/* ============================================
   YAËL KOLB — PORTFOLIO REDESIGN 2026
   Modern, minimalistisch, künstlerisch
   ============================================ */

/* CSS Custom Properties */
:root {
    --color-bg: #0a0a0a;
    --color-bg-elevated: #141414;
    --color-text: #f5f5f5;
    --color-text-secondary: #888888;
    --color-accent: #ff6b35;
    --color-border: #222222;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    --header-height: 80px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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



/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--header-height);
    backdrop-filter: blur(20px);
    background: rgba(10, 10, 10, 0.8);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-base);
}

.header--scrolled {
    border-color: var(--color-border);
}

.header__inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    position: relative;
}

.logo::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}

.logo:hover::after {
    width: 100%;
}

/* Navigation */
.nav__list {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav__link {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    transition: color var(--transition-base);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}

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

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

.nav__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
    padding: 4px;
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 1px;
    background: var(--color-text);
    transition: var(--transition-base);
}

/* Hero Section */
.hero {
    min-height: calc(100vh - var(--header-height));
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: calc(var(--header-height) + 4rem) 2rem 8rem;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.hero__content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6rem;
    width: 100%;
}

.hero__text {
    flex: 1;
    padding-right: 2rem;
}

.hero__portrait {
    width: 320px;
    height: 320px;
    border-radius: 50%;
    object-fit: cover;
    display: block;
    flex-shrink: 0;
    margin-right: 2rem;
}

.hero__title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 7vw, 6rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: 2rem;
}

.hero__title-line {
    display: block;
    opacity: 0;
    transform: translateY(40px);
    animation: fadeInUp 0.8s ease forwards;
}

.hero__title-line:nth-child(1) { animation-delay: 0.2s; }
.hero__title-line:nth-child(2) { animation-delay: 0.4s; }
.hero__title-line:nth-child(3) { animation-delay: 0.6s; }

.hero__subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    font-weight: 300;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.8s forwards;
}

.hero__chevron {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: opacity 0.3s ease;
    z-index: 10;
}

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

.hero__chevron-text {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.hero__chevron svg {
    animation: bounceDown 2s ease-in-out infinite;
}

@keyframes bounceDown {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(8px);
    }
}

/* Projects Section */
.projects {
    max-width: 1400px;
    margin: 0 auto;
    padding: 6rem 2rem;
}

.projects__header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 4rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
}

/* Filter */
.filter {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 5;
}

.filter__btn {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    padding: 0.5rem 1.25rem;
    font-family: var(--font-primary);
    font-size: 0.8125rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all var(--transition-base);
    border-radius: 100px;
}

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

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

/* Projects Grid */
.projects__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.project-card {
    opacity: 0;
    transform: translateY(30px);
}

.project-card.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.project-card__link {
    display: block;
    position: relative;
    overflow: hidden;
    border-radius: 4px;
}

.project-card__image {
    position: relative;
    width: 100%;
    height: 0;
    padding-top: 54.054%; /* 1.85:1 */
    overflow: hidden;
    background: var(--color-bg-elevated);
}

.project-card__image img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    max-width: none;
    object-fit: cover;
    transition: transform var(--transition-slow), filter var(--transition-slow);
    filter: grayscale(20%);
}

.project-card__link:hover .project-card__image img {
    transform: scale(1.05);
    filter: grayscale(0%);
}

.project-card__info {
    padding: 1.5rem 0;
}

.project-card__category {
    display: inline-block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: opacity var(--transition-base);
}

.project-card__category:hover {
    opacity: 0.7;
}

.project-card__title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    transition: color var(--transition-base);
}

.project-card__link:hover .project-card__title {
    color: var(--color-accent);
}

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

/* Project Detail Page */
.project-hero {
    min-height: 70vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: calc(var(--header-height) + 4rem) 2rem 4rem;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.project-hero__backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.project-hero__backdrop img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-hero__backdrop::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 25%;
    background: linear-gradient(to bottom, rgba(10, 10, 10, 0.35), transparent);
    z-index: 1;
}

.project-hero__backdrop::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60%;
    background: linear-gradient(to top, var(--color-bg), transparent);
    z-index: 1;
}

.project-hero__content {
    position: relative;
    z-index: 1;
}

.project-hero__meta {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.project-hero__category,
.project-hero__date {
    font-size: 0.8125rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.375rem 0.875rem;
    border-radius: 100px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.project-hero__category {
    color: var(--color-accent);
}

.project-hero__date {
    color: var(--color-text);
}

.project-hero__title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 7vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    max-width: 1200px;
}

.project-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem 6rem;
}

.project-description {
    max-width: 1000px;
    margin-bottom: 4rem;
}

.project-description + .project-gallery {
    margin-top: 4rem;
}

.project-description p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
}

.project-credits {
    margin-bottom: 4rem;
    padding: 2rem;
    background: var(--color-bg-elevated);
    border-radius: 4px;
}

.project-credits__title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
    color: var(--color-accent);
}

.credit-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.75rem;
    align-items: flex-start;
}

.credit-label {
    font-weight: 500;
    width: 140px;
    flex-shrink: 0;
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.4;
}

