/* ============================================
   SSM Portfolio — Minimalist Design
   ============================================ */

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

:root {
    --color-white: #ffffff;
    --color-bg: #fafafa;
    --color-light-gray: #f0f0f0;
    --color-mid-gray: #c0c0c0;
    --color-dark-gray: #555555;
    --color-black: #1a1a1a;
    --color-accent: #c8a97e;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Playfair Display', Georgia, serif;
    --transition: 0.3s ease;
    --container-max: 1200px;
    --section-padding: 100px;
}

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

body {
    font-family: var(--font-main);
    color: var(--color-black);
    background-color: var(--color-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* ---------- Container ---------- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Section Titles ---------- */
.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-black);
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--color-dark-gray);
    margin-bottom: 48px;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-block;
    padding: 14px 36px;
    font-family: var(--font-main);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
}

.btn--primary {
    background-color: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-black);
}

.btn--primary:hover {
    background-color: var(--color-dark-gray);
    border-color: var(--color-dark-gray);
}

.btn--outline {
    background-color: transparent;
    color: var(--color-black);
    border-color: var(--color-black);
}

.btn--outline:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

.btn--small {
    padding: 10px 24px;
    font-size: 0.8rem;
}

.btn--full {
    width: 100%;
}

/* ---------- Header ---------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-light-gray);
    transition: box-shadow var(--transition);
}

.header--scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

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

.header__logo {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.header__menu {
    display: flex;
    gap: 36px;
}

.header__link {
    font-size: 0.88rem;
    font-weight: 400;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    position: relative;
    padding: 4px 0;
}

.header__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1.5px;
    background-color: var(--color-black);
    transition: width var(--transition);
}

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

/* Burger */
.header__burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1100;
}

.header__burger span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-black);
    transition: all var(--transition);
}

.header__burger--active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.header__burger--active span:nth-child(2) {
    opacity: 0;
}

.header__burger--active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

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

.hero__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding-top: 60px;
    padding-bottom: 60px;
}

.hero__tag {
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.hero__title {
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero__subtitle {
    font-size: 1.15rem;
    color: var(--color-dark-gray);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 480px;
}

.hero__actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero__visual {
    display: flex;
    justify-content: center;
}

.hero__photo {
    width: 100%;
    max-width: 440px;
    aspect-ratio: 4 / 5;
    overflow: hidden;
    background-color: var(--color-light-gray);
}

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

/* ---------- About ---------- */
.about {
    padding: var(--section-padding) 0;
}

.about__inner {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: start;
}

.about__photo {
    width: 100%;
    aspect-ratio: 4 / 5;
    overflow: hidden;
    background-color: var(--color-light-gray);
}

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

.about__text {
    font-size: 1.05rem;
    color: var(--color-dark-gray);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about__directions {
    margin-top: 32px;
}

.about__directions h3,
.about__education h3 {
    font-family: var(--font-main);
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 12px;
    color: var(--color-black);
}

.about__directions ul {
    list-style: none;
    padding: 0;
}

.about__directions li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    color: var(--color-dark-gray);
    font-size: 0.98rem;
}

.about__directions li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 1.5px;
    background-color: var(--color-accent);
}

.about__education {
    margin-top: 28px;
}

.about__education p {
    color: var(--color-dark-gray);
    font-size: 0.98rem;
    line-height: 1.7;
}

/* ---------- Cases ---------- */
.cases {
    padding: var(--section-padding) 0;
    background-color: var(--color-bg);
}

.cases__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.case-card {
    background-color: var(--color-white);
    overflow: hidden;
    border: 1px solid var(--color-light-gray);
    transition: transform var(--transition), box-shadow var(--transition);
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.case-card__image {
    width: 100%;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background-color: var(--color-light-gray);
}

.case-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.case-card:hover .case-card__image img {
    transform: scale(1.04);
}

.case-card__body {
    padding: 28px;
}

.case-card__niche {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 10px;
}

.case-card__title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.case-card__task,
.case-card__result {
    font-size: 0.92rem;
    color: var(--color-dark-gray);
    line-height: 1.6;
    margin-bottom: 8px;
}

.case-card__result {
    color: var(--color-black);
    font-weight: 500;
}

.case-card__btn {
    margin-top: 16px;
}

/* ---------- Portfolio ---------- */
.portfolio {
    padding: var(--section-padding) 0;
}

.portfolio__filters {
    display: flex;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.portfolio__filter {
    padding: 8px 20px;
    font-family: var(--font-main);
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    background: none;
    border: 1px solid var(--color-mid-gray);
    color: var(--color-dark-gray);
    cursor: pointer;
    transition: all var(--transition);
}

.portfolio__filter:hover,
.portfolio__filter--active {
    background-color: var(--color-black);
    border-color: var(--color-black);
    color: var(--color-white);
}

.portfolio__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.portfolio__item {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    cursor: pointer;
    background-color: var(--color-light-gray);
}

.portfolio__item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.portfolio__item:hover img {
    transform: scale(1.06);
}

.portfolio__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition);
}

.portfolio__item:hover .portfolio__overlay {
    opacity: 1;
}

.portfolio__overlay span {
    color: var(--color-white);
    font-size: 0.88rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.portfolio__item--hidden {
    display: none;
}

/* ---------- Services ---------- */
.services {
    padding: var(--section-padding) 0;
    background-color: var(--color-bg);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.service-card {
    background-color: var(--color-white);
    padding: 40px 32px;
    border: 1px solid var(--color-light-gray);
    transition: transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);
}

.service-card__icon {
    color: var(--color-accent);
    margin-bottom: 20px;
}

.service-card__title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.service-card__desc {
    font-size: 0.95rem;
    color: var(--color-dark-gray);
    line-height: 1.7;
    margin-bottom: 16px;
}

