/* ============================================
   BAC PRO CIEL - Styles Principaux
   Design minimaliste noir & blanc
   ============================================ */

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

/* === VARIABLES CSS === */
:root {
    /* Couleurs noir et blanc */
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e5e5;
    --color-gray-300: #d4d4d4;
    --color-gray-400: #a3a3a3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;

    /* Couleurs principales */
    --color-text: #000000;
    --color-text-light: #525252;
    --color-text-lighter: #737373;
    --color-bg: #ffffff;
    --color-bg-secondary: #f5f5f5;
    --color-bg-tertiary: #e5e5e5;
    --color-border: #e5e5e5;

    /* Ombres */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* 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: 4px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;

    /* Typographie */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Header */
    --header-height: 70px;
}

/* === MODE SOMBRE === */
[data-theme="dark"] {
    --color-text: #ffffff;
    --color-text-light: #d4d4d4;
    --color-text-lighter: #a3a3a3;
    --color-bg: #0a0a0a;
    --color-bg-secondary: #1a1a1a;
    --color-bg-tertiary: #2a2a2a;
    --color-border: #333333;

    --color-black: #ffffff;
    --color-white: #0a0a0a;

    --shadow-sm: 0 1px 2px 0 rgba(255, 255, 255, 0.1);
    --shadow: 0 4px 6px -1px rgba(255, 255, 255, 0.1);
    --shadow-md: 0 10px 15px -3px rgba(255, 255, 255, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(255, 255, 255, 0.15);
}

/* === GLOBAL === */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === TYPOGRAPHIE === */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

h1 { font-size: 2.5rem; font-weight: 700; }
h2 { font-size: 2rem; font-weight: 700; }
h3 { font-size: 1.75rem; font-weight: 600; }
h4 { font-size: 1.5rem; font-weight: 600; }
h5 { font-size: 1.25rem; font-weight: 600; }
h6 { font-size: 1rem; font-weight: 600; }

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

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

a:hover {
    color: var(--color-gray-600);
}

/* === HEADER === */
.header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: var(--header-height);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

[data-theme="light"] .header {
    background: #ffffff;
}

[data-theme="dark"] .header {
    background: #0a0a0a;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.header-logo {
    display: flex;
    align-items: center;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    flex-shrink: 0;
}

[data-theme="light"] .header-logo {
    color: #000000;
}

[data-theme="dark"] .header-logo {
    color: #ffffff;
}

.header-logo:hover {
    opacity: 0.8;
}

/* Navigation */
.header-nav {
    display: flex;
    align-items: center;
    flex: 1;
    justify-content: center;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-sm);
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--color-text-light);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius);
    transition: var(--transition-fast);
    font-size: 0.9375rem;
    white-space: nowrap;
}

.nav-links a:hover {
    color: var(--color-text);
    background: var(--color-bg-secondary);
}

.nav-links a.active {
    color: var(--color-text);
    background: var(--color-bg-secondary);
}

/* Actions à droite */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-shrink: 0;
}

.header-auth-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

/* Theme toggle */
.theme-toggle {
    width: 36px;
    height: 36px;
    min-width: 36px;
    min-height: 36px;
    background: none;
    border: none;
    color: var(--color-text-light);
    cursor: pointer;
    padding: 0;
    border-radius: var(--radius);
    transition: background-color 0.15s ease, color 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.theme-toggle:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.theme-toggle i {
    font-size: 0.875rem;
    width: 0.875rem;
    height: 0.875rem;
    display: block;
}

/* User dropdown */
.user-menu {
    position: relative;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-black);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.user-avatar:hover {
    background: var(--color-gray-700);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 200px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm);
    display: none;
}

.user-dropdown.active {
    display: block;
}

.user-dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius);
    color: var(--color-text);
    transition: var(--transition-fast);
}

.user-dropdown-item:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

/* Mobile menu toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 2px;
    background: var(--color-black);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--color-gray-800);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn i {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-black);
    border: 2px solid var(--color-black);
}

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

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

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

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

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

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

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

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

/* === FORMS === */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-white);
    color: var(--color-text);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-black);
}

.form-group small {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--color-text-light);
    font-size: 0.875rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

