/* OnlyBTC.ai - Main Stylesheet v4.0 */
/* 硬核极简主义 - 暖色乳白背景主题 */
/* 强调信息的易读性与留白感 */

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

:root {
    /* 主色调 */
    --btc-orange: #F7931A;
    --hover-orange: #FF9F2E;
    
    /* 背景色 - 暖色乳白主题 */
    --warm-white: #FFFAF5;
    --light-cream: #FFF8F0;
    --card-bg: #FFFFFF;
    
    /* 文字颜色 - 黑灰体系 */
    --title-black: #000000;
    --content-gray: #333333;
    --original-gray: #777777;
    --light-text: #999999;
    
    /* Footer - 深色底部 */
    --footer-black: #000000;
    --footer-dark: #1A1A1A;
    
    /* 边框 */
    --border-light: #E8DDD0;
    --border-hover: #F7931A;
    --border-orange: rgba(247, 147, 26, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, 
                 'Noto Sans', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--warm-white);
    color: var(--content-gray);
    line-height: 1.8;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 3rem;
}

/* ==================== HEADER ==================== */
.main-header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 250, 245, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 2px solid var(--border-light);
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.main-header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 3rem;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.logo:hover {
    opacity: 0.85;
}

.logo-image {
    height: 40px;
    width: auto;
}

.nav-center {
    display: flex;
    gap: 0;
    list-style: none;
    margin: 0 auto;
}

.nav-center a {
    color: var(--content-gray);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.45rem 0.85rem;
    border-bottom: 2px solid transparent;
}

.nav-center a:hover {
    color: var(--btc-orange);
    border-bottom-color: var(--btc-orange);
}

.nav-center a.active {
    color: var(--btc-orange);
    border-bottom-color: var(--btc-orange);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 0.2rem;
    flex-shrink: 0;
}

.nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--content-gray);
    text-decoration: none;
    font-size: 0.88rem;
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
    transition: all 0.3s ease;
    font-weight: 500;
    border: 1px solid transparent;
    background: none;
    cursor: pointer;
    white-space: nowrap;
}

.nav-btn:hover {
    color: var(--btc-orange);
    background: rgba(247, 147, 26, 0.08);
    border-color: var(--border-light);
}

.nav-btn.primary {
    background: var(--btc-orange);
    color: #FFFFFF;
    font-weight: 700;
    border-color: var(--btc-orange);
}

.nav-btn.primary:hover {
    background: var(--hover-orange);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(247, 147, 26, 0.3);
}

.lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.4rem 0.75rem;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    color: var(--content-gray);
    background: var(--card-bg);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.88rem;
    white-space: nowrap;
}

.lang-switch:hover {
    border-color: var(--btc-orange);
    color: var(--btc-orange);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--btc-orange);
    font-size: 1.8rem;
    cursor: pointer;
}

/* 导航分割线 */
.nav-divider {
    width: 1px;
    height: 16px;
    background: var(--border-light);
    margin: 0 0.15rem;
    flex-shrink: 0;
}

/* 订阅按钮 — 橙色实底，置于最右 */
.nav-btn-subscribe {
    display: inline-flex;
    align-items: center;
    background: var(--btc-orange);
    color: #FFFFFF !important;
    font-weight: 700;
    font-size: 0.9rem;
    padding: 0.42rem 1.1rem;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.3s ease;
    white-space: nowrap;
    flex-shrink: 0;
}

.nav-btn-subscribe:hover {
    background: var(--hover-orange);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(247, 147, 26, 0.3);
}

/* ==================== SECTIONS ==================== */
.hero {
    margin-top: 64px;
    padding: 2.8rem 0 1.8rem;
    text-align: center;
    background: var(--warm-white);
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--title-black);
    margin-bottom: 0.7rem;
    letter-spacing: -1px;
    line-height: 1.15;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--original-gray);
    margin-bottom: 1.2rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1.2rem;
    justify-content: center;
}

.section-padding {
    padding: 5rem 0;
}

.bg-light {
    background: var(--light-cream);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--title-black);
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 4px;
    background: var(--btc-orange);
}

.view-more {
    color: var(--btc-orange);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-bottom: 2px solid transparent;
}

.view-more:hover {
    color: var(--hover-orange);
    border-bottom-color: var(--hover-orange);
}

/* ==================== BUTTONS ==================== */
.btn {
    padding: 1.1rem 2.8rem;
    font-size: 1rem;
    font-weight: 700;
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--btc-orange);
    color: #FFFFFF;
    border-color: var(--btc-orange);
}

