/* ========================================
   BTC PAGE - MAIN STYLES
   ======================================== */

/* ===== Tool Navigation ===== */
.tool-nav {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
    position: sticky;
    top: 60px;
    z-index: 40;
    backdrop-filter: blur(12px);
    background: rgba(255, 255, 255, 0.85);
}

.tool-nav .container {
    display: flex;
    align-items: center;
    gap: 20px;
}

.tool-nav-back {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.tool-nav-back:hover {
    color: var(--primary);
}

.tool-nav-title {
    font-weight: 600;
    color: var(--text);
    font-size: 0.9rem;
}

/* ===== Crypto Page ===== */
.crypto-page {
    max-width: 640px;
    margin: 0 auto;
    padding: 24px 0 60px;
}

/* ===== Header ===== */
.crypto-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 28px;
}

.crypto-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.crypto-icon.btc {
    background: linear-gradient(135deg, #fff3e0, #ffd9a8);
    color: #f59e0b;
}

.crypto-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
}

.crypto-header p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin-top: 2px;
}

/* ===== Crypto Card ===== */
.crypto-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 32px;
    box-shadow: var(--shadow);
}

/* ===== Address ===== */
.crypto-address label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.crypto-address-row {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg);
    border: 1.5px solid var(--border);
    border-radius: 12px;
    padding: 10px 14px;
    transition: border-color 0.3s ease;
}

.crypto-address-row:focus-within {
    border-color: #f59e0b;
    box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.08);
}

.crypto-address-row code {
    flex: 1;
    font-size: 0.75rem;
    font-family: 'Courier New', monospace;
    color: var(--text);
    word-break: break-all;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    letter-spacing: 0.02em;
}

.crypto-address-row .copy-btn {
    flex-shrink: 0;
    padding: 6px 16px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #f59e0b, #fbbf24);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.02em;
}

.crypto-address-row .copy-btn:hover {
    transform: scale(1.03);
    box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
}

.crypto-address-row .copy-btn:active {
    transform: scale(0.95);
}

.crypto-address-row .copy-btn.copied {
    background: #10b981;
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
}

/* ===== Network ===== */
.crypto-network {
    margin-top: 16px;
    padding: 14px 18px;
    background: var(--bg);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.crypto-network .network-badge {
    display: inline-block;
    padding: 3px 14px;
    border-radius: 20px;
    background: linear-gradient(135deg, #f59e0b, #fbbf24);
    color: white;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.crypto-network p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

/* ===== Note ===== */
.crypto-note {
    margin-top: 14px;
    padding: 12px 16px;
    background: #fef3c7;
    border-radius: 10px;
    border-left: 4px solid #f59e0b;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.crypto-note svg {
    flex-shrink: 0;
    margin-top: 1px;
    color: #f59e0b;
}

.crypto-note span {
    font-size: 0.85rem;
    color: #78350f;
    line-height: 1.5;
}

/* ===== Back Link ===== */
.crypto-back {
    margin-top: 20px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
}

.back-link:hover {
    color: var(--primary);
}

.back-link svg {
    transition: transform 0.2s;
}

.back-link:hover svg {
    transform: translateX(-4px);
}