/*
 * Sistema de Rifas - Diseño Material Design Flat
 * Inspirado en Google Material Design
 */

/* ============================================
   VARIABLES MATERIAL DESIGN
   ============================================ */
:root {
    /* Colores principales - Material Design */
    --primary: #1976D2;
    --primary-light: #42A5F5;
    --primary-dark: #1565C0;

    --secondary: #FF9800;
    --secondary-light: #FFB74D;
    --secondary-dark: #F57C00;

    --success: #4CAF50;
    --error: #F44336;
    --warning: #FFC107;
    --info: #2196F3;

    /* Colores neutros */
    --white: #FFFFFF;
    --black: #000000;
    --background: #FAFAFA;
    --surface: #FFFFFF;
    --border: #E0E0E0;

    /* Texto */
    --text-primary: rgba(0, 0, 0, 0.87);
    --text-secondary: rgba(0, 0, 0, 0.6);
    --text-disabled: rgba(0, 0, 0, 0.38);
    --text-white: rgba(255, 255, 255, 0.87);

    /* Elevaciones (Material Design) */
    --elevation-1: 0 2px 4px rgba(0,0,0,0.14), 0 3px 4px rgba(0,0,0,0.12);
    --elevation-2: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --elevation-3: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    --elevation-4: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);

    /* Tipografía */
    --font-primary: 'Roboto', 'Segoe UI', Arial, sans-serif;

    /* Bordes */
    --radius: 8px;
    --radius-sm: 4px;
    --radius-lg: 16px;

    /* Transiciones */
    --transition: 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
}

/* ============================================
   RESET Y BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

/* ============================================
   NAVBAR MATERIAL DESIGN
   ============================================ */
.navbar {
    background: var(--white);
    box-shadow: var(--elevation-1);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--primary);
    font-size: 20px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    letter-spacing: 0.5px;
}

.logo:hover {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
    align-items: center;
}

.nav-menu li a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 16px;
    display: block;
    font-weight: 500;
    transition: var(--transition);
    border-radius: var(--radius-sm);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-menu li a:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--primary);
}

/* ============================================
   HERO MATERIAL DESIGN
   ============================================ */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 64px 16px;
    text-align: center;
    color: var(--white);
}

.hero h1 {
    font-size: 48px;
    font-weight: 400;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.hero p {
    font-size: 20px;
    opacity: 0.9;
    font-weight: 300;
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   CARDS MATERIAL DESIGN
   ============================================ */
.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--elevation-1);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--elevation-3);
    transform: translateY(-4px);
}

.card-image {
    width: 100%;
    height: 240px;
    object-fit: cover;
}

.card-content {
    padding: 16px;
}

.card-title {
    font-size: 24px;
    font-weight: 400;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.card-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.card-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   BOTONES MATERIAL DESIGN
   ============================================ */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--elevation-1);
    position: relative;
    overflow: hidden;
}

.btn:active {
    box-shadow: var(--elevation-2);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: var(--elevation-2);
}

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

.btn-secondary:hover {
    background: var(--secondary-dark);
    box-shadow: var(--elevation-2);
}

.btn-outlined {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    box-shadow: none;
}

.btn-outlined:hover {
    background: rgba(25, 118, 210, 0.04);
}

.btn-text {
    background: transparent;
    color: var(--primary);
    box-shadow: none;
}

.btn-text:hover {
    background: rgba(25, 118, 210, 0.04);
}

.btn-large {
    padding: 16px 32px;
    font-size: 15px;
}

.btn-block {
    width: 100%;
    text-align: center;
}

/* Ripple effect */
.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

/* ============================================
   GRID SYSTEM
   ============================================ */
.grid {
    display: grid;
    gap: 24px;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ============================================
   SECCIONES
   ============================================ */
.section {
    padding: 64px 16px;
}

.section-title {
    font-size: 34px;
    font-weight: 400;
    margin-bottom: 8px;
    color: var(--text-primary);
    text-align: center;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 48px;
}

