:root {
    --bg-color: #0a0b11;
    --nav-bg: #0c0e15;
    --card-bg: #0f111a;
    --border-color: #30363d;
    --text-primary: #e6edf3;
    --text-secondary: #7d8590;
    --accent-color: #2f81f7;
    --hover-bg: #1c2026;
    --success-color: #238636;
    --primary-color: #3b82f6;
    --primary-gradient: linear-gradient(135deg, #3b82f6, #2563eb);
    --secondary-color: #6366f1;
    --dark-bg: #0a0b11;
    --darker-bg: #0c0e15;
    --light-text: #d8d7dc;
    --gray-text: #9ca3af;
    --warning-color: #f59e0b;
    --input-bg: #0c0e15;
    --input-border: 1px solid #555;
    --input-border-radius: 20px;
    --input-focus-border: 2px solid #2195f3;
    --input-hover-border: 2px solid #999;
    --input-padding: 12px;
    --card-border-radius: 22px;
    --card-box-shadow: 0 3px 4px 0 rgba(0, 0, 0, .14), 0 1px 8px 0 rgba(0, 0, 0, .12), 0 3px 3px -2px rgba(0, 0, 0, .4);
    --success-gradient: linear-gradient(135deg, #059669, #10b981);
    --warning-gradient: linear-gradient(135deg, #d97706, #f59e0b);
    --error-gradient: linear-gradient(135deg, #dc2626, #ef4444);
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Navigation */
nav {
    background-color: rgba(12, 14, 21, 0.8) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(48, 54, 61, 0.5);
}

.navbar {
    padding: 1rem 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.navbar-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.25rem;
}

.navbar-brand i {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.navbar-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.navbar-links a {
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
}

.navbar-links a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

/* Main Content */
main {
    flex: 1;
    padding: 6rem 2rem 2rem;
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    margin: 0 0 0.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.page-header p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 1.1rem;
}

/* Form Elements */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

input[type="text"],
input[type="password"],
textarea {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    transition: all 0.2s ease;
    font-size: 14px;
    width: 100%;
    padding: 1rem;
}

input[type="text"]:focus,
input[type="password"]:focus,
textarea:focus {
    border-color: var(--accent-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(47, 129, 247, 0.15);
    background-color: var(--card-bg);
}

.form-control {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    color: #e6edf3;
    background-color: #0a0b11;
    background-clip: padding-box;
    border: 1px solid #30363d;
    border-radius: 0.375rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
    color: #e6edf3;
    background-color: #0a0b11;
    border-color: #2f81f7;
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(47, 129, 247, 0.25);
}

.form-control::placeholder {
    color: #7d8590;
    opacity: 1;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%237d8590' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 16px 12px;
    padding-right: 2.5rem;
}

textarea.form-control {
    min-height: 200px;
    resize: vertical;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    line-height: 1.4;
    background-color: var(--card-bg);
    color: var(--text-primary);
}

.form-text {
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    background-color: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 5px 16px;
    font-size: 14px;
    font-weight: 500;
    line-height: 20px;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    appearance: none;
    transition: all 0.2s ease;
}

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

.btn-primary {
    background-color: var(--success-color);
    border-color: rgba(240, 246, 252, 0.1);
}

.btn-primary:hover {
    background-color: #2ea043;
    border-color: rgba(240, 246, 252, 0.1);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

footer i {
    color: #ef4444;
    margin: 0 0.25rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar-content {
        padding: 0 1rem;
    }

    main {
        padding: 5rem 1rem 1rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

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

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

/* Cards */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    backdrop-filter: blur(10px);
    margin-bottom: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.card-body {
    padding: 1.5rem;
}

/* Info Sections */
.info-section {
    margin-bottom: 1.5rem;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.section-title i {
    color: var(--primary-color);
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem;
    border-radius: 0.5rem;
    transition: background-color 0.2s;
}

.info-item:hover {
    background: rgba(255, 255, 255, 0.03);
}

.info-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.info-value {
    color: var(--text-primary);
    font-family: monospace;
    font-size: 0.9rem;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 0.375rem;
    margin-bottom: 1rem;
}

