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

:root {
    --c-primary: #087cf8;
    --c-primary-light: #8ad8fc;
    --c-primary-dark: #0a508f;
    --c-support: #ac6853;
    --c-muted: #b5bcc6;
    --c-bg: #f8f9fb;
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.2);
    --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 12px 40px rgba(8, 124, 248, 0.15);
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--c-bg);
    color: #1a1a24;
    letter-spacing: -0.2px;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -1px;
    color: #0d0d12;
}

/* Glassmorphism Navbar */
.glass-nav {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.glass-nav .navbar-brand {
    font-weight: 700;
    color: var(--c-primary) !important;
    letter-spacing: -0.5px;
}
.glass-nav .navbar-brand span {
    color: var(--c-primary-dark);
}
.glass-nav .nav-link {
    font-weight: 500;
    color: #666 !important;
    transition: color 0.2s;
    margin: 0 4px;
}
.glass-nav .nav-link:hover, .glass-nav .nav-link.active {
    color: var(--c-primary) !important;
}

/* Cards & Containers */
.card-soft, .card {
    background: #ffffff;
    border: 1px solid rgba(0,0,0,0.05) !important;
    border-radius: 16px !important;
    box-shadow: var(--shadow-soft) !important;
    overflow: hidden;
}

.card-header {
    background-color: #ffffff !important;
    border-bottom: 1px solid rgba(0,0,0,0.05) !important;
    color: #333 !important;
}

/* Buttons */
.btn-primary {
    background-color: var(--c-primary) !important;
    border-color: var(--c-primary) !important;
    border-radius: 8px !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 14px rgba(8, 124, 248, 0.2) !important;
    transition: all 0.2s ease !important;
}
.btn-primary:hover {
    background-color: var(--c-primary-dark) !important;
    border-color: var(--c-primary-dark) !important;
    box-shadow: var(--shadow-hover) !important;
    transform: translateY(-1px);
}

.btn-success {
    background-color: var(--c-primary) !important;
    border-color: var(--c-primary) !important;
    border-radius: 8px !important;
    font-weight: 600 !important;
}

/* Overrides for text colors */
.text-primary { color: var(--c-primary) !important; }
.text-success { color: var(--c-primary-light) !important; }
.bg-success { background-color: var(--c-primary) !important; }
.bg-primary { background-color: var(--c-primary) !important; }
.bg-dark { background-color: #f0f2f5 !important; color: #333 !important;}

/* Custom list items (macos style) */
.list-group-item-action, .chapter-item, .topic-item {
    border-radius: 6px !important;
    margin-bottom: 2px;
    border: none !important;
    color: #444;
    transition: background 0.15s ease;
}
.list-group-item-action:hover, .chapter-item:hover, .topic-item:hover {
    background-color: #f4f5f7;
}
.list-group-item-action.active-mac, .active-mac, .chapter-item.active, .topic-item.active {
    background-color: #eef6ff !important;
    color: var(--c-primary) !important;
    font-weight: 600;
}

/* Progress bar */
.progress {
    border-radius: 10px;
    background-color: #eef1f5;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.02);
}
.progress-bar {
    background: linear-gradient(90deg, var(--c-primary-light), var(--c-primary));
    border-radius: 10px;
}

/* Reading container for centered textbook */
.reading-container {
    max-width: 710px;
    margin: 0 auto;
}

/* Fix media formatting */
.chapter-text img, .chapter-text video, #slide-media img, #slide-media video, #topic-content img, #topic-content video {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    margin: 1rem 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}

.cursor-pointer {
    cursor: pointer;
}