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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #e0e0e0;
    background: #0a0a0a;
    min-height: 100vh;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(16, 185, 129, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(5, 150, 105, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(16, 185, 129, 0.08) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* App Container */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 1;
}

/* Usage Stats */
.usage-stats {
    background: rgba(17, 17, 17, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 12px;
    padding: 16px 24px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.usage-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.tier-badge {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75em;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.tier-badge.pro {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.btn-upgrade {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 0.95em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-upgrade:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
}

/* Upgrade Page Styles */
.upgrade-section {
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin: 32px 0;
}

.pricing-card {
    background: rgba(17, 17, 17, 0.8);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 32px;
    position: relative;
    transition: all 0.3s ease;
}

.pricing-card.featured {
    border-color: rgba(16, 185, 129, 0.5);
    box-shadow: 0 8px 32px rgba(16, 185, 129, 0.2);
    transform: scale(1.05);
}

.pricing-card .badge {
    position: absolute;
    top: -12px;
    right: 24px;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.75em;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.tier-header {
    text-align: center;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.tier-header h3 {
    font-size: 1.5em;
    margin-bottom: 8px;
    color: #10b981;
}

.price {
    font-size: 3em;
    font-weight: 700;
    color: #fff;
}

.price span {
    font-size: 0.4em;
    color: #aaa;
    font-weight: 400;
}

.features {
    list-style: none;
    margin: 24px 0;
    padding: 0;
}

.features li {
    padding: 12px 0;
    color: #e0e0e0;
    font-size: 0.95em;
}

.payment-card, .success-card {
    background: rgba(17, 17, 17, 0.8);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 16px;
    padding: 32px;
    max-width: 500px;
    margin: 32px auto;
}

#card-element {
    background: rgba(255, 255, 255, 0.05);
    padding: 16px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin: 24px 0;
}

#card-errors {
    color: #ef4444;
    margin: 12px 0;
    font-size: 0.9em;
}

.success-card {
    text-align: center;
}

.success-card h3 {
    color: #10b981;
    font-size: 2em;
    margin-bottom: 16px;
}

.faq-section {
    margin-top: 64px;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.faq-section h3 {
    text-align: center;
    font-size: 1.8em;
    margin-bottom: 32px;
    color: #10b981;
}

.faq-item {
    background: rgba(17, 17, 17, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 16px;
}

.faq-item h4 {
    color: #10b981;
    margin-bottom: 8px;
    font-size: 1.1em;
}

.faq-item p {
    color: #ccc;
    line-height: 1.6;
}

/* Header */
.app-header {
    background: rgba(17, 17, 17, 0.8);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 16px;
    padding: 24px 32px;
    margin-bottom: 32px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

.app-header h1 {
    color: #10b981;
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    text-shadow: 0 0 30px rgba(16, 185, 129, 0.3);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-info span {
    font-weight: 600;
    color: #d1d5db;
    font-size: 0.95rem;
}

/* Main Content */
.main-content {
    display: grid;
    gap: 24px;
}

/* Sections */
section {
    background: rgba(17, 17, 17, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(16, 185, 129, 0.15);
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease;
}

section:hover {
    border-color: rgba(16, 185, 129, 0.3);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5);
}

section h2 {
    color: #10b981;
    margin-bottom: 24px;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* Profile Section */
.profile-card {
    background: rgba(0, 0, 0, 0.4);
    padding: 24px;
    border-radius: 12px;
    border-left: 3px solid #10b981;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.profile-summary {
    margin-bottom: 24px;
}

.profile-summary p {
    margin: 12px 0;
    font-size: 1rem;
    color: #d1d5db;
}

.profile-summary strong {
    color: #10b981;
    display: inline-block;
    min-width: 180px;
    font-weight: 600;
}

/* Advisor Section */
.advisor-card {
    background: rgba(0, 0, 0, 0.4);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.question-input {
    margin-bottom: 20px;
}

.question-input textarea {
    width: 100%;
    padding: 16px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    margin-bottom: 16px;
    color: #e0e0e0;
    transition: all 0.3s ease;
}

.question-input textarea::placeholder {
    color: #6b7280;
}

.question-input textarea:focus {
    outline: none;
    border-color: #10b981;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
    background: rgba(0, 0, 0, 0.8);
}

/* Loading Indicator */
.loading-indicator {
    text-align: center;
    padding: 40px;
    color: #10b981;
}

.spinner {
    border: 3px solid rgba(16, 185, 129, 0.1);
    border-top: 3px solid #10b981;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}

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

/* Advice Response */
.advice-response {
    background: rgba(16, 185, 129, 0.05);
    padding: 28px;
    border-radius: 12px;
    border: 1px solid rgba(16, 185, 129, 0.3);
    margin-top: 24px;
    box-shadow: 0 4px 24px rgba(16, 185, 129, 0.1);
}

.advice-response h3 {
    color: #10b981;
    margin-bottom: 20px;
    font-weight: 700;
}

#advice-content {
    line-height: 1.8;
    color: #d1d5db;
}

#advice-content p {
    margin: 16px 0;
}

#advice-content ul, #advice-content ol {
    margin: 16px 0;
    padding-left: 28px;
}

#advice-content li {
    margin: 10px 0;
    color: #d1d5db;
}

/* Conversation History */
.conversation-history {
    display: grid;
    gap: 16px;
}

.conversation-item {
    background: rgba(0, 0, 0, 0.4);
    padding: 20px;
    border-radius: 12px;
    border-left: 3px solid #10b981;
    border: 1px solid rgba(16, 185, 129, 0.2);
    transition: all 0.3s ease;
}

.conversation-item:hover {
    border-color: rgba(16, 185, 129, 0.4);
    background: rgba(0, 0, 0, 0.6);
}

.conversation-item .question {
    font-weight: 600;
    color: #10b981;
    margin-bottom: 12px;
    font-size: 1rem;
}

.conversation-item .answer {
    color: #9ca3af;
    font-size: 0.95rem;
    line-height: 1.6;
}

.conversation-item .timestamp {
    font-size: 0.85rem;
    color: #6b7280;
    margin-top: 12px;
}

.empty-state {
    text-align: center;
    color: #6b7280;
    padding: 48px;
    font-style: italic;
}

/* Buttons */
.btn-primary, .btn-secondary {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-full {
    width: 100%;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    overflow-y: auto;
}

.modal-content {
    background-color: white;
    margin: 50px auto;
    padding: 30px;
    border-radius: 10px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.close {
    color: #adb5bd;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    color: #495057;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #495057;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e9ecef;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: #6c757d;
    font-size: 0.875rem;
}

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

.login-container {
    width: 100%;
    max-width: 450px;
}

.login-card {
    background: white;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.login-card h1 {
    color: #667eea;
    text-align: center;
    margin-bottom: 10px;
    font-size: 2rem;
}

.tagline {
    text-align: center;
    color: #6c757d;
    margin-bottom: 30px;
}

.auth-form h2 {
    color: #495057;
    margin-bottom: 25px;
    font-size: 1.5rem;
}

.form-switch {
    text-align: center;
    margin-top: 20px;
    color: #6c757d;
}

.form-switch a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.form-switch a:hover {
    text-decoration: underline;
}

.auth-message {
    margin-top: 20px;
    padding: 12px;
    border-radius: 6px;
    text-align: center;
    display: none;
}

.auth-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.auth-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.auth-message.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Loading State */
.loading {
    color: #667eea;
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-header h1 {
        font-size: 1.5rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
    
    section {
        padding: 20px;
    }
    
    .modal-content {
        margin: 20px auto;
        padding: 20px;
    }
}