/* Public site - Vazirmatn + Bootstrap RTL */
:root {
    --primary: #38ceff;
    --primary-dark: #1aa8d6;
    --primary-soft: #74ddff;
    --bg: #F5F5F5;
    --card-bg: #fff;
    --gray-border: #e5e7eb;
    --gray-muted: #6b7280;
    --cta: #38ceff;
    --cta-hover: #1dbbe8;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 24px rgba(0,0,0,0.1);
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
}

body {
    font-family: 'Vazirmatn', sans-serif;
    background: var(--bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
}
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../gradient-brain-background-Top.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.16;
    z-index: -1;
    pointer-events: none;
}
body::after {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(circle at 15% 20%, rgba(30, 58, 95, 0.08), transparent 35%),
        radial-gradient(circle at 85% 80%, rgba(5, 150, 105, 0.07), transparent 32%);
    pointer-events: none;
    z-index: -1;
}

main {
    flex: 1;
    opacity: 0;
    transition: opacity 0.25s ease;
}
body.page-loaded main {
    opacity: 1;
}

/* Top bar (minimal header) - تیره‌تر */
.top-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: linear-gradient(120deg, #067ea5, #10b7e5);
    box-shadow: var(--shadow-md);
    transition: box-shadow var(--transition-normal);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.top-bar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    max-width: 1400px;
    margin: 0 auto;
}
.top-bar-brand {
    color: #fff;
    font-weight: 600;
    text-decoration: none;
    font-size: 1rem;
    transition: opacity var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
}
.top-bar-logo {
    width: 34px;
    height: 34px;
    border-radius: 0.55rem;
    object-fit: cover;
    background: #000;
    border: 1px solid rgba(255, 255, 255, 0.35);
}
.top-bar-brand:hover {
    color: #fff;
    opacity: 0.9;
}
.top-bar-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.top-bar-user {
    color: rgba(255,255,255,0.95);
    font-size: 0.875rem;
    margin-left: 0.5rem;
}
.top-bar-link {
    color: #fff;
    text-decoration: none;
    padding: 0.35rem 0.6rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    transition: opacity var(--transition-fast), background-color var(--transition-fast);
}
.top-bar-link:hover {
    color: #fff;
    opacity: 0.95;
    background: rgba(255,255,255,0.15);
}
.top-bar-btn {
    background: rgba(255,255,255,0.95);
    color: var(--primary) !important;
}
.top-bar-btn:hover {
    background: #fff !important;
    color: var(--primary) !important;
    opacity: 1;
}

/* Vertical nav - الگو از one-page icon menu */
.vertical-nav {
    position: fixed;
    top: 0;
    bottom: 0;
    right: 0;
    width: 72px;
    z-index: 99;
    display: flex;
    align-items: center;
    padding: 0;
    background: var(--primary);
    box-shadow: -4px 0 20px rgba(0,0,0,0.08);
    transition: transform 0.5s cubic-bezier(0.54, 0.35, 0.29, 0.99), width var(--transition-normal);
}
.vertical-nav-menu {
    list-style: none;
    margin: 0;
    padding: 3.5rem 0 1rem;
    width: 100%;
    height: auto;
    max-height: 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
}
.vertical-nav-menu li {
    margin: 0;
}
.vertical-nav-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    margin: 0 auto;
    color: #fff;
    font-size: 1.5rem;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: transform 0.5s cubic-bezier(0.54, 0.35, 0.29, 0.99), opacity 0.25s ease, background-color var(--transition-fast);
}
.vertical-nav-icon:hover {
    opacity: 0.85;
    background: rgba(255,255,255,0.1);
}
.vertical-nav-icon:focus-visible,
.vertical-nav-toggle:focus-visible,
.ai-chat-toggle:focus-visible,
.ai-chat-close:focus-visible,
.ai-chat-send:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 2px;
}
.vertical-nav-icon.active {
    transform: scale(1.2);
    background: rgba(255,255,255,0.2);
}
.vertical-nav-icon:not(.active) {
    transform: scale(0.9);
}
.vertical-nav-icon:hover:not(.active) {
    transform: scale(1.05);
}
.vertical-nav-icon .bi {
    display: block;
}

/* Main content offset for vertical nav و بالانس */
.main-with-nav {
    margin-right: 84px;
    margin-left: 0;
    transition: margin-right var(--transition-normal), margin-left var(--transition-normal), opacity 0.25s ease;
}

