/* =============================================================================
   DufortService — main.css
   Dark Craft design system: variables, reset, typography, components, layout.
   Page-specific styles: home.css | portfolio.css | lab.css
   ============================================================================= */

/* ── Google Fonts ──────────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@500;600;700;800&family=Inter:ital,wght@0,400;0,500;1,400&display=swap');

/* ── CSS Variables ─────────────────────────────────────────────────────────── */
:root {
    /* Palette */
    --ds-base:          #0E0E0E;
    --ds-surface-1:     #141414;
    --ds-surface-2:     #1A1A1A;
    --ds-border:        #2A2A2A;
    --ds-border-hover:  #3A3A3A;
    --ds-accent:        #C17A2A;
    --ds-accent-hover:  #D48C35;
    --ds-accent-dim:    rgba(193, 122, 42, 0.12);
    --ds-text-1:        #E8E8E8;
    --ds-text-2:        #888880;
    --ds-text-3:        #555550;

    /* Typography */
    --ds-font-head: 'Syne',  sans-serif;
    --ds-font-body: 'Inter', sans-serif;

    /* Spacing */
    --ds-section-gap:  120px;
    --ds-block-pad:    80px;
    --ds-container:    1200px;
    --ds-gutter:       80px;

    /* Shape */
    --ds-radius:    8px;
    --ds-radius-sm: 6px;
    --ds-radius-xs: 4px;

    /* Motion */
    --ds-ease: 150ms ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--ds-base);
    color: var(--ds-text-1);
    font-family: var(--ds-font-body);
    font-size: 17px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; }

/* ── Container ─────────────────────────────────────────────────────────────── */
.ds-container {
    width: 100%;
    max-width: var(--ds-container);
    margin-inline: auto;
    padding-inline: var(--ds-gutter);
}

/* ── Typography ────────────────────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--ds-font-head);
    font-weight: 700;
    line-height: 1.15;
    color: var(--ds-text-1);
}

.ds-section-title {
    font-family: var(--ds-font-head);
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    color: var(--ds-text-1);
    margin-bottom: 48px;
}

.ds-page-title {
    font-family: var(--ds-font-head);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 48px;
}

.ds-text-secondary { color: var(--ds-text-2); }
.ds-text-tertiary  { color: var(--ds-text-3); }

.ds-prose p             { margin-bottom: 1.2em; color: var(--ds-text-2); }
.ds-prose h2            { font-size: 1.4rem; margin: 2em 0 0.6em; }
.ds-prose h3            { font-size: 1.15rem; margin: 1.6em 0 0.5em; }
.ds-prose ul, .ds-prose ol { padding-left: 1.4em; margin-bottom: 1.2em; }
.ds-prose li            { margin-bottom: 0.4em; color: var(--ds-text-2); }
.ds-prose strong        { color: var(--ds-text-1); font-weight: 500; }
.ds-prose a             { color: var(--ds-accent); text-decoration: underline; text-underline-offset: 3px; }
.ds-prose a:hover       { color: var(--ds-accent-hover); }

/* ── Blocks (sections) ─────────────────────────────────────────────────────── */
.ds-block {
    padding-block: var(--ds-block-pad);
}

.ds-block + .ds-block {
    border-top: 1px solid var(--ds-border);
}

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.ds-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 24px;
    border-radius: var(--ds-radius-sm);
    font-family: var(--ds-font-body);
    font-size: 14px;
    font-weight: 500;
    line-height: 1;
    transition: background var(--ds-ease), color var(--ds-ease), border-color var(--ds-ease);
    white-space: nowrap;
}

.ds-btn--primary {
    background: var(--ds-accent);
    color: #fff;
    border: 1px solid var(--ds-accent);
}
.ds-btn--primary:hover {
    background: var(--ds-accent-hover);
    border-color: var(--ds-accent-hover);
}

.ds-btn--outline {
    background: transparent;
    color: var(--ds-text-1);
    border: 1px solid var(--ds-border);
}
.ds-btn--outline:hover {
    border-color: var(--ds-accent);
    color: var(--ds-accent);
}

.ds-btn--lg { padding: 14px 32px; font-size: 15px; }

/* ── Badges ────────────────────────────────────────────────────────────────── */
.ds-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: var(--ds-radius-xs);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    background: var(--ds-surface-2);
    color: var(--ds-text-2);
    border: 1px solid var(--ds-border);
}

.ds-badge--amber {
    background: var(--ds-accent-dim);
    color: var(--ds-accent);
    border-color: rgba(193, 122, 42, 0.3);
}

