@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --dark: #1e293b;
    --dark-light: #334155;
    --dark-lighter: #475569;
    --dark-border: #334155;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --text-secondary: #cbd5e1;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    font-size: 14px;
    line-height: 1.5;
}

/* Flat Design Elements */
.glass {
    background: var(--bg-secondary);
    border: 1px solid var(--dark-border);
}

.glass-strong {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--dark-border);
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border-radius: 4px;
    font-weight: 500;
    font-size: 14px;
    transition: background-color 0.2s ease;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

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

.btn-secondary:hover {
    background: var(--dark-lighter);
}

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

.btn-danger:hover {
    background: #dc2626;
}

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

.btn-success:hover {
    background: #059669;
}

/* Cards */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--dark-border);
    border-radius: 4px;
    padding: 20px;
    transition: border-color 0.2s ease;
}

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

/* Plan Cards */
.plan-card {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(51, 65, 85, 0.4) 100%);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(71, 85, 105, 0.3);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.plan-card:hover {
    border-color: rgba(59, 130, 246, 0.5);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04), 0 0 20px rgba(59, 130, 246, 0.1);
}

/* Inputs */
.input {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--dark-border);
    border-radius: 4px;
    color: var(--text);
    font-size: 14px;
    transition: border-color 0.2s ease;
}

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

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

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(59, 130, 246, 0.1);
    }
    50% {
        box-shadow: 0 0 30px rgba(59, 130, 246, 0.2);
    }
}

.animate-slide-in {
    animation: slideIn 0.6s ease-out;
}

.animate-fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

.animate-glow {
    animation: glow 2s ease-in-out infinite;
}

/* Plan Cards */
.plan-card {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(51, 65, 85, 0.4) 100%);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(71, 85, 105, 0.3);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.plan-card:hover {
    border-color: rgba(59, 130, 246, 0.5);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04), 0 0 20px rgba(59, 130, 246, 0.1);
    transform: translateY(-4px) scale(1.02);
}

/* Responsive Design */
@media (max-width: 768px) {
    .plan-card:hover {
        transform: none;
    }

    .plan-card {
        margin-bottom: 1rem;
    }
}

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

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

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-primary);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--primary);
    transition: width 0.3s ease;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--dark-border);
    padding: 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

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

.footer a:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .card {
        padding: 16px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--dark-lighter);
    border-radius: 2px;
}

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

/* Remove all neon/glow effects */
.neon-text {
    text-shadow: none;
    color: var(--text);
}

/* Alert/Status Box */
.alert {
    background: var(--bg-secondary);
    border: 1px solid var(--dark-border);
    border-radius: 4px;
    padding: 16px;
    color: var(--text);
    font-size: 14px;
}

.alert-info {
    border-left: 3px solid var(--primary);
}

.alert-success {
    border-left: 3px solid var(--success);
}

.alert-warning {
    border-left: 3px solid var(--warning);
}

.alert-error {
    border-left: 3px solid var(--error);
}