/* ===== Student Portal CSS ===== */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap');

:root {
    --stu-primary: #5D2E8E;
    --stu-secondary: #FF6B35;
    --stu-bg: #f5f5ff;
    --stu-white: #ffffff;
    --stu-text: #2d2d5e;
    --stu-text-dim: #7777aa;
    --stu-shadow: 0 8px 30px rgba(93, 46, 142, 0.1);
    --stu-radius: 16px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Poppins', sans-serif;
    background: var(--stu-bg);
    color: var(--stu-text);
    min-height: 100vh;
}

/* ---- Login ---- */
.stu-login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    background: linear-gradient(135deg, #5D2E8E 0%, #FF6B35 100%);
}

.stu-login-box {
    background: var(--stu-white);
    border-radius: 24px;
    padding: 3rem;
    width: 100%;
    max-width: 420px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.stu-login-box img { width: 80px; margin-bottom: 1rem; border-radius: 50%; }
.stu-login-box h1 { font-size: 1.5rem; margin-bottom: 0.3rem; color: var(--stu-primary); }
.stu-login-box p { color: var(--stu-text-dim); font-size: 0.9rem; margin-bottom: 2rem; }

.stu-login-box input {
    width: 100%;
    padding: 14px 18px;
    margin-bottom: 1rem;
    background: #f8f8ff;
    border: 2px solid #e8e8f5;
    border-radius: 12px;
    color: var(--stu-text);
    font-size: 0.95rem;
    font-family: inherit;
    outline: none;
    transition: border 0.3s;
}
.stu-login-box input:focus { border-color: var(--stu-primary); }

.stu-login-box button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--stu-primary), var(--stu-secondary));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: 0.3s;
}
.stu-login-box button:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(93,46,142,0.3); }

.stu-error { color: #ef5350; font-size: 0.85rem; margin-top: 1rem; display: none; }
.stu-login-box .back-link { display: block; margin-top: 1.5rem; color: var(--stu-text-dim); text-decoration: none; font-size: 0.85rem; }
.stu-login-box .back-link:hover { color: var(--stu-primary); }

/* ---- Dashboard ---- */
.stu-dashboard { display: none; }
.stu-dashboard.active { display: block; }

.stu-topbar {
    background: var(--stu-white);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 50;
}

.stu-topbar .stu-brand { display: flex; align-items: center; gap: 12px; }
.stu-topbar .stu-brand img { width: 40px; border-radius: 50%; }
.stu-topbar .stu-brand h2 { font-size: 1.1rem; color: var(--stu-primary); }

.stu-topbar .stu-user-info { display: flex; align-items: center; gap: 15px; }
.stu-topbar .stu-user-info span { font-size: 0.85rem; color: var(--stu-text-dim); }
.stu-topbar .stu-logout-btn {
    background: none;
    border: 2px solid var(--stu-primary);
    color: var(--stu-primary);
    padding: 6px 16px;
    border-radius: 8px;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.8rem;
    cursor: pointer;
    transition: 0.2s;
}
.stu-topbar .stu-logout-btn:hover { background: var(--stu-primary); color: white; }

.stu-container { max-width: 1200px; margin: 0 auto; padding: 2rem; }

.stu-welcome {
    background: linear-gradient(135deg, var(--stu-primary), var(--stu-secondary));
    color: white;
    border-radius: var(--stu-radius);
    padding: 2rem 2.5rem;
    margin-bottom: 2rem;
}
.stu-welcome h1 { font-size: 1.6rem; margin-bottom: 0.3rem; }
.stu-welcome p { opacity: 0.9; font-size: 0.95rem; }

.stu-section-title {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--stu-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ---- Search Bar ---- */
.stu-search-area {
    margin-bottom: 2rem;
    display: flex;
    gap: 1rem;
    align-items: center;
}

.stu-search-wrapper {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.stu-search-wrapper i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--stu-text-dim);
}

.stu-search-input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    border: 2px solid #e8e8f5;
    border-radius: 12px;
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: 0.3s;
}

.stu-search-input:focus {
    border-color: var(--stu-primary);
    box-shadow: 0 0 0 4px rgba(93, 46, 142, 0.05);
}

/* ---- Table View ---- */
.stu-table-wrapper {
    background: var(--stu-white);
    border-radius: var(--stu-radius);
    box-shadow: var(--stu-shadow);
    overflow: hidden;
    overflow-x: auto;
}

.stu-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.stu-table th {
    background: #f8f8ff;
    padding: 1.2rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--stu-primary);
    border-bottom: 2px solid #eeeeff;
}

.stu-table td {
    padding: 1.2rem;
    font-size: 0.9rem;
    border-bottom: 1px solid #f0f0ff;
    vertical-align: middle;
}

.stu-table tr:last-child td {
    border-bottom: none;
}

.stu-table tr:hover {
    background: #fafaff;
}

.stu-file-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.stu-file-icon {
    width: 45px;
    height: 45px;
    background: #fff0f0;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stu-file-icon i {
    font-size: 1.5rem;
    color: #ef5350;
}

.stu-category-badge {
    display: inline-block;
    padding: 4px 10px;
    background: #f0f0ff;
    color: var(--stu-primary);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.stu-table-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--stu-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
    text-decoration: none;
    white-space: nowrap;
}

.stu-table-btn:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

.no-courses {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--stu-text-dim);
}
.no-courses i { font-size: 3rem; margin-bottom: 1rem; display: block; opacity: 0.3; }

/* ---- Loading Overlay ---- */
.stu-loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.stu-loader-overlay.active {
    display: flex;
}

.stu-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid var(--stu-primary);
    border-radius: 50%;
    animation: stu-spin 1s linear infinite;
}

@keyframes stu-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ---- Pagination ---- */
.stu-pagination {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    align-items: center;
}

.stu-page-btn {
    padding: 8px 16px;
    border: 2px solid #e8e8f5;
    background: var(--stu-white);
    color: var(--stu-text);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
}

.stu-page-btn:hover:not(:disabled) {
    border-color: var(--stu-primary);
    color: var(--stu-primary);
    background: #f8f8ff;
}

.stu-page-btn.active {
    background: var(--stu-primary);
    color: white;
    border-color: var(--stu-primary);
}

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

@media (max-width: 600px) {
    .stu-topbar { padding: 0.8rem 1rem; }
    .stu-topbar .stu-user-info span { display: none; }
    .stu-container { padding: 1rem; }
}