/* ── Link arrow ────────────────────────────────────────────────────────────── */
.ds-link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--ds-text-2);
    transition: color var(--ds-ease);
}
.ds-link-arrow:hover { color: var(--ds-accent); }

/* ── Header ────────────────────────────────────────────────────────────────── */
.ds-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(14, 14, 14, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--ds-border);
}

.ds-header__inner {
    display: flex;
    align-items: center;
    gap: 32px;
    height: 68px;
}

.ds-header__logo {
    flex-shrink: 0;
}

.ds-logo-text {
    font-family: var(--ds-font-head);
    font-size: 18px;
    font-weight: 700;
    color: var(--ds-text-1);
    letter-spacing: -0.01em;
}

.ds-nav { flex: 1; }

.ds-nav__list {
    display: flex;
    gap: 4px;
    align-items: center;
}

.ds-nav__list a {
    padding: 6px 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--ds-text-2);
    border-radius: var(--ds-radius-xs);
    transition: color var(--ds-ease), background var(--ds-ease);
}
.ds-nav__list a:hover,
.ds-nav__list .current-menu-item > a,
.ds-nav__list .current_page_item > a {
    color: var(--ds-text-1);
    background: var(--ds-surface-2);
}

.ds-header__actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

/* Lang switcher */
.ds-lang-switcher { display: flex; align-items: center; gap: 8px; }
.ds-lang-switcher a, .ds-lang-item a {
    font-size: 12px;
    font-weight: 500;
    color: var(--ds-text-3);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color var(--ds-ease);
}
.ds-lang-item a:hover,
.ds-lang-item--active a,
.ds-lang-switcher .current-lang a {
    color: var(--ds-accent);
}
.ds-lang-item + .ds-lang-item::before {
    content: '·';
    color: var(--ds-border-hover);
    margin-right: 8px;
}

/* Mobile menu toggle */
.ds-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    border-radius: var(--ds-radius-xs);
}
.ds-menu-toggle__bar {
    display: block;
    width: 22px;
    height: 1.5px;
    background: var(--ds-text-2);
    border-radius: 2px;
    transition: transform var(--ds-ease), opacity var(--ds-ease);
}
.ds-menu-toggle[aria-expanded="true"] .ds-menu-toggle__bar:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
.ds-menu-toggle[aria-expanded="true"] .ds-menu-toggle__bar:nth-child(2) { opacity: 0; }
.ds-menu-toggle[aria-expanded="true"] .ds-menu-toggle__bar:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px); }

/* Mobile nav */
.ds-mobile-nav {
    display: none;
    border-top: 1px solid var(--ds-border);
    background: var(--ds-surface-1);
}
.ds-mobile-nav.is-open { display: block; }
.ds-mobile-nav .ds-container { padding-block: 24px; }
.ds-mobile-nav__list { display: flex; flex-direction: column; gap: 4px; }
.ds-mobile-nav__list a {
    display: block;
    padding: 10px 12px;
    font-size: 15px;
    color: var(--ds-text-2);
    border-radius: var(--ds-radius-xs);
}
.ds-mobile-nav__list a:hover { color: var(--ds-text-1); background: var(--ds-surface-2); }
.ds-lang-switcher--mobile { margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--ds-border); }

/* ── Footer ────────────────────────────────────────────────────────────────── */
.ds-footer {
    border-top: 1px solid var(--ds-border);
    padding-block: 56px;
}

.ds-footer__inner {
    display: flex;
    align-items: flex-start;
    gap: 48px;
    flex-wrap: wrap;
}

.ds-footer__brand { flex: 1; min-width: 200px; }

.ds-footer__logo {
    font-family: var(--ds-font-head);
    font-size: 16px;
    font-weight: 700;
    color: var(--ds-text-1);
    display: inline-block;
    margin-bottom: 8px;
}

.ds-footer__tagline {
    font-size: 13px;
    color: var(--ds-text-3);
}

.ds-footer__nav-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 24px;
}
.ds-footer__nav-list a {
    font-size: 13px;
    color: var(--ds-text-3);
    transition: color var(--ds-ease);
}
.ds-footer__nav-list a:hover { color: var(--ds-text-2); }

/* ── Page Header (service pages, etc.) ────────────────────────────────────── */
.ds-page-header { padding-top: 80px; }

.ds-page-header__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.ds-page-header__title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin: 12px 0 20px;
}

.ds-page-header__subtitle {
    font-size: 18px;
    color: var(--ds-text-2);
    margin-bottom: 32px;
    line-height: 1.6;
}

.ds-page-header__img {
    border-radius: var(--ds-radius);
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

/* ── Service sections ──────────────────────────────────────────────────────── */
.ds-svc-section__title {
    font-size: clamp(1.4rem, 2.5vw, 2rem);
    margin-bottom: 24px;
}

