/* Portfolio CSS - Hypermodern 2026 Design */


:root {
    /* Colors - Light Mode */
    --color-bg: #fafafa;
    --color-bg-secondary: #ffffff;
    --color-bg-tertiary: #f4f4f5;
    --color-bg-hover: #e4e4e7;
    --color-border: rgba(0, 0, 0, 0.08);
    --color-border-hover: rgba(0, 0, 0, 0.15);
    --color-text: #18181b;
    --color-text-secondary: #52525b;
    --color-text-tertiary: #a1a1aa;
    --color-accent: #0071e3;
    --color-accent-hover: #0077ED;

    /* Effects */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);

    /* Glass */
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.5);
    --backdrop-blur: blur(12px);

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
}

/* Dark Mode */
[data-theme="dark"] {
    --color-bg: #09090b;
    --color-bg-secondary: #18181b;
    --color-bg-tertiary: #27272a;
    --color-bg-hover: #3f3f46;
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-hover: rgba(255, 255, 255, 0.2);
    --color-text: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-tertiary: #71717a;
    --color-accent: #60a5fa;
    --color-accent-hover: #93c5fd;
    --glass-bg: rgba(24, 24, 27, 0.9);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

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

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent-hover);
}

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

/* Container */
.container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* Navigation */
.nav {
    position: fixed;
    top: var(--space-4);
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    width: calc(100% - var(--space-8));
    max-width: 800px;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-5);
    background: var(--glass-bg);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
}

.nav-logo {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-text);
}

.nav-logo:hover {
    color: var(--color-accent);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--space-1);
}

.nav-link {
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text);
    background: var(--color-bg-hover);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-left: var(--space-3);
    padding-left: var(--space-3);
    border-left: 1px solid var(--color-border);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

.nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
}

.lang-switch {
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    background: var(--color-bg-tertiary);
}

.lang-switch:hover {
    color: var(--color-text);
    background: var(--color-bg-hover);
}

.theme-toggle {
    background: var(--color-bg-tertiary);
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    width: 34px;
    height: 34px;
}

.theme-toggle:hover {
    color: var(--color-text);
    background: var(--color-bg-hover);
}

.theme-toggle svg {
    width: 16px;
    height: 16px;
}

.icon-sun { display: block; }
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* Main */
.main {
    flex: 1;
    padding-top: 100px;
}

/* Sections */
.section {
    padding: var(--space-16) 0;
}

.section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-6);
}

.section-cta {
    margin-top: var(--space-8);
    text-align: center;
}

/* Hero */
.hero {
    min-height: auto;
    display: flex;
    align-items: center;
    padding: var(--space-12) 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-12);
    align-items: center;
}

.hero-text {
    max-width: 580px;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: var(--space-3);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-5);
}

.hero-profile {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

.hero-actions {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.hero-image {
    flex-shrink: 0;
}

.portrait {
    width: 240px;
    height: 240px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center 20%;
    border: 3px solid var(--color-bg-secondary);
    box-shadow: var(--shadow-lg);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--color-text);
    color: var(--color-bg);
}

.btn-primary:hover {
    opacity: 0.9;
    color: var(--color-bg);
}

.btn-secondary,
.btn-outline {
    background: var(--color-bg-secondary);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover,
.btn-outline:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

/* Quick Links */
.quick-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
}

.quick-link-card {
    background: var(--color-bg-secondary);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.quick-link-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-md);
}

.quick-link-icon {
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-3);
}

.quick-link-card:hover .quick-link-icon {
    color: var(--color-accent);
}

.quick-link-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-1);
}

.quick-link-desc {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
}

/* Experience */
.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-4);
}

.experience-card {
    background: var(--color-bg-secondary);
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

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

.experience-period {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}

.experience-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-1);
}

.experience-company {
    font-size: 0.9rem;
    color: var(--color-accent);
    margin-bottom: var(--space-3);
}

.experience-list {
    list-style: none;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.experience-list li {
    padding-left: var(--space-4);
    position: relative;
    margin-bottom: var(--space-2);
}

.experience-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 5px;
    height: 5px;
    background: var(--color-border-hover);
    border-radius: 50%;
}

/* Publications */
.publications-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.publication-item {
    background: var(--color-bg-secondary);
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.publication-type {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    background: color-mix(in srgb, var(--color-accent) 10%, transparent);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-2);
}

.publication-citation {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

.publication-citation em {
    color: var(--color-text);
}

/* Page Header */
.page-header {
    text-align: center;
    margin-bottom: var(--space-12);
    padding-top: var(--space-6);
}

.page-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin-bottom: var(--space-3);
}

.page-subtitle {
    font-size: 1rem;
    color: var(--color-text-tertiary);
}

/* Filter Tabs */
.filter-tabs {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-bottom: var(--space-10);
    flex-wrap: wrap;
}

.filter-tab {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
}

.filter-tab:hover {
    background: var(--color-bg-tertiary);
}

.filter-tab.active {
    background: var(--color-text);
    border-color: var(--color-text);
    color: var(--color-bg);
}

