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

:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --success: #48bb78;
    --danger: #f56565;
    --warning: #ed8936;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 15px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.3);
    --radius: 12px;
    --radius-lg: 20px;
}

body {
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
        Arial, sans-serif;
    background: var(--bg-gradient);
    min-height: 100vh;
    color: #2d3748;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ==================== */
/* PAGE D'ACCUEIL */
/* ==================== */
.hero-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    position: relative;
}

.hero-container::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(
            circle at 20% 50%,
            rgba(255, 255, 255, 0.1) 0%,
            transparent 50%
        ),
        radial-gradient(
            circle at 80% 80%,
            rgba(255, 255, 255, 0.1) 0%,
            transparent 50%
        );
    pointer-events: none;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    margin-bottom: 60px;
}

.logo {
    margin-bottom: 30px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 15px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    font-weight: 300;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1000px;
    width: 100%;
    position: relative;
    z-index: 1;
}

.feature-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 35px 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition:
        transform 0.3s ease,
        box-shadow 0.3s ease;
    backdrop-filter: blur(10px);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.35);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: #2d3748;
}

.feature-card p {
    color: #718096;
    font-size: 0.95rem;
}

/* ==================== */
/* AUTHENTIFICATION */
/* ==================== */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    position: relative;
}

.auth-container::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(
            circle at 20% 50%,
            rgba(255, 255, 255, 0.1) 0%,
            transparent 50%
        ),
        radial-gradient(
            circle at 80% 80%,
            rgba(255, 255, 255, 0.1) 0%,
            transparent 50%
        );
    pointer-events: none;
}

.auth-card {
    background: rgba(255, 255, 255, 0.98);
    padding: 45px 50px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 480px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    position: relative;
    z-index: 1;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-header {
    text-align: center;
    margin-bottom: 35px;
}

.logo-small {
    display: inline-block;
    margin-bottom: 20px;
}

.auth-header h1 {
    font-size: 2rem;
    color: #2d3748;
    margin-bottom: 8px;
    font-weight: 700;
}

.auth-subtitle {
    color: #718096;
    font-size: 0.95rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 8px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group label svg {
    opacity: 0.6;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius);
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
    color: #2d3748;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group textarea {
    resize: vertical;
    font-family: inherit;
}

.form-hint {
    font-size: 0.85rem;
    color: #a0aec0;
    margin-top: 5px;
}

.auth-footer {
    text-align: center;
    margin-top: 25px;
    padding-top: 25px;
    border-top: 1px solid #e2e8f0;
}

.auth-footer p {
    color: #718096;
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.link-primary {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.link-primary:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ==================== */
/* MESSAGES */
/* ==================== */
.message {
    padding: 15px 20px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.error {
    background: rgba(245, 101, 101, 0.1);
    color: #c53030;
    border: 2px solid rgba(245, 101, 101, 0.3);
}

.message.success {
    background: rgba(72, 187, 120, 0.1);
    color: #2f855a;
    border: 2px solid rgba(72, 187, 120, 0.3);
}

.alert {
    padding: 15px 20px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    display: flex;
    align-items: flex-start;
    gap: 15px;
    background: rgba(237, 137, 54, 0.1);
    border: 2px solid rgba(237, 137, 54, 0.3);
    color: #c05621;
}

.alert svg {
    flex-shrink: 0;
    margin-top: 2px;
}

.alert strong {
    display: block;
    margin-bottom: 5px;
}

.alert a {
    color: var(--primary);
    font-weight: 600;
    text-decoration: underline;
}

/* ==================== */
/* BOUTONS */
/* ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--bg-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(102, 126, 234, 0.6);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: rgba(118, 75, 162, 0.1);
    color: var(--secondary);
    border: 2px solid var(--secondary);
}

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

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

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

.btn-success {
    background: var(--success);
    color: white;
    box-shadow: 0 4px 15px rgba(72, 187, 120, 0.4);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(72, 187, 120, 0.6);
}

.btn-full {
    width: 100%;
}

.btn-large {
    padding: 15px 30px;
    font-size: 1.1rem;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn:disabled:hover {
    transform: none;
}

/* ==================== */
/* DASHBOARD */
/* ==================== */
.dashboard-wrapper {
    min-height: 100vh;
    background: var(--bg-gradient);
}

.navbar {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: white;
    font-weight: 700;
    font-size: 1.3rem;
}

.nav-links,
.nav-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: var(--radius);
    transition: background 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.15);
}

.user-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: white;
    font-weight: 600;
}

.user-name {
    color: white;
    font-weight: 600;
}

.btn-logout {
    background: rgba(245, 101, 101, 0.2);
    color: white;
    padding: 8px 16px;
    border-radius: var(--radius);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-logout:hover {
    background: rgba(245, 101, 101, 0.3);
}

.content-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.page-header {
    margin-bottom: 40px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 20px;
}

.page-header h1 {
    font-size: 2.5rem;
    color: white;
    font-weight: 700;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    gap: 15px;
}

.page-subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-top: 10px;
}

/* ==================== */
/* DASHBOARD GRID */
/* ==================== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.action-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 35px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    transition:
        transform 0.3s ease,
        box-shadow 0.3s ease;
}

