/* ============ CSS Variables ============ */
:root {
    --bg-gradient-light: radial-gradient(circle at 20% 20%, #f8fafc, #eef2f6);
    --card-bg-light: rgba(255, 255, 255, 0.8);
    --card-border-light: 1px solid rgba(255, 255, 255, 0.6);
    --card-shadow-light: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    --text-primary-light: #1e293b;
    --text-secondary-light: #475569;
    --text-muted-light: #64748b;
    --accent-light: #ff6b35;
    --accent-hover-light: #ff8b5c;
    --success-light: #10b981;
    --warning-light: #f59e0b;
    --error-light: #ef4444;
    --input-bg-light: #ffffff;
    --input-border-light: #cbd5e1;
    --btn-secondary-bg-light: #f1f5f9;
    --btn-secondary-hover-light: #e2e8f0;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-gradient-light: radial-gradient(circle at 20% 20%, #0f172a, #1e293b);
        --card-bg-light: rgba(30, 41, 59, 0.8);
        --card-border-light: 1px solid rgba(255, 255, 255, 0.1);
        --card-shadow-light: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
        --text-primary-light: #f1f5f9;
        --text-secondary-light: #cbd5e1;
        --text-muted-light: #94a3b8;
        --accent-light: #ff8b5c;
        --accent-hover-light: #ff9f7a;
        --success-light: #34d399;
        --warning-light: #fbbf24;
        --error-light: #f87171;
        --input-bg-light: #0f172a;
        --input-border-light: #334155;
        --btn-secondary-bg-light: #334155;
        --btn-secondary-hover-light: #475569;
    }
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-gradient-light);
    color: var(--text-primary-light);
    min-height: 100vh;
    transition: background 0.3s, color 0.3s;
    line-height: 1.5;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar – shared with chat */
.sidebar {
    width: 340px;
    background: var(--secondary);
    display: flex;
    flex-direction: column;
    color: white;
    overflow-y: auto;
    border-right: 1px solid rgba(255,255,255,0.1);
    height: 100vh;
    position: sticky;
    top: 0;
}

.logo {
    padding: 28px 24px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    background: var(--secondary);
}

.logo h1 {
    font-size: 22px;
    font-weight: 700;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 6px;
}

.tagline {
    font-size: 12px;
    opacity: 0.8;
    color: rgba(255,255,255,0.7);
}

.user-info {
    padding: 20px;
    background: rgba(255,255,255,0.08);
    margin: 16px;
    border-radius: 12px;
    text-align: center;
    display: none;
    flex-direction: column;
    gap: 12px;
}

.user-info.active {
    display: flex;
}

.user-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
}

.user-name {
    font-size: 16px;
    font-weight: 600;
    color: white;
}

/* Navigation Links */
.sidebar-nav {
    margin: 30px 16px 40px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 20px;
    background: var(--card-bg-light);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: var(--card-border-light);
    border-radius: 50px;
    color: var(--text-primary-light);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.sidebar-nav .nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,107,53,0.2), transparent);
    transition: left 0.5s;
}

.sidebar-nav .nav-link:hover::before {
    left: 100%;
}

.sidebar-nav .nav-link:hover {
    background: var(--accent-light);
    border-color: var(--accent-light);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 15px 25px -8px rgba(255,107,53,0.4);
}

.sidebar-nav .nav-link i {
    font-size: 1.3rem;
    transition: transform 0.3s;
}

.sidebar-nav .nav-link:hover i {
    transform: rotate(15deg) scale(1.1);
}

.sidebar-nav .nav-link.active {
    background: var(--accent-light);
    color: white;
    border-color: var(--accent-light);
    box-shadow: 0 15px 25px -8px rgba(255,107,53,0.4);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: transparent;
    overflow-y: auto; /* Ensure scrollability */
    height: 100vh;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-light) var(--bg-secondary);
}

.main-content::-webkit-scrollbar {
    width: 8px;
}

.main-content::-webkit-scrollbar-track {
    background: var(--bg-secondary, #F8FAFC);
    border-radius: 4px;
}

.main-content::-webkit-scrollbar-thumb {
    background: var(--accent-light, #FF6B35);
    border-radius: 4px;
}

.main-content::-webkit-scrollbar-thumb:hover {
    background: var(--accent-hover-light, #ff8b5c);
}

