */
@media (display-mode: standalone) {
    .header {
        padding-top: env(safe-area-inset-top, 20px);
    }
}