/* Toggle for mobile: show/hide vertical nav */
.vertical-nav-toggle {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 1060;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: none;
    background: var(--primary);
    color: #fff;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.vertical-nav-toggle:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 24px rgba(30, 58, 95, 0.4);
}

/* Backdrop for mobile nav - only visible when nav is open */
.vertical-nav-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1055;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}
@media (max-width: 991px) {
    .vertical-nav {
        transform: translateX(100%);
        width: 72px;
    }
    .vertical-nav.open {
        transform: translateX(0);
        z-index: 1060;
    }
    .vertical-nav.open ~ .vertical-nav-backdrop {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }
    .main-with-nav {
        margin-right: 0;
        margin-left: 0;
    }
    .vertical-nav-toggle {
        display: flex !important;
    }
}

@media (min-width: 992px) {
    .vertical-nav-toggle {
        display: none;
    }
    .main-with-nav {
        margin-left: auto;
        margin-right: 84px;
    }
}

/* انیمیشن ورود صفحه (fade-in) */
.main-with-nav {
    opacity: 0;
}
body.page-loaded .main-with-nav {
    opacity: 1;
}

/* Auth pages */
.auth-page {
    max-width: 420px;
    margin: 2rem auto;
}

.auth-card {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}
.auth-card .card-body {
    border-radius: var(--radius-md);
}

/* Dashboard layout */
.dashboard-layout {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
}

.dashboard-sidebar {
    width: 240px;
    flex-shrink: 0;
}

.dashboard-sidebar .list-group-item {
    border-radius: var(--radius-sm);
    margin-bottom: 0.25rem;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.dashboard-sidebar .list-group-item:hover {
    background: #f1f5f9;
    transform: translateX(-2px);
}
.dashboard-sidebar .list-group-item.active {
    background: var(--primary);
    border-color: var(--primary);
}
.dashboard-sidebar .list-group-item .bi {
    font-size: 1.1rem;
    opacity: 0.9;
}

.dashboard-content {
    flex: 1;
    min-width: 0;
}

@media (max-width: 991px) {
    .dashboard-layout { flex-direction: column; }
    .dashboard-sidebar { width: 100%; }
}

/* Stats cards */
.stat-card {
    border-radius: var(--radius-md);
    border: none;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.stat-card .card-body h3 {
    font-weight: 700;
}

/* Upload zone */
.upload-zone {
    border: 2px dashed #cbd5e1;
    border-radius: 1rem;
    padding: 3rem 2rem;
    text-align: center;
    background: #f8fafc;
    transition: border-color 0.2s, background 0.2s;
}

.upload-zone.dragover {
    border-color: var(--cta);
    background: #d1fae5;
}

.upload-zone input[type="file"] {
    display: none;
}
.upload-zone .upload-zone-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 0.75rem;
    opacity: 0.85;
}

.file-preview {
    font-size: 0.9rem;
}

#upload-progress-wrap .progress {
    height: 0.5rem;
}
#upload-progress-bar {
    width: 0%;
}
#upload-progress-wrap.upload-state-error #upload-status {
    color: #b91c1c !important;
}
#upload-progress-wrap.upload-state-error .progress-bar {
    background-color: #dc2626;
}

/* Processing options - prominent card */
.processing-options-card {
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    border-width: 2px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.processing-options-title {
    font-weight: 700;
    color: var(--primary);
}

.custom-prompt-label {
    font-weight: 600;
    color: #374151;
}

.custom-prompt-textarea {
    font-size: 1rem;
    border-color: var(--gray-border);
}

.custom-prompt-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(30, 58, 95, 0.15);
}

/* Plans grid */
.plan-card {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.plan-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.plan-card .card-body {
    padding: 1.5rem;
}

.plan-card .display-6 {
    color: var(--primary);
}

.plan-card .btn-primary {
    background: var(--cta);
    border-color: var(--cta);
}

.plan-card .btn-primary:hover {
    background: var(--cta-hover);
    border-color: var(--cta-hover);
}

