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

:root {
    --primary-color: #a876aa;
    --gradient-start: #cbd5ff;
    --gradient-end: #902680;
    --card-bg: rgba(255, 255, 255, 0.95);
    --text-dark: #333;
    --text-light: #666;
}

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

body {
    font-family: "Montserrat", sans-serif;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    background-attachment: fixed;
    padding: 20px;
}

.container {
    max-width: 500px;
    margin: 0 auto;
}

/* Pantallas */
.screen {
    display: none;
}

.screen.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

/* Botón volver */
.back-btn {
    display: inline-block;
    color: white;
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 20px;
    opacity: 0.9;
    transition: opacity 0.2s;
}

.back-btn:hover {
    opacity: 1;
}

/* Títulos */
h1 {
    color: white;
    text-align: center;
    font-size: 28px;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
    color: rgba(255,255,255,0.9);
    text-align: center;
    font-size: 14px;
    margin-bottom: 30px;
}

/* Grid de fases */
.phases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 30px;
}

.phase-checkbox {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 15px 10px;
    background: var(--card-bg);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.phase-checkbox:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

.phase-checkbox input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkmark {
    width: 24px;
    height: 24px;
    border: 2px solid var(--primary-color);
    border-radius: 6px;
    margin-bottom: 8px;
    transition: all 0.2s ease;
    position: relative;
}

.phase-checkbox input:checked ~ .checkmark {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--gradient-end) 100%);
    border-color: transparent;
}

.phase-checkbox input:checked ~ .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 14px;
    font-weight: bold;
}

.phase-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dark);
}

/* Botones */
.btn-primary {
    width: 100%;
    padding: 18px 30px;
    font-size: 16px;
    font-weight: 700;
    color: white;
	background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
	box-shadow: 0 5px 20px rgba(245, 87, 108, 0.3);
    border: none;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 6px 20px rgba(144, 38, 128, 0.3);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(144, 38, 128, 0.4);
}

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

.btn-secondary {
    flex: 1;
    padding: 15px 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
    background: var(--card-bg);
    border: 2px solid var(--primary-color);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.buttons-row {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.buttons-row .btn-primary {
    flex: 1.5;
}

/* Tarjetas de epígrafes */
.epigrafe-card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.epigrafe-card.mini {
    padding: 15px;
}

.epigrafe-number {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--gradient-end) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 16px;
    flex-shrink: 0;
}

.epigrafe-card.mini .epigrafe-number {
    width: 28px;
    height: 28px;
    font-size: 13px;
}

.epigrafe-content {
    flex: 1;
}

/* Nueva línea de información: Epígrafe X | Fase Y | Tema Z */
.epigrafe-info {
    font-size: 11px;
    color: white;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 6px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--gradient-end) 100%);
    padding: 4px 10px;
    border-radius: 20px;
    display: inline-block;
    letter-spacing: 0.5px;
}

.epigrafe-card.mini .epigrafe-info {
    font-size: 9px;
    padding: 3px 8px;
    margin-bottom: 4px;
}

.epigrafe-titulo {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 8px;
    font-style: italic;
}

.epigrafe-texto {
    font-size: 15px;
    color: var(--text-dark);
    line-height: 1.5;
    font-weight: 500;
}

.epigrafe-card.mini .epigrafe-titulo {
    font-size: 11px;
    margin-bottom: 5px;
}

.epigrafe-card.mini .epigrafe-texto {
    font-size: 13px;
}

/* Timer */
.timer {
    font-size: 80px;
    font-weight: 700;
    color: white;
    text-align: center;
    text-shadow: 3px 3px 6px rgba(0,0,0,0.3);
    margin: 20px 0 30px;
    font-variant-numeric: tabular-nums;
}

.timer.warning {
    color: #ff6b6b;
    animation: pulse 1s infinite;
}

.timer.danger {
    color: #ff4757;
    animation: pulse 0.5s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.timer-controls {
    display: flex;
    gap: 12px;
    margin-top: 25px;
}

.btn-control {
    flex: 1;
    padding: 15px 20px;
    font-size: 14px;
    font-weight: 600;
    color: white;
    background: rgba(255,255,255,0.2);
    border: 2px solid rgba(255,255,255,0.4);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-control:hover {
    background: rgba(255,255,255,0.3);
}

.btn-control.btn-danger {
    background: rgba(255, 71, 87, 0.3);
    border-color: rgba(255, 71, 87, 0.6);
}

.btn-control.btn-danger:hover {
    background: rgba(255, 71, 87, 0.5);
}

/* Responsive */
@media (max-width: 380px) {
    .phases-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }
    
    .phase-checkbox {
        padding: 12px 8px;
    }
    
    .phase-label {
        font-size: 11px;
    }
    
    .timer {
        font-size: 60px;
    }
    
    h1 {
        font-size: 24px;
    }
    
    .epigrafe-info {
        font-size: 10px;
    }
}

.btn-felicitacion {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  box-shadow: 0 5px 20px rgba(245, 87, 108, 0.3);
}