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

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

:root {
    --bg: #f5f5f5;
    --bg-2: #fafafa;
    --text: #000000;
    --text-2: #404040;
    --text-3: #737373;
    --accent: #059669;
    --red: #dc2626;
    --border: #e5e5e5;
    --border-md: #d4d4d4;
    --mono: 'JetBrains Mono', monospace;
    --display: 'Inter', sans-serif;
}

html { font-size: 15px; scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--mono);
    line-height: 1.5;
    min-height: 100vh;
}

/* ============ NAV ============ */
nav {
    position: sticky; top: 0; z-index: 100;
    height: 3.5rem;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 72rem;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
}

.nav-logo {
    display: flex; align-items: center; gap: 0.5rem;
    font-family: var(--display);
    font-size: 1.125rem; font-weight: 600;
    letter-spacing: 0.1em; text-transform: uppercase;
    text-decoration: none; color: var(--text);
}

.logo-mark {
    background: var(--text); color: var(--bg);
    width: 1.75rem; height: 1.75rem;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem;
    animation: logoBeat 3s ease-in-out infinite;
}

@keyframes logoBeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.nav-links { display: flex; gap: 2rem; }

.nav-links a {
    font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em;
    color: var(--text-3); text-decoration: none;
    transition: color 0.2s;
}

.nav-links a:hover, .nav-link-active { color: var(--text); }

.nav-status {
    display: flex; align-items: center; gap: 0.5rem;
    font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--text-3);
}

.live-dot {
    width: 5px; height: 5px;
    background: var(--accent); border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

/* ============ HERO ============ */
.hero {
    max-width: 72rem; margin: 0 auto;
    padding: 4rem 2rem 2.5rem;
    margin-bottom: 3rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2rem;
}

.hero-left {
    display: flex; flex-direction: column; gap: 0.75rem;
}

.hero-left h2 {
    font-family: var(--display);
    font-size: 3.75rem; line-height: 1;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: var(--text);
}

.hero-badge {
    font-family: var(--display); font-size: 0.875rem; font-weight: 600;
    letter-spacing: 0.15em; text-transform: uppercase;
    color: var(--bg); background: var(--text);
    padding: 0.5rem 1rem; width: fit-content;
}

.hero-right { max-width: 28rem; display: flex; flex-direction: column; gap: 1rem; }

.hero-right p {
    font-size: 0.8rem; line-height: 1.6; color: var(--text-2);
}

.hero-divider { border-top: 1px solid var(--border-md); }

.hero-contact { font-size: 0.65rem; color: var(--text-3); display: flex; flex-direction: column; gap: 0.25rem; }

.hero-contact a { color: var(--accent); text-decoration: none; }

/* ============ TABS ============ */
.tabs-bar {
    max-width: 72rem; margin: 0 auto 2rem;
    padding: 0 2rem;
    display: flex; align-items: flex-end; justify-content: space-between;
    border-bottom: 1px solid var(--border-md);
}

.tabs-inner { display: flex; gap: 1.5rem; }

.tab-btn {
    font-family: var(--display); font-size: 0.8rem;
    letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--text-3); background: none; border: none;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.tab-btn:hover { color: var(--text); }

.tab-btn.tab-active {
    color: var(--text);
    border-bottom-color: var(--text);
    transform: none;
}

.tab-btn::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0; right: 0;
    height: 2px;
    background: var(--text);
    transform: scaleX(0);
    transition: transform 0.2s ease;
}

.tab-btn:hover::after { transform: scaleX(1); }

.tab-btn.tab-active::after { display: none; }

.tabs-meta {
    display: flex; align-items: center; gap: 1rem;
    font-size: 0.65rem; letter-spacing: 0.05em;
    color: var(--text-3);
    padding-bottom: 0.5rem;
}

.search-input {
    padding: 0.3rem 0.6rem;
    font-family: var(--mono); font-size: 0.65rem;
    background: var(--bg-2); border: 1px solid var(--border);
    color: var(--text);
    outline: none; width: 180px;
    transition: border-color 0.2s;
}

.search-input:focus { border-color: var(--text); }
.search-input::placeholder { color: var(--text-3); }

.sort-select {
    padding: 0.3rem 0.4rem;
    font-family: var(--mono); font-size: 0.65rem;
    background: var(--bg-2); border: 1px solid var(--border);
    color: var(--text); outline: none;
    cursor: pointer;
}

.stat-vol { font-weight: 500; color: var(--accent); }

/* ============ CONTENT ============ */
main {
    max-width: 72rem; margin: 0 auto;
    padding: 0 2rem 4rem;
}

.content-state { text-align: center; padding: 4rem 0; color: var(--text-3); font-size: 0.8rem; }

.content-state button { margin-top: 1rem; }

.hidden { display: none !important; }

/* Market Card */
.market-card {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding: 1.25rem 1.5rem;
    margin-bottom: 0.5rem;
    background: var(--bg-2);
    border: 1px solid var(--border);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    animation: cardIn 0.35s ease-out backwards;
    cursor: pointer;
}

@keyframes cardIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.market-card:hover {
    border-color: var(--text);
    transform: translateY(-2px) scale(1.005);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.market-card:active {
    transform: translateY(0);
    box-shadow: none;
}

.card-left {
    flex: 0 0 33.33%;
    display: flex; flex-direction: column; gap: 0.2rem;
    min-width: 0;
}

