:root {
    --bg: #dfd3bd;       /* Màu be trầm, giống giấy thảo cũ */
    --bg2: #d2c4aa;      /* Màu tối hơn một chút cho hiệu ứng nền đổ bóng */
    --text: #2c2a25;     /* Màu mực nâu đen, bớt gắt hơn màu đen thuần */
    --muted: #6b6354;    /* Màu chữ phụ trầm hơn */
    --accent: #8b6b3a;   /* Màu đồng cổ */
    --accent2: #a68b5e;
    --border: rgba(44, 42, 37, 0.15);
    --shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
    --card: rgba(255, 255, 255, 0.25);
}

[data-theme="dark"] {
    --bg: #0f0e0c;
    --bg2: #171512;
    --text: #f0e7d6;
    --muted: #b8ad98;
    --accent: #caa76a;
    --accent2: #8f6e3a;
    --border: rgba(240, 231, 214, 0.16);
    --shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
    --card: rgba(255, 255, 255, 0.05);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Cormorant Garamond", serif;
    background: radial-gradient(circle at 20% 0%, var(--bg2), var(--bg));
    color: var(--text);
    letter-spacing: 0.2px;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: min(1080px, 92%);
    margin: 0 auto;
}

.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(10px);
    background: rgba(242, 234, 216, 0.75);
    border-bottom: 1px solid var(--border);
}

[data-theme="dark"] .nav {
    background: rgba(15, 14, 12, 0.70);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
}

.brand {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.brand .name {
    font-family: "Cormorant Garamond", serif;
    /* Đổi Cinzel thành font này */
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.brand .sub {
    font-size: 13px;
    color: var(--muted);
}

.menu {
    display: flex;
    gap: 18px;
    align-items: center;
    font-size: 15px;
}

.menu a {
    padding: 6px 8px;
    border-radius: 10px;
    transition: 0.2s;
    color: var(--muted);
}

.menu a:hover {
    color: var(--text);
    background: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .menu a:hover {
    background: rgba(255, 255, 255, 0.06);
}

.controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.btn {
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text);
    padding: 8px 10px;
    border-radius: 14px;
    cursor: pointer;
    font-family: inherit;
    font-size: 14px;
    transition: 0.2s;
}

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

.hero {
    padding: 80px 0 60px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: center;
}

@media (max-width: 860px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }
}
.hero h1 {
    font-family: 'Pinyon Script', cursive !important;
    font-weight: 400;
    font-size: clamp(60px, 9vw, 90px); /* Tăng size để bù cho nét mảnh */
    line-height: 1.2;
    color: var(--text);
    margin: 0 0 20px;
    text-transform: none;
    letter-spacing: 1px;
}

.hero p {
    font-size: 20px;
    line-height: 1.6;
    color: var(--muted);
    margin: 0 0 22px;
}

.hero .tagline {
    font-style: italic;
    font-size: 18px;
    opacity: 0.95;
}

.hero-card {
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 18px;
    background: var(--card);
    box-shadow: var(--shadow);
}

.hero-card .frame {
    border: 1px dashed var(--border);
    border-radius: 18px;
    padding: 18px;
    min-height: 240px;
    display: grid;
    place-items: center;
    text-align: center;
    color: var(--muted);
}

.section {
    padding: 60px 0;
    border-top: 1px solid var(--border);
}

.section h2 {
    font-family: "Cinzel", serif;
    letter-spacing: 1px;
    margin: 0 0 14px;
    font-size: 28px;
}

.section p {
    margin: 0;
    font-size: 18px;
    line-height: 1.65;
    color: var(--muted);
}

.grid {
    margin-top: 20px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

@media (max-width: 860px) {
    .grid {
        grid-template-columns: 1fr;
    }
}

.card {
    border: 1px solid var(--border);
    background: var(--card);
    border-radius: 20px;
    padding: 18px;
    transition: 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.card h3 {
    margin: 0 0 8px;
    font-family: "Cinzel", serif;
    font-size: 16px;
    letter-spacing: 0.8px;
}

.card p {
    margin: 0;
    font-size: 16px;
}

.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 15px;
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.footer a {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 4px;
}

.fade {
    opacity: 0;
    transform: translateY(12px);
    transition: 0.8s ease;
}

.fade.show {
    opacity: 1;
    transform: translateY(0);
}