/* ===== VORTEX SWAP — BRUTALIST TERMINAL AESTHETIC ===== */

/* Custom Fonts */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=Instrument+Sans:wght@400;500;600;700&display=swap');

:root {
    /* Dark, industrial palette */
    --bg-void: #050505;
    --bg-surface: #0c0c0c;
    --bg-raised: #141414;
    --bg-elevated: #1c1c1c;
    
    /* Text hierarchy */
    --text-primary: #e8e8e8;
    --text-secondary: #888888;
    --text-muted: #555555;
    
    /* Accent — Electric lime (distinctive, not the usual cyan/purple) */
    --accent: #c8ff00;
    --accent-dim: #a3cc00;
    --accent-glow: rgba(200, 255, 0, 0.15);
    
    /* Status colors */
    --status-success: #00ff88;
    --status-warning: #ffcc00;
    --status-error: #ff4444;
    --status-info: #00ccff;
    
    /* Borders */
    --border-subtle: #222222;
    --border-visible: #333333;
    --border-accent: var(--accent);
    
    /* Typography */
    --font-display: 'Instrument Sans', system-ui, sans-serif;
    --font-mono: 'IBM Plex Mono', 'SF Mono', monospace;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    
    /* Radius — Sharp, minimal */
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 6px;
    
    /* Motion */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --duration-fast: 120ms;
    --duration-normal: 200ms;
}

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

html {
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-display);
    background: var(--bg-void);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
    overflow-x: hidden;
}

input, button, textarea {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
    background: none;
    color: inherit;
}

button {
    cursor: pointer;
}

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

/* ===== Background — Noise texture + grid ===== */
.background-effects {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

/* Subtle noise texture via SVG */
.background-effects::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
}

/* Grid lines */
.grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(var(--border-subtle) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
    background-size: 80px 80px;
    opacity: 0.3;
}

/* Hide the gradient orbs — we don't need them */
.gradient-orb {
    display: none;
}

/* ===== Header ===== */
.header {
    position: relative;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) var(--space-xl);
    max-width: 1200px;
    margin: 0 auto;
    border-bottom: 1px solid var(--border-subtle);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.logo svg {
    display: none; /* Hide the old logo */
}

.logo::before {
    content: '◈';
    font-size: 1.4rem;
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: var(--space-xs);
}

.nav-link {
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    border: 1px solid transparent;
    transition: all var(--duration-fast) var(--ease-out);
}

.nav-link:hover {
    color: var(--text-primary);
    border-color: var(--border-visible);
}

.nav-link.active {
    color: var(--bg-void);
    background: var(--accent);
    border-color: var(--accent);
}

/* ===== Main Content ===== */
.main-content {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: var(--space-2xl) var(--space-lg);
    min-height: calc(100vh - 80px);
}

/* ===== Exchange Card ===== */
.exchange-card {
    width: 100%;
    max-width: 440px;
    background: var(--bg-surface);
    border: 1px solid var(--border-visible);
    padding: var(--space-xl);
    animation: cardEnter 0.4s var(--ease-out);
}

@keyframes cardEnter {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
}

.card-header {
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border-subtle);
}

.card-header h1 {
    font-family: var(--font-mono);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.card-header p {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== Swap Container ===== */
.swap-container {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.swap-section {
    background: var(--bg-raised);
    border: 1px solid var(--border-subtle);
    padding: var(--space-lg);
    transition: border-color var(--duration-fast);
}

.swap-section:focus-within {
    border-color: var(--accent);
}

.section-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.input-group {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.amount-input {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
    background: transparent;
    min-width: 0;
    letter-spacing: -0.02em;
}

.amount-input::placeholder {
    color: var(--text-muted);
}

.amount-input:read-only {
    color: var(--accent);
}

.currency-selector {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    transition: all var(--duration-fast);
    flex-shrink: 0;
}

.currency-selector:hover {
    border-color: var(--accent);
    background: var(--bg-void);
}

.currency-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    object-fit: cover;
}

.chevron {
    color: var(--text-muted);
    transition: transform var(--duration-fast);
}

.currency-selector:hover .chevron {
    color: var(--accent);
}

.input-info {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.min-amount.error {
    color: var(--status-error);
}

.rate-info {
    color: var(--accent);
}

/* ===== Swap Direction Button ===== */
.swap-direction-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-void);
    border: 2px solid var(--border-visible);
    color: var(--text-muted);
    transition: all var(--duration-fast);
}

.swap-direction-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: translate(-50%, -50%) rotate(180deg);
}

