/*
================================================================================
STYLES.CSS - Michiel Dondorp Personal Site
================================================================================
Clean, minimal, professional. Inspired by tech leaders' personal sites.
================================================================================
*/

/* ===== CSS VARIABELEN ===== */
:root {
    /* Kleuren - donker, professioneel */
    --color-primary: #0f172a;           /* Bijna zwart */
    --color-primary-light: #1e293b;
    --color-accent: #3b82f6;            /* Helder blauw */
    --color-accent-light: #60a5fa;
    --color-accent-subtle: #dbeafe;
    
    /* Achtergrondkleuren */
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-dark: #0f172a;
    --color-surface: #ffffff;
    
    /* Tekstkleuren */
    --color-text: #0f172a;
    --color-text-light: #64748b;
    --color-text-muted: #94a3b8;
    --color-text-inverse: #f8fafc;
    
    /* Borders */
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    
    /* Typography */
    --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'DM Serif Display', Georgia, 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;
    --space-5xl: 8rem;
    
    /* Container */
    --container-max: 1100px;
    --container-narrow: 800px;
    --container-padding: var(--space-lg);
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-accent-light); }
ul, ol { list-style: none; }

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-text);
}

h1 { font-size: clamp(2.5rem, 6vw, 4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p { margin-bottom: var(--space-md); }
p:last-child { margin-bottom: 0; }
strong { font-weight: 600; }
em { font-style: italic; }

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

.container--narrow {
    max-width: var(--container-narrow);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

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

.btn--primary:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary-light);
    color: var(--color-text-inverse);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-border);
}

.btn--secondary:hover {
    border-color: var(--color-primary);
    background-color: var(--color-bg-alt);
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-light);
}

.header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.header__brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    text-decoration: none;
}

.header__logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: var(--radius-md);
}

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

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav__link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.nav__link:hover {
    color: var(--color-text);
}

.nav__link--active {
    color: var(--color-accent);
    font-weight: 600;
}

.nav__link--cta {
    background-color: var(--color-primary);
    color: var(--color-text-inverse) !important;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
}

.nav__link--cta:hover {
    background-color: var(--color-primary-light);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
    background: none;
    border: none;
    cursor: pointer;
}

.nav__toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--color-text);
    transition: all var(--transition-base);
}

/* ===== HERO ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    background-color: var(--color-bg);
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.hero__intro {
    font-size: 1rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
    font-weight: 500;
}

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

.hero__title em {
    color: var(--color-accent);
    font-style: normal;
}

.hero__subtitle {
    font-size: 1.15rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-xl);
    max-width: 500px;
    line-height: 1.8;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.hero__visual {
    position: relative;
    height: 450px;
}

.hero__decoration {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero__shape {
    position: absolute;
    border-radius: var(--radius-2xl);
    overflow: hidden;
}

.hero__shape--1 {
    width: 320px;
    height: 320px;
    background: linear-gradient(135deg, var(--color-primary) 0%, #334155 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-6deg);
    animation: float 8s ease-in-out infinite;
}

.hero__shape--2 {
    width: 180px;
    height: 180px;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    top: 15%;
    right: 5%;
    transform: rotate(12deg);
    animation: float 10s ease-in-out infinite reverse;
}

.hero__shape-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.hero__shape--3 {
    width: 100px;
    height: 100px;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    bottom: 15%;
    left: 15%;
    transform: rotate(45deg);
    animation: float 6s ease-in-out infinite;
}

/* ===== SECTIONS ===== */
.section {
    padding: var(--space-5xl) 0;
}

.section--light {
    background-color: var(--color-bg-alt);
}

.section--dark {
    background-color: var(--color-bg-dark);
    color: var(--color-text-inverse);
}

.section--dark .section__title {
    color: var(--color-text-inverse);
}

.section__header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-3xl);
}

.section__label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.section__label--light {
    color: var(--color-accent-light);
}

.section__title {
    margin-bottom: var(--space-md);
}

.section__subtitle {
    font-size: 1.1rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

.section--dark .section__subtitle {
    color: rgba(255, 255, 255, 0.7);
}

/* ===== ABOUT HERO ===== */
.about-hero {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--space-3xl);
    align-items: start;
    margin-bottom: var(--space-4xl);
}

.about-hero__photo {
    width: 200px;
    height: 200px;
    margin: 0 auto;
    border-radius: 50%;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-border-light), var(--color-border));
    box-shadow: var(--shadow-lg);
}

.about-hero__photo-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
}

.about-hero__photo-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.about-hero__content .section__label {
    text-align: left;
}

.about-hero__content .section__title {
    text-align: left;
    margin-bottom: var(--space-xl);
}