.card-title {
    font-family: var(--display);
    font-size: 1.1rem; font-weight: 500;
    letter-spacing: 0.02em;
    line-height: 1.2;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.card-meta {
    font-size: 0.6rem; color: var(--text-3);
    letter-spacing: 0.04em;
}

.spread-badge {
    color: var(--accent); font-weight: 500;
}

.card-category {
    font-size: 0.65rem; letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-3);
}

.card-center {
    flex: 1;
    display: flex; align-items: center;
    padding: 0 1rem;
}

.card-right {
    flex: 0 0 25%;
    display: flex; flex-direction: column;
    align-items: flex-end; gap: 0.3rem;
    text-align: right;
}

.card-price {
    font-size: 1.5rem; font-weight: 500;
    color: var(--text);
}

.card-change {
    font-size: 0.6rem; letter-spacing: 0.05em;
    text-transform: uppercase;
}

.change-up { color: var(--accent); }
.change-down { color: var(--red); }

.card-volume {
    font-size: 0.6rem; color: var(--text-3); letter-spacing: 0.05em;
}

.card-action {
    margin-top: 0.3rem;
}

.btn-trade {
    padding: 0.2rem 0.6rem;
    font-family: var(--mono); font-size: 0.6rem;
    letter-spacing: 0.05em; text-transform: uppercase;
    color: var(--bg); background: var(--text);
    border: 1px solid var(--text);
    cursor: pointer;
    transition: all 0.15s;
}

.btn-trade:hover { background: var(--accent); border-color: var(--accent); }

.btn-retry {
    padding: 0.5rem 1.2rem;
    font-family: var(--mono); font-size: 0.7rem;
    letter-spacing: 0.05em; text-transform: uppercase;
    color: var(--bg); background: var(--text);
    border: none; cursor: pointer;
    transition: background 0.15s;
}

.btn-retry:hover { background: var(--accent); }

/* Arbitrage card */
.arb-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1rem 1.25rem;
    margin-bottom: 0.5rem;
    background: var(--bg-2);
    border: 1px solid var(--border);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    animation: cardIn 0.35s ease-out backwards;
    cursor: pointer;
}

.arb-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px) scale(1.005);
    box-shadow: 0 4px 12px rgba(5,150,105,0.12);
}

.arb-card:active {
    transform: translateY(0);
    box-shadow: none;
}

.arb-left {
    flex: 0 0 33%;
    display: flex; flex-direction: column; gap: 0.2rem;
    min-width: 0;
}

.arb-platform {
    font-size: 0.6rem; letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent); font-weight: 500;
}

.arb-title {
    font-family: var(--display); font-size: 1rem; font-weight: 500;
    line-height: 1.2;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.arb-center {
    flex: 1;
    display: flex; align-items: center; gap: 2rem;
    font-size: 0.7rem;
}

.arb-price-pair {
    display: flex; align-items: center; gap: 0.5rem;
}

.arb-pm-price, .arb-other-price {
    padding: 0.15rem 0.4rem;
    background: var(--bg);
    border: 1px solid var(--border);
    font-family: var(--mono);
}

.arb-arrow { color: var(--text-3); }

.arb-right {
    flex: 0 0 25%;
    display: flex; flex-direction: column;
    align-items: flex-end; gap: 0.2rem;
    text-align: right;
}

.arb-gap {
    font-size: 1.2rem; font-weight: 500;
    color: var(--accent);
}

.arb-label {
    font-size: 0.6rem; letter-spacing: 0.05em;
    text-transform: uppercase; color: var(--text-3);
}

/* ============ FOOTER ============ */
footer {
    max-width: 72rem; margin: 0 auto;
    padding: 0 2rem 3rem;
    margin-top: 6rem;
}

.footer-line {
    height: 1px; background: var(--border);
    margin-bottom: 2.5rem;
}

.footer-inner {
    display: flex; justify-content: space-between; align-items: center;
    font-size: 0.65rem; color: var(--text-3);
}

.footer-links { display: flex; gap: 2rem; }

.footer-links a {
    color: var(--text-3); text-decoration: none;
    transition: color 0.2s;
}

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

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        padding: 2.5rem 1rem 1.5rem;
    }
    .hero-left h2 { font-size: 2rem; }
    .hero-right { max-width: 100%; }
    .hero-right p { font-size: 0.7rem; }

    .nav-inner { padding: 0 1rem; }
    .nav-links { gap: 1rem; }
    .nav-links a { font-size: 0.65rem; }

    .tabs-bar { padding: 0 1rem; flex-wrap: wrap; gap: 0.5rem; }
    .tabs-meta { flex-wrap: wrap; gap: 0.5rem; }
    .search-input { width: 140px; }
    .tabs-inner { gap: 1rem; }
    .tab-btn { font-size: 0.65rem; }

    main { padding: 0 1rem 2rem; }

    .market-card { flex-direction: column; gap: 0.75rem; padding: 1rem; }
    .card-left, .card-right { flex: 1; width: 100%; }
    .card-center { display: none; }

    .arb-card { flex-direction: column; gap: 0.75rem; padding: 1rem; }
    .arb-left, .arb-right { flex: 1; width: 100%; }
    .arb-center { flex-direction: column; gap: 0.5rem; align-items: flex-start; }
}