/* ===== Address Section ===== */
.address-section {
    margin-top: var(--space-lg);
}

.address-input-wrapper {
    position: relative;
}

.address-input {
    width: 100%;
    padding: var(--space-md);
    background: var(--bg-raised);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    transition: border-color var(--duration-fast);
}

.address-input::placeholder {
    color: var(--text-muted);
    font-family: var(--font-display);
}

.address-input:focus {
    border-color: var(--accent);
}

.address-input.valid {
    border-color: var(--status-success);
}

.address-input.invalid {
    border-color: var(--status-error);
}

.address-validation {
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: 1rem;
}

.extra-id-section {
    margin-top: var(--space-md);
}

.optional {
    color: var(--text-muted);
    font-weight: 400;
    text-transform: none;
}

.refund-section {
    margin-top: var(--space-md);
}

.refund-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color var(--duration-fast);
}

.refund-toggle:hover {
    color: var(--accent);
}

.refund-toggle svg {
    transition: transform var(--duration-fast);
}

.refund-toggle.active svg {
    transform: rotate(45deg);
}

.refund-inputs {
    margin-top: var(--space-md);
}

/* ===== Exchange Button ===== */
.exchange-btn {
    width: 100%;
    margin-top: var(--space-xl);
    padding: var(--space-lg);
    background: var(--accent);
    color: var(--bg-void);
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all var(--duration-fast);
    position: relative;
    overflow: hidden;
}

.exchange-btn:not(:disabled):hover {
    background: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

.exchange-btn:disabled {
    background: var(--bg-elevated);
    color: var(--text-muted);
    cursor: not-allowed;
}

.btn-loader {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 18px;
    height: 18px;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.powered-by {
    text-align: center;
    margin-top: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ===== Transaction View ===== */
.transaction-card {
    width: 100%;
    max-width: 500px;
    background: var(--bg-surface);
    border: 1px solid var(--border-visible);
    padding: var(--space-xl);
    animation: cardEnter 0.4s var(--ease-out);
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-lg);
    background: var(--bg-raised);
    border: 1px solid var(--border-subtle);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    transition: all var(--duration-fast);
}

.back-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-visible);
}

.tx-header {
    text-align: center;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border-subtle);
}

.tx-status-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-raised);
    border: 2px solid var(--accent);
    color: var(--accent);
}

.tx-status-icon.confirming {
    border-color: var(--status-warning);
    color: var(--status-warning);
    animation: pulse 1.5s ease-in-out infinite;
}

.tx-status-icon.exchanging {
    border-color: var(--status-info);
    color: var(--status-info);
    animation: pulse 1.2s ease-in-out infinite;
}

.tx-status-icon.finished {
    border-color: var(--status-success);
    color: var(--status-success);
    background: rgba(0, 255, 136, 0.05);
}

.tx-status-icon.failed,
.tx-status-icon.refunded {
    border-color: var(--status-error);
    color: var(--status-error);
    background: rgba(255, 68, 68, 0.05);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.tx-status-text {
    font-family: var(--font-mono);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.tx-status-desc {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.tx-details {
    background: var(--bg-raised);
    border: 1px solid var(--border-subtle);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.tx-pair {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: var(--space-lg);
}

.tx-currency {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.9rem;
}

.tx-currency img {
    width: 24px;
    height: 24px;
    border-radius: 50%;
}

.tx-arrow {
    color: var(--text-muted);
}

.deposit-address-box {
    margin-bottom: var(--space-md);
}

.deposit-address-box label,
.extra-id-display label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
}

.address-display {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-void);
    border: 1px solid var(--border-subtle);
}

.address-display code {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    word-break: break-all;
    line-height: 1.5;
}

.copy-btn {
    flex-shrink: 0;
    padding: var(--space-sm);
    color: var(--text-muted);
    transition: color var(--duration-fast);
}

.copy-btn:hover {
    color: var(--accent);
}

.copy-feedback {
    position: absolute;
    top: -28px;
    right: 0;
    padding: var(--space-xs) var(--space-sm);
    background: var(--status-success);
    color: var(--bg-void);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    opacity: 0;
    transform: translateY(4px);
    transition: all var(--duration-fast);
    pointer-events: none;
}

.copy-feedback.show {
    opacity: 1;
    transform: translateY(0);
}

.extra-id-display {
    margin-top: var(--space-md);
}

.tx-info-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-subtle);
}

.tx-info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
}

.info-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.info-value.truncate {
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.info-value.link {
    color: var(--accent);
    transition: opacity var(--duration-fast);
}

