/* 
 * Prépa - Design System & Custom Styles
 * Mobile-first responsive design
 */

/* ========================================
   VARIABLES CSS
   ======================================== */
:root {
    /* Couleurs principales */
    --color-primary: #0F172A;
    --color-primary-light: #1E293B;
    --color-primary-dark: #020617;
    
    --color-accent: #3B82F6;
    --color-accent-light: #60A5FA;
    --color-accent-dark: #2563EB;
    
    --color-secondary: #8B5CF6;
    --color-secondary-light: #A78BFA;
    
    /* Couleurs gamification */
    --color-success: #10B981;
    --color-xp: #F59E0B;
    --color-danger: #EF4444;
    --color-info: #06B6D4;
    --color-warning: #F97316;
    
    /* Couleurs neutres */
    --color-white: #FFFFFF;
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-500: #6B7280;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;
    
    /* Typographie */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Espacements */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

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

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

body {
    font-family: var(--font-body);
    background-color: var(--color-gray-50);
    color: var(--color-gray-900);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========================================
   TYPOGRAPHIE
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent-dark);
}

/* ========================================
   LAYOUT CONTAINERS
   ======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.page-wrapper {
    min-height: 100vh;
    padding-bottom: 80px; /* Space for bottom nav */
}

/* ========================================
   HEADER COMPONENTS
   ======================================== */
.header-sticky {
    position: sticky;
    top: 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    padding: var(--spacing-md);
    z-index: var(--z-sticky);
    box-shadow: var(--shadow-lg);
}


/* ========================================
   FEED CARDS
   ======================================== */
.feed-container {
    padding: var(--spacing-md);
    max-width: 640px;
    margin: 0 auto;
}

.feed-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
    animation: fadeInUp 0.5s ease-out;
}

.feed-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 0.938rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, #1e40af 0%, #2563eb 50%, #3b82f6 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #2563eb 100%);
}

.btn-secondary {
    background: var(--color-gray-100);
    color: var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-gray-200);
}

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

.btn-outline:hover {
    background: var(--color-accent);
    color: var(--color-white);
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.813rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Badge Component */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background: var(--color-success);
    color: var(--color-white);
}

.badge-warning {
    background: var(--color-xp);
    color: var(--color-white);
}

.badge-danger {
    background: var(--color-danger);
    color: var(--color-white);
}

.badge-info {
    background: var(--color-info);
    color: var(--color-white);
}

.badge-secondary {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
}


/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.animate-pulse {
    animation: pulse 2s infinite;
}

.animate-shake {
    animation: shake 0.5s;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        transform: translateY(0);
        opacity: 1;
    }
    to {
        transform: translateY(100%);
        opacity: 0;
    }
}

/* ========================================
   MODAL
   ======================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

/* ========================================
   REPUTATION BADGES
   ======================================== */
.reputation-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
}

.reputation-badge.debutant {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
}

.reputation-badge.contributeur {
    background: var(--color-accent);
    color: var(--color-white);
}

.reputation-badge.actif {
    background: var(--color-secondary);
    color: var(--color-white);
}

.reputation-badge.expert {
    background: var(--color-xp);
    color: var(--color-white);
}

.reputation-badge.legende {
    background: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
    color: var(--color-white);
}

/* ========================================
   DISCUSSIONS COMPONENTS
   ======================================== */
.categorie-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-white);
}

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

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }

/* ========================================
   RESPONSIVE
   ======================================== */
@media (min-width: 768px) {
    .feed-container {
        padding: var(--spacing-xl);
    }
    
    h1 { font-size: 3rem; }
    h2 { font-size: 2.5rem; }
}

/* ========================================
   DESKTOP LAYOUT
   ======================================== */
@media (min-width: 1024px) {
    .page-wrapper {
        margin-left: 260px;
    }
}

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
    .header-sticky,
    .btn {
        display: none;
    }
}

/* ========================================
   ANIMATIONS MODULE SPORT
   ======================================== */

/* Animation pulse pour les compteurs */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.9;
    }
}

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Animation slide pour les transitions d'exercice */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutLeft {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(-100%);
        opacity: 0;
    }
}

.slide-in-right {
    animation: slideInRight 0.3s ease-out;
}

.slide-out-left {
    animation: slideOutLeft 0.3s ease-in;
}

/* Animation shake pour les dernières secondes de repos */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.shake {
    animation: shake 0.5s ease-in-out;
}

/* Animation bounce pour les notifications */
@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.bounce {
    animation: bounce 0.6s ease-in-out infinite;
}

/* Animation confetti pour fin de séance */
@keyframes confetti-fall {
    0% {
        transform: translateY(-100vh) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}

.confetti {
    animation: confetti-fall 3s linear infinite;
}

/* Animation fade-in pour les éléments qui apparaissent */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.4s ease-out;
}

/* Animation scale pour les boutons et badges */
@keyframes scaleUp {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.scale-up {
    animation: scaleUp 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Animation glow pour les éléments importants */
@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(249, 115, 22, 0.5),
                    0 0 10px rgba(249, 115, 22, 0.3);
    }
    50% {
        box-shadow: 0 0 20px rgba(249, 115, 22, 0.8),
                    0 0 30px rgba(249, 115, 22, 0.4);
    }
}

.glow-orange {
    animation: glow 2s ease-in-out infinite;
}

/* Animation countdown pour les timers */
@keyframes countdown-pulse {
    0% {
        transform: scale(1);
        color: inherit;
    }
    50% {
        transform: scale(1.2);
        color: #EF4444;
    }
    100% {
        transform: scale(1);
        color: inherit;
    }
}

.countdown-warning {
    animation: countdown-pulse 1s ease-in-out infinite;
}

/* Animation progress bar */
@keyframes progress-fill {
    from {
        width: 0%;
    }
}

.progress-animate {
    animation: progress-fill 1s ease-out;
}