/* =============================================
   UniVerse Student Portal — style.css
   Shared across all pages
============================================= */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Sora:wght@700;800&display=swap');

/* --- Token System --- */
:root {
    --navy:      #0f1f3d;
    --navy-mid:  #1a3260;
    --blue:      #2563eb;
    --blue-light:#dbeafe;
    --amber:     #f59e0b;
    --amber-light:#fef3c7;
    --white:     #ffffff;
    --grey-bg:   #f1f5f9;
    --grey-card: #ffffff;
    --grey-text: #64748b;
    --grey-border:#e2e8f0;
    --success:   #16a34a;
    --danger:    #dc2626;
    --radius:    12px;
    --radius-sm: 8px;
    --shadow:    0 2px 12px rgba(15,31,61,0.10);
    --shadow-md: 0 4px 24px rgba(15,31,61,0.14);
    --transition:0.2s ease;
    --font-body: 'Inter', sans-serif;
    --font-display:'Sora', sans-serif;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--grey-bg);
    color: var(--navy);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    font-size: 15px;
    line-height: 1.6;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* =============================================
   NAVBAR
============================================= */

.unv-nav {
    background: var(--navy);
    position: sticky;
    top: 0;
    z-index: 200;
    box-shadow: 0 2px 16px rgba(15,31,61,0.25);
}

.unv-nav .nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    gap: 20px;
}

/* Brand */
.unv-nav .brand {
    font-family: var(--font-display);
    font-size: 1.4rem;
    color: var(--white);
    letter-spacing: -0.5px;
    white-space: nowrap;
}

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

/* Nav links */
.unv-nav .nav-links {
    display: flex;
    list-style: none;
    gap: 4px;
    margin-left: 24px;
}

.unv-nav .nav-links a {
    color: rgba(255,255,255,0.75);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
}

.unv-nav .nav-links a:hover,
.unv-nav .nav-links a.active {
    color: var(--white);
    background: rgba(255,255,255,0.10);
}

.unv-nav .nav-links a.active {
    color: var(--amber);
}

/* Right side actions */
.unv-nav .nav-right {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
}

.unv-nav .nav-right .user-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.85);
    font-size: 0.85rem;
}

.unv-nav .nav-right .user-chip img {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--amber);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    white-space: nowrap;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
    background: var(--blue);
    color: var(--white);
}
.btn-primary:hover { background: #1d4ed8; box-shadow: 0 4px 12px rgba(37,99,235,0.35); }

.btn-amber {
    background: var(--amber);
    color: var(--navy);
}
.btn-amber:hover { background: #d97706; }

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 1.5px solid rgba(255,255,255,0.4);
}
.btn-outline:hover { background: rgba(255,255,255,0.10); border-color: var(--white); }

.btn-outline-dark {
    background: transparent;
    color: var(--navy);
    border: 1.5px solid var(--grey-border);
}
.btn-outline-dark:hover { border-color: var(--blue); color: var(--blue); }

.btn-danger {
    background: var(--danger);
    color: var(--white);
}
.btn-danger:hover { background: #b91c1c; }

.btn-sm { padding: 5px 12px; font-size: 0.82rem; }

/* Hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    margin-left: auto;
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: white;
    border-radius: 2px;
    transition: 0.3s;
}

/* =============================================
   PAGE WRAPPER & FOOTER
============================================= */

.page-body {
    flex: 1;
    padding: 36px 24px 60px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.page-body.wide { max-width: 1200px; }
.page-body.narrow { max-width: 700px; }

footer.unv-footer {
    background: var(--navy);
    color: rgba(255,255,255,0.55);
    text-align: center;
    padding: 16px 24px;
    font-size: 0.82rem;
    margin-top: auto;
}

/* =============================================
   HERO BANNER (about, section headers)
============================================= */

.page-hero {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
    color: var(--white);
    padding: 60px 24px;
    text-align: center;
}

.page-hero h1 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.page-hero p {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.75);
    max-width: 580px;
    margin: 0 auto;
    line-height: 1.7;
}

.page-hero .amber-bar {
    width: 48px;
    height: 4px;
    background: var(--amber);
    border-radius: 2px;
    margin: 16px auto 0;
}

/* =============================================
   CARDS
============================================= */

.card {
    background: var(--grey-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    overflow: hidden;
}

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

.card-body { padding: 24px; }

.card-icon {
    font-size: 2rem;
    margin-bottom: 10px;
    display: block;
}

.card-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--grey-text);
    margin-bottom: 4px;
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 8px;
}

