/* Modern Design System - Inspired by devx.fun */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #13131a;
    --bg-card: #1a1a24;
    --bg-card-hover: #20202d;
    --accent-primary: #7c3aed;
    --accent-secondary: #a78bfa;
    --accent-gradient: linear-gradient(135deg, #7c3aed 0%, #a78bfa 100%);
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --border-color: #2d2d3a;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', 'Roboto', sans-serif;
    background: var(--bg-primary);
    background-image: 
        radial-gradient(at 0% 0%, rgba(124, 58, 237, 0.1) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(167, 139, 250, 0.1) 0px, transparent 50%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
header {
    padding: 30px 0;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

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

/* Navigation Tabs */
.tabs {
    display: flex;
    gap: 8px;
    background: var(--bg-secondary);
    padding: 8px;
    border-radius: 16px;
    margin-bottom: 30px;
    overflow-x: auto;
}

.tab-button {
    flex: 1;
    padding: 12px 24px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 12px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.tab-button:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.tab-button.active {
    background: var(--accent-gradient);
    color: white;
}

/* Main Content */
main {
    min-height: 60vh;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group small {
    display: block;
    margin-top: 6px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group input[type="url"],
.form-group input[type="file"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group input[type="number"]:focus,
.form-group input[type="url"]:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: var(--bg-card);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(124, 58, 237, 0.4);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-danger {
    background: var(--error);
    color: white;
}

.btn-warning {
    background: var(--warning);
    color: white;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Wallet Cards */
.wallet-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
    transition: all 0.3s ease;
}

.wallet-card:hover {
    background: var(--bg-card-hover);
    transform: translateX(4px);
}

.wallet-card.selected {
    border-color: var(--accent-primary);
    background: var(--bg-card-hover);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
}

table th,
table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

table th {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

table td {
    color: var(--text-primary);
}

table tr:hover {
    background: var(--bg-card-hover);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.badge-error {
    background: rgba(239, 68, 68, 0.2);
    color: var(--error);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

.badge-info {
    background: rgba(124, 58, 237, 0.2);
    color: var(--accent-secondary);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 30px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h2 {
    color: var(--text-primary);
    font-size: 1.5rem;
}

.close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Headings */
h2 {
    color: var(--text-primary);
    font-size: 1.8rem;
    margin-bottom: 20px;
    font-weight: 600;
}

h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin-bottom: 15px;
    font-weight: 600;
}

h4 {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 12px;
    font-weight: 500;
}

/* Login Page Specific */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 48px;
    max-width: 480px;
    width: 100%;
    text-align: center;
}

.login-card h1 {
    font-size: 2.5rem;
    margin-bottom: 12px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-card p {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 1.05rem;
}

.google-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 14px 24px;
    background: white;
    color: #1f2937;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.google-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 255, 255, 0.2);
}

.features-list {
    margin-top: 40px;
    text-align: left;
}

.features-list h3 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.feature-item::before {
    content: "✓";
    color: var(--success);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Links */
.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}

.footer-links a {
    color: var(--accent-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

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

/* Loading spinner */
.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

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

/* Responsive */
@media (max-width: 768px) {
    .tabs {
        flex-wrap: wrap;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .login-card {
        padding: 32px 24px;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.flex {
    display: flex;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.gap-10 {
    gap: 10px;
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}