.credit-value {
    color: var(--color-text);
    font-size: 0.9375rem;
    flex: 1;
    line-height: 1.4;
}

.project-gallery {
    position: relative;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.project-gallery.is-loaded {
    opacity: 1;
}

.project-gallery__item {
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    line-height: 0;
}

.project-gallery__item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-slow);
}

.project-gallery__item:hover img {
    transform: scale(1.02);
}

.project-nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 3rem 2rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
}

.project-nav__link {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.project-nav__label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-secondary);
}

.project-nav__title {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    transition: color var(--transition-base);
}

.project-nav__link:hover .project-nav__title {
    color: var(--color-accent);
}

/* About Page */
.about {
    max-width: 1400px;
    margin: 0 auto;
    padding: calc(var(--header-height) + 6rem) 2rem 6rem;
}

.about__header {
    margin-bottom: 4rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 3rem;
}

.about__header-text {
    flex: 1;
}

.about__title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.about__subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.about__portrait {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    display: block;
    flex-shrink: 0;
}

.timeline {
    position: relative;
    max-width: 800px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--color-border);
}

.timeline__item {
    position: relative;
    padding-left: 3rem;
    padding-bottom: 3rem;
    opacity: 0;
    transform: translateX(-20px);
}

.timeline__item.is-visible {
    animation: fadeInLeft 0.6s ease forwards;
}

.timeline__item::before {
    content: '';
    position: absolute;
    left: -4px;
    top: 0.5rem;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--color-accent);
}

.timeline__date {
    font-size: 0.875rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.timeline__title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline__description {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.timeline__link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
    color: var(--color-accent);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: gap var(--transition-base);
}

.timeline__link:hover {
    gap: 0.75rem;
}

/* Contact Page */
.contact {
    max-width: 1400px;
    margin: 0 auto;
    padding: calc(var(--header-height) + 6rem) 2rem 6rem;
}

.contact__header {
    margin-bottom: 4rem;
}

.contact__title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.contact__subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
}

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1000px;
}

@media (max-width: 768px) {
    .contact__grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

.contact-info__item {
    margin-bottom: 2rem;
}

.contact-info__label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.contact-info__value {
    font-size: 1.125rem;
    color: var(--color-text);
}

.contact-info__value a {
    transition: color var(--transition-base);
}

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

.contact-form__group {
    margin-bottom: 1.5rem;
}

.contact-form__label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
    color: var(--color-text-secondary);
}

.contact-form__input,
.contact-form__textarea {
    width: 100%;
    padding: 1rem;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: border-color var(--transition-base);
    border-radius: 4px;
}

.contact-form__input:focus,
.contact-form__textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.contact-form__textarea {
    min-height: 150px;
    resize: vertical;
}

.contact-form__checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.contact-form__checkbox input {
    margin-top: 0.25rem;
    accent-color: var(--color-accent);
}

.contact-form__checkbox label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    background: var(--color-text);
    color: var(--color-bg);
    font-family: var(--font-primary);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    border-radius: 4px;
}

.btn:hover {
    background: var(--color-accent);
    color: var(--color-text);
    transform: translateY(-2px);
}

/* Footer */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 2rem;
}

.footer__inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.footer__link {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-base);
}

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

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    touch-action: pan-y;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox__content {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    padding: 4rem;
}

.lightbox__img-wrapper {
    width: 85vw;
    height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.lightbox__img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    opacity: 1;
    transition: opacity 200ms ease;
    will-change: opacity;
    position: absolute;
    inset: 0;
    margin: auto;
}

.lightbox__img--next {
    opacity: 0;
}

.lightbox__close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 2rem;
    cursor: pointer;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-base);
    z-index: 10;
}

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

.lightbox__nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--color-text);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    z-index: 10;
}

.lightbox__nav:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-accent);
}

.lightbox__nav--prev {
    left: 1.5rem;
}

.lightbox__nav--next {
    right: 1.5rem;
}

.lightbox__counter {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    padding: 0.375rem 1rem;
    border-radius: 100px;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

@media (max-width: 768px) {
    .lightbox__nav {
        display: none;
    }
    
    .lightbox__content {
        padding: 2rem;
    }
}

/* Animations */
@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}



/* Responsive */
@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }

    .header__inner {
        padding: 0 1.5rem;
    }

    .nav__toggle {
        display: flex;
    }

    .nav__list {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

    .nav__list--open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .hero {
        padding: calc(var(--header-height) + 3rem) 1.5rem 3rem;
    }

    .hero__content {
        flex-direction: column-reverse;
        align-items: flex-start;
        gap: 2rem;
    }

    .hero__portrait {
        width: 160px;
        height: 160px;
    }

    .about__header {
        flex-direction: column;
        align-items: flex-start;
        gap: 2rem;
    }

    .about__portrait {
        width: 160px;
        height: 160px;
    }

    .projects {
        padding: 4rem 1.5rem;
    }

    .projects__header {
        flex-direction: column;
        align-items: flex-start;
    }

    .projects__grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .project-content,
    .about,
    .contact {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }

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

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

    .project-gallery__item--wide {
        grid-column: span 1;
    }

    .footer__inner {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print */
@media print {
    .header,
    .footer,
    .cursor,
    .hero__scroll {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }
}