/* Pricing section - pattern from shadcn Pricing component */
.pricing-section {
    max-width: 960px;
    margin: 0 auto;
}
.pricing-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: #1e293b;
}
@media (min-width: 576px) {
    .pricing-title { font-size: 2.25rem; }
}
.pricing-desc {
    font-size: 1rem;
    color: var(--gray-muted);
    white-space: pre-line;
    margin: 0;
}
.pricing-toggle-wrap {
    gap: 0.5rem;
}
@media (max-width: 575px) {
    .pricing-section .pricing-toggle-wrap {
        flex-direction: row;
        gap: 0.35rem;
    }
    .pricing-card {
        padding: 1.25rem;
    }
}
.pricing-toggle-label {
    font-weight: 600;
    color: var(--gray-muted);
    transition: color var(--transition-fast);
}
/* Active state by container so RTL/LTR behave the same */
.pricing-toggle-wrap:not(.is-yearly) .pricing-toggle-label[data-active="monthly"] {
    color: #1e293b;
}
.pricing-toggle-wrap.is-yearly .pricing-toggle-label[data-active="yearly"] {
    color: var(--primary);
}

/* Toggle switch (like shadcn Switch) - LTR */
.pricing-switch {
    position: relative;
    display: inline-block;
    width: 2.75rem;
    height: 1.5rem;
    flex-shrink: 0;
}
.pricing-switch-input {
    opacity: 0;
    width: 0;
    height: 0;
}
.pricing-switch-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gray-border);
    border-radius: 9999px;
    transition: background var(--transition-normal);
    border: 2px solid transparent;
}
.pricing-switch-slider::before {
    content: '';
    position: absolute;
    height: 1.1rem;
    width: 1.1rem;
    left: 0.15rem;
    bottom: 0.1rem;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
    transition: transform var(--transition-normal);
}
/* LTR: unchecked = left, checked = move right */
.pricing-switch-input:checked + .pricing-switch-slider::before {
    transform: translateX(1.1rem);
}
/* RTL: unchecked = right (logical start), checked = move left */
[dir="rtl"] .pricing-switch-slider::before {
    left: auto;
    right: 0.15rem;
}
[dir="rtl"] .pricing-switch-input:checked + .pricing-switch-slider::before {
    transform: translateX(-1.1rem);
}
.pricing-switch-input:checked + .pricing-switch-slider {
    background: var(--primary);
}
.pricing-switch-input:focus-visible + .pricing-switch-slider {
    box-shadow: 0 0 0 2px var(--card-bg), 0 0 0 4px var(--primary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}
@media (min-width: 768px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
    }
}
@media (min-width: 992px) {
    .pricing-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 1rem;
    }
}

.pricing-card {
    position: relative;
    border-radius: 1rem;
    border: 1px solid var(--gray-border);
    background: var(--card-bg);
    padding: 1.5rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-fast);
    box-shadow: var(--shadow-sm);
}
.pricing-card:hover {
    box-shadow: var(--shadow-md);
}
.pricing-card--popular {
    border-width: 2px;
    border-color: var(--primary);
    z-index: 2;
}
@media (min-width: 992px) {
    .pricing-card--popular {
        transform: translateY(-0.5rem);
    }
    .pricing-card--side {
        z-index: 1;
        transform: scale(0.97);
    }
    .pricing-card--side:hover {
        transform: scale(0.98) translateY(-2px);
    }
}
.pricing-card__badge {
    position: absolute;
    top: 0;
    left: 0;
    background: var(--primary);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 0 0 0.75rem 0;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}
[dir="rtl"] .pricing-card__badge {
    left: auto;
    right: 0;
    border-radius: 0 0 0 0.75rem;
}
.pricing-card__body {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding-top: 0.5rem;
}
.pricing-card__name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-muted);
    margin: 0 0 1rem;
}
.pricing-card__price-wrap {
    margin-bottom: 0.25rem;
}
.pricing-price {
    font-size: 2rem;
    font-weight: 700;
    color: #1e293b;
}
@media (min-width: 576px) {
    .pricing-price { font-size: 2.5rem; }
}
.pricing-period {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-muted);
}
.pricing-billing {
    font-size: 0.75rem;
    margin: 0 0 1rem;
}
.pricing-features {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem;
    text-align: right;
}
[dir="rtl"] .pricing-features { text-align: right; }
.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}
.pricing-features li i {
    flex-shrink: 0;
    margin-top: 0.2rem;
}
.pricing-card__hr {
    border: none;
    border-top: 1px solid var(--gray-border);
    margin: 0 0 1rem;
}
.pricing-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 0.6rem 1.25rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
    border: 2px solid transparent;
}
.pricing-btn--outline {
    background: var(--card-bg);
    color: #1e293b;
    border-color: var(--gray-border);
}
.pricing-btn--outline:hover {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
}
.pricing-btn--primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.pricing-btn--primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #fff;
}
.pricing-card__note {
    font-size: 0.75rem;
    line-height: 1.4;
}

