/* ===================================
   Dina Ufimtseva Portfolio
   Minimalist design inspired by Anthropic/Claude
   =================================== */

:root {
    /* Colors - Warm, subtle palette */
    --color-bg: #FAF9F7;
    --color-bg-alt: #F5F3F0;
    --color-surface: #FFFFFF;
    --color-text: #1A1A1A;
    --color-text-secondary: #666666;
    --color-text-tertiary: #999999;
    --color-accent: #CC785C;
    --color-accent-hover: #B5684D;
    --color-border: #E8E6E3;
    --color-border-light: #F0EEED;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Layout */
    --max-width: 1200px;
    --nav-height: 64px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

/* ===================================
   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(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ===================================
   Typography
   =================================== */

h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    margin-bottom: var(--space-lg);
}

h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
}

p {
    color: var(--color-text-secondary);
}

/* ===================================
   Navigation
   =================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(250, 249, 247, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-light);
}

.nav-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-links a {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--color-text);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--nav-height) + var(--space-3xl)) var(--space-xl) var(--space-3xl);
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--space-4xl);
    align-items: center;
}

.hero-text h1 {
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.7;
    max-width: 560px;
    margin-bottom: var(--space-xl);
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    filter: grayscale(10%);
}

/* ===================================
   Buttons
   =================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

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

.btn-primary:hover {
    background: #333;
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    border-color: var(--color-text);
}

/* ===================================
   Projects Section
   =================================== */

.projects {
    padding: var(--space-4xl) var(--space-xl);
    background: var(--color-surface);
}

.section-header {
    max-width: var(--max-width);
    margin: 0 auto var(--space-3xl);
    text-align: center;
}

.section-header p {
    font-size: 1rem;
}

.project-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.project-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform var(--transition-slow), box-shadow var(--transition-slow);
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.project-image {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--color-bg-alt);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.03);
}

.project-image.placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, #E8E6E3 100%);
}

.placeholder-content span {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-tertiary);
}

.project-info {
    padding: var(--space-lg);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
}

.tag {
    font-size: 0.75rem;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
}

.project-info h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.project-info p {
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: var(--space-sm);
}

.project-date {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
}

.projects-more {
    max-width: var(--max-width);
    margin: var(--space-2xl) auto 0;
    text-align: center;
}

.link-arrow {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    transition: gap var(--transition-base);
}

.link-arrow::after {
    content: '\2192';
}

.link-arrow:hover {
    gap: var(--space-sm);
}

/* ===================================
   About Section
   =================================== */

.about {
    padding: var(--space-4xl) var(--space-xl);
    background: var(--color-bg);
}

.about-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--space-4xl);
}

.about-lead {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
}

.about-text p {
    margin-bottom: var(--space-md);
}

.about-skills,
.about-tools {
    margin-top: var(--space-2xl);
}

.about-skills h3,
.about-tools h3,
.about-experience h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-md);
}

.skills-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
}

.skills-list li {
    font-size: 0.875rem;
    color: var(--color-text);
    padding-left: var(--space-md);
    position: relative;
}

.skills-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 4px;
    height: 4px;
    background: var(--color-accent);
    border-radius: 50%;
}

.tools-list {
    font-size: 0.875rem;
    color: var(--color-text);
}

.about-experience h3 {
    margin-top: var(--space-2xl);
}

.about-experience h3:first-child {
    margin-top: 0;
}

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

.experience-item {
    display: flex;
    gap: var(--space-lg);
}

.experience-date {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    min-width: 80px;
    padding-top: 2px;
}

.experience-details h4 {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.experience-details p {
    font-size: 0.875rem;
}

/* ===================================
   Contact Section
   =================================== */

.contact {
    padding: var(--space-4xl) var(--space-xl);
    background: var(--color-text);
    color: var(--color-bg);
}

.contact-content {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.contact h2 {
    color: var(--color-bg);
}

.contact p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-2xl);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: var(--space-2xl);
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-bg);
    padding: var(--space-sm) var(--space-md);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.contact-link:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.4);
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
}

.contact-icon svg {
    width: 18px;
    height: 18px;
}

/* ===================================
   Footer
   =================================== */

.footer {
    padding: var(--space-xl) var(--space-xl);
    background: var(--color-text);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.footer p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-sub {
    font-size: 0.75rem;
    margin-top: var(--space-xs);
}

/* ===================================
   Modal
   =================================== */

.project-modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.project-modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transform: translateY(20px);
    transition: transform var(--transition-slow);
}

.project-modal.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    border-radius: 50%;
    z-index: 10;
    transition: background var(--transition-fast);
}

.modal-close:hover {
    background: var(--color-bg-alt);
}

.modal-body {
    padding: var(--space-2xl);
    max-height: 90vh;
    overflow-y: auto;
}

.modal-gallery {
    display: grid;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.modal-gallery img {
    width: 100%;
    border-radius: var(--radius-md);
}

.modal-info h2 {
    margin-bottom: var(--space-md);
}

.modal-description {
    margin-bottom: var(--space-lg);
}

.modal-meta {
    display: flex;
    gap: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.modal-meta-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.modal-meta-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-tertiary);
}

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

.modal-section {
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border-light);
}

.modal-section h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-sm);
}

.modal-section p {
    font-size: 0.875rem;
    color: var(--color-text);
    line-height: 1.7;
}