.action-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.35);
}

.action-card.highlight {
    background: linear-gradient(
        135deg,
        rgba(102, 126, 234, 0.1) 0%,
        rgba(118, 75, 162, 0.1) 100%
    );
    border: 2px solid rgba(102, 126, 234, 0.3);
}

.action-icon {
    width: 70px;
    height: 70px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.action-icon.students {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.action-icon.subjects {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.action-icon.grades {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.action-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #2d3748;
}

.action-card p {
    color: #718096;
    margin-bottom: 20px;
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* ==================== */
/* STATS & CARDS */
/* ==================== */
.stats-section {
    margin-bottom: 40px;
}

.stats-section h2 {
    color: white;
    font-size: 1.8rem;
    margin-bottom: 25px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.stat-code {
    background: var(--bg-gradient);
    color: white;
    padding: 6px 12px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.9rem;
}

.stat-badge {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
}

.stat-card h3 {
    color: #2d3748;
    font-size: 1.1rem;
    margin-bottom: 15px;
}

.stat-moyenne {
    display: flex;
    align-items: baseline;
    gap: 5px;
    margin-bottom: 10px;
}

.moyenne-value {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.moyenne-max {
    font-size: 1.3rem;
    color: #a0aec0;
}

.progress-bar {
    height: 8px;
    background: #e2e8f0;
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--bg-gradient);
    border-radius: 10px;
    transition: width 0.5s ease;
}

/* ==================== */
/* TABLEAUX */
/* ==================== */
.table-container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: var(--bg-gradient);
}

th {
    color: white;
    padding: 18px 20px;
    text-align: left;
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    padding: 18px 20px;
    border-bottom: 1px solid #e2e8f0;
    color: #2d3748;
}

tbody tr:last-child td {
    border-bottom: none;
}

tbody tr {
    transition: background 0.2s ease;
}

tbody tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

.text-center {
    text-align: center !important;
}

.text-muted {
    color: #a0aec0;
    font-size: 0.9rem;
}

/* ==================== */
/* BADGES */
/* ==================== */
.badge-ue,
.badge-code,
.badge-login {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.85rem;
}

.badge-ue {
    background: var(--bg-gradient);
    color: white;
}

.badge-code {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
}

.badge-login {
    background: rgba(118, 75, 162, 0.1);
    color: var(--secondary);
}

.coef-badge {
    background: rgba(237, 137, 54, 0.1);
    color: var(--warning);
    padding: 4px 10px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.85rem;
}

.note-value {
    font-weight: 700;
    font-size: 1.1rem;
    padding: 6px 14px;
    border-radius: 8px;
    display: inline-block;
}

.note-success {
    background: rgba(72, 187, 120, 0.1);
    color: var(--success);
}

.note-danger {
    background: rgba(245, 101, 101, 0.1);
    color: var(--danger);
}

.date-cell {
    color: #718096;
    font-size: 0.9rem;
}

/* ==================== */
/* RECHERCHE */
/* ==================== */
.search-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    margin-bottom: 30px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    flex-wrap: wrap;
    backdrop-filter: blur(10px);
}

.search-form {
    display: flex;
    gap: 15px;
    flex: 1;
    flex-wrap: wrap;
}

.search-input-group {
    position: relative;
    flex: 1;
    min-width: 250px;
}

.search-input-group svg {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #a0aec0;
}

.search-input-group input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.search-input-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.quick-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.search-info {
    background: rgba(102, 126, 234, 0.1);
    padding: 12px 20px;
    border-radius: var(--radius);
    color: var(--primary);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ==================== */
/* FORMULAIRES */
/* ==================== */
.form-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 35px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
}

.create-form,
.grade-form {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.details-section {
    margin-top: 40px;
}

.details-section h2 {
    color: white;
    font-size: 1.8rem;
    margin-bottom: 25px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

/* ==================== */
/* EMPTY STATE */
/* ==================== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.empty-state svg {
    margin-bottom: 20px;
}

.empty-state h3 {
    font-size: 1.5rem;
    color: #2d3748;
    margin-bottom: 10px;
}

.empty-state p {
    color: #718096;
    margin-bottom: 20px;
}

/* ==================== */
/* ACTIONS BOUTONS */
/* ==================== */
.btn-action {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--bg-gradient);
    color: white;
    text-decoration: none;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.btn-action:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

/* ==================== */
/* RESPONSIVE */
/* ==================== */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1.1rem;
    }

    .features {
        grid-template-columns: 1fr;
    }

    .auth-card {
        padding: 35px 30px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .navbar {
        flex-direction: column;
        gap: 15px;
    }

    .nav-links {
        flex-direction: column;
        width: 100%;
    }

    .nav-link {
        width: 100%;
        justify-content: center;
    }

    .page-header {
        flex-direction: column;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .search-section {
        flex-direction: column;
    }

    .search-form {
        width: 100%;
    }

    .quick-actions {
        width: 100%;
        flex-direction: column;
    }

    .quick-actions .btn {
        width: 100%;
    }

    .table-container {
        overflow-x: auto;
    }

    table {
        min-width: 600px;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }

    .cta-buttons .btn {
        width: 100%;
    }
}