.btn-primary:hover {
    background: var(--hover-orange);
    border-color: var(--hover-orange);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(247, 147, 26, 0.3);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--btc-orange);
    border-color: var(--btc-orange);
}

.btn-secondary:hover {
    background: rgba(247, 147, 26, 0.05);
    border-color: var(--hover-orange);
}

.btn-lg {
    padding: 1.3rem 3rem;
    font-size: 1.1rem;
}

.btn-full {
    width: 100%;
}

/* ==================== CARDS WITH BOTTOM BORDER ==================== */
.opinion-card,
.featured-card,
.resource-card,
.metric-card,
.article-card,
.service-card {
    background: var(--card-bg);
    border: 1px solid var(--border-light);
    border-bottom: 3px solid var(--border-light);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.opinion-card:hover,
.featured-card:hover,
.resource-card:hover,
.metric-card:hover,
.article-card:hover,
.service-card:hover {
    border-bottom-color: var(--btc-orange);
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(247, 147, 26, 0.12);
}

/* ==================== OPINIONS ==================== */
.opinions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 2rem;
}

.opinion-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--btc-orange), transparent);
}

.author-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--btc-orange), var(--hover-orange));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #FFFFFF;
}

.author-details h3 {
    color: var(--title-black);
    font-size: 1.1rem;
}

.author-tag {
    background: rgba(247, 147, 26, 0.1);
    color: var(--btc-orange);
    padding: 0.2rem 0.7rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

.opinion-content-zh {
    color: var(--title-black);
    font-size: 1.05rem;
    line-height: 1.9;
    margin-bottom: 1rem;
}

.opinion-content-en {
    color: var(--original-gray);
    font-size: 0.95rem;
    line-height: 1.7;
    font-style: italic;
    padding-left: 1rem;
    border-left: 3px solid rgba(247, 147, 26, 0.2);
}

.opinion-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-light);
}

.opinion-source {
    color: var(--btc-orange);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.opinion-source:hover {
    border-bottom-color: var(--btc-orange);
}

.opinion-time {
    color: var(--light-text);
    font-size: 0.85rem;
}

/* ==================== DASHBOARD ==================== */
.dashboard-mini {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.metric-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.metric-label {
    color: var(--content-gray);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
    font-weight: 600;
}

.metric-value {
    color: var(--btc-orange);
    font-size: 2.5rem;
    font-weight: 700;
    font-family: 'Courier New', monospace;
    margin-bottom: 0.5rem;
}

.metric-change {
    color: var(--content-gray);
    font-size: 0.95rem;
    font-weight: 600;
}

.metric-change.positive {
    color: #10B981;
}

/* ==================== FEATURED ==================== */
.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.featured-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #FFF8F0, #FFE8D6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    border-bottom: 1px solid var(--border-light);
}

.featured-content {
    padding: 2rem;
}

.featured-badge {
    background: var(--btc-orange);
    color: #FFFFFF;
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 1rem;
}

.featured-content h3 {
    color: var(--title-black);
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.featured-content p {
    color: var(--content-gray);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.read-more {
    color: var(--btc-orange);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.read-more:hover {
    border-bottom-color: var(--btc-orange);
}

/* ==================== RESOURCES ==================== */
.resources-preview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.resource-badge {
    background: var(--btc-orange);
    color: #FFFFFF;
    padding: 0.4rem 1rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 1.5rem;
}

.resource-badge.premium {
    background: linear-gradient(135deg, #FFD700, #FFA500);
}

.resource-card h3 {
    color: var(--title-black);
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.resource-card p {
    color: var(--content-gray);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.resource-link {
    color: var(--btc-orange);
    text-decoration: none;
    font-weight: 700;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.resource-link:hover {
    border-bottom-color: var(--btc-orange);
}

/* ==================== MISSION CARDS ==================== */
.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
}

.mission-card {
    padding: 2.5rem;
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border-light);
    border-bottom: 3px solid var(--border-light);
    transition: all 0.3s ease;
}

.mission-card:hover {
    border-bottom-color: var(--btc-orange);
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(247, 147, 26, 0.12);
}

.mission-card h3 {
    color: var(--btc-orange);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.mission-card p {
    color: var(--content-gray);
    line-height: 1.9;
    font-size: 1.05rem;
}