/* Hero */
.hero-section {
    padding: 3.25rem 0 2.5rem;
    text-align: center;
}

.hero-section h1 {
    font-weight: 700;
    color: #1f2937;
    letter-spacing: -0.02em;
}

.hero-section .lead {
    color: var(--gray-muted);
}

.hero-section .btn-primary:first-of-type,
.hero-section a.btn-primary:first-of-type {
    background: var(--cta);
    border-color: var(--cta);
}

.hero-section .btn-primary:first-of-type:hover,
.hero-section a.btn-primary:first-of-type:hover {
    background: var(--cta-hover);
    border-color: var(--cta-hover);
}

/* Tables */
.table th {
    font-weight: 600;
}
.table-hover tbody tr {
    transition: background-color var(--transition-fast);
}
.table-hover tbody tr:hover {
    background: #f8fafc;
}

/* Alerts */
.alert {
    border-radius: var(--radius-sm);
}

/* Buttons */
.btn, .btn-primary, .btn-cta, .btn-outline-primary, .btn-secondary {
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}
.btn:hover, .btn-primary:hover, .btn-cta:hover, .btn-outline-primary:hover, .btn-secondary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}
.btn:focus-visible, .btn-primary:focus-visible, .btn-cta:focus-visible {
    box-shadow: 0 0 0 0.2rem rgba(30, 58, 95, 0.35);
}
.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #063549;
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #fff;
}

.btn-cta {
    background: var(--cta);
    border-color: var(--cta);
    color: #063549;
}

.btn-cta:hover {
    background: var(--cta-hover);
    border-color: var(--cta-hover);
    color: #fff;
    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.25);
}

/* AI Chat Widget - RTL */
.ai-chat-widget {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 1050;
    font-family: 'Vazirmatn', sans-serif;
}

.ai-chat-panel {
    position: absolute;
    bottom: 4rem;
    right: 0;
    width: 380px;
    max-width: calc(100vw - 3rem);
    height: 480px;
    max-height: calc(100vh - 8rem);
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px) scale(0.95);
    transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
}

.ai-chat-widget.open .ai-chat-panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.ai-chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    background: var(--primary);
    color: #fff;
}

.ai-chat-title {
    font-weight: 600;
    font-size: 1rem;
}

.ai-chat-close {
    background: none;
    border: none;
    color: inherit;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0 0.25rem;
    line-height: 1;
    opacity: 0.9;
}

.ai-chat-close:hover {
    opacity: 1;
}

.ai-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.ai-chat-welcome {
    padding: 0.75rem 1rem;
    background: #f1f5f9;
    border-radius: 0.75rem;
    font-size: 0.9rem;
    color: #64748b;
}

.ai-chat-msg {
    max-width: 85%;
    padding: 0.75rem 1rem;
    border-radius: 1rem;
    font-size: 0.9rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.ai-chat-msg.user {
    align-self: flex-end;
    background: var(--primary);
    color: #fff;
}

.ai-chat-msg.assistant {
    align-self: flex-start;
    background: #f1f5f9;
    color: #1e293b;
}

.ai-chat-msg.loading {
    align-self: flex-start;
    background: #f1f5f9;
}

.ai-chat-input-wrap {
    padding: 1rem;
    border-top: 1px solid #e2e8f0;
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
}

.ai-chat-input {
    flex: 1;
    border: 1px solid #e2e8f0;
    border-radius: 0.75rem;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    font-family: inherit;
    resize: none;
    min-height: 2.5rem;
    max-height: 8rem;
    direction: rtl;
}

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

.ai-chat-send {
    padding: 0.75rem 1.25rem;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 0.75rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
}

.ai-chat-send:hover {
    background: var(--primary-dark);
}

.ai-chat-send:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.ai-chat-toggle {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(30,58,95,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-chat-toggle {
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}
.ai-chat-toggle:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(30,58,95,0.45);
}

