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

:root {
    --black: #111;
    --white: #fff;
    --gray: #f2f2f2;
    --gray-mid: #999;
    --font-sans: 'Inter', sans-serif;
    --font-serif: 'Cormorant Garamond', serif;
    --transition: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
    --header-h: 60px;
}

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

body {
    font-family: var(--font-sans);
    color: var(--black);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
    padding: 0 clamp(20px, 4vw, 60px);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: background var(--transition);
}

.header--transparent {
    background: transparent;
    border-bottom-color: transparent;
}

.header--transparent .header__logo,
.header--transparent .header__link {
    color: var(--white);
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}

.header--transparent .header__burger span {
    background-color: var(--white);
}

.header__logo {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 400;
    letter-spacing: 0.05em;
}

.header__nav {
    display: flex;
    gap: 2rem;
}

.header__link {
    font-size: 0.8rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    opacity: 0.7;
    transition: opacity var(--transition);
}

.header__link:hover {
    opacity: 1;
}

/* Burger */
.header__burger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.header__burger span {
    display: block;
    width: 24px;
    height: 1.5px;
    background: var(--black);
    transition: transform var(--transition), opacity var(--transition);
}

.header__burger.active span:first-child {
    transform: translateY(3.75px) rotate(45deg);
}

.header__burger.active span:last-child {
    transform: translateY(-3.75px) rotate(-45deg);
}

@media (max-width: 768px) {
    .header__burger {
        display: flex;
    }

    .header__nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2.5rem;
        background: var(--white);
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition);
    }

    .header__nav.open {
        opacity: 1;
        pointer-events: all;
    }

    .header__nav .header__link {
        font-size: 1.2rem;
        opacity: 1;
    }
}

/* ===== Hero Slider ===== */
.slider {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    background: var(--black);
}

.slider::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 180px;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), transparent);
    z-index: 2;
    pointer-events: none;
}

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

.slider__slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.8s ease;
    cursor: pointer;
}

.slider__slide.active {
    opacity: 1;
}

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

.slider__slide-info {
    position: absolute;
    bottom: 100px;
    left: clamp(20px, 4vw, 60px);
    color: var(--white);
}

.slider__slide-title {
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 4vw, 3rem);
    font-weight: 300;
    line-height: 1.2;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.slider__slide-category {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-top: 0.5rem;
    opacity: 0.7;
}

/* Slider Controls */
.slider__controls {
    position: absolute;
    bottom: 40px;
    right: clamp(20px, 4vw, 60px);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    color: var(--white);
}

.slider__arrow {
    background: none;
    border: none;
    color: var(--white);
    cursor: pointer;
    opacity: 0.6;
    transition: opacity var(--transition);
    padding: 4px;
}

.slider__arrow:hover {
    opacity: 1;
}

.slider__counter {
    font-size: 0.85rem;
    font-weight: 300;
    letter-spacing: 0.1em;
}

.slider__separator {
    margin: 0 0.3em;
    opacity: 0.4;
}

/* ===== Projects Grid ===== */
.projects {
    padding: clamp(60px, 8vw, 120px) clamp(20px, 4vw, 60px);
}

.projects__title {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 300;
    margin-bottom: clamp(30px, 4vw, 60px);
}

.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 350px), 1fr));
    gap: clamp(15px, 2vw, 30px);
}

.project-card {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 4 / 3;
}

.project-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.project-card__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 50%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: clamp(15px, 2vw, 25px);
    opacity: 0;
    transition: opacity var(--transition);
}

.project-card:hover .project-card__overlay {
    opacity: 1;
}

.project-card__title {
    color: var(--white);
    font-family: var(--font-serif);
    font-size: clamp(1rem, 1.5vw, 1.3rem);
    font-weight: 400;
}

.project-card__tags {
    color: rgba(255,255,255,0.7);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-top: 0.3rem;
}

/* ===== About ===== */
.about {
    padding: clamp(60px, 8vw, 120px) clamp(20px, 4vw, 60px);
    background: var(--gray);
}

.about__content {
    max-width: 800px;
}

.about__title {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 300;
    margin-bottom: 1.5rem;
}

.about__text {
    font-size: clamp(0.95rem, 1.2vw, 1.1rem);
    font-weight: 300;
    line-height: 1.8;
    color: #444;
}

.about__text p + p {
    margin-top: 1em;
}

/* ===== Contacts / Footer ===== */
.contacts {
    padding: clamp(40px, 6vw, 80px) clamp(20px, 4vw, 60px);
    background: var(--black);
    color: var(--white);
}

.contacts__inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 2rem;
}

.contacts__title {
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 300;
    margin-bottom: 1rem;
}

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

.contacts__links a {
    font-size: 0.9rem;
    font-weight: 300;
    opacity: 0.7;
    transition: opacity var(--transition);
}

.contacts__links a:hover {
    opacity: 1;
}

.contacts__copy {
    font-size: 0.75rem;
    opacity: 0.4;
}

/* ===== Project Detail Overlay ===== */
.project-detail {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: var(--white);
    overflow-y: auto;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
}

.project-detail.open {
    opacity: 1;
    pointer-events: all;
}

.project-detail__close {
    position: fixed;
    top: 18px;
    right: clamp(20px, 4vw, 60px);
    z-index: 210;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--black);
    opacity: 0.5;
    transition: opacity var(--transition);
    padding: 8px;
}

.project-detail__close:hover {
    opacity: 1;
}

.project-detail__content {
    padding: calc(var(--header-h) + 20px) clamp(20px, 4vw, 60px) 60px;
    max-width: 1200px;
    margin: 0 auto;
}

.project-detail__title {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 300;
    margin-bottom: 1rem;
}

.project-detail__description {
    font-size: 1rem;
    font-weight: 300;
    line-height: 1.8;
    color: #555;
    max-width: 700px;
    margin-bottom: 2rem;
}

.project-detail__modules {
    display: flex;
    flex-direction: column;
    gap: clamp(10px, 2vw, 20px);
}

.project-detail__text {
    font-size: 1rem;
    font-weight: 300;
    line-height: 1.8;
    color: #555;
    max-width: 700px;
    margin: 1rem auto;
    align-self: center;
}

.project-detail__img {
    width: 100%;
    border-radius: 2px;
}

.project-detail__gallery {
    display: flex;
    flex-direction: column;
    gap: clamp(10px, 2vw, 20px);
}

.project-detail__gallery img {
    width: 100%;
    border-radius: 2px;
}

.project-detail__figure {
    margin: 0;
}

.project-detail__figure img {
    width: 100%;
    border-radius: 2px;
}

.project-detail__caption {
    font-size: 0.9rem;
    font-weight: 300;
    line-height: 1.6;
    color: #666;
    margin: 0.5rem 0 0;
    max-width: 700px;
}

.project-detail__nav {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(0,0,0,0.1);
}

.project-detail__nav a {
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    opacity: 0.6;
    transition: opacity var(--transition);
}

.project-detail__nav a:hover {
    opacity: 1;
}

/* ===== Loading ===== */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 40vh;
    font-size: 0.85rem;
    color: var(--gray-mid);
    letter-spacing: 0.1em;
}

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

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

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

    .project-card__overlay {
        opacity: 1;
    }

    .slider__slide-title {
        font-size: 1.5rem;
    }

    .slider__controls {
        bottom: 20px;
        right: 20px;
    }

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

@media (min-width: 1400px) {
    .projects__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}