/* ==========================================
   GLOBAL VARIABLES & BASE STYLES
   ========================================== */
:root {
    --bg-body: #f8fafc;
    --text-primary: #0f172a;
    --text-muted: #64748b;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --nav-bg: rgba(255, 255, 255, 0.85);
    --btn-bg: #0f172a;
    --btn-text: #ffffff;
    --btn-hover: #334155;
    --accent-color: #0284c7;
    --shadow-sm: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
}

body.dark-mode {
    --bg-body: #07090e;
    --text-primary: #f8fafc;
    --text-muted: #94a3b8;
    --card-bg: #111827;
    --border-color: #1f293d;
    --nav-bg: rgba(17, 24, 39, 0.85);
    --btn-bg: #38bdf8;
    --btn-text: #0f172a;
    --btn-hover: #7dd3fc;
    --accent-color: #38bdf8;
    --shadow-sm: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Kanit', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.7;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header & Profile Styles */
.business-card-header {
    padding: 3rem 1.5rem 1.5rem 1.5rem;
    max-width: 1100px;
    margin: 0 auto;
}

.header-content {
    display: flex;
    align-items: center;
    gap: 2rem;
    text-align: left;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.profile-avatar {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.header-text h1 {
    font-size: 2.2rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
    color: var(--text-primary);
}

.header-text .subtitle {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 0.8rem;
}

.badge-msu {
    display: inline-block;
    padding: 6px 16px;
    background-color: var(--bg-body);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--accent-color);
}

/* Container & Grid Layouts */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem 4rem 1.5rem;
}

section {
    margin-bottom: 2.5rem;
}

section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.2rem;
    color: var(--text-primary);
}

.section-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

/* Card Modern Design */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 30px -10px rgba(0, 0, 0, 0.12);
}

.card-media {
    width: 100%;
    background-color: #000;
}

.card-media.video-container {
    aspect-ratio: 16 / 9;
}

.card-media.video-container iframe {
    width: 100%;
    height: 100%;
}

.card-media.image-container {
    max-height: 220px;
    overflow: hidden;
}

.card-media.image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

.card:hover .card-media.image-container img {
    transform: scale(1.05);
}

.card-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-badge {
    display: inline-block;
    font-size: 0.75rem;
    padding: 4px 12px;
    background: var(--border-color);
    color: var(--text-primary);
    border-radius: 20px;
    margin-bottom: 10px;
    width: fit-content;
    font-weight: 600;
}

.card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.card-text {
    color: var(--text-muted);
    font-size: 0.95rem;
    white-space: pre-line;
    margin-bottom: 1.2rem;
    flex-grow: 1;
}

/* External Link Button */
.card-external-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    background-color: var(--btn-bg);
    color: var(--btn-text);
    border-radius: 0.75rem;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: opacity 0.2s ease, transform 0.2s ease;
    margin-top: auto;
}

.card-external-btn:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

footer {
    text-align: center;
    padding: 2.5rem 1rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
    background: var(--card-bg);
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 1.5rem;
    }
}