.ai-chat-toggle-icon {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}
.ai-chat-close {
    transition: opacity var(--transition-fast), background var(--transition-fast);
    border-radius: var(--radius-sm);
}
.ai-chat-close:hover {
    opacity: 1;
    background: rgba(255,255,255,0.15);
}
.ai-chat-send {
    transition: background var(--transition-fast), transform var(--transition-fast);
}
.ai-chat-send:hover:not(:disabled) {
    transform: translateY(-1px);
}
.ai-chat-msg {
    transition: opacity var(--transition-fast);
}

/* Feature cards - LED-style border + spotlight (home page) */
.feature-card {
    position: relative;
    border-radius: var(--radius-lg);
    border: 2px solid rgba(56, 189, 248, 0.9);
    box-shadow:
        0 0 8px rgba(56, 189, 248, 0.6),
        0 0 16px rgba(14, 165, 233, 0.35),
        inset 0 0 12px rgba(56, 189, 248, 0.06);
    background: var(--card-bg);
    overflow: hidden;
}
.feature-card .card-body {
    position: relative;
    z-index: 1;
    border-radius: calc(var(--radius-lg) - 2px);
    background: var(--card-bg);
}

/* Spotlight card - mouse-follow effect (pattern from React SpotlightCard) */
.feature-card.card-spotlight {
    --mouse-x: 50%;
    --mouse-y: 50%;
    --spotlight-color: rgba(56, 189, 248, 0.15);
}
.feature-card.card-spotlight .card-body {
    background: transparent !important;
}
.card-spotlight::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(
        circle at var(--mouse-x) var(--mouse-y),
        var(--spotlight-color),
        transparent 75%
    );
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
    z-index: 0;
}
.card-spotlight:hover::before,
.card-spotlight:focus-within::before {
    opacity: 0.85;
}

/* Feature cards - icon contrast */
.feature-icon-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: var(--radius-md);
    background: rgba(30, 58, 95, 0.08);
    color: var(--primary);
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}
.feature-icon-wrap .bi {
    font-size: 1.75rem;
}

@media (max-width: 480px) {
    .vertical-nav-toggle {
        bottom: 5.75rem;
    }
    .ai-chat-panel {
        width: calc(100vw - 2rem);
        right: -0.5rem;
    }
}

/* Responsive - upload and result */
@media (max-width: 768px) {
    .dashboard-content .card .card-body {
        padding: 1rem;
    }
    .processing-options-card .card-body {
        padding: 1.25rem;
    }
    .upload-zone {
        padding: 2rem 1rem;
    }
    #upload-submit-btn.btn-cta {
        width: 100%;
    }
    .result-pre {
        max-height: 60vh;
    }
}

@media (max-width: 768px) {
    .site-footer .row {
        gap: 1.5rem;
    }
    .site-footer .footer-heading {
        margin-top: 0.5rem;
    }
    .site-footer .footer-heading:first-child {
        margin-top: 0;
    }
}
@media (max-width: 480px) {
    .upload-zone {
        padding: 1.5rem 0.75rem;
    }
    .dashboard-content .card .card-body {
        padding: 0.75rem;
    }
    .processing-options-card .card-body {
        padding: 1rem;
    }
    .custom-prompt-textarea {
        min-height: 5rem;
    }
    .dashboard-content .btn-cta,
    .dashboard-content .btn-secondary {
        width: 100%;
    }
    .feature-icon-wrap {
        width: 3rem;
        height: 3rem;
        font-size: 1.5rem;
    }
}

/* Cards and upload zone - design polish */
.card {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid rgba(148, 163, 184, 0.18);
    backdrop-filter: blur(2px);
}
.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.upload-zone {
    box-shadow: var(--shadow-sm);
    transition: border-color var(--transition-normal), background var(--transition-normal), box-shadow var(--transition-normal);
}
.upload-zone:hover {
    border-color: #94a3b8;
    background: #eef4fb;
}
.upload-zone.dragover {
    box-shadow: 0 4px 16px rgba(5,150,105,0.2);
}