/* === CARDS === */
.card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.card-header {
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.card-body {
    color: var(--color-text-light);
}

/* === BADGES === */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.25rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-xl);
    white-space: nowrap;
}

.badge-primary { background: var(--color-black); color: var(--color-white); }
.badge-success { background: var(--color-black); color: var(--color-white); }
.badge-warning { background: var(--color-gray-700); color: var(--color-white); }
.badge-danger { background: var(--color-gray-800); color: var(--color-white); }
.badge-info { background: var(--color-gray-600); color: var(--color-white); }
.badge-secondary { background: var(--color-bg-tertiary); color: var(--color-text); }

/* === ALERTS === */
.alert {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    border: 2px solid;
}

.alert i {
    font-size: 1.25rem;
}

.alert-success {
    background: #f0fdf4;
    border-color: #16a34a;
    color: #15803d;
}

.alert-error,
.alert-danger {
    background: #fef2f2;
    border-color: #dc2626;
    color: #991b1b;
}

.alert-warning {
    background: #fffbeb;
    border-color: #f59e0b;
    color: #b45309;
}

.alert-info {
    background: #eff6ff;
    border-color: #3b82f6;
    color: #1e40af;
}

/* Mode sombre */
[data-theme="dark"] .alert-success {
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.4);
    color: #86efac;
}

[data-theme="dark"] .alert-error,
[data-theme="dark"] .alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.4);
    color: #fca5a5;
}

[data-theme="dark"] .alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.4);
    color: #fcd34d;
}

[data-theme="dark"] .alert-info {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.4);
    color: #93c5fd;
}

.alert ul {
    margin: 0;
    padding-left: var(--spacing-lg);
}

/* === PAGE AUTH === */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
    position: relative;
    padding: var(--spacing-lg);
}

.auth-page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        linear-gradient(to bottom, transparent 0%, var(--color-gray-100) 100%);
    pointer-events: none;
}

.auth-container {
    width: 100%;
    max-width: 450px;
    position: relative;
    z-index: 1;
}

.auth-box {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
}

.auth-logo {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-logo i {
    font-size: 3rem;
    color: var(--color-black);
    margin-bottom: var(--spacing-md);
}

.auth-logo h1 {
    margin: 0;
    font-size: 1.75rem;
    color: var(--color-black);
}

.auth-box h2 {
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.auth-subtitle {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
}

.auth-links {
    text-align: center;
    margin-top: var(--spacing-xl);
    color: var(--color-text-light);
}

.demo-credentials {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
    border-radius: var(--radius);
    font-size: 0.875rem;
}

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

.demo-credentials ul {
    list-style: none;
    padding: 0;
}

.demo-credentials li {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-light);
}

/* === CONTAINER === */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-sm {
    max-width: 800px;
}

/* === GRID === */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* === UTILITIES === */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-light); }
.text-primary { color: var(--color-black); }
.text-success { color: var(--color-black); }
.text-danger { color: var(--color-black); }

.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); }

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    /* Header devient simple sur tablette/mobile */
    .header-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        width: 100%;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        flex: none;
        justify-content: flex-start;
        z-index: 999;
    }

    [data-theme="light"] .header-nav {
        background: #ffffff;
    }

    [data-theme="dark"] .header-nav {
        background: #0a0a0a;
    }

    .header-nav.active {
        max-height: calc(100vh - var(--header-height));
        overflow-y: auto;
    }

    .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 0;
        padding: var(--spacing-md) 0;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        width: 100%;
        padding: var(--spacing-md) var(--spacing-lg);
        border-radius: 0;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links li:last-child a {
        border-bottom: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .header-auth-buttons {
        display: none;
    }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }

    .header-container {
        padding: 0 var(--spacing-md);
    }

    .header-actions {
        gap: var(--spacing-sm);
    }

    .btn-sm {
        padding: 0.375rem 0.75rem;
        font-size: 0.8125rem;
    }

    .user-avatar {
        width: 36px;
        height: 36px;
        font-size: 0.8125rem;
    }
}

/* Safety: ensure footer remains visible (fixes cases where overlays or fixed elements hide it) */
.footer {
    position: relative;
    z-index: 50;
    display: block;
}