/* ========================================
   Proyecto Manglar Uno - Academic App
   Mobile-Only Design
   ======================================== */

/* ========================================
   Variables CSS
   ======================================== */
:root {
    /* Colores principales */
    --color-primario: #1E6CEB;
    --color-primario-dark: #1551B8;
    --blanco: #FFFFFF;
    --gris-oscuro: #1A1F28;
    --gris-medio: #6C757D;
    --gris-claro: #F0F4F8;
    
    /* Colores de estados */
    --rojo-alerta: #E53E3E;
    --rojo-claro: #FFE6E6;
    --verde-exito: #059669;
    --verde-claro: #ECFDF5;
    --amarillo-advertencia: #92400E;
    --amarillo-claro: #FEF9C3;
    
    /* Colores de iconos */
    --naranja-materia: #FF9E4D;
    --azul-claro-materia: #E3F2FD;
    --azul-quiz: #4299E1;
    
    /* Tipografía */
    --fuente-principal: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Espaciado (baseline 8px) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-7: 32px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Sombras */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
}

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

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--fuente-principal);
    background-color: var(--blanco);
    color: var(--gris-oscuro);
    line-height: 1.5;
    overflow-x: hidden;
}

/* ========================================
   Mobile Container
   ======================================== */
.mobile-container {
    max-width: 428px; /* iPhone 14 Pro max width */
    margin: 0 auto;
    background-color: var(--blanco);
    min-height: 100vh;
    position: relative;
    padding-bottom: 84px; /* Space for bottom nav */
}

/* ========================================
   Header
   ======================================== */
.header {
    background-color: var(--blanco);
    padding: var(--space-4) var(--space-4) var(--space-3);
    padding-top: max(var(--space-4), env(safe-area-inset-top));
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    overflow: hidden;
    border: 2px solid var(--color-primario);
    flex-shrink: 0;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.greeting {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.greeting-small {
    font-size: 14px;
    font-weight: 400;
    color: var(--gris-medio);
    line-height: 1.4;
}

.greeting-large {
    font-size: 20px;
    font-weight: 700;
    color: var(--gris-oscuro);
    line-height: 1.2;
}

.notification-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: none;
    background-color: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    color: var(--gris-medio);
    transition: background-color 0.2s ease;
}

.notification-btn:active {
    background-color: var(--gris-claro);
}

.notification-btn svg {
    width: 24px;
    height: 24px;
}

.notification-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 12px;
    height: 12px;
    background-color: var(--rojo-alerta);
    border-radius: var(--radius-full);
    border: 2px solid var(--blanco);
}

/* ========================================
   Main Content
   ======================================== */
.main-content {
    padding: var(--space-5) var(--space-4);
}

/* ========================================
   Academic Card
   ======================================== */
.academic-card {
    background: linear-gradient(135deg, var(--color-primario), var(--color-primario-dark));
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    color: var(--blanco);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--space-6);
}

.academic-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-5);
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 8px;
    border-radius: var(--radius-xl);
    font-size: 12px;
    font-weight: 500;
    line-height: 1.4;
}

.badge-white {
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--blanco);
}

.badge-subject {
    background-color: rgba(255, 255, 255, 0.26);
    color: var(--blanco);
    padding: 4px 10px;
}

.growth-indicator {
    font-size: 12px;
    font-weight: 500;
    color: var(--blanco);
    opacity: 0.95;
}

.academic-body {
    text-align: left;
    margin-bottom: var(--space-5);
}

.grade-large {
    display: flex;
    align-items: baseline;
    justify-content: flex-start;
    gap: 4px;
    margin-bottom: var(--space-2);
}

.grade-number {
    font-size: 48px;
    font-weight: 700;
    line-height: 1;
    color: var(--blanco);
}

.grade-total {
    font-size: 24px;
    font-weight: 400;
    line-height: 1;
    color: var(--blanco);
    opacity: 0.9;
}

.grade-subtitle {
    font-size: 16px;
    font-weight: 400;
    color: var(--blanco);
    opacity: 0.95;
}

.academic-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.subjects-badges {
    display: flex;
    gap: 6px;
}

.link-details {
    font-size: 14px;
    font-weight: 500;
    color: var(--blanco);
    text-decoration: underline;
    text-underline-offset: 3px;
    opacity: 0.9;
}

/* ========================================
   Sections
   ======================================== */
.section {
    margin-bottom: var(--space-6);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--gris-oscuro);
    line-height: 1.2;
}

.link-view-all {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primario);
    text-decoration: none;
}

.link-view-all:active {
    opacity: 0.7;
}

/* ========================================
   Assignments Scroll (Horizontal)
   ======================================== */
.assignments-scroll {
    display: flex;
    gap: var(--space-3);
    overflow-x: auto;
    padding-bottom: var(--space-2);
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
}

.assignments-scroll::-webkit-scrollbar {
    display: none; /* Chrome, Safari */
}

.assignment-card {
    flex: 0 0 280px;
    background-color: var(--blanco);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    box-shadow: var(--shadow-sm);
    scroll-snap-align: start;
}