.btn-primary, .btn-cta, .btn-secondary {
    border-radius: var(--radius-sm);
    padding: 0.58rem 1.35rem;
    min-height: 2.75rem;
    font-weight: 600;
}
.btn-outline-primary {
    border-width: 1.5px;
}
/* Result area */
.result-pre {
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-border);
    background: #fafafa;
}
/* Form inputs focus */
.form-control, .form-select, .custom-prompt-textarea {
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-control:focus, .form-select:focus, .custom-prompt-textarea:focus {
    box-shadow: 0 0 0 0.2rem rgba(30, 58, 95, 0.15);
}
/* Footer */
.site-footer {
    position: relative;
    margin-top: auto;
    padding-top: 0;
    background: linear-gradient(180deg, rgba(248, 250, 252, 0.98) 0%, rgba(226, 232, 240, 0.95) 100%);
    border-top: 1px solid var(--gray-border);
    color: var(--gray-muted);
    overflow: hidden;
}
.footer-wave {
    height: 4px;
    background: linear-gradient(90deg, transparent, rgba(14, 165, 233, 0.3), rgba(56, 189, 248, 0.5), rgba(14, 165, 233, 0.3), transparent);
    background-size: 200% 100%;
    animation: footer-wave-shine 6s ease-in-out infinite;
}
@keyframes footer-wave-shine {
    0%, 100% { background-position: 100% 0; }
    50% { background-position: 0 0; }
}
.site-footer .footer-heading {
    font-weight: 700;
    color: var(--primary);
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}
.site-footer .footer-about,
.site-footer .footer-contact {
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--gray-muted);
}
.site-footer .footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}
.site-footer .footer-links li {
    margin-bottom: 0.4rem;
}
.site-footer .footer-links a {
    color: var(--gray-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-fast), padding-right var(--transition-fast);
}
.site-footer .footer-links a:hover {
    color: var(--primary);
    padding-right: 4px;
}
.site-footer .footer-bottom {
    border-top: 1px solid var(--gray-border);
    color: var(--gray-muted);
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

@media (max-width: 768px) {
    .hero-section {
        padding-top: 2.5rem;
    }
    .hero-section .display-5 {
        font-size: 1.9rem;
    }
}

/* -----------------------------------------------------------------
   Modern UI System Layer (2024-2025)
   Keeps existing class names, improves consistency and hierarchy.
------------------------------------------------------------------ */
:root {
    --surface-0: #f8fafc;
    --surface-1: #ffffff;
    --surface-2: #f1f5f9;
    --text-strong: #0f2740;
    --text-soft: #355268;
    --border-soft: #dbe3ee;
    --ring: rgba(56, 206, 255, 0.26);
    --radius-xs: 0.4rem;
    --radius-sm: 0.55rem;
    --radius-md: 0.8rem;
    --radius-lg: 1rem;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
}

html {
    font-size: 16px;
}

body {
    color: var(--text-strong);
    line-height: 1.7;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-strong);
    letter-spacing: -0.01em;
}

p, .text-muted, .form-text {
    color: var(--text-soft) !important;
}

.container {
    max-width: 1160px;
}

.card,
.plan-card,
.pricing-card,
.processing-options-card,
.auth-card,
.stat-card {
    background: color-mix(in srgb, var(--surface-1) 94%, #f8fafc 6%);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 30px rgba(15, 23, 42, 0.06);
}

.card:hover,
.plan-card:hover,
.pricing-card:hover,
.stat-card:hover {
    box-shadow: 0 14px 34px rgba(15, 23, 42, 0.09);
}

.btn {
    border-radius: var(--radius-sm);
    font-weight: 600;
    letter-spacing: 0;
}

.btn-primary,
.btn-cta {
    box-shadow: 0 6px 14px rgba(30, 58, 95, 0.18);
}

.btn-outline-primary {
    background: #fff;
    color: var(--primary);
}

.btn-outline-primary:hover {
    background: color-mix(in srgb, var(--primary) 8%, #fff 92%);
    color: var(--primary);
}

.form-control,
.form-select,
.ai-chat-input {
    border-color: var(--border-soft);
    border-radius: var(--radius-sm);
    background: #fff;
    min-height: 2.7rem;
}

.form-control::placeholder,
.custom-prompt-textarea::placeholder,
.ai-chat-input::placeholder {
    color: #94a3b8;
}

.form-control:focus,
.form-select:focus,
.ai-chat-input:focus,
.custom-prompt-textarea:focus {
    border-color: var(--primary-soft);
    box-shadow: 0 0 0 0.24rem var(--ring) !important;
}

