/**
 * Julinai Enterprise - Main Styles
 *
 * CSS Variables based design system
 * Supports both light and dark modes
 */

:root {
    /* Colors */
    --julinai-primary: #2563eb;
    --julinai-primary-dark: #1d4ed8;
    --julinai-primary-light: #3b82f6;
    --julinai-accent: #f59e0b;
    --julinai-accent-light: #fbbf24;
    --julinai-success: #10b981;
    --julinai-danger: #ef4444;
    --julinai-warning: #f59e0b;

    /* Text */
    --julinai-text: #0f172a;
    --julinai-text-secondary: #475569;
    --julinai-text-muted: #94a3b8;

    /* Background */
    --julinai-bg: #ffffff;
    --julinai-bg-alt: #f8fafc;
    --julinai-bg-elevated: #ffffff;
    --julinai-border: #e2e8f0;

    /* Shadows */
    --julinai-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --julinai-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --julinai-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --julinai-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

    /* Typography */
    --julinai-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    --julinai-font-mono: "SF Mono", "Fira Code", "Cascadia Code", monospace;

    /* Spacing */
    --julinai-container-max: 1200px;
    --julinai-container-padding: 24px;
    --julinai-section-padding: 80px 0;
    --julinai-radius: 8px;
    --julinai-radius-lg: 12px;

    /* Transitions */
    --julinai-transition: all 0.2s ease;
}

/* Dark Mode */
[data-theme="dark"] {
    --julinai-text: #f1f5f9;
    --julinai-text-secondary: #cbd5e1;
    --julinai-text-muted: #64748b;
    --julinai-bg: #0f172a;
    --julinai-bg-alt: #1e293b;
    --julinai-bg-elevated: #1e293b;
    --julinai-border: #334155;
    --julinai-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --julinai-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px -1px rgba(0, 0, 0, 0.4);
    --julinai-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.4);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--julinai-font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--julinai-text);
    background-color: var(--julinai-bg);
    transition: background-color 0.3s ease, color 0.3s ease;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--julinai-primary);
    text-decoration: none;
    transition: var(--julinai-transition);
}

a:hover {
    color: var(--julinai-primary-dark);
}

/* Container */
.julinai-container {
    width: 100%;
    max-width: var(--julinai-container-max);
    margin: 0 auto;
    padding: 0 var(--julinai-container-padding);
}

/* Header */
.julinai-site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--julinai-bg-elevated);
    border-bottom: 1px solid var(--julinai-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.julinai-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.julinai-site-branding {
    flex-shrink: 0;
}

.julinai-site-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--julinai-text);
    text-decoration: none;
}

.julinai-site-title:hover {
    color: var(--julinai-primary);
}

/* Navigation */
.julinai-main-nav {
    display: none;
}

@media (min-width: 768px) {
    .julinai-main-nav {
        display: block;
    }
}

.julinai-nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.julinai-nav-menu a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--julinai-text-secondary);
    padding: 8px 0;
    position: relative;
}

.julinai-nav-menu a:hover {
    color: var(--julinai-primary);
}

.julinai-nav-menu .current-menu-item a {
    color: var(--julinai-primary);
}

/* Header Actions */
.julinai-header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.julinai-dark-mode-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    padding: 8px;
    border-radius: var(--julinai-radius);
    transition: var(--julinai-transition);
}

.julinai-dark-mode-toggle:hover {
    background-color: var(--julinai-bg-alt);
}

[data-theme="dark"] .julinai-icon-light,
.julinai-icon-dark {
    display: none;
}

[data-theme="dark"] .julinai-icon-dark {
    display: inline;
}

.julinai-mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    gap: 5px;
}

.julinai-hamburger,
.julinai-hamburger::before,
.julinai-hamburger::after {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--julinai-text);
    border-radius: 2px;
    transition: var(--julinai-transition);
}

.julinai-hamburger {
    position: relative;
}

.julinai-hamburger::before,
.julinai-hamburger::after {
    content: '';
    position: absolute;
}

