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

:root {
    --primary-color: #4A6FE3;
    --secondary-color: #8A94EC;
    --bg-color: #f8f9fa;
    --text-color: #333;
    --text-secondary: #666;
    --card-bg: #fff;
    --border-color: #e0e0e0;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --text-secondary: #b0b0b0;
    --card-bg: #2d2d2d;
    --border-color: #404040;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.app-container {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
    font-size: 20px;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

/* Screens */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    background: var(--bg-color);
    overflow: hidden;
}

.screen.active {
    transform: translateX(0);
}

/* Headers */
.app-header {
    padding: 20px;
    text-align: center;
    position: relative;
}

.back-btn {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-color);
}

/* Buttons */
.primary-btn, .secondary-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    max-width: 300px;
    margin: 5px auto;
    display: block;
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(74, 111, 227, 0.3);
}

.secondary-btn {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.secondary-btn:hover {
    background: var(--primary-color);
    color: white;
}

/* Welcome Screen */
.welcome-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
    text-align: center;
}

.welcome-content h1 {
    font-size: 3em;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.welcome-content p {
    font-size: 1.2em;
    margin-bottom: 40px;
    color: var(--text-secondary);
}

/* Registry Screen */
.registry-content {
    padding: 20px;
    flex: 1;
    overflow-y: auto;
}

.recent-entries-list {
    max-height: calc(100vh - 300px);
    overflow-y: auto;
    margin-top: 20px;
}

.entry-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 10px;
    transition: transform 0.2s ease;
}

.entry-item:hover {
    transform: translateY(-2px);
}

.entry-date {
    font-size: 0.9em;
    color: var(--text-secondary);
    font-weight: 500;
}

.entry-mood {
    font-weight: 600;
    font-size: 1em;
}

.entry-feelings {
    font-size: 0.85em;
    color: var(--text-secondary);
}

.empty-entries {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

/* Mood Screen */
.mood-content {
    padding: 40px 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.mood-slider-container {
    width: 100%;
    max-width: 400px;
    margin: 40px 0;
}

.mood-slider {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: var(--border-color);
    outline: none;
    margin-bottom: 20px;
}

.mood-value-display {
    text-align: center;
}

.mood-value-display span {
    font-size: 1.5em;
    font-weight: 600;
    color: var(--primary-color);
}

.mood-indicator {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin: 15px auto;
    background: linear-gradient(135deg, #ffa502, #ff7979);
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    border: 2px solid rgba(255,255,255,0.1);
}

/* Feelings Screen */
.feelings-content {
    padding: 20px;
    flex: 1;
    overflow-y: auto;
}

.feelings-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 20px;
    max-height: 300px;
    overflow-y: auto;
    padding: 10px;
    border-radius: 15px;
    background: var(--card-bg);
}

.feeling-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 6px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-color);
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.feeling-btn:hover {
    transform: scale(1.05);
}

.feeling-btn.selected {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.feeling-emoji {
    font-size: 20px;
    margin-bottom: 5px;
}

.feeling-text {
    font-size: 12px;
    font-weight: 500;
    text-align: center;
}

#notes-input {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--card-bg);
    color: var(--text-color);
    font-family: inherit;
    resize: vertical;
    min-height: 80px;
    margin-bottom: 20px;
}

/* Thank You Screen */
.thankyou-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
    text-align: center;
}

.thankyou-content h2 {
    font-size: 2em;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.thankyou-content p {
    font-size: 1.1em;
    margin-bottom: 40px;
    color: var(--text-secondary);
}

/* History Screen */
.history-content {
    padding: 20px;
    flex: 1;
    overflow-y: auto;
}

.history-filters {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 20px;
}

.filter-btn {
    padding: 8px 16px;
    border: 2px solid var(--border-color);
    border-radius: 20px;
    background: var(--bg-color);
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
}

.filter-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.export-section {
    margin: 20px 0;
    padding: 15px;
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.history-list {
    max-height: 400px;
    overflow-y: auto;
}

/* Report Screen */
.report-content {
    padding: 20px;
    flex: 1;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
    padding-bottom: 100px;
}

.period-selector {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 30px;
}

.period-btn {
    padding: 10px 20px;
    border: 2px solid var(--border-color);
    border-radius: 20px;
    background: var(--bg-color);
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
}

.period-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.chart-container {
    margin-bottom: 30px;
    padding: 20px;
    background: var(--card-bg);
    border-radius: 15px;
    border: 1px solid var(--border-color);
    text-align: center;
}

#mood-chart {
    width: 100%;
    max-width: 350px;
    height: 200px;
    margin: 0 auto;
    display: block;
}

.report-text {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
    font-size: 14px;
    line-height: 1.6;
}

.ai-analysis {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 30px;
}

.ai-analysis h3 {
    margin-bottom: 15px;
    color: var(--text-color);
}

.ai-result {
    background: rgba(74, 111, 227, 0.1);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 15px;
    font-size: 14px;
    line-height: 1.6;
}

.export-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin: 30px 0 50px 0;
}

/* Mobile Responsive */
@media (max-width: 480px) {
    .feeling-emoji {
        font-size: 16px;
    }
    
    .feeling-text {
        font-size: 10px;
    }
    
    .primary-btn, .secondary-btn {
        margin: 8px auto;
        padding: 14px 20px;
        font-size: 14px;
    }
    
    .feelings-grid {
        max-height: none;
        height: auto;
        overflow: visible;
    }
    
    .welcome-content h1 {
        font-size: 2.5em;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}