.service-card__price {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-black);
    margin-bottom: 20px;
}

.services__cta {
    text-align: center;
    margin-top: 56px;
}

/* ---------- Contacts ---------- */
.contacts {
    padding: var(--section-padding) 0;
}

.contacts__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contacts__links {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 1rem;
    color: var(--color-dark-gray);
    padding: 12px 0;
    border-bottom: 1px solid var(--color-light-gray);
    transition: color var(--transition);
}

.contact-link:hover {
    color: var(--color-black);
}

.contact-link svg {
    flex-shrink: 0;
    color: var(--color-accent);
}

/* Form */
.contacts__form {
    background-color: var(--color-bg);
    padding: 40px;
    border: 1px solid var(--color-light-gray);
}

.contacts__form-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 28px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-dark-gray);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font-main);
    font-size: 0.95rem;
    border: 1px solid var(--color-mid-gray);
    background-color: var(--color-white);
    color: var(--color-black);
    transition: border-color var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-black);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group--checkbox {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.form-group--checkbox input[type="checkbox"] {
    width: auto;
    margin-top: 3px;
    accent-color: var(--color-black);
}

.form-group--checkbox label {
    font-size: 0.85rem;
    text-transform: none;
    letter-spacing: 0;
    font-weight: 400;
    color: var(--color-dark-gray);
    margin-bottom: 0;
}

.form-success {
    display: none;
    margin-top: 16px;
    padding: 16px;
    background-color: #e8f5e9;
    color: #2e7d32;
    font-size: 0.92rem;
    text-align: center;
    border: 1px solid #c8e6c9;
}

.form-success--visible {
    display: block;
}

/* ---------- Footer ---------- */
.footer {
    padding: 32px 0;
    border-top: 1px solid var(--color-light-gray);
}

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

.footer__copy {
    font-size: 0.85rem;
    color: var(--color-dark-gray);
}

.footer__social {
    display: flex;
    gap: 20px;
}

.footer__social a {
    color: var(--color-dark-gray);
    transition: color var(--transition);
}

.footer__social a:hover {
    color: var(--color-black);
}

/* ---------- Modal ---------- */
.modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
}

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

.modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
}

.modal__content {
    position: relative;
    background: var(--color-white);
    max-width: 640px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    padding: 48px 40px;
    transform: translateY(20px);
    transition: transform var(--transition);
}

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

.modal__close {
    position: absolute;
    top: 16px;
    right: 20px;
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--color-dark-gray);
    line-height: 1;
    transition: color var(--transition);
}

.modal__close:hover {
    color: var(--color-black);
}

.modal__content h3 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    margin-bottom: 8px;
}

.modal__content h4 {
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin: 24px 0 10px;
    color: var(--color-black);
}

.modal__content p,
.modal__content li {
    font-size: 0.95rem;
    color: var(--color-dark-gray);
    line-height: 1.7;
}

.modal__content ul {
    list-style: disc;
    padding-left: 20px;
}

.modal__content li {
    margin-bottom: 6px;
}

/* ---------- Lightbox ---------- */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 3000;
    background: rgba(0, 0, 0, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
}

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

.lightbox__image {
    max-width: 90%;
    max-height: 85vh;
    object-fit: contain;
}

.lightbox__close,
.lightbox__prev,
.lightbox__next {
    position: absolute;
    background: none;
    border: none;
    color: var(--color-white);
    font-size: 2rem;
    cursor: pointer;
    padding: 12px;
    transition: opacity var(--transition);
    opacity: 0.7;
}

.lightbox__close:hover,
.lightbox__prev:hover,
.lightbox__next:hover {
    opacity: 1;
}

.lightbox__close {
    top: 20px;
    right: 24px;
    font-size: 2.4rem;
}

.lightbox__prev {
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 3rem;
}

.lightbox__next {
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 3rem;
}

/* ---------- Scroll Reveal ---------- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal--visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Responsive ---------- */

/* Tablet */
@media (max-width: 1024px) {
    :root {
        --section-padding: 72px;
    }

    .hero__title {
        font-size: 3rem;
    }

    .cases__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .portfolio__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --section-padding: 56px;
    }

    .section-title {
        font-size: 2rem;
    }

    /* Mobile Nav */
    .header__burger {
        display: flex;
    }

    .header__nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background-color: var(--color-white);
        padding: 100px 40px 40px;
        transition: right var(--transition);
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    }

    .header__nav--open {
        right: 0;
    }

    .header__menu {
        flex-direction: column;
        gap: 24px;
    }

    .header__link {
        font-size: 1rem;
    }

    /* Hero */
    .hero__inner {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero__title {
        font-size: 2.6rem;
    }

    .hero__subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero__actions {
        justify-content: center;
    }

    .hero__visual {
        order: -1;
    }

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

    /* About */
    .about__inner {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about__photo {
        max-width: 300px;
        margin: 0 auto;
    }

    /* Cases */
    .cases__grid {
        grid-template-columns: 1fr;
    }

    /* Portfolio */
    .portfolio__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    /* Services */
    .services__grid {
        grid-template-columns: 1fr;
    }

    /* Contacts */
    .contacts__inner {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contacts__form {
        padding: 28px 24px;
    }

    /* Footer */
    .footer__inner {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    /* Modal */
    .modal__content {
        padding: 36px 24px;
        width: 94%;
    }

    /* Lightbox */
    .lightbox__prev,
    .lightbox__next {
        font-size: 2rem;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .hero__title {
        font-size: 2.2rem;
    }

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

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

    .portfolio__filters {
        gap: 8px;
    }

    .portfolio__filter {
        padding: 6px 14px;
        font-size: 0.75rem;
    }
}