/* 藝境寰宇・拍賣盛典 Art-Aura Global Auctions - 全域樣式 */
:root {
    --obsidian-black: #080808;
    --auction-gold: #C5A021;
    --marble-grey: #E5E5E5;
    --text-grey: #A0A0A0;
}

body {
    background-color: var(--obsidian-black);
    color: var(--marble-grey);
    font-family: 'Noto Serif TC', serif;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.navbar {
    background-color: rgba(8, 8, 8, 0.95);
    border-bottom: 1px solid rgba(197, 160, 33, 0.3);
    padding: 1.5rem 0;
}

.navbar-brand {
    color: var(--auction-gold) !important;
    font-weight: bold;
    font-size: 1.5rem;
}

.nav-link {
    color: var(--marble-grey) !important;
    margin: 0 15px;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--auction-gold) !important;
}

.btn-gold-outline {
    border: 1px solid var(--auction-gold);
    color: var(--auction-gold);
    background: transparent;
    padding: 10px 25px;
    transition: all 0.5s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-gold-outline:hover {
    color: var(--obsidian-black);
}

.btn-gold-outline::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--auction-gold);
    transition: all 0.5s ease;
    z-index: -1;
}

.btn-gold-outline:hover::before {
    left: 0;
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 2px;
    background: var(--auction-gold);
    margin: 20px auto;
}

footer {
    background-color: #000;
    padding: 4rem 0;
    border-top: 1px solid rgba(197, 160, 33, 0.2);
    margin-top: 5rem;
}

.footer-logo {
    color: var(--auction-gold);
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}

.footer-links a {
    color: var(--text-grey);
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
}

.footer-links a:hover {
    color: var(--auction-gold);
}

/* 垂直排版美學輔助類 */
.vertical-text {
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

/* 極簡細線 */
.thin-line {
    height: 1px;
    background: rgba(229, 229, 229, 0.1);
    width: 100%;
    margin: 2rem 0;
}