.card-text {
    color: var(--grey-text);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Accent border on top */
.card-accent-blue  { border-top: 3px solid var(--blue); }
.card-accent-amber { border-top: 3px solid var(--amber); }
.card-accent-green { border-top: 3px solid var(--success); }
.card-accent-red   { border-top: 3px solid var(--danger); }

/* =============================================
   GRID HELPERS
============================================= */

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

/* =============================================
   FORMS
============================================= */

.form-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 32px;
    max-width: 560px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--navy);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--grey-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.93rem;
    color: var(--navy);
    background: #fafbfc;
    outline: none;
    transition: border-color var(--transition);
}

.form-control:focus {
    border-color: var(--blue);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.10);
}

.form-control[readonly] {
    background: var(--grey-bg);
    color: var(--grey-text);
    cursor: default;
}

textarea.form-control { resize: vertical; min-height: 110px; }

/* =============================================
   ALERTS / FLASH
============================================= */

.alert {
    padding: 12px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success { background: #dcfce7; color: #14532d; border-left: 4px solid var(--success); }
.alert-danger  { background: #fee2e2; color: #7f1d1d; border-left: 4px solid var(--danger); }
.alert-info    { background: var(--blue-light); color: #1e3a8a; border-left: 4px solid var(--blue); }
.alert-warning { background: var(--amber-light); color: #78350f; border-left: 4px solid var(--amber); }

/* =============================================
   TABLE
============================================= */

.unv-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.unv-table thead {
    background: var(--navy);
    color: var(--white);
}

.unv-table th {
    padding: 13px 18px;
    text-align: left;
    font-weight: 600;
    font-size: 0.82rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.unv-table td {
    padding: 12px 18px;
    border-bottom: 1px solid var(--grey-border);
    color: var(--navy);
}

.unv-table tbody tr:last-child td { border-bottom: none; }
.unv-table tbody tr:hover { background: var(--grey-bg); }

/* =============================================
   BADGE
============================================= */

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.badge-blue   { background: var(--blue-light); color: var(--blue); }
.badge-green  { background: #dcfce7; color: var(--success); }
.badge-amber  { background: var(--amber-light); color: #92400e; }
.badge-grey   { background: var(--grey-bg); color: var(--grey-text); }

/* =============================================
   PROFILE PIC
============================================= */

.profile-pic {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--blue);
    box-shadow: 0 0 0 4px var(--blue-light);
    display: block;
    margin: 0 auto 16px;
}

/* =============================================
   SECTION TITLE
============================================= */

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.4rem, 3vw, 1.9rem);
    color: var(--navy);
    margin-bottom: 6px;
}

.section-subtitle {
    color: var(--grey-text);
    font-size: 0.93rem;
    margin-bottom: 28px;
}

/* =============================================
   BACK LINK
============================================= */

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--grey-text);
    margin-bottom: 24px;
    transition: color var(--transition);
}

.back-link:hover { color: var(--blue); }

/* =============================================
   EMPTY STATE
============================================= */

.empty-state {
    text-align: center;
    padding: 60px 24px;
    color: var(--grey-text);
}

.empty-state .empty-icon { font-size: 3rem; margin-bottom: 12px; }
.empty-state p { font-size: 1rem; }

/* =============================================
   ENROLLED BUTTON STATE
============================================= */

.btn-enrolled {
    background: #f1f5f9;
    color: var(--grey-text);
    cursor: not-allowed;
    border: 1.5px solid var(--grey-border);
    width: 100%;
    justify-content: center;
}

/* =============================================
   RESPONSIVE
============================================= */

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    /* Nav */
    .unv-nav .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--navy);
        padding: 16px 20px 20px;
        gap: 4px;
        z-index: 199;
        box-shadow: 0 8px 20px rgba(15,31,61,0.3);
    }

    .unv-nav .nav-links.open { display: flex; }

    .unv-nav .nav-links a {
        padding: 10px 14px;
        font-size: 1rem;
    }

    .nav-toggle { display: flex; }

    .unv-nav .nav-right .user-chip span { display: none; }

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

    /* Page body */
    .page-body { padding: 24px 16px 48px; }

    /* Form card */
    .form-card { padding: 22px 18px; }

    /* Page hero */
    .page-hero { padding: 40px 20px; }
}

@media (max-width: 480px) {
    .grid-4 { grid-template-columns: 1fr; }

    .unv-nav .nav-inner { padding: 0 16px; }

    .unv-nav .nav-right .btn { padding: 6px 12px; font-size: 0.82rem; }

    .page-hero h1 { font-size: 1.5rem; }
}

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}