.about-hero__text {
    font-size: 1.05rem;
    line-height: 1.9;
}

.about-hero__text p {
    margin-bottom: var(--space-lg);
}

.about-hero__list {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-xl);
    list-style: disc;
}

.about-hero__list li {
    margin-bottom: var(--space-md);
    color: var(--color-text);
    line-height: 1.8;
}

/* ===== TECH QUOTE ===== */
.tech-quote {
    max-width: 900px;
    margin: var(--space-4xl) auto;
    padding: var(--space-2xl) var(--space-3xl);
    background: var(--color-bg);
    border-left: 4px solid var(--color-accent);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    font-family: var(--font-sans);
    line-height: 1.8;
}

.tech-quote__intro {
    font-size: 1.05rem;
    color: var(--color-text);
    margin-bottom: var(--space-xl);
    font-weight: 400;
}

.tech-quote__label {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
}

.tech-quote__label:first-of-type {
    margin-top: 0;
}

.tech-quote__list {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-lg);
}

.tech-quote__list li {
    position: relative;
    margin-bottom: var(--space-md);
    color: var(--color-text);
    font-size: 0.95rem;
    line-height: 1.7;
    padding-left: var(--space-md);
}

.tech-quote__list li::before {
    content: '→';
    position: absolute;
    left: -var(--space-lg);
    color: var(--color-accent);
    font-weight: 600;
}

.tech-quote code {
    font-family: 'SF Mono', 'Monaco', 'Cascadia Code', 'Roboto Mono', monospace;
    font-size: 0.9em;
    background: var(--color-bg-alt);
    padding: 0.15em 0.4em;
    border-radius: var(--radius-sm);
    font-weight: 500;
    color: var(--color-accent);
}

.tech-quote strong {
    font-weight: 600;
    color: var(--color-text);
}

.tech-quote__approach {
    margin-top: var(--space-xl);
    padding: var(--space-lg);
    background: var(--color-accent-subtle);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--color-text);
    border-left: 3px solid var(--color-accent);
}

.tech-quote__conclusion {
    margin-top: var(--space-xl);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.8;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

/* ===== TIMELINE ===== */
.timeline {
    display: grid;
    gap: var(--space-lg);
    max-width: 700px;
    margin: 0 auto;
}

.timeline__item {
    display: grid;
    grid-template-columns: 60px 1fr;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

.timeline__item:hover {
    border-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.timeline__year {
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    padding-top: 2px;
}

.timeline__content h3 {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.timeline__content p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ===== WORK TRACKS ===== */
.work-tracks {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.work-track {
    padding: var(--space-2xl);
    background: var(--color-bg-alt);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-light);
}

.work-track__image {
    width: 100%;
    height: 200px;
    margin-bottom: var(--space-lg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-border-light);
}

.work-track__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.work-track:hover .work-track__img {
    transform: scale(1.05);
}

.work-track__number {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.work-track__title {
    font-size: 1.35rem;
    margin-bottom: var(--space-md);
}

.work-track__description {
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
    line-height: 1.7;
}

.work-track__tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.work-track__tech li {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-light);
    background: var(--color-bg);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
}

/* ===== TRAININGS ===== */
.trainings {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.training-card {
    position: relative;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

.training-card:hover {
    background-color: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

.training-card--featured {
    border-color: var(--color-accent);
    background-color: rgba(59, 130, 246, 0.1);
}

.training-card__badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background-color: var(--color-accent);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.training-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
    color: var(--color-accent-light);
}

.training-card__title {
    font-size: 1.15rem;
    margin-bottom: var(--space-md);
    color: var(--color-text-inverse);
}

.training-card__description {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-lg);
    font-size: 0.9rem;
    line-height: 1.7;
}

.training-card__features {
    margin-bottom: var(--space-lg);
}

.training-card__features li {
    position: relative;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.training-card__features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 5px;
    height: 5px;
    background-color: var(--color-accent-light);
    border-radius: 50%;
}

.training-card__link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--color-accent-light);
}

.training-card__link:hover {
    color: white;
    gap: var(--space-md);
}

.training-note {
    text-align: center;
    margin-top: var(--space-2xl);
    padding: var(--space-lg);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
}

.training-note p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

.training-note strong {
    color: rgba(255, 255, 255, 0.9);
}

/* ===== APPROACH ===== */
.approach-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.approach-item {
    text-align: center;
    padding: var(--space-xl);
}

.approach-item__icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-lg);
}

.approach-item__title {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.approach-item__text {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ===== DOWNLOADS ===== */
.downloads-section {
    margin-top: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

.downloads-section:first-of-type {
    margin-top: var(--space-2xl);
}

.downloads-section__title {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-border);
}

.downloads-section__subtitle {
    color: var(--color-text-light);
    font-size: 0.95rem;
    margin-bottom: var(--space-xl);
}