.info-value.link:hover {
    opacity: 0.8;
}

/* ===== Timeline ===== */
.tx-timeline {
    display: flex;
    justify-content: space-between;
    position: relative;
    padding: 0 var(--space-sm);
}

.tx-timeline::before {
    content: '';
    position: absolute;
    top: 7px;
    left: 20px;
    right: 20px;
    height: 2px;
    background: var(--border-subtle);
}

.timeline-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    position: relative;
    z-index: 1;
}

.step-dot {
    width: 16px;
    height: 16px;
    background: var(--bg-surface);
    border: 2px solid var(--border-subtle);
    transition: all var(--duration-normal);
}

.timeline-step span {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--text-muted);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    max-width: 55px;
}

.timeline-step.active .step-dot {
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

.timeline-step.active span {
    color: var(--accent);
    font-weight: 600;
}

.timeline-step.completed .step-dot {
    background: var(--status-success);
    border-color: var(--status-success);
}

.timeline-step.completed span {
    color: var(--text-secondary);
}

/* ===== Track View ===== */
.track-card {
    width: 100%;
    max-width: 440px;
    background: var(--bg-surface);
    border: 1px solid var(--border-visible);
    padding: var(--space-xl);
    text-align: center;
    animation: cardEnter 0.4s var(--ease-out);
}

.track-card h2 {
    font-family: var(--font-mono);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.track-card p {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
}

.track-input-group {
    display: flex;
    gap: var(--space-sm);
}

.track-input {
    flex: 1;
    padding: var(--space-md);
    background: var(--bg-raised);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    transition: border-color var(--duration-fast);
}

.track-input:focus {
    border-color: var(--accent);
}

.track-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--accent);
    color: var(--bg-void);
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all var(--duration-fast);
}

.track-btn:hover {
    background: var(--text-primary);
    transform: translateY(-2px);
}

/* ===== Currency Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(4px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
    animation: fadeIn 0.15s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
}

.modal-content {
    width: 100%;
    max-width: 400px;
    max-height: 75vh;
    background: var(--bg-surface);
    border: 1px solid var(--border-visible);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: modalEnter 0.2s var(--ease-out);
}

@keyframes modalEnter {
    from {
        opacity: 0;
        transform: scale(0.96);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-subtle);
}

.modal-header h3 {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.modal-close {
    padding: var(--space-sm);
    color: var(--text-muted);
    transition: color var(--duration-fast);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-search {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-raised);
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-subtle);
}

.modal-search input {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.modal-search input::placeholder {
    color: var(--text-muted);
}

.popular-currencies {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border-subtle);
}

.popular-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
}

.popular-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.popular-chip {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    transition: all var(--duration-fast);
}

.popular-chip:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.popular-chip img {
    width: 16px;
    height: 16px;
    border-radius: 50%;
}

.currency-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-sm);
}

.currency-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    cursor: pointer;
    transition: background var(--duration-fast);
}

.currency-item:hover {
    background: var(--bg-raised);
}

.currency-item img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.currency-item-info {
    flex: 1;
    min-width: 0;
}

.currency-item-ticker {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    margin-bottom: 2px;
}

.currency-item-name {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.currency-item-network {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    padding: 2px 6px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    color: var(--text-muted);
    text-transform: uppercase;
}

.no-results {
    padding: var(--space-xl);
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-surface);
    border: 1px solid var(--status-error);
    color: var(--status-error);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    z-index: 200;
    opacity: 0;
    transition: all 0.3s var(--ease-out);
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-surface);
}

::-webkit-scrollbar-thumb {
    background: var(--border-visible);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
    html {
        font-size: 14px;
    }
    
    .header {
        padding: var(--space-md);
    }
    
    .main-content {
        padding: var(--space-lg) var(--space-md);
    }
    
    .exchange-card,
    .transaction-card,
    .track-card {
        padding: var(--space-lg);
    }
    
    .amount-input {
        font-size: 1.5rem;
    }
    
    .tx-pair {
        flex-direction: column;
    }
    
    .tx-arrow {
        transform: rotate(90deg);
    }
    
    .tx-timeline {
        flex-wrap: wrap;
        gap: var(--space-sm);
    }
    
    .tx-timeline::before {
        display: none;
    }
    
    .timeline-step {
        flex-direction: row;
        width: 100%;
        justify-content: flex-start;
        padding: var(--space-sm);
        background: var(--bg-raised);
        border: 1px solid var(--border-subtle);
    }
    
    .timeline-step span {
        max-width: none;
    }
    
    .track-input-group {
        flex-direction: column;
    }
}