.julinai-hamburger::before {
    top: -7px;
}

.julinai-hamburger::after {
    bottom: -7px;
}

@media (min-width: 768px) {
    .julinai-mobile-menu-toggle {
        display: none;
    }
}

/* Content */
.julinai-site-content {
    min-height: 60vh;
}

.julinai-article {
    padding: var(--julinai-section-padding);
}

.julinai-entry-header {
    margin-bottom: 40px;
    text-align: center;
}

.julinai-entry-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--julinai-text);
}

.julinai-featured-image {
    margin: 24px 0;
    border-radius: var(--julinai-radius-lg);
    overflow: hidden;
}

.julinai-featured-image img {
    width: 100%;
    height: auto;
}

.julinai-entry-content {
    max-width: 720px;
    margin: 0 auto;
}

.julinai-entry-content h2,
.julinai-entry-content h3,
.julinai-entry-content h4 {
    margin-top: 2em;
    margin-bottom: 0.75em;
    font-weight: 700;
    color: var(--julinai-text);
}

.julinai-entry-content h2 {
    font-size: 1.75rem;
}

.julinai-entry-content h3 {
    font-size: 1.375rem;
}

.julinai-entry-content p {
    margin-bottom: 1.5em;
    color: var(--julinai-text-secondary);
}

.julinai-entry-content ul,
.julinai-entry-content ol {
    margin-bottom: 1.5em;
    padding-left: 1.5em;
}

.julinai-entry-content li {
    margin-bottom: 0.5em;
}

.julinai-entry-content blockquote {
    margin: 2em 0;
    padding: 1em 1.5em;
    border-left: 4px solid var(--julinai-primary);
    background-color: var(--julinai-bg-alt);
    border-radius: 0 var(--julinai-radius) var(--julinai-radius) 0;
    font-style: italic;
}

.julinai-entry-content code {
    font-family: var(--julinai-font-mono);
    font-size: 0.875em;
    background-color: var(--julinai-bg-alt);
    padding: 2px 6px;
    border-radius: 4px;
}

.julinai-entry-content pre {
    background-color: var(--julinai-bg-alt);
    padding: 1.5em;
    border-radius: var(--julinai-radius);
    overflow-x: auto;
    margin-bottom: 1.5em;
}

.julinai-entry-content pre code {
    background: none;
    padding: 0;
}

/* Footer */
.julinai-site-footer {
    background-color: var(--julinai-bg-alt);
    border-top: 1px solid var(--julinai-border);
    padding: 60px 0 30px;
}

.julinai-footer-widgets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.julinai-footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid var(--julinai-border);
    flex-wrap: wrap;
    gap: 16px;
}

.julinai-footer-copyright {
    font-size: 0.875rem;
    color: var(--julinai-text-muted);
}

.julinai-footer-nav {
    display: flex;
    list-style: none;
    gap: 24px;
}

.julinai-footer-nav a {
    font-size: 0.875rem;
    color: var(--julinai-text-muted);
}

.julinai-footer-nav a:hover {
    color: var(--julinai-primary);
}

/* Back to top */
.julinai-back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background-color: var(--julinai-primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--julinai-shadow-md);
    transition: var(--julinai-transition);
    z-index: 999;
}

.julinai-back-to-top:hover {
    background-color: var(--julinai-primary-dark);
    transform: translateY(-2px);
}

.julinai-back-to-top[hidden] {
    display: none;
}

/* Screen reader */
.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    word-wrap: normal;
}

/* Page links */
.julinai-page-links {
    margin-top: 2em;
    padding-top: 2em;
    border-top: 1px solid var(--julinai-border);
    color: var(--julinai-text-secondary);
}

.julinai-page-links a {
    margin: 0 4px;
    padding: 4px 12px;
    border: 1px solid var(--julinai-border);
    border-radius: var(--julinai-radius);
}

.julinai-page-links a:hover {
    background-color: var(--julinai-primary);
    color: #fff;
    border-color: var(--julinai-primary);
}

/* ============================================
   AI Generated Page Sections
   ============================================ */

