/* HUM Journal - Main Stylesheet */
/* Minimalist Academic / German Rationality Style */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600;700&family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root {
    --color-primary: #0A2342;
    --color-primary-light: #1E3A5F;
    --color-bg: #FFFFFF;
    --color-text: #111111;
    --color-text-secondary: #4A5568;
    --color-border: #E5E5E5;
    --color-accent: #0A2342;

    --font-heading: 'Playfair Display', 'Noto Sans SC', serif;
    --font-body: 'Inter', 'Noto Sans SC', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    --max-width: 1200px;
    --header-height: 80px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-primary);
}

h1 {
    font-size: 3.5rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.5rem;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: 1rem;
    color: var(--color-text-secondary);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: all 0.2s ease;
}

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

/* Layout */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-xl) 0;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.logo-main {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.05em;
}

.logo-sub {
    font-family: var(--font-body);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: 0.5rem 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.lang-toggle {
    display: flex;
    gap: 0.25rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.lang-toggle span {
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: all 0.2s ease;
}

.lang-toggle span.active {
    background: var(--color-primary);
    color: var(--color-bg);
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
    background: linear-gradient(180deg, var(--color-bg) 0%, #F8F9FA 100%);
}

.hero-title {
    font-size: 5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
    font-family: var(--font-body);
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
}

.hero-slogan {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-style: italic;
    color: var(--color-text);
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    max-width: 600px;
    margin: var(--spacing-md) auto;
}

/* Section Cards */
.section-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    padding: var(--spacing-lg) 0;
}

.section-card {
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.section-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--color-primary);
}

.section-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.section-card.public {
    background: #FAFAFA;
}

.section-card.academic {
    background: var(--color-bg);
}

.section-card-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.section-card-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.section-card-title-cn {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.section-card-desc {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.section-card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    color: var(--color-primary);
}

.section-card-link::after {
    content: '→';
    transition: transform 0.3s ease;
}

.section-card-link:hover::after {
    transform: translateX(4px);
}

/* Content Sections */
.content-section {
    padding: var(--spacing-lg) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    max-width: 600px;
    margin: 0 auto;
}

.divider {
    width: 60px;
    height: 2px;
    background: var(--color-primary);
    margin: var(--spacing-md) auto;
}

/* Team Section */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.team-card {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    text-align: center;
}

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

.team-avatar {
    width: 100px;
    height: 100px;
    background: var(--color-primary);
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--color-bg);
}

.team-name {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.team-name-cn {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.team-role {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
}

/* Philosophy Section */
.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.philosophy-item {
    padding: var(--spacing-md);
    border-left: 2px solid var(--color-primary);
}

.philosophy-item h4 {
    margin-bottom: var(--spacing-sm);
}

/* Journal Intro */
.intro-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.intro-block {
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.intro-block h3 {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.intro-block ul {
    list-style: none;
    margin-top: var(--spacing-md);
}

.intro-block li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--color-text-secondary);
}

.intro-block li::before {
    content: '■';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-size: 0.5rem;
    top: 0.75rem;
}

/* Submission Box */
.submission-box {
    background: var(--color-primary);
    color: var(--color-bg);
    padding: var(--spacing-lg);
    text-align: center;
    margin: var(--spacing-lg) 0;
}

.submission-box h3 {
    color: var(--color-bg);
    margin-bottom: var(--spacing-md);
}

.submission-email {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    color: var(--color-bg);
    padding: var(--spacing-md);
    border: 1px dashed rgba(255,255,255,0.3);
    display: inline-block;
    margin-bottom: var(--spacing-md);
}

.submission-format {
    background: rgba(255,255,255,0.1);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

/* Rules Section */
.rules-list {
    max-width: 800px;
    margin: 0 auto;
}

.rule-item {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    gap: var(--spacing-md);
}

.rule-number {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-primary);
    min-width: 40px;
}

.rule-content h4 {
    margin-bottom: 0.5rem;
}

.prohibited-list {
    list-style: none;
    margin-top: var(--spacing-sm);
}

.prohibited-list li {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: #FEE2E2;
    color: #991B1B;
    font-size: 0.875rem;
    margin: 0.25rem;
    border: 1px solid #FECACA;
}