.hero-sub {
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

.about-note {
    margin-top: var(--space-lg);
    padding: var(--space-md);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-style: italic;
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .hero-image {
        max-width: 280px;
        margin: 0 auto;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
}

@media (max-width: 768px) {
    .nav-links {
        gap: var(--space-lg);
    }

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

    .skills-list {
        grid-template-columns: 1fr;
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
    }

    .hero {
        min-height: auto;
        padding-top: calc(var(--nav-height) + var(--space-2xl));
    }
}

@media (max-width: 480px) {
    :root {
        --space-xl: 1.5rem;
        --space-2xl: 2rem;
        --space-3xl: 3rem;
        --space-4xl: 4rem;
    }

    .nav-content {
        padding: 0 var(--space-md);
    }

    .hero,
    .projects,
    .about,
    .contact {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

/* ===================================
   Animations
   =================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-text,
.hero-image {
    animation: fadeInUp 0.6s ease forwards;
}

.hero-image {
    animation-delay: 0.2s;
}

/* ===================================
   Modal Content - Project Cases
   =================================== */

/* Modal Header */
.modal-header {
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
    font-size: 2rem;
    margin-bottom: var(--space-md);
}

.modal-header .modal-meta {
    border-top: none;
    padding-top: 0;
}

/* Modal Body Typography */
.modal-body h2 {
    font-size: 1.5rem;
    color: var(--color-text);
    margin-top: var(--space-3xl);
    margin-bottom: var(--space-lg);
}

.modal-body h3 {
    font-size: 1.125rem;
    color: var(--color-text);
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-md);
}

.modal-body h2:first-child,
.modal-body h3:first-child {
    margin-top: 0;
}

/* Отступ перед первым h3 после мета-блока */
.modal-content-body > h3:first-child {
    margin-top: var(--space-xl);
}

.modal-body p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.modal-body p:last-child {
    margin-bottom: 0;
}

.modal-body ul,
.modal-body ol {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-lg);
}

.modal-body ul {
    list-style: disc;
}

.modal-body ol {
    list-style: decimal;
}

.modal-body li {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.modal-body a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

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

/* Horizontal Rules */
.modal-body hr {
    border: none;
    height: 1px;
    background: var(--color-border);
    margin: var(--space-2xl) 0;
}

/* Figures with Images */
.modal-figure {
    margin: var(--space-xl) 0;
}

.modal-figure img {
    width: 100%;
    border-radius: var(--radius-md);
    display: block;
}

.modal-figure figcaption {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    margin-top: var(--space-sm);
    text-align: center;
    font-style: italic;
}

/* Column Layouts (like Notion) */
.modal-columns {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
    align-items: start;
}

.modal-columns.three-col {
    grid-template-columns: repeat(3, 1fr);
}

.modal-column {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.modal-column img {
    width: 100%;
    border-radius: var(--radius-md);
    display: block;
}

.modal-column p {
    margin-bottom: var(--space-sm);
}

.modal-column h2 {
    margin-top: 0;
    margin-bottom: var(--space-md);
}

.modal-column h3 {
    margin-top: 0;
}

/* Wide column in 2-column layout */
.modal-column-wide {
    flex: 1.5;
}

.modal-columns:has(.modal-column-wide) {
    grid-template-columns: 1.5fr 1fr;
}

.modal-columns:has(.modal-column-wide:last-child) {
    grid-template-columns: 1fr 1.5fr;
}

/* Callout Blocks */
.modal-callout {
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin: var(--space-xl) 0;
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
}

.modal-callout .callout-icon {
    font-size: 1.5rem;
    line-height: 1;
    flex-shrink: 0;
}

.modal-callout p {
    margin: 0;
    color: var(--color-text);
}

.modal-callout p + p {
    margin-top: var(--space-sm);
}

.modal-callout a {
    color: var(--color-accent);
    text-decoration: underline;
}

/* Note blocks */
.modal-body .note {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    font-style: italic;
    margin: var(--space-md) 0;
}

/* Indented text */
.modal-body .indented {
    padding-left: var(--space-xl);
    border-left: 2px solid var(--color-border-light);
    margin: var(--space-md) 0;
}

/* Tags in modal */
.modal-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.modal-tags .tag {
    background: var(--color-bg);
}

/* Role and Period badges */
.modal-role {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.modal-role::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
}

/* Image grids */
.modal-image-grid {
    display: grid;
    gap: var(--space-md);
    margin: var(--space-xl) 0;
}

.modal-image-grid.two-col {
    grid-template-columns: repeat(2, 1fr);
}

.modal-image-grid.three-col {
    grid-template-columns: repeat(3, 1fr);
}

.modal-image-grid img {
    width: 100%;
    border-radius: var(--radius-md);
}

/* Responsive for modal content */
@media (max-width: 768px) {
    .modal-columns {
        grid-template-columns: 1fr;
    }

    .modal-columns:has(.modal-column-wide) {
        grid-template-columns: 1fr;
    }

    .modal-image-grid.two-col,
    .modal-image-grid.three-col {
        grid-template-columns: 1fr;
    }

    .modal-body {
        padding: var(--space-lg);
    }

    .modal-body h2 {
        font-size: 1.25rem;
        margin-top: var(--space-2xl);
    }

    .modal-body h3 {
        font-size: 1rem;
        margin-top: var(--space-xl);
    }
}