/* ==================== FOOTER ==================== */
.main-footer {
    background: var(--footer-black);
    color: #FFFFFF;
    padding: 4rem 0 2rem;
    margin-top: 5rem;
}

.footer-motto {
    font-size: 1.6rem;
    color: var(--btc-orange);
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
    font-family: 'Courier New', monospace;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    color: #FFFFFF;
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.7rem;
}

.footer-section a {
    color: #CCCCCC;
    text-decoration: none;
    transition: color 0.3s ease;
    border-bottom: 1px solid transparent;
}

.footer-section a:hover {
    color: var(--btc-orange);
    border-bottom-color: var(--btc-orange);
}

.footer-section p {
    color: #CCCCCC;
    line-height: 1.7;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--footer-dark);
    color: #999999;
    font-size: 0.9rem;
}

/* ==================== PAGE HEADER ==================== */
.page-header {
    margin-top: 70px;
    padding: 4rem 0 3rem;
    text-align: center;
    background: var(--warm-white);
    border-bottom: 2px solid var(--border-light);
}

.page-header h1 {
    font-size: 3rem;
    color: var(--title-black);
    margin-bottom: 1rem;
}

.page-subtitle {
    font-size: 1.1rem;
    color: var(--content-gray);
}

/* ==================== CTA SECTION ==================== */
.cta-section {
    background: var(--light-cream);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    color: var(--title-black);
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.2rem;
    color: var(--content-gray);
    margin-bottom: 2rem;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }
    
    .nav-center {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .opinions-grid,
    .featured-grid,
    .resources-preview,
    .mission-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-mini {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .dashboard-mini {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
}


/* ==================== 首页三列文章（V5基础新增） ==================== */
.home-three-col {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1.5rem;
    padding: 1.5rem 0 2.5rem;
}

.hac {
    background: var(--card-bg);
    border: 1px solid var(--border-light);
    border-bottom: 3px solid var(--border-light);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    text-decoration: none;
    color: inherit;
    display: block;
}

.hac:hover {
    border-bottom-color: var(--btc-orange);
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(247,147,26,0.12);
}

.hac-head {
    padding: 1.2rem 1.2rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.hac-avatar {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--btc-orange), var(--hover-orange));
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; color: #FFF; font-size: 0.78rem; flex-shrink: 0;
}

.hac-author { font-weight: 700; color: var(--title-black); font-size: 0.9rem; }

.hac-tag {
    display: inline-block; margin-top: 0.15rem;
    font-size: 0.68rem; color: var(--btc-orange);
    background: rgba(247,147,26,0.1);
    padding: 0.1rem 0.45rem; border-radius: 3px; font-weight: 600;
}

.hac-badge {
    margin-left: auto; flex-shrink: 0;
    font-size: 0.62rem; color: var(--original-gray);
    background: #F5F0EB;
    padding: 0.1rem 0.45rem; border-radius: 3px;
    font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px;
}

.hac-badge.orig { color: var(--btc-orange); background: rgba(247,147,26,0.08); }

.hac-body { padding: 0.8rem 1.2rem 1.1rem; }

.hac-zh {
    color: var(--title-black); font-size: 0.9rem; line-height: 1.75;
    margin-bottom: 0.6rem;
    display: -webkit-box; -webkit-line-clamp: 3;
    -webkit-box-orient: vertical; overflow: hidden;
}

.hac-en {
    color: var(--original-gray); font-size: 0.8rem; line-height: 1.6;
    font-style: italic; padding-left: 0.8rem;
    border-left: 2px solid rgba(247,147,26,0.25);
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
    margin-bottom: 0.75rem;
}

.hac-foot {
    display: flex; justify-content: space-between; align-items: center;
    padding-top: 0.75rem; border-top: 1px solid var(--border-light);
}

.hac-source { color: var(--btc-orange); font-size: 0.78rem; font-weight: 600; }
.hac-time   { color: var(--light-text); font-size: 0.72rem; }

/* ==================== 数据页图表（V5基础新增） ==================== */
.ahr-block {
    background: var(--card-bg);
    border: 2px solid var(--btc-orange);
    border-radius: 12px; padding: 1.5rem;
    text-align: center; margin-bottom: 1.5rem;
    box-shadow: 0 4px 16px rgba(247,147,26,0.1);
}
.ahr-lbl { font-size: 0.75rem; color: var(--original-gray); text-transform: uppercase; letter-spacing: 1px; font-weight: 600; margin-bottom: 0.4rem; }
.ahr-val { font-size: 3.2rem; font-weight: 900; color: var(--btc-orange); font-family:'Courier New',monospace; line-height: 1.1; }
.ahr-status { font-size: 0.9rem; font-weight: 700; color: var(--btc-orange); margin-top: 0.3rem; }
.ahr-desc   { font-size: 0.78rem; color: var(--original-gray); margin-top: 0.25rem; }