.assignment-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.assignment-icon.math {
    background-color: var(--naranja-materia);
}

.assignment-icon.essay {
    background-color: var(--azul-claro-materia);
}

.assignment-icon.quiz {
    background-color: var(--azul-quiz);
}

.assignment-icon svg {
    width: 24px;
    height: 24px;
}

.assignment-content {
    flex: 1;
    min-width: 0;
}

.assignment-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--gris-oscuro);
    line-height: 1.3;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.assignment-subject {
    font-size: 12px;
    font-weight: 500;
    color: var(--gris-medio);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-2);
}

.assignment-footer {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.badge-urgent-time {
    background-color: var(--rojo-claro);
    color: var(--rojo-alerta);
    padding: 4px 8px;
    border-radius: var(--radius-xl);
    font-size: 12px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.badge-urgent {
    background-color: var(--rojo-alerta);
    color: var(--blanco);
    padding: 4px 8px;
    border-radius: var(--radius-xl);
    font-size: 12px;
    font-weight: 500;
}

.badge-date {
    background-color: var(--gris-claro);
    color: var(--gris-medio);
    padding: 4px 8px;
    border-radius: var(--radius-xl);
    font-size: 12px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.badge-date svg {
    width: 12px;
    height: 12px;
}

/* Placeholder card for scroll hint */
.assignment-card-placeholder {
    opacity: 0.6;
}

/* ========================================
   Grades List (Vertical)
   ======================================== */
.grades-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.grade-card {
    background-color: var(--blanco);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    box-shadow: var(--shadow-sm);
}

.grade-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background-color: var(--gris-claro);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.grade-icon svg {
    width: 24px;
    height: 24px;
}

.grade-info {
    flex: 1;
    min-width: 0;
}

.grade-subject-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--gris-oscuro);
    line-height: 1.3;
    margin-bottom: 2px;
}

.grade-activity {
    font-size: 14px;
    font-weight: 400;
    color: var(--gris-medio);
    line-height: 1.3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.grade-score {
    font-size: 18px;
    font-weight: 700;
    line-height: 1;
    padding: 8px 12px;
    border-radius: var(--radius-xl);
    flex-shrink: 0;
}

.grade-score-high {
    background-color: var(--verde-claro);
    color: var(--verde-exito);
}

.grade-score-medium {
    background-color: var(--amarillo-claro);
    color: var(--amarillo-advertencia);
}

.grade-score-low {
    background-color: var(--rojo-claro);
    color: var(--rojo-alerta);
}

/* ========================================
   Bottom Spacer
   ======================================== */
.bottom-spacer {
    height: var(--space-4);
}

/* ========================================
   Bottom Navigation
   ======================================== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 428px;
    background-color: var(--blanco);
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: var(--space-2) 0;
    padding-bottom: max(var(--space-2), env(safe-area-inset-bottom));
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: var(--space-2) var(--space-3);
    text-decoration: none;
    color: var(--gris-medio);
    transition: color 0.2s ease;
    min-width: 64px;
}

.nav-item svg {
    width: 24px;
    height: 24px;
    transition: stroke 0.2s ease;
}

.nav-item span {
    font-size: 12px;
    font-weight: 500;
    line-height: 1.2;
}

.nav-item.active {
    color: var(--color-primario);
}

.nav-item.active svg {
    stroke: var(--color-primario);
}

.nav-item:active {
    opacity: 0.7;
}

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

.academic-card,
.assignment-card,
.grade-card {
    animation: fadeIn 0.4s ease-out;
}

.assignment-card:nth-child(1) { animation-delay: 0.1s; }
.assignment-card:nth-child(2) { animation-delay: 0.2s; }
.assignment-card:nth-child(3) { animation-delay: 0.3s; }

.grade-card:nth-child(1) { animation-delay: 0.1s; }
.grade-card:nth-child(2) { animation-delay: 0.2s; }
.grade-card:nth-child(3) { animation-delay: 0.3s; }
.grade-card:nth-child(4) { animation-delay: 0.4s; }

/* ========================================
   Safe Area Support (iPhone X+)
   ======================================== */
@supports (padding: max(0px)) {
    .header {
        padding-left: max(var(--space-4), env(safe-area-inset-left));
        padding-right: max(var(--space-4), env(safe-area-inset-right));
    }
    
    .main-content {
        padding-left: max(var(--space-4), env(safe-area-inset-left));
        padding-right: max(var(--space-4), env(safe-area-inset-right));
    }
    
    .bottom-nav {
        padding-left: max(var(--space-2), env(safe-area-inset-left));
        padding-right: max(var(--space-2), env(safe-area-inset-right));
    }
}

/* ========================================
   Active States & Interactions
   ======================================== */
.assignment-card:active,
.grade-card:active {
    transform: scale(0.98);
    transition: transform 0.1s ease;
}

.link-details:active,
.link-view-all:active {
    opacity: 0.7;
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center {
    text-align: center;
}

.hidden {
    display: none;
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .bottom-nav,
    .notification-btn,
    .header {
        display: none;
    }
}