/* AI page overrides */
.julinai-page-main--ai {
    padding: 0;
}

.julinai-article--ai {
    padding: 0;
}

.julinai-entry-content--ai {
    max-width: none;
    margin: 0;
}

/* Section base */
.julinai-ai-page .julinai-section {
    width: 100%;
}

/* Hero */
.julinai-hero {
    text-align: center;
    padding: 100px 20px;
}

.julinai-hero__inner {
    max-width: 800px;
    margin: 0 auto;
}

.julinai-hero__badge {
    display: inline-block;
    padding: 4px 16px;
    background: rgba(255,255,255,0.2);
    border-radius: 20px;
    font-size: 0.875rem;
    margin-bottom: 20px;
}

.julinai-hero__title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
}

.julinai-hero__subtitle {
    font-size: clamp(1rem, 2vw, 1.375rem);
    opacity: 0.9;
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Section headings */
.julinai-section__heading {
    text-align: center;
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--julinai-text);
}

.julinai-section__subheading {
    text-align: center;
    color: var(--julinai-text-secondary);
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Grid systems */
.julinai-grid {
    display: grid;
    gap: 24px;
}

.julinai-grid--3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.julinai-grid--4 {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* Cards */
.julinai-card {
    background: var(--julinai-bg-elevated);
    padding: 32px;
    border-radius: var(--julinai-radius-lg);
    box-shadow: var(--julinai-shadow);
    transition: var(--julinai-transition);
}

.julinai-card:hover {
    box-shadow: var(--julinai-shadow-md);
    transform: translateY(-2px);
}

.julinai-card__icon {
    width: 48px;
    height: 48px;
    background: var(--julinai-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.25rem;
    margin-bottom: 16px;
}

.julinai-card__title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.julinai-card__desc {
    color: var(--julinai-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Advantages */
.julinai-advantage {
    text-align: center;
    padding: 24px 16px;
}

.julinai-advantage__icon {
    width: 56px;
    height: 56px;
    background: var(--julinai-primary);
    border-radius: 50%;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.5rem;
    font-weight: 700;
}

.julinai-advantage__title {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.julinai-advantage__desc {
    color: var(--julinai-text-secondary);
    font-size: 0.875rem;
}

/* Cases */
.julinai-case {
    background: var(--julinai-bg-elevated);
    border-radius: var(--julinai-radius-lg);
    overflow: hidden;
    box-shadow: var(--julinai-shadow);
}

.julinai-case__image {
    width: 100%;
    height: 180px;
    background: var(--julinai-bg-alt);
    overflow: hidden;
}

.julinai-case__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.julinai-case__body {
    padding: 24px;
}

.julinai-case__tag {
    display: inline-block;
    padding: 2px 10px;
    background: var(--julinai-primary);
    color: #fff;
    border-radius: 4px;
    font-size: 0.75rem;
    margin-bottom: 8px;
}

.julinai-case__title {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.julinai-case__desc {
    color: var(--julinai-text-secondary);
    font-size: 0.875rem;
}

/* Team */
.julinai-team__member {
    text-align: center;
    padding: 24px;
}

.julinai-team__avatar {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    margin: 0 auto 16px;
    overflow: hidden;
    background: var(--julinai-bg-alt);
}

.julinai-team__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.julinai-team__name {
    font-size: 1.0625rem;
    font-weight: 600;
}

.julinai-team__role {
    color: var(--julinai-primary);
    font-size: 0.875rem;
    margin-bottom: 8px;
}

.julinai-team__bio {
    color: var(--julinai-text-secondary);
    font-size: 0.875rem;
}

/* Testimonials */
.julinai-testimonial {
    background: var(--julinai-bg-elevated);
    padding: 32px;
    border-radius: var(--julinai-radius-lg);
    box-shadow: var(--julinai-shadow);
}

.julinai-testimonial__stars {
    color: #f59e0b;
    margin-bottom: 16px;
    font-size: 1.125rem;
    letter-spacing: 2px;
}

