/* ==========================================
   POPNTOP - CSS DESIGN SYSTEM
   ========================================== */

/* === CSS Variables / Design Tokens === */
:root {
    /* Couleurs principales */
    --color-primary: #0000ca;
    --color-secondary: #ffff00;
    --color-background: #fde4d9;
    --color-text: #000000;
    --color-text-light: #4a4a4a;
    --color-white: #ffffff;
    --color-success: #00ca5e;
    --color-danger: #ff3b30;
    
    /* Couleurs dérivées */
    --color-primary-dark: #000098;
    --color-primary-light: #3333dd;
    --color-secondary-dark: #cccc00;
    --color-background-light: #fff5f0;
    --color-card-bg: #ffffff;
    --color-border: #e0e0e0;
    
    /* Ombres */
    --shadow-sm: 0 2px 8px rgba(0, 0, 202, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 202, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 202, 0.16);
    --shadow-xl: 0 12px 48px rgba(0, 0, 202, 0.2);
    
    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Typography */
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
}

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

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

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }

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

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    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-fade-in {
    animation: fadeIn 0.8s var(--transition-base);
}

.animate-slide-up {
    animation: slideUp 0.6s var(--transition-base);
    animation-delay: 0.3s;
    animation-fill-mode: both;
}

/* === Landing Page === */
.landing-page {
    min-height: 100vh;
}

/* Hero Section */
.hero-section {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    position: relative;
    overflow: hidden;
    padding: var(--spacing-xl) 0;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 0, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 0, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.logo-container {
    margin-bottom: var(--spacing-xl);
}

.logo-text {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: var(--font-weight-extrabold);
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.logo-accent {
    color: var(--color-secondary);
    position: relative;
}

.tagline {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    color: var(--color-white);
    font-weight: var(--font-weight-medium);
    opacity: 0.95;
}

.hero-cards {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-xl);
}

.hero-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-base);
    cursor: default;
}

.hero-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.25);
    box-shadow: var(--shadow-lg);
}

.hero-card i {
    font-size: 2rem;
    color: var(--color-secondary);
}

.hero-card span {
    color: var(--color-white);
    font-weight: var(--font-weight-semibold);
    font-size: 0.95rem;
}

/* Features Section */
.features-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-background-light);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-primary);
}

.feature-card {
    background: var(--color-card-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    height: 100%;
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.feature-icon i {
    font-size: 2rem;
    color: var(--color-white);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.feature-card p {
    color: var(--color-text-light);
    margin-bottom: 0;
}

/* Auth Section */
.auth-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-background);
}

.auth-container {
    max-width: 480px;
    margin: 0 auto;
    background: var(--color-card-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
    animation: fadeIn 0.4s var(--transition-base);
}

.auth-form h2 {
    text-align: center;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.form-label {
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.form-control {
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    font-family: var(--font-family);
    transition: all var(--transition-fast);
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 0, 202, 0.1);
    outline: none;
}

.divider {
    position: relative;
    text-align: center;
    margin: var(--spacing-lg) 0;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--color-border);
}

.divider span {
    position: relative;
    background: var(--color-card-bg);
    padding: 0 var(--spacing-md);
    color: var(--color-text-light);
    font-size: 0.9rem;
}

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

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline-dark,
.btn-outline-primary {
    background: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.btn-outline-dark:hover,
.btn-outline-primary:hover {
    background: var(--color-background);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Footer */
.landing-footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.landing-footer a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.landing-footer a:hover {
    opacity: 0.8;
}

/* === App Styles === */
.app-container {
    display: none;
    min-height: 100vh;
    background: var(--color-background);
}

.app-container.active {
    display: block;
}

/* Navigation */
.app-nav {
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    text-decoration: none;
}

.nav-brand span {
    color: var(--color-secondary);
}

/* Top Card */
.top-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    cursor: pointer;
}

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

.top-card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.top-card-title {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.top-card-subtitle {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* Item Card in Top */
.item-card {
    background: var(--color-white);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
    cursor: grab;
}

.item-card:active {
    cursor: grabbing;
}

.item-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.item-rank {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    min-width: 40px;
    text-align: center;
}

.item-image {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

.item-info {
    flex: 1;
}

.item-title {
    font-weight: var(--font-weight-semibold);
    margin-bottom: 0.25rem;
}

.item-meta {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.item-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.btn-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    border: none;
    background: var(--color-background);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* Autocomplete */
.autocomplete-container {
    position: relative;
}

.autocomplete-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    border: 2px solid var(--color-border);
    border-top: none;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    max-height: 300px;
    overflow-y: auto;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

.autocomplete-item {
    padding: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.autocomplete-item:hover {
    background: var(--color-background);
}

.autocomplete-item img {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-background);
    border-top-color: var(--color-primary);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
    margin: var(--spacing-lg) auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-xxl: 3rem;
    }
    
    .hero-cards {
        gap: var(--spacing-sm);
    }
    
    .hero-card {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .auth-container {
        padding: var(--spacing-lg);
        margin: 0 var(--spacing-md);
    }
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
}

.toast {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-width: 300px;
    animation: slideIn 0.3s var(--transition-base);
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success { border-left: 4px solid var(--color-success); }
.toast.error { border-left: 4px solid var(--color-danger); }
.toast.info { border-left: 4px solid var(--color-primary); }