/* Header */
.chat-header {
    background: var(--card-bg-light);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: var(--card-border-light);
    padding: 1.5rem 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: var(--card-shadow-light);
}

.chat-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary-light);
}

.chat-header h2 i {
    color: var(--accent-light);
    font-size: 2rem;
}

/* Billing Container */
.billing-container {
    padding: 2.5rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Billing Cards */
.billing-card {
    background: var(--card-bg-light);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: var(--card-border-light);
    border-radius: 40px;
    box-shadow: var(--card-shadow-light);
    padding: 2rem 2.5rem;
    margin-bottom: 2rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.billing-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.2);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--text-muted-light);
    padding-bottom: 1rem;
}

.card-header i {
    font-size: 2.2rem;
    color: var(--accent-light);
    background: rgba(255,107,53,0.1);
    padding: 12px;
    border-radius: 20px;
}

.card-header h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary-light);
}

.card-content {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

/* Detail rows */
.detail-row {
    display: flex;
    align-items: baseline;
    padding: 1rem 0;
    border-bottom: 1px dashed var(--text-muted-light);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    width: 100px;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted-light);
}

.detail-value {
    flex: 1;
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-primary-light);
}

.name-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.edit-btn {
    background: var(--btn-secondary-bg-light);
    border: none;
    color: var(--text-primary-light);
    padding: 8px 20px;
    border-radius: 40px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
    border: 1px solid var(--input-border-light);
}

.edit-btn:hover {
    background: var(--btn-secondary-hover-light);
    color: var(--accent-light);
    border-color: var(--accent-light);
}

.edit-container {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    background: rgba(0,0,0,0.02);
    padding: 1.2rem;
    border-radius: 30px;
}

.edit-input {
    background: var(--input-bg-light);
    border: 2px solid var(--input-border-light);
    border-radius: 40px;
    padding: 12px 20px;
    font-size: 1rem;
    color: var(--text-primary-light);
    flex: 1;
    min-width: 250px;
    transition: border-color 0.2s;
}

.edit-input:focus {
    outline: none;
    border-color: var(--accent-light);
    box-shadow: 0 0 0 4px rgba(255,107,53,0.2);
}

.edit-actions {
    display: flex;
    gap: 0.8rem;
}

.save-btn {
    background: var(--accent-light);
    color: white;
    border: none;
    padding: 12px 28px;
    border-radius: 40px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    box-shadow: 0 8px 16px -4px rgba(255,107,53,0.3);
}

.save-btn:hover {
    background: var(--accent-hover-light);
    transform: scale(1.02);
}

.cancel-edit-btn {
    background: transparent;
    border: 2px solid var(--text-muted-light);
    color: var(--text-primary-light);
    padding: 10px 24px;
    border-radius: 40px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.cancel-edit-btn:hover {
    background: var(--text-muted-light);
    color: white;
}

/* Plan grid */
.plan-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.plan-item {
    background: rgba(0,0,0,0.02);
    padding: 1.2rem;
    border-radius: 24px;
    border: var(--card-border-light);
}

.plan-label {
    display: block;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted-light);
    margin-bottom: 6px;
}

.plan-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary-light);
}

.plan-value.highlight {
    color: var(--accent-light);
    background: rgba(255,107,53,0.1);
    padding: 4px 12px;
    border-radius: 30px;
    display: inline-block;
}

/* Cancel section */
.cancel-section {
    margin-top: 2rem;
    text-align: right;
}

.cancel-btn {
    background: rgba(239,68,68,0.1);
    color: var(--error-light);
    border: 2px solid var(--error-light);
    padding: 14px 32px;
    border-radius: 60px;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.cancel-btn:hover {
    background: var(--error-light);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(239,68,68,0.4);
}

/* Pricing Cards */
.pricing-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 1rem;
}

.price-card {
    background: var(--card-bg-light);
    backdrop-filter: blur(10px);
    border: var(--card-border-light);
    border-radius: 40px;
    padding: 2.5rem 2rem;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
    box-shadow: var(--card-shadow-light);
}

.price-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 30px 60px -10px rgba(0, 0, 0, 0.3);
}