.alert-error {
    background-color: #dc2626;
    color: white;
}

.alert-success {
    background-color: #16a34a;
    color: white;
}

.alert-warning {
    background-color: #d97706;
    color: white;
}

.alert-info {
    background-color: var(--primary-color);
    color: white;
}

/* Text utilities */
.text-gray {
    color: var(--gray-text) !important;
}

.text-light {
    color: var(--light-text) !important;
}

/* Cards and sections */
.card {
    background-color: var(--card-bg);
    border: none;
    border-radius: var(--card-border-radius);
    box-shadow: var(--card-box-shadow);
}

.card-header {
    background-color: var(--darker-bg);
    border-bottom: 1px solid var(--border-color);
    border-radius: var(--card-border-radius) var(--card-border-radius) 0 0 !important;
}

/* Forms */
.form-control {
    background-color: var(--input-bg);
    border: var(--input-border);
    color: var(--light-text);
    border-radius: var(--input-border-radius);
    padding: var(--input-padding);
}

.form-control:focus {
    background-color: var(--input-bg);
    border: var(--input-focus-border);
    color: var(--light-text);
    box-shadow: 0 0 0 0.25rem rgba(59, 130, 246, 0.25);
}

.form-control:hover {
    border: var(--input-hover-border);
}

.form-text {
    color: var(--gray-text);
}

.form-label {
    font-weight: 500;
    color: var(--light-text);
}

.form-control::placeholder {
    color: var(--gray-text);
}

/* Buttons */
.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--light-text);
}

/* Footer */
.footer {
    background-color: var(--darker-bg);
    padding: 1.5rem 0;
    margin-top: auto;
}

.footer-text {
    color: var(--gray-text);
    font-size: 0.875rem;
}

/* Alerts */
.alert {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--light-text);
}

.alert-success {
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    border-left: 4px solid #ef4444;
}

.alert-info {
    border-left: 4px solid var(--primary-color);
}

/* Info sections (preview page) */
.info-section {
    background: var(--card-bg);
    border-radius: var(--card-border-radius);
    padding: 1.25rem;
    height: 100%;
}

.info-block {
    background: var(--darker-bg);
    border-radius: 6px;
    padding: 1rem;
    margin-bottom: 0.75rem;
    transition: transform 0.2s ease;
}

.info-block:last-child {
    margin-bottom: 0;
}

.info-block:hover {
    transform: translateX(4px);
}

.info-item {
    display: flex;
    align-items: baseline;
    margin-bottom: 0.5rem;
}

.info-item:last-child {
    margin-bottom: 0;
}

.info-label {
    font-weight: 500;
    min-width: 120px;
    margin-right: 1rem;
    color: var(--gray-text);
}

.info-value {
    font-family: 'SF Mono', 'Consolas', monospace;
    font-size: 0.9rem;
    color: var(--light-text);
}

.audio-track {
    border-left: 3px solid var(--primary-color);
}

/* Code blocks */
.code-block {
    background: var(--darker-bg);
    border-radius: 6px;
    padding: 1rem;
}

.code-block pre {
    margin: 0;
    max-height: 500px;
    overflow-y: auto;
}

.code-block code {
    font-family: 'SF Mono', 'Consolas', monospace;
    font-size: 0.9rem;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--gray-text);
}

/* Scrollbar styling */
.code-block pre::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.code-block pre::-webkit-scrollbar-track {
    background: var(--darker-bg);
    border-radius: 4px;
}

.code-block pre::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.code-block pre::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Crypto cards (donate page) */
.crypto-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.crypto-card {
    background: rgba(17, 24, 39, 0.5);
    backdrop-filter: blur(12px);
    border-radius: 1rem;
    border: 1px solid rgba(75, 85, 99, 0.3);
    transition: all 0.3s ease;
    overflow: hidden;
}

.crypto-card:hover {
    border-color: rgba(59, 130, 246, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.crypto-icon {
    width: 96px;
    height: 96px;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