.ds-svc-section--text .ds-svc-section__body { max-width: 720px; }

/* Audio player */
.ds-audio-list { display: flex; flex-direction: column; gap: 12px; }
.ds-audio-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--ds-surface-1);
    border: 1px solid var(--ds-border);
    border-radius: var(--ds-radius);
    transition: border-color var(--ds-ease);
}
.ds-audio-item:hover { border-color: var(--ds-border-hover); }
.ds-audio-item__play {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--ds-accent);
    color: #fff;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background var(--ds-ease);
}
.ds-audio-item__play:hover { background: var(--ds-accent-hover); }
.ds-audio-item__info { flex: 1; }
.ds-audio-item__title { font-size: 14px; font-weight: 500; display: block; }
.ds-audio-item__dur   { font-size: 12px; color: var(--ds-text-3); }
.ds-audio-item__wave  { display: flex; align-items: center; gap: 2px; }
.ds-audio-item__wave span {
    display: block;
    width: 3px;
    background: var(--ds-border-hover);
    border-radius: 2px;
    animation: wave 1.2s ease-in-out infinite;
}
.ds-audio-item__wave span:nth-child(1) { height: 8px; animation-delay: 0s; }
.ds-audio-item__wave span:nth-child(2) { height: 16px; animation-delay: 0.1s; }
.ds-audio-item__wave span:nth-child(3) { height: 12px; animation-delay: 0.2s; }
.ds-audio-item__wave span:nth-child(4) { height: 20px; animation-delay: 0.3s; }
.ds-audio-item__wave span:nth-child(5) { height: 10px; animation-delay: 0.4s; }
@keyframes wave {
    0%, 100% { opacity: 0.4; }
    50%       { opacity: 1; }
}

/* Page CTA */
.ds-page-cta { background: var(--ds-surface-1); }
.ds-page-cta__inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.ds-page-cta__text { font-size: 20px; font-weight: 500; }

/* ── Contact form ───────────────────────────────────────────────────────────── */
.ds-contact__inner {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 80px;
    align-items: start;
}

.ds-contact__headline { font-size: clamp(1.75rem, 3vw, 2.5rem); margin-bottom: 20px; }
.ds-contact__intro-text { font-size: 16px; color: var(--ds-text-2); margin-bottom: 16px; }
.ds-contact__note { font-size: 14px; color: var(--ds-text-3); }

.ds-form { display: flex; flex-direction: column; gap: 24px; }

.ds-form__row--2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.ds-form__field { display: flex; flex-direction: column; gap: 8px; }

.ds-form__label {
    font-size: 13px;
    font-weight: 500;
    color: var(--ds-text-2);
    letter-spacing: 0.02em;
}

.ds-form__req { color: var(--ds-accent); margin-left: 2px; }

.ds-form__input {
    background: var(--ds-surface-1);
    border: 1px solid var(--ds-border);
    border-radius: var(--ds-radius-sm);
    color: var(--ds-text-1);
    font-size: 15px;
    padding: 12px 16px;
    transition: border-color var(--ds-ease);
    width: 100%;
}
.ds-form__input:focus {
    outline: none;
    border-color: var(--ds-accent);
}
.ds-form__input::placeholder { color: var(--ds-text-3); }

.ds-form__textarea { resize: vertical; min-height: 120px; }
.ds-form__textarea--sm { min-height: 80px; }

.ds-form__fieldset { border: none; display: flex; flex-direction: column; gap: 10px; }

.ds-form__radio-group, .ds-form__checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.ds-form__radio-label, .ds-form__checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--ds-text-2);
    cursor: pointer;
    padding: 8px 14px;
    border: 1px solid var(--ds-border);
    border-radius: var(--ds-radius-sm);
    transition: border-color var(--ds-ease), color var(--ds-ease);
}
.ds-form__radio-label:hover, .ds-form__checkbox-label:hover {
    border-color: var(--ds-border-hover);
    color: var(--ds-text-1);
}
.ds-form__radio-label:has(input:checked),
.ds-form__checkbox-label:has(input:checked) {
    border-color: var(--ds-accent);
    color: var(--ds-accent);
    background: var(--ds-accent-dim);
}
.ds-form__radio-label input, .ds-form__checkbox-label input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.ds-form__file {
    cursor: pointer;
    color: var(--ds-text-2);
    padding: 10px 16px;
}
.ds-form__file-note { font-size: 12px; color: var(--ds-text-3); }
.ds-form__file::-webkit-file-upload-button {
    background: var(--ds-surface-2);
    color: var(--ds-text-2);
    border: 1px solid var(--ds-border);
    border-radius: var(--ds-radius-xs);
    padding: 6px 12px;
    font-size: 13px;
    cursor: pointer;
    margin-right: 12px;
}