.price-card.premium {
    background: linear-gradient(145deg, var(--card-bg-light), rgba(139,92,246,0.1));
    border-color: rgba(139,92,246,0.3);
}
.plan-card.price-card {
    position: relative;        /* needed for absolute positioning of badge */
    overflow: visible !important;  /* prevent clipping */
}
.card-badge {
    padding: 20px 22px;         /* increase vertical padding */
    line-height: 1.6;          /* more breathing room for text */
    font-size: 0.9rem;         /* slightly larger if needed */
    top: 40px;                 /* fine-tune position */
    right: 20px;
    white-space: nowrap;       /* keep text on one line */
    height: auto;              /* let height adjust to content */
    display: inline-block;
}

.card-badge.popular {
    background: linear-gradient(135deg, var(--accent-light), #ffb347);
    color: white;
    box-shadow: 0 4px 12px rgba(255,107,53,0.3);
}

.card-badge.best {
    background: linear-gradient(135deg, #8b5cf6, #c084fc);
    color: white;
    box-shadow: 0 4px 12px rgba(139,92,246,0.3);
}

.price-card h4 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary-light);
}

.price {
    margin-bottom: 2rem;
}

.currency {
    font-size: 1.5rem;
    font-weight: 600;
    vertical-align: top;
    color: var(--text-muted-light);
}

.amount {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1;
    color: var(--text-primary-light);
}

.period {
    font-size: 1rem;
    color: var(--text-muted-light);
    margin-left: 4px;
}

.features {
    list-style: none;
    padding: 0;
    margin: 0 0 2.5rem 0;
    flex: 1;
}

.features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    color: var(--text-secondary-light);
    border-bottom: 1px dashed var(--border-color, rgba(255,255,255,0.1));
    font-size: 1rem;
}

.features li i {
    color: var(--success-light);
    font-size: 1.3rem;
}

.subscribe-btn {
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: 60px;
    font-weight: 700;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--btn-secondary-bg-light);
    color: var(--text-primary-light);
    border: 1px solid var(--input-border-light);
}

.subscribe-btn.basic {
    background: linear-gradient(135deg, var(--accent-light), #ffb347);
    color: white;
    box-shadow: 0 10px 20px -5px rgba(255,107,53,0.4);
}

.subscribe-btn.basic:hover {
    transform: scale(1.02);
    box-shadow: 0 15px 25px -5px rgba(255,107,53,0.5);
}

.subscribe-btn.premium {
    background: linear-gradient(135deg, #8b5cf6, #c084fc);
    color: white;
    box-shadow: 0 10px 20px -5px rgba(139,92,246,0.4);
}

.subscribe-btn.premium:hover {
    transform: scale(1.02);
    box-shadow: 0 15px 25px -5px rgba(139,92,246,0.5);
}

/* Current plan button state */
.subscribe-btn.current-plan {
    background: #94a3b8 !important;
    cursor: not-allowed !important;
    opacity: 0.7;
    box-shadow: none !important;
}
.subscribe-btn.current-plan:hover {
    transform: none;
    background: #94a3b8 !important;
}

/* Upgrade button optional styling (if you ever add upgrade class) */
.subscribe-btn.upgrade {
    background: linear-gradient(135deg, #ffb347, #ff8b5c);
    box-shadow: 0 10px 20px -5px rgba(255,180,70,0.4);
}
.subscribe-btn.upgrade:hover {
    transform: scale(1.02);
    box-shadow: 0 15px 25px -5px rgba(255,180,70,0.5);
}

/* Notification */
.notification {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: white;
    padding: 16px 24px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    border-left: 4px solid var(--accent-light);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
    max-width: 400px;
}

.notification.show {
    transform: translateY(0);
    opacity: 1;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        position: fixed;
        left: -100%;
        transition: left 0.3s;
        z-index: 2000;
    }
    .sidebar.mobile-visible {
        left: 0;
    }
    .main-content {
        width: 100%;
    }
    .chat-header {
        padding: 1rem 1.5rem;
    }
    .billing-container {
        padding: 1.5rem;
    }
    .billing-card {
        padding: 1.5rem;
    }
    .card-header h3 {
        font-size: 1.5rem;
    }
    .plan-grid {
        grid-template-columns: 1fr;
    }
    .edit-container {
        flex-direction: column;
        align-items: stretch;
    }
    .edit-actions {
        justify-content: center;
    }
}