/* ========================================
   VARIABLES & RESET
   ======================================== */

:root {
    /* Colores GlowMama */
    --color-primary: #FF7F9E;
    --color-primary-light: #FFE5EC;
    --color-primary-dark: #FF6B9D;
    --color-secondary: #FFA6C9;
    --color-background: #FFFBF7;
    --color-card: #FFFFFF;
    --color-text: #2C3E50;
    --color-text-light: #5A6C7D;
    --color-text-pink: #FF6B9D;
    --color-border: #FFE5EC;
    --color-success: #4CAF50;
    --color-warning: #FF9800;
    --color-danger: #F44336;
    
    /* Sombras */
    --shadow-sm: 0 2px 8px rgba(255, 127, 158, 0.1);
    --shadow-md: 0 4px 16px rgba(255, 127, 158, 0.15);
    --shadow-lg: 0 8px 24px rgba(255, 127, 158, 0.2);
    
    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 50px;
    
    /* Transiciones */
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, var(--color-background) 0%, #FFF5F7 100%);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   HEADER
   ======================================== */

.app-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.title-script {
    font-family: 'Dancing Script', cursive;
    font-size: 2.5rem;
    font-weight: 700;
}

.heart-icon {
    font-size: 1.5rem;
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.app-subtitle {
    font-size: 0.9rem;
    opacity: 0.95;
    font-weight: 400;
}

/* ========================================
   MAIN CONTAINER
   ======================================== */

.main-container {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--spacing-md);
    padding-bottom: var(--spacing-xl);
}

/* ========================================
   TAB NAVIGATION
   ======================================== */

.tab-navigation {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    background: white;
    padding: var(--spacing-xs);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    padding: var(--spacing-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-light);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Poppins', sans-serif;
}

.tab-btn:hover {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
}

.tab-btn.active {
    background: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* ========================================
   TAB CONTENT
   ======================================== */

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ========================================
   CARD
   ======================================== */

.card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: 1.5rem;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-md);
    text-align: center;
    font-weight: 600;
}

.subsection-title {
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

/* ========================================
   SIDE SELECTOR (Timer)
   ======================================== */

.side-selector {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.side-btn {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, #FFF 100%);
    border: 2px solid var(--color-border);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-family: 'Poppins', sans-serif;
}

.side-btn:hover {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.side-icon {
    font-size: 1.3rem;
}

/* ========================================
   TIMER DISPLAY
   ======================================== */

.timer-display {
    text-align: center;
    padding: var(--spacing-lg) 0;
}

.timer-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
}

.status-dot {
    animation: blink 1s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.timer-time {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    font-variant-numeric: tabular-nums;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 8px rgba(255, 127, 158, 0.2);
}

.timer-controls {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

.control-btn {
    flex: 1;
    max-width: 180px;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-family: 'Poppins', sans-serif;
}

.pause-btn {
    background: linear-gradient(135deg, #FFA500 0%, #FFB84D 100%);
    color: white;
}

.pause-btn:hover {
    background: linear-gradient(135deg, #FF8C00 0%, #FFA500 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stop-btn {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
}

.stop-btn:hover {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-icon {
    font-size: 1.2rem;
}

/* ========================================
   RECENT SESSIONS
   ======================================== */

.recent-sessions {
    margin-top: var(--spacing-lg);
}

#sessionsList {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.session-item {
    background: var(--color-primary-light);
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.session-info {
    display: flex;
    flex-direction: column;
}

.session-side {
    font-weight: 600;
    color: var(--color-primary-dark);
    font-size: 0.9rem;
}

.session-time-text {
    font-size: 0.8rem;
    color: var(--color-text-light);
}

.session-duration {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
}

/* ========================================
   BLEER SECTION
   ======================================== */

.bleer-section {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.bleer-section:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.bleer-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.bleer-boxes {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.bleer-box {
    width: 40px;
    height: 40px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: white;
    transition: var(--transition);
}

.bleer-box.filled {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.bleer-count {
    text-align: center;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-md);
}

.bleer-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.bleer-btn {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Poppins', sans-serif;
}

.add-btn {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
}

.add-btn:hover {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.remove-btn {
    background: linear-gradient(135deg, #FFEBEF 0%, #FFF 100%);
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.remove-btn:hover {
    background: linear-gradient(135deg, var(--color-danger) 0%, #FF6B6B 100%);
    color: white;
    border-color: var(--color-danger);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.daily-summary {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    text-align: center;
}

.summary-text {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-primary-dark);
}

/* ========================================
   CHART & STATS
   ======================================== */

.chart-container {
    margin-bottom: var(--spacing-lg);
    min-height: 300px;
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.chart-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 250px;
    color: var(--color-text-light);
    text-align: center;
}

.chart-placeholder p {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.chart-hint {
    font-size: 0.9rem;
    opacity: 0.8;
}

.weekly-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--color-primary-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-primary-dark);
}

.historik-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.historik-item {
    background: var(--color-background);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
}

.historik-date {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.historik-details {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* ========================================
   RESET SECTION
   ======================================== */

.reset-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.reset-btn {
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-family: 'Poppins', sans-serif;
}

.reset-today {
    background: linear-gradient(135deg, #FFA500 0%, #FFB84D 100%);
    color: white;
}

.reset-today:hover {
    background: linear-gradient(135deg, #FF8C00 0%, #FFA500 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.reset-all {
    background: linear-gradient(135deg, #FFE5EC 0%, #FFF 100%);
    color: var(--color-danger);
    border: 2px solid var(--color-danger);
}

.reset-all:hover {
    background: linear-gradient(135deg, var(--color-danger) 0%, #FF6B6B 100%);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   FOOTER
   ======================================== */

.app-footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* ========================================
   MODAL
   ======================================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    max-width: 400px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(50px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-title {
    font-size: 1.3rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.modal-text {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.modal-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.modal-btn {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Poppins', sans-serif;
}

.cancel-btn {
    background: #E0E0E0;
    color: var(--color-text);
}

.cancel-btn:hover {
    background: #D0D0D0;
}

.confirm-btn {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
}

.confirm-btn:hover {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
}

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

@media (max-width: 480px) {
    .app-title {
        font-size: 1.5rem;
    }
    
    .title-script {
        font-size: 2rem;
    }
    
    .timer-time {
        font-size: 2.5rem;
    }
    
    .tab-btn {
        font-size: 0.8rem;
        padding: 0.75rem;
    }
}