.ahr-zones {
    display: grid; grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem; margin-bottom: 1.5rem;
}
.ahr-zone { border-radius: 10px; padding: 1rem; text-align: center; border: 1.5px solid transparent; }
.ahr-zone.z-buy  { background: rgba(16,185,129,0.06); border-color: rgba(16,185,129,0.25); }
.ahr-zone.z-dca  { background: rgba(247,147,26,0.06); border-color: rgba(247,147,26,0.25); }
.ahr-zone.z-hold { background: rgba(239,68,68,0.06);  border-color: rgba(239,68,68,0.25); }
.ahr-zone .z-ico  { font-size: 1.5rem; margin-bottom: 0.25rem; }
.ahr-zone .z-name { font-size: 0.82rem; font-weight: 700; }
.ahr-zone.z-buy  .z-name { color: #10B981; }
.ahr-zone.z-dca  .z-name { color: var(--btc-orange); }
.ahr-zone.z-hold .z-name { color: #EF4444; }
.ahr-zone .z-rng  { font-size: 0.73rem; color: var(--original-gray); font-family:'Courier New',monospace; margin-top: 0.15rem; }

.chart-card-v8 {
    background: var(--card-bg);
    border: 1px solid var(--border-light);
    border-bottom: 3px solid var(--border-light);
    border-radius: 12px; padding: 1.5rem; margin-bottom: 1.5rem;
    transition: all 0.3s;
}
.chart-card-v8:hover { border-bottom-color: var(--btc-orange); }
.chart-card-v8 h4 {
    font-size: 0.95rem; color: var(--title-black); font-weight: 700;
    margin-bottom: 1rem; display: flex; align-items: center; gap: 0.5rem;
}
.c-badge { font-size: 0.62rem; background: rgba(247,147,26,0.1); color: var(--btc-orange); padding: 0.1rem 0.45rem; border-radius: 3px; font-weight: 700; text-transform: uppercase; }

.charts-two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }

.metrics-row {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1rem; margin-bottom: 1.5rem;
}
.m-card-v8 {
    background: var(--card-bg); border: 1px solid var(--border-light);
    border-bottom: 3px solid var(--border-light);
    border-radius: 10px; padding: 1.2rem; text-align: center; transition: all 0.3s;
}
.m-card-v8:hover { border-bottom-color: var(--btc-orange); transform: translateY(-3px); box-shadow: 0 6px 16px rgba(247,147,26,0.1); }
.m-card-v8 .m-ico { font-size: 1.5rem; margin-bottom: 0.3rem; }
.m-card-v8 .m-lbl { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.8px; color: var(--original-gray); font-weight: 600; margin-bottom: 0.3rem; }
.m-card-v8 .m-val { font-size: 1.4rem; font-weight: 700; color: var(--btc-orange); font-family: 'Courier New', monospace; }
.m-card-v8 .m-sub { font-size: 0.72rem; color: var(--content-gray); margin-top: 0.15rem; }
.m-card-v8 .m-sub.pos { color: #10B981; }
.m-card-v8 .m-sub.neg { color: #EF4444; }

.data-sub-title {
    font-size: 1.3rem; font-weight: 700; color: var(--title-black);
    margin: 2.5rem 0 1.2rem; padding-bottom: 0.6rem;
    border-bottom: 2px solid var(--border-light);
    display: flex; align-items: center; gap: 0.5rem;
}
.data-sub-title::before {
    content: ''; width: 4px; height: 1.1em;
    background: var(--btc-orange); border-radius: 2px; flex-shrink: 0;
}

canvas.c-canvas { width: 100% !important; height: 180px !important; display: block; }

@media (max-width: 1024px) {
    .home-three-col  { grid-template-columns: 1fr 1fr; }
    .charts-two-col  { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .home-three-col  { grid-template-columns: 1fr; }
    .ahr-zones       { grid-template-columns: 1fr; }
    .metrics-row     { grid-template-columns: repeat(2, 1fr); }
    .nav-center      { display: none; }
    .mobile-menu-btn { display: block; }
}