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

:root {
    --primary: #f7931a;
    --primary-dark: #d97706;
    --secondary: #4a5568;
    --background: #0f1419;
    --card-bg: #1a1f2e;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --success: #10b981;
    --danger: #ef4444;
    --border: #2d3748;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 16px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(247, 147, 26, 0.2);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.tagline {
    font-size: 1.1rem;
    opacity: 0.95;
}

main {
    display: grid;
    gap: 20px;
    margin-bottom: 40px;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    border: 1px solid var(--border);
}

/* Loading State */
.loading {
    text-align: center;
    padding: 40px;
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto 20px;
    border: 4px solid var(--border);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Price Card */
.price-card {
    text-align: center;
}

.bitcoin-logo {
    font-size: 4rem;
    margin-bottom: 10px;
    color: var(--primary);
}

.price-display {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 20px 0;
    gap: 5px;
}

.currency-symbol {
    font-size: 2rem;
    color: var(--text-muted);
}

.price {
    font-size: 3.5rem;
    font-weight: bold;
    color: var(--primary);
    font-variant-numeric: tabular-nums;
}

.price-change {
    font-size: 1.2rem;
    padding: 8px 16px;
    border-radius: 6px;
    display: inline-block;
    font-weight: 600;
}

.price-change.positive {
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

.price-change.negative {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

.last-update {
    margin-top: 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.donation-cta {
    display: block;
    margin-top: 20px;        /* ← Increased spacing */
    padding: 10px 12px;
    background: rgba(247, 147, 26, 0.1);
    border-radius: 6px;
    transition: all 0.3s ease;
}

.donate-link {
    color: var(--text);      /* ← White color */
    text-decoration: none;   /* ← No underline */
    font-weight: 600;
    transition: all 0.3s ease;
}

.donate-link:hover {
    color: var(--primary);   /* ← Orange on hover */
}

.price-source {
    margin-top: 15px;
    padding: 8px 16px;
    background: rgba(247, 147, 26, 0.1);
    border-radius: 6px;
    display: inline-block;
}

.price-source small {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.price-source span {
    color: var(--primary);
    font-weight: 600;
}

.last-update small {
    opacity: 0.8;
}


/* Converter Card */
.converter-subtitle {
    color: var(--text-muted);
    margin-bottom: 30px;
    text-align: center;
}

.converter-input {
    margin-bottom: 30px;
}

.converter-input label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--text);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-symbol {
    position: absolute;
    left: 20px;
    font-size: 1.5rem;
    color: var(--text-muted);
    pointer-events: none;
}

.converter-input input {
    width: 100%;
    padding: 16px 20px 16px 50px;
    font-size: 1.5rem;
    background: var(--background);
    border: 2px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    transition: border-color 0.3s;
}

.converter-input input:focus {
    outline: none;
    border-color: var(--primary);
}

.conversion-result {
    background: var(--background);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
}

.result-row + .result-row {
    border-top: 1px solid var(--border);
}

.result-label {
    font-size: 1rem;
    color: var(--text-muted);
}

.result-value {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--primary);
    font-variant-numeric: tabular-nums;
}

.quick-amounts {
    margin-top: 20px;
}

.quick-amounts p {
    margin-bottom: 10px;
    color: var(--text-muted);
}

.quick-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.quick-btn {
    flex: 1;
    min-width: 80px;
    padding: 12px 16px;
    background: var(--background);
    border: 2px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.quick-btn:hover {
    border-color: var(--primary);
    background: var(--primary);
    color: var(--background);
    transform: translateY(-2px);
}

/* Info Card */
.info-card h3 {
    color: var(--primary);
    margin-bottom: 15px;
}

.info-card ul {
    margin: 15px 0;
    padding-left: 20px;
}

.info-card li {
    margin: 8px 0;
    color: var(--text-muted);
}

.fun-fact {
    margin-top: 20px;
    padding: 15px;
    background: rgba(247, 147, 26, 0.1);
    border-left: 4px solid var(--primary);
    border-radius: 4px;
}

/* Donation Card */
.donation-card {
    background: linear-gradient(135deg, rgba(247, 147, 26, 0.1) 0%, rgba(217, 119, 6, 0.05) 100%);
    border: 2px solid var(--primary);
}

.donation-card h3 {
    color: var(--primary);
    text-align: center;
    margin-bottom: 10px;
    font-size: 1.8rem;
}

.donation-text {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.donation-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.donation-method {
    background: var(--background);
    padding: 25px;
    border-radius: 10px;
    text-align: center;
    border: 2px solid var(--border);
}

.donation-icon {
    font-size: 3rem;
    margin-bottom: 10px;
}

.donation-method h4 {
    color: var(--text);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.donate-btn {
    width: 100%;
    padding: 14px 24px;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.paypal-btn {
    background: #0070ba;
    color: white;
}