.crypto-card:hover .crypto-icon {
    transform: scale(1.1);
}

.crypto-icon.btc {
    background: linear-gradient(135deg, #f7931a, #ffd700);
}

.crypto-icon.eth {
    background: linear-gradient(135deg, #627eea, #3c3c3d);
}

.crypto-icon.usdc {
    background: linear-gradient(135deg, #2775ca, #2775ca);
}

.crypto-icon.ltc {
    background: linear-gradient(135deg, #345d9d, #b8b8b8);
}

.crypto-icon i {
    font-size: 2.5rem;
    color: white;
}

.crypto-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: white;
    margin-bottom: 0.5rem;
}

.crypto-card input {
    width: 100%;
    padding: 0.75rem 1rem;
    padding-right: 3rem;
    background: rgba(17, 24, 39, 0.8);
    border: 1px solid rgba(75, 85, 99, 0.5);
    border-radius: 0.75rem;
    color: #e5e7eb;
    font-family: 'SF Mono', 'Consolas', monospace;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.crypto-card input:focus {
    outline: none;
    border-color: rgba(59, 130, 246, 0.5);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

.copy-btn {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.5rem;
    color: #9ca3af;
    transition: all 0.2s ease;
    border-radius: 0.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
}

.copy-btn:hover {
    color: #60a5fa;
    background: rgba(59, 130, 246, 0.1);
}

.copy-btn.success {
    color: #34d399;
}

/* Gradient Text */
.gradient-text {
    background: linear-gradient(135deg, #60a5fa, #8b5cf6);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Page Background */
.donate-bg {
    background: linear-gradient(135deg, #111827, #1f2937);
    min-height: 100vh;
}

/* Card Grid */
.crypto-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 1024px;
    margin: 0 auto;
    padding: 2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .crypto-grid {
        grid-template-columns: 1fr;
    }

    .crypto-card {
        margin-bottom: 1.5rem;
    }

    .crypto-icon {
        width: 72px;
        height: 72px;
    }

    .crypto-icon i {
        font-size: 2rem;
    }
}

/* Animation Classes */
.hover-scale {
    transition: transform 0.3s ease;
}

.hover-scale:hover {
    transform: scale(1.05);
}

.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

/* Glassmorphism Effects */
.glass {
    background: rgba(17, 24, 39, 0.5);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass:hover {
    background: rgba(17, 24, 39, 0.6);
    border-color: rgba(59, 130, 246, 0.3);
}

/* Share info section */
.share-info {
    background: var(--darker-bg);
    border-radius: var(--card-border-radius);
    padding: 1.5rem;
}

/* Share Page */
.share-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.share-link {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    overflow: hidden;
}

.share-link-header {
    padding: 0.75rem 1rem;
    font-weight: 500;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

.share-link-content {
    padding: 0.75rem;
    display: flex;
    gap: 0.5rem;
}

.share-link-content input {
    flex: 1;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.375rem;
    padding: 0.5rem 0.75rem;
    color: rgba(255, 255, 255, 0.9);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.copy-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.375rem;
    background: rgba(255, 255, 255, 0.03);
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.2s ease;
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.9);
}

.copy-btn i {
    font-size: 0.875rem;
}

/* Preview Page */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.info-section {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 1rem;
    padding: 1.5rem;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.section-title i {
    color: var(--primary-color);
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem;
    border-radius: 0.5rem;
    transition: background-color 0.2s;
}

.info-item:hover {
    background: rgba(255, 255, 255, 0.03);
}

.info-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.info-value {
    color: var(--text-primary);
    font-family: monospace;
    font-size: 0.9rem;
}

/* Links */
a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: #58a6ff;
    text-decoration: underline;
}

/* Text Colors */
.text-primary {
    color: var(--text-primary);
}

.text-secondary {
    color: var(--text-secondary);
}

/* Background Colors */
.bg-primary {
    background-color: var(--bg-color);
}

.bg-card {
    background-color: var(--card-bg);
}

.bg-nav {
    background-color: var(--nav-bg);
}

/* Borders */
.border-primary {
    border-color: var(--border-color);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

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