.downloads {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.downloads__loading {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-3xl);
    color: var(--color-text-light);
}

.downloads__spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.downloads__empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-3xl);
    color: var(--color-text-light);
}

.downloads__empty svg {
    margin: 0 auto var(--space-lg);
    opacity: 0.4;
}

.downloads__empty-hint {
    font-size: 0.9rem;
    margin-top: var(--space-sm);
}

.download-card {
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-base);
}

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

.download-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    color: white;
}

.download-card__title {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.download-card__description {
    color: var(--color-text-light);
    font-size: 0.85rem;
    margin-bottom: var(--space-lg);
    flex-grow: 1;
    line-height: 1.6;
}

.download-card__links {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.download-card__link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background-color: var(--color-bg-alt);
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.85rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    text-decoration: none;
    flex: 1;
    min-width: 120px;
}

.download-card__link:hover {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
}

.download-card__link--view {
    background-color: var(--color-accent-subtle);
    color: var(--color-accent);
}

.download-card__link--view:hover {
    background-color: var(--color-accent);
    color: white;
}

.download-card__link--download {
    /* Default styling already applied */
}

/* ===== PRACTICAL EXERCISES TABS ===== */
.practical-tabs {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    border-bottom: 2px solid var(--color-border);
    flex-wrap: wrap;
}

.practical-tab {
    padding: var(--space-md) var(--space-xl);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--color-text-light);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    margin-bottom: -2px;
    position: relative;
}

.practical-tab:hover {
    color: var(--color-text);
    background-color: var(--color-bg-alt);
}

.practical-tab--active {
    color: var(--color-text);
    border-bottom-color: var(--color-primary);
    font-weight: 600;
}

.practical-tab--active:hover {
    background-color: transparent;
}

.practical-tabs-content {
    position: relative;
}

.practical-tab-panel {
    animation: fadeIn 0.3s ease-in;
}

.practical-tab-panel[hidden] {
    display: none !important;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== CONTACT ===== */
.contact-simple {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
}

.contact-simple__methods {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
    text-decoration: none;
}

.contact-method:hover {
    border-color: var(--color-accent);
    background: var(--color-accent-subtle);
}

.contact-method__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    color: var(--color-text);
}

.contact-method__info {
    text-align: left;
}

.contact-method__label {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 2px;
}

.contact-method__value {
    display: block;
    font-weight: 500;
    color: var(--color-text);
}

.contact-simple__note {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--color-bg-dark);
    color: var(--color-text-inverse);
    padding: var(--space-3xl) 0;
}

.footer__container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xl);
    text-align: center;
}

.footer__brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.footer__logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-text-inverse);
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: var(--radius-md);
}

.footer__name {
    font-weight: 600;
    font-size: 1rem;
}

.footer__tagline {
    font-size: 0.85rem;
    opacity: 0.6;
}

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

.footer__link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-inverse);
    opacity: 0.7;
    font-size: 0.9rem;
    transition: opacity var(--transition-fast);
}

.footer__link:hover {
    opacity: 1;
    color: var(--color-text-inverse);
}

.footer__copyright {
    font-size: 0.85rem;
    opacity: 0.5;
}

/* ===== ANIMATIONS ===== */
@keyframes float {
    0%, 100% { transform: translate(-50%, -50%) rotate(-6deg) translateY(0); }
    50% { transform: translate(-50%, -50%) rotate(-6deg) translateY(-15px); }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-10px); }
    20%, 40%, 60%, 80% { transform: translateX(10px); }
}

.animate-in {
    animation: fadeInUp 0.5s ease-out forwards;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero__subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero__actions {
        justify-content: center;
    }
    
    .hero__visual {
        display: none;
    }
    
    .about-hero {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .about-hero__content .section__label,
    .about-hero__content .section__title {
        text-align: center;
    }
    
    .tech-quote {
        padding: var(--space-xl) var(--space-lg);
        margin: var(--space-3xl) auto;
    }
    
    .work-tracks {
        grid-template-columns: 1fr;
    }
    
    .trainings {
        grid-template-columns: 1fr;
    }
    
    .approach-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --space-4xl: 4rem;
        --space-5xl: 5rem;
    }
    
    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        padding: var(--space-lg);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-slow);
    }
    
    .nav--open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav__list {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .nav__link {
        display: block;
        padding: var(--space-md);
        text-align: center;
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .nav__toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav__toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav__toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero {
        min-height: auto;
        padding-top: 100px;
        padding-bottom: var(--space-3xl);
    }
    
    .hero__actions {
        flex-direction: column;
    }
    
    .hero__actions .btn {
        width: 100%;
    }
    
    .timeline__item {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
    
    .footer__links {
        flex-direction: column;
        gap: var(--space-md);
    }
}

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