.paypal-btn:hover {
    background: #005a94;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 112, 186, 0.4);
}

.bitcoin-address {
    background: var(--card-bg);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.bitcoin-address code {
    color: var(--primary);
    font-size: 0.9rem;
    word-break: break-all;
    flex: 1;
    min-width: 200px;
    text-align: center;
}

.copy-btn {
    padding: 8px 16px;
    background: var(--primary);
    color: var(--background);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
    white-space: nowrap;
}

.copy-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.copy-btn.copied {
    background: var(--success);
}

.address-note {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 5px;
}

.donation-footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.donation-footer p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Milestones Card */
.milestones-card h3 {
    color: var(--primary);
    margin-bottom: 20px;
}

.milestone-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.milestone-item {
    background: var(--background);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    border: 2px solid var(--border);
    transition: all 0.3s;
}

.milestone-item:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 6px 12px rgba(247, 147, 26, 0.2);
}

.milestone-amount {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--primary);
    margin-bottom: 8px;
}

.milestone-name {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* All Sources Card */
.all-sources-card h3 {
    color: var(--primary);
    margin-bottom: 10px;
}

.sources-subtitle {
    color: var(--text-muted);
    margin-bottom: 25px;
    text-align: center;
    font-size: 0.95rem;
}

.all-sources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.source-item {
    background: var(--background);
    padding: 20px;
    border-radius: 10px;
    border: 2px solid var(--border);
    transition: all 0.3s;
}

.source-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.source-item.active {
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(247, 147, 26, 0.3);
}

.source-item.success {
    border-color: var(--success);
}

.source-item.error {
    border-color: var(--danger);
    opacity: 0.6;
}

.source-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 15px;
}

.source-icon {
    font-size: 0.5rem;
}

.source-name {
    font-weight: 600;
    font-size: 0.8rem;
    color: var(--text);
}

.source-price {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary);
    margin-bottom: 8px;
    font-variant-numeric: tabular-nums;
}

.source-change {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 12px;
    min-height: 20px;
}

.source-change.positive {
    color: var(--success);
}

.source-change.negative {
    color: var(--danger);
}

.trend-container {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.trend {
    font-size: 0.85rem;
    padding: 4px 8px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05);
    font-weight: 600;
    display: inline-block;
}

.trend.positive {
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

.trend.negative {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

.trend.flat {
    color: var(--text-muted);
    background: rgba(148, 163, 184, 0.1);
}

.price-chart {
    width: 100%;
    height: 60px;
    margin: 12px 0;
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.2);
}

.source-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.status-dot.online {
    background: var(--success);
    box-shadow: 0 0 8px var(--success);
    animation: pulse-dot 2s infinite;
}

.status-dot.offline {
    background: var(--danger);
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

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

.sources-footer {
    text-align: center;
    padding-top: 15px;
    border-top: 1px solid var(--border);
}

.sources-footer small {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 30px 20px;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
}

footer p {
    margin: 5px 0;
}

footer a {
    color: var(--primary);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

.disclaimer {
    font-size: 0.85rem;
    opacity: 0.7;
    margin-top: 10px;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .price {
        font-size: 2.5rem;
    }

    .bitcoin-logo {
        font-size: 3rem;
    }

    .card {
        padding: 20px;
    }

    .converter-input input {
        font-size: 1.2rem;
    }

    .quick-buttons {
        gap: 8px;
    }

    .quick-btn {
        min-width: 60px;
        padding: 10px 12px;
        font-size: 0.9rem;
    }

    .milestone-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .donation-methods {
        grid-template-columns: 1fr;
    }

    .bitcoin-address {
        flex-direction: column;
    }

    .bitcoin-address code {
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }

    header {
        padding: 30px 15px;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .tagline {
        font-size: 0.95rem;
    }

    .price {
        font-size: 2rem;
    }

    .milestone-grid {
        grid-template-columns: 1fr;
    }
}

/* Balance Card Styles */
.balance-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.balance-card h3 {
    color: white;
    margin-top: 0;
}

.balance-subtitle {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
}

.balance-loading {
    text-align: center;
    padding: 40px 20px;
}

.balance-loading .spinner {
    border-color: rgba(255, 255, 255, 0.3);
    border-top-color: white;
}

.balance-display {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 25px;
    backdrop-filter: blur(10px);
}

.balance-item {
    text-align: center;
    margin-bottom: 25px;
}

.balance-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.balance-value {
    font-size: 32px;
    font-weight: bold;
    color: white;
    margin-bottom: 8px;
}

.balance-sats {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
}

.balance-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.stat-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 8px;
    text-align: center;
}

.stat-label {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 16px;
    font-weight: 600;
    color: white;
}

.address-link {
    margin-top: 20px;
    text-align: center;
}

.view-explorer-btn {
    display: inline-block;
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.view-explorer-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}