.hero-section {
    max-width: 820px;
    margin: 0 auto;
}

.hero-section .lead {
    font-size: 1.08rem;
}

.feature-card {
    border-color: color-mix(in srgb, #38bdf8 55%, #cbd5e1 45%);
}

.upload-zone {
    border-color: #c9d5e3;
    background: linear-gradient(180deg, #f8fbff 0%, #f3f7fc 100%);
}

.upload-zone p {
    font-weight: 500;
}

.file-preview {
    background: #eef6ff;
    border: 1px solid #d5e6fb;
    border-radius: var(--radius-sm);
    padding: 0.35rem 0.65rem;
    display: inline-block;
}

.result-pre {
    white-space: pre-wrap;
    max-height: 70vh;
    overflow: auto;
    line-height: 1.85;
}

.vertical-nav {
    background: linear-gradient(180deg, #0f95bf 0%, #067ea5 100%);
}

.vertical-nav-icon {
    border: 1px solid transparent;
}

.vertical-nav-icon:hover,
.vertical-nav-icon.active {
    border-color: rgba(255, 255, 255, 0.18);
}

.ai-chat-panel {
    border: 1px solid var(--border-soft);
}

.ai-chat-msg.assistant {
    border: 1px solid #e2e8f0;
}

.site-footer .footer-about,
.site-footer .footer-contact,
.site-footer .footer-links a {
    color: #526276;
}

.support-highlight {
    background: linear-gradient(145deg, rgba(56, 206, 255, 0.22), rgba(56, 206, 255, 0.1));
    border: 1px solid rgba(56, 206, 255, 0.42);
    border-radius: var(--radius-md);
    padding: 0.9rem 1rem;
}
.support-highlight .footer-contact {
    color: #0a4f61 !important;
    font-weight: 500;
}

/* Reusable utility patterns */
.ui-hidden {
    display: none !important;
}

.ui-pre-scroll {
    white-space: pre-wrap;
    overflow: auto;
}

.ui-select-auto {
    width: auto;
}

@media (max-width: 991px) {
    .dashboard-layout {
        gap: 1rem;
    }
    .card,
    .plan-card,
    .pricing-card {
        border-radius: var(--radius-sm);
    }
}

/* ---- Yousa branding polish + desktop alignment fixes ---- */
.top-bar-brand {
    align-items: center;
    gap: 0.7rem;
}
.top-bar-logo-wrap {
    width: 56px;
    height: 56px;
    border-radius: 0.9rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(circle at 30% 25%, rgba(56, 206, 255, 0.65), rgba(56, 206, 255, 0.2) 45%, transparent 70%),
        linear-gradient(145deg, #062b39, #0f4558);
    border: 1px solid rgba(255, 255, 255, 0.28);
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.22);
}
.top-bar-logo {
    width: 44px;
    height: 44px;
    object-fit: contain;
    background: transparent;
    border: none;
}
.top-bar-brand-text {
    display: inline-flex;
    flex-direction: column;
    line-height: 1.2;
}
.top-bar-brand-title {
    font-size: 1rem;
    color: #ffffff;
    font-weight: 700;
}
.top-bar-brand-subtitle {
    font-size: 0.74rem;
    color: rgba(255, 255, 255, 0.88);
    margin-top: 0.2rem;
}

/* Better icon tile variety */
.feature-icon-wrap {
    background:
        linear-gradient(145deg, rgba(56, 206, 255, 0.2), rgba(56, 206, 255, 0.05)),
        radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.9), transparent 55%);
    border: 1px solid rgba(56, 206, 255, 0.32);
}

/* Fix desktop imbalance caused by right fixed nav */
@media (min-width: 992px) {
    .main-with-nav {
        max-width: 1160px;
        margin-right: auto;
        margin-left: auto;
        padding-right: 1.25rem;
        padding-left: 1.25rem;
    }
    .vertical-nav {
        width: 68px;
    }
}

@media (max-width: 575px) {
    .top-bar-logo-wrap {
        width: 48px;
        height: 48px;
        border-radius: 0.8rem;
    }
    .top-bar-logo {
        width: 38px;
        height: 38px;
    }
    .top-bar-brand-title {
        font-size: 0.88rem;
    }
    .top-bar-brand-subtitle {
        display: none;
    }
}