/**
 * AbhiHub — app-shell.css
 * Styles for the authenticated app shell:
 * header, main-nav, logo, body class, image popup.
 * These were previously in premium/css/style.css.
 * Depends on: 01_tokens.css
 */

/* ── Body base class ── */
.font-regular {
    font-family: var(--font-primary);
    font-weight: 400;
}

/* ── Header ── */
header {
    width: 100%;
    height: fit-content;
    display: flex;
    position: sticky;
    top: var(--strip-h, 0px);
    z-index: 1000;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid var(--border-light);
    transition: top 0.3s;
}

/* ── Main Nav ── */
.main-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 64px;
    padding: 0 var(--space-6);
    position: relative;
}

/* ── Logo ── */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
    transition: transform var(--transition-fast);
}

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

.logo-text {
    font-size: var(--text-2xl);
    font-weight: 700;
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.025em;
}

/* Kanit font weight helpers (used as classes in templates) */
.kanit-bold     { font-family: var(--font-primary); font-weight: 700; }
.kanit-semibold { font-family: var(--font-primary); font-weight: 600; }
.kanit-medium   { font-family: var(--font-primary); font-weight: 500; }
.kanit-regular  { font-family: var(--font-primary); font-weight: 400; }
.kanit-light    { font-family: var(--font-primary); font-weight: 300; }

/* ── Main content area ── */
main {
    padding: var(--space-6);
    margin-top: var(--space-6);
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
    margin-bottom: var(--space-20);
    max-width: var(--max-content-width);
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 768px) {
    .main-nav { padding: 0 var(--space-4); }
    main       { padding: var(--space-4); margin-top: var(--space-4); gap: var(--space-6); }
}

/* ── Image popup (timetable viewer) ── */
.popup {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    z-index: 2000;
    padding: var(--space-4);
}

.popup .close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-lg);
    font-weight: 600;
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
}

.popup .close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.popup .image {
    max-width: 90%;
    max-height: 90%;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    object-fit: contain;
}