/* ============================================
   BADGES MATERIAL DESIGN
   ============================================ */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success {
    background: rgba(76, 175, 80, 0.1);
    color: var(--success);
}

.badge-error {
    background: rgba(244, 67, 54, 0.1);
    color: var(--error);
}

.badge-warning {
    background: rgba(255, 193, 7, 0.1);
    color: var(--warning);
}

.badge-info {
    background: rgba(33, 150, 243, 0.1);
    color: var(--info);
}

/* ============================================
   ALERTS MATERIAL DESIGN
   ============================================ */
.alert {
    padding: 16px;
    margin: 16px 0;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--elevation-1);
}

.alert-success {
    background: rgba(76, 175, 80, 0.1);
    color: var(--success);
    border-left: 4px solid var(--success);
}

.alert-error {
    background: rgba(244, 67, 54, 0.1);
    color: var(--error);
    border-left: 4px solid var(--error);
}

.alert-warning {
    background: rgba(255, 193, 7, 0.1);
    color: #F57F17;
    border-left: 4px solid var(--warning);
}

.alert-info {
    background: rgba(33, 150, 243, 0.1);
    color: var(--info);
    border-left: 4px solid var(--info);
}

/* ============================================
   FORMS MATERIAL DESIGN
   ============================================ */
.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-family: var(--font-primary);
    transition: var(--transition);
    background: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

/* ============================================
   CHIPS (Tags)
   ============================================ */
.chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--border);
    border-radius: 16px;
    font-size: 14px;
    color: var(--text-primary);
}

/* ============================================
   DIVIDER
   ============================================ */
.divider {
    height: 1px;
    background: var(--border);
    margin: 32px 0;
}

/* ============================================
   PRICE TAG
   ============================================ */
.price-tag {
    display: inline-block;
    font-size: 32px;
    font-weight: 500;
    color: var(--primary);
}

.price-tag-currency {
    font-size: 20px;
    vertical-align: super;
}

/* ============================================
   FEATURE CARDS
   ============================================ */
.feature-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.feature-card:hover {
    box-shadow: var(--elevation-2);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
    display: block;
}

.feature-title {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.feature-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   FOOTER MATERIAL DESIGN
   ============================================ */
.footer {
    background: #263238;
    color: rgba(255, 255, 255, 0.7);
    padding: 48px 16px 24px;
    margin-top: 64px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
}

.footer-section h3 {
    color: var(--white);
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    display: block;
    margin-bottom: 12px;
    font-size: 14px;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--white);
    padding-left: 4px;
}

.footer-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.12);
    margin: 32px 0;
}

.footer-bottom {
    text-align: center;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

/* Logos de pago en footer */
.payment-logos-footer {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.payment-logo {
    background: rgba(255, 255, 255, 0.05);
    padding: 12px;
    border-radius: var(--radius-sm);
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.payment-logo:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.payment-logo-name {
    font-weight: 500;
    font-size: 14px;
    color: var(--white);
    margin-bottom: 4px;
}

.payment-logo-desc {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 32px;
    }

    .hero p {
        font-size: 16px;
    }

    .nav-menu {
        flex-direction: column;
        width: 100%;
        align-items: stretch;
    }

    .navbar .container {
        flex-direction: column;
        height: auto;
        gap: 16px;
    }

    .section {
        padding: 32px 16px;
    }

    .section-title {
        font-size: 28px;
    }
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.p-1 { padding: 8px; }
.p-2 { padding: 16px; }
.p-3 { padding: 24px; }
.p-4 { padding: 32px; }

/* ============================================
   ANIMACIONES SUTILES
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease;
}

.slide-up {
    animation: slideUp 0.5s ease;
}

/* ============================================
   FAB (Floating Action Button)
   ============================================ */
.fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--secondary);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--elevation-3);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 24px;
}

.fab:hover {
    box-shadow: var(--elevation-4);
    transform: scale(1.1);
}