/* Footer */
.footer {
    background: var(--color-primary);
    color: var(--color-bg);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-slogan {
    font-style: italic;
    opacity: 0.8;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--color-bg);
    opacity: 0.8;
    font-size: 0.875rem;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-copyright {
    width: 100%;
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.875rem;
    opacity: 0.6;
    margin-top: var(--spacing-md);
}

/* Mobile Navigation */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    margin: 5px 0;
    transition: all 0.3s ease;
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 4rem;
        --spacing-lg: 3rem;
    }

    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    .hero-title {
        font-size: 3rem;
    }

    .nav {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .section-cards {
        grid-template-columns: 1fr;
    }

    .intro-grid {
        grid-template-columns: 1fr;
    }

    .philosophy-grid {
        grid-template-columns: 1fr;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
}

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

.animate-fade-in {
    animation: fadeIn 0.6s ease forwards;
}

.animate-delay-1 {
    animation-delay: 0.1s;
}

.animate-delay-2 {
    animation-delay: 0.2s;
}

.animate-delay-3 {
    animation-delay: 0.3s;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

/* Notification Bar */
.notification-bar {
    background: #F5F5F5;
    padding: 0.75rem 0;
    text-align: center;
    border-bottom: 1px solid #E5E5E5;
}

.notification-bar p {
    font-size: 0.875rem;
    color: #666;
    margin: 0;
}

/* Core Intro Section */
.core-intro {
    padding: var(--spacing-lg) 0;
    background: #FAFAFA;
    border-bottom: 1px solid var(--color-border);
}

.intro-block-main {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: var(--spacing-lg);
}

.intro-block-main h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.intro-divider {
    width: 60px;
    height: 2px;
    background: var(--color-primary);
    margin: var(--spacing-md) auto;
}

.intro-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.intro-text-en {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

/* Category Section */
.category-section {
    padding: var(--spacing-xl) 0;
}

/* Hero Subtitle EN */
.hero-subtitle-en {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
}

/* Search Box */
.search-container {
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    padding: 0 var(--spacing-md);
}

.search-box {
    display: flex;
    gap: 0.5rem;
    padding: 1rem;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

.search-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    font-size: 1rem;
    font-family: var(--font-body);
}

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

.search-btn {
    padding: 0.75rem 1.5rem;
    background: var(--color-primary);
    color: white;
    border: none;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.2s;
}

.search-btn:hover {
    background: var(--color-primary-light);
}

/* Article List */
.article-list-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.article-section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-primary);
}

.article-section-header h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.article-section-desc {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.article-item {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.article-item:hover {
    background: #FAFAFA;
}

.article-info {
    flex: 1;
}

.article-title {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.article-title a {
    color: var(--color-primary);
}

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

.word-view-btn {
    padding: 0.5rem 1rem;
    background: var(--color-primary);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
    white-space: nowrap;
}

.word-view-btn:hover {
    background: var(--color-primary-light);
    color: white;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl) 0;
    color: var(--color-text-secondary);
}

.empty-state p {
    margin-bottom: var(--spacing-sm);
}

/* Footer Feature */
.footer-feature {
    width: 100%;
    text-align: center;
    font-size: 0.875rem;
    padding: var(--spacing-sm) 0;
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.8;
}

/* Submission Upload */
.upload-section {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-lg) 0;
}

.upload-box {
    border: 2px dashed var(--color-border);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: #FAFAFA;
}

.upload-box:hover {
    border-color: var(--color-primary);
    background: white;
}

.upload-box.dragover {
    border-color: var(--color-primary);
    background: rgba(10, 35, 66, 0.05);
}

.upload-icon {
    font-size: 3rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.upload-text {
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

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

.upload-input {
    display: none;
}

.submission-type {
    margin-bottom: var(--spacing-lg);
}

.submission-type h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.submission-type.public h3 {
    color: #2563EB;
}

.submission-type.academic h3 {
    color: #7C3AED;
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}