.ds-form__submit { align-self: flex-start; }

.ds-form-error {
    padding: 14px 16px;
    background: rgba(193, 50, 50, 0.12);
    border: 1px solid rgba(193, 50, 50, 0.3);
    border-radius: var(--ds-radius-sm);
    color: #f08080;
    font-size: 14px;
}

.ds-form-status {
    padding: 14px 16px;
    border-radius: var(--ds-radius-sm);
    font-size: 14px;
}
.ds-form-status--success {
    background: rgba(30, 120, 60, 0.12);
    border: 1px solid rgba(30, 120, 60, 0.3);
    color: #6fcf97;
}
.ds-form-status--error {
    background: rgba(193, 50, 50, 0.12);
    border: 1px solid rgba(193, 50, 50, 0.3);
    color: #f08080;
}

/* ── Thank you + 404 ────────────────────────────────────────────────────────── */
.ds-thankyou__inner, .ds-404__inner {
    text-align: center;
    max-width: 520px;
    margin-inline: auto;
    padding-block: 80px;
}
.ds-thankyou__icon { font-size: 48px; color: var(--ds-accent); margin-bottom: 24px; }
.ds-thankyou__title, .ds-404__title { font-size: 2rem; margin-bottom: 16px; }
.ds-thankyou__text, .ds-404 p { color: var(--ds-text-2); margin-bottom: 32px; }
.ds-404__code { display: block; font-family: var(--ds-font-head); font-size: 6rem; font-weight: 800; color: var(--ds-border-hover); margin-bottom: 8px; }

/* ── Case study ─────────────────────────────────────────────────────────────── */
.ds-case-header { padding-bottom: 40px; }
.ds-case-header__meta { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.ds-case-header__year { font-size: 13px; color: var(--ds-text-3); }
.ds-case-header__title { font-size: clamp(2rem, 4vw, 3.5rem); margin-bottom: 20px; }
.ds-case-cover { max-height: 480px; overflow: hidden; }
.ds-case-cover__img { width: 100%; height: 480px; object-fit: cover; }
.ds-case-body__grid { display: grid; grid-template-columns: 280px 1fr; gap: 80px; align-items: start; padding-top: 60px; }
.ds-case-meta-block { margin-bottom: 32px; }
.ds-case-meta-block__label { font-size: 11px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ds-accent); margin-bottom: 8px; }
.ds-case-meta-block p { font-size: 15px; color: var(--ds-text-2); }
.ds-gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.ds-gallery__img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: var(--ds-radius); }
.ds-case-nav__inner { padding-block: 40px; }

/* ── Lab article ────────────────────────────────────────────────────────────── */
.ds-lab-header { padding-bottom: 40px; }
.ds-lab-header__meta { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.ds-lab-header__date, .ds-lab-header__read { font-size: 13px; color: var(--ds-text-3); }
.ds-lab-header__title { font-size: clamp(1.75rem, 3.5vw, 3rem); }
.ds-lab-cover { max-height: 400px; overflow: hidden; margin-bottom: 0; }
.ds-lab-cover__img { width: 100%; height: 400px; object-fit: cover; }
.ds-lab-body { max-width: 720px; margin-inline: auto; }
.ds-lab-service-cta {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
    padding: 24px;
    border: 1px solid var(--ds-border);
    border-radius: var(--ds-radius);
    margin-block: 40px;
}
.ds-lab-service-cta__text { font-size: 13px; color: var(--ds-text-3); }

/* ── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
    :root {
        --ds-gutter: 40px;
        --ds-block-pad: 60px;
        --ds-section-gap: 80px;
    }

    .ds-page-header__inner,
    .ds-case-body__grid { grid-template-columns: 1fr; gap: 40px; }

    .ds-contact__inner { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 768px) {
    :root {
        --ds-gutter: 24px;
        --ds-block-pad: 48px;
    }

    .ds-nav, .ds-header__cta { display: none; }
    .ds-menu-toggle { display: flex; }

    .ds-form__row--2col { grid-template-columns: 1fr; }

    .ds-footer__inner { flex-direction: column; gap: 32px; }
}

@media (max-width: 480px) {
    :root { --ds-gutter: 20px; }
    .ds-btn--lg { width: 100%; justify-content: center; }
    .ds-case-cover__img { height: 240px; }
}

/* ── Utilities ──────────────────────────────────────────────────────────────── */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

[hidden] { display: none !important; }

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