.julinai-testimonial__quote {
    font-style: italic;
    color: var(--julinai-text);
    margin-bottom: 20px;
    line-height: 1.7;
}

.julinai-testimonial__author strong {
    display: block;
    color: var(--julinai-text);
}

.julinai-testimonial__author span {
    color: var(--julinai-text-secondary);
    font-size: 0.875rem;
}

/* Stats */
.julinai-stats {
    text-align: center;
}

.julinai-stat__number {
    display: block;
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 4px;
}

.julinai-stat__label {
    opacity: 0.8;
    font-size: 0.875rem;
}

/* Contact */
.julinai-contact__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    text-align: center;
}

.julinai-contact__item strong {
    display: block;
    margin-bottom: 4px;
    color: var(--julinai-text);
}

.julinai-contact__item span {
    color: var(--julinai-text-secondary);
}

/* About */
.julinai-about__inner {
    max-width: 800px;
    margin: 0 auto;
}

.julinai-about__content {
    color: var(--julinai-text-secondary);
    line-height: 1.8;
}

/* CTA */
.julinai-cta {
    text-align: center;
    padding: 100px 20px;
}

.julinai-cta__inner {
    max-width: 600px;
    margin: 0 auto;
}

.julinai-cta__heading {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    margin-bottom: 16px;
}

.julinai-cta__desc {
    opacity: 0.9;
    margin-bottom: 32px;
    font-size: 1.0625rem;
}

/* Partners */
.julinai-partners__grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 32px;
    align-items: center;
}

.julinai-partner {
    padding: 16px 32px;
    background: var(--julinai-bg-elevated);
    border-radius: var(--julinai-radius);
    color: var(--julinai-text-muted);
    font-weight: 500;
    box-shadow: var(--julinai-shadow-sm);
}

/* Buttons */
.julinai-btn {
    display: inline-block;
    padding: 12px 32px;
    background: var(--julinai-primary);
    color: #fff;
    border-radius: var(--julinai-radius);
    font-weight: 600;
    text-decoration: none;
    transition: var(--julinai-transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.julinai-btn:hover {
    background: var(--julinai-primary-dark);
    color: #fff;
    transform: translateY(-1px);
}

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

.julinai-btn--light:hover {
    background: #f8fafc;
    color: var(--julinai-primary-dark);
}

.julinai-btn--lg {
    padding: 16px 40px;
    font-size: 1.0625rem;
}

/* Services section background */
.julinai-services {
    background: var(--julinai-bg-alt);
    padding: 80px 20px;
}

/* Advantages section */
.julinai-advantages {
    padding: 80px 20px;
}

/* Cases section */
.julinai-cases {
    background: var(--julinai-bg-alt);
    padding: 80px 20px;
}

/* Team section */
.julinai-team {
    padding: 80px 20px;
}

/* Testimonials section */
.julinai-testimonials {
    background: var(--julinai-bg-alt);
    padding: 80px 20px;
}

/* Stats section */
.julinai-stats {
    padding: 80px 20px;
}

/* Contact section */
.julinai-contact {
    padding: 80px 20px;
}

/* About section */
.julinai-about {
    padding: 80px 20px;
}

/* Partners section */
.julinai-partners {
    background: var(--julinai-bg-alt);
    padding: 80px 20px;
}

/* Products section */
.julinai-products {
    padding: 80px 20px;
}

/* Dark mode adjustments for AI sections */
[data-theme="dark"] .julinai-card,
[data-theme="dark"] .julinai-testimonial,
[data-theme="dark"] .julinai-case,
[data-theme="dark"] .julinai-partner {
    background: var(--julinai-bg-elevated);
}

[data-theme="dark"] .julinai-services,
[data-theme="dark"] .julinai-cases,
[data-theme="dark"] .julinai-testimonials,
[data-theme="dark"] .julinai-partners {
    background: var(--julinai-bg-alt);
}

[data-theme="dark"] .julinai-case__image {
    background: #1e293b;
}

[data-theme="dark"] .julinai-team__avatar {
    background: #1e293b;
}