/* Publication Category */
.publication-category {
    margin-bottom: var(--space-10);
}

.category-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-4);
}

.category-icon {
    color: var(--color-text-tertiary);
}

.category-count {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-tertiary);
}

.publication-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.publication-card {
    display: flex;
    gap: var(--space-4);
    background: var(--color-bg-secondary);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

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

.publication-year {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-tertiary);
    flex-shrink: 0;
    width: 45px;
}

.publication-content {
    flex: 1;
}

.publication-title {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-1);
}

.publication-authors {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

.publication-details {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

/* Presentations - Year Grouped */
.presentations-grouped {
    display: flex;
    flex-direction: column;
    gap: var(--space-10);
}

.year-group {
    position: relative;
}

.year-heading {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-2);
    border-bottom: 2px solid var(--color-border);
}

.presentations-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.presentation-card {
    background: var(--color-bg-secondary);
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

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

.presentation-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.presentation-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.4;
}

.presentation-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-4);
    font-size: 0.875rem;
}

.presentation-event {
    color: var(--color-accent);
    font-weight: 500;
}

.presentation-location {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    color: var(--color-text-tertiary);
}

.presentation-location svg {
    width: 14px;
    height: 14px;
}

.presentation-role {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    background: var(--color-bg-tertiary);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    display: inline-block;
    width: fit-content;
}

/* CV Page */
.cv-page {
    padding-top: var(--space-4);
}

.cv-header {
    margin-bottom: var(--space-12);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--color-border);
}

.cv-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.cv-name {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.cv-section {
    margin-bottom: var(--space-16);
}

.cv-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--color-border);
}

.cv-item {
    margin-bottom: var(--space-10);
    padding-left: var(--space-5);
    border-left: 2px solid var(--color-border);
}

.cv-item:hover {
    border-left-color: var(--color-accent);
}

.cv-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-2);
}

.cv-item-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

.cv-item-subtitle {
    font-size: 0.9rem;
    color: var(--color-accent);
    margin-top: var(--space-1);
}

.cv-item-meta {
    text-align: right;
    flex-shrink: 0;
}

.cv-period {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

.cv-location {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    display: block;
}

.cv-list {
    list-style: none;
}

.cv-list li {
    position: relative;
    padding-left: var(--space-4);
    margin-bottom: var(--space-3);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.cv-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 4px;
    height: 4px;
    background: var(--color-border-hover);
    border-radius: 50%;
}

.cv-profile-text {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.cv-description {
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
}

.cv-subsection {
    margin-bottom: var(--space-5);
}

.cv-subsection-title {
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.85rem;
    margin-bottom: var(--space-2);
}

.cv-publication {
    font-size: 0.9rem;
    margin-bottom: var(--space-2);
    color: var(--color-text-secondary);
}

.cv-publication em {
    color: var(--color-text);
}

.cv-two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
}

.cv-info {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    background: var(--color-bg-tertiary);
    padding: var(--space-4);
    border-radius: var(--radius-md);
}

.cv-references {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-3);
}

.cv-reference {
    background: var(--color-bg-tertiary);
    padding: var(--space-4);
    border-radius: var(--radius-md);
}

.cv-reference-name {
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.9rem;
}

.cv-reference-title {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

.cv-note {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    margin-top: var(--space-3);
}

.cv-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    margin-top: var(--space-2);
    font-size: 0.85rem;
    font-weight: 500;
}

/* Footer */
.footer {
    padding: var(--space-8) 0;
    margin-top: auto;
}

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

.footer-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
}

.footer-contact a {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

.footer-copyright {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        width: calc(100% - var(--space-6));
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: calc(100% + var(--space-2));
        left: 0;
        right: 0;
        background: var(--glass-bg);
        backdrop-filter: var(--backdrop-blur);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-xl);
        flex-direction: column;
        padding: var(--space-4);
        gap: var(--space-3);
        display: none;
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-list {
        flex-direction: column;
        width: 100%;
    }

    .nav-link {
        display: block;
        text-align: center;
        padding: var(--space-3);
    }

    .nav-actions {
        margin-left: 0;
        padding-left: 0;
        padding-top: var(--space-3);
        border-left: none;
        border-top: 1px solid var(--color-border);
        justify-content: center;
        width: 100%;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-image {
        order: -1;
    }

    .portrait {
        width: 180px;
        height: 180px;
    }

    .hero-actions {
        justify-content: center;
    }

    .quick-links {
        grid-template-columns: 1fr;
    }

    .cv-item-header {
        flex-direction: column;
    }

    .cv-item-meta {
        text-align: left;
    }

    .cv-two-column {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--space-3);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-4);
    }

    .publication-card {
        flex-direction: column;
        gap: var(--space-1);
    }

    .publication-year {
        width: auto;
    }
}

/* CV Links Row */
.cv-links-row {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}