/* ============================================================
   partnair.no – Main Stylesheet
   Dark, respectful design for accident investigation site
   ============================================================ */

/* --- Custom Properties --- */
:root {
    --color-bg:          #0a0a0f;
    --color-bg-elevated: #12121a;
    --color-bg-card:     rgba(18, 18, 30, 0.65);
    --color-surface:     #1a1a2e;
    --color-border:      rgba(59, 130, 246, 0.12);
    --color-border-hover:rgba(59, 130, 246, 0.35);
    --color-text:        #e2e4e9;
    --color-text-muted:  #8b8fa3;
    --color-text-dim:    #5a5e72;
    --color-heading:     #f0f1f4;
    --color-accent:      #3b82f6;
    --color-accent-dim:  #2563eb;
    --color-accent-glow: rgba(59, 130, 246, 0.15);
    --color-memorial:    #94a3b8;

    --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Georgia', 'Times New Roman', serif;

    --max-width: 1120px;
    --header-h:  64px;

    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s var(--ease-in-out);
}

a:hover {
    color: #60a5fa;
}

a:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
    border-radius: 2px;
}

/* --- Utility --- */
.container {
    max-width: var(--max-width);
    margin-inline: auto;
    padding-inline: 1.5rem;
}

.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;
}

/* --- Scroll-based fade-in animations --- */
.fade-in-section {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.fade-in-section.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered card animations */
.card-grid .card:nth-child(1) { transition-delay: 0s; }
.card-grid .card:nth-child(2) { transition-delay: 0.12s; }
.card-grid .card:nth-child(3) { transition-delay: 0.24s; }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 200;
    height: var(--header-h);
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    transition: background 0.3s var(--ease-in-out);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: 100%;
    padding-inline: 2rem;
}

.site-title {
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--color-heading);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.site-nav a {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    padding: 0.35rem 0.65rem;
    border-radius: 4px;
    transition: color 0.2s, background 0.2s;
}

.site-nav a:hover {
    color: var(--color-heading);
    background: rgba(255, 255, 255, 0.06);
}

.site-nav a.active {
    color: var(--color-accent);
    background: rgba(59, 130, 246, 0.1);
}

.site-nav .nav-separator {
    color: var(--color-border);
    font-size: 0.7rem;
    user-select: none;
}

.site-nav .nav-pdf {
    font-size: 0.75rem;
    opacity: 0.6;
    margin-left: 0.25rem;
}

.site-nav .nav-pdf:hover {
    opacity: 1;
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 0.15rem;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.lang-switcher a,
.lang-switcher span {
    padding: 0.3rem 0.55rem;
    border-radius: 4px;
    transition: background 0.2s var(--ease-in-out), color 0.2s var(--ease-in-out);
}

.lang-switcher a {
    color: var(--color-text-muted);
}

.lang-switcher a:hover {
    color: var(--color-heading);
    background: rgba(255, 255, 255, 0.06);
}

.lang-switcher .active {
    color: var(--color-heading);
    background: rgba(59, 130, 246, 0.15);
}

.lang-switcher .separator {
    color: var(--color-text-dim);
    user-select: none;
}

/* Mobile header */
@media (max-width: 600px) {
    .site-header {
        height: auto;
    }
    .site-header .container {
        flex-wrap: wrap;
        padding: 0.5rem 1rem;
        gap: 0.25rem;
    }
    .site-title {
        font-size: 0.95rem;
    }
    .lang-switcher {
        font-size: 0.75rem;
    }
    .site-nav {
        order: 3;
        width: 100%;
        justify-content: center;
        gap: 0.15rem;
        padding-bottom: 0.35rem;
    }
    .site-nav a {
        font-size: 0.78rem;
        padding: 0.25rem 0.5rem;
    }
    .site-nav .nav-pdf {
        font-size: 0.7rem;
    }
    body {
        padding-top: 5.5rem;
    }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 45vh;
    padding-top: calc(var(--header-h) + 4rem);
    padding-bottom: 0;
    overflow: hidden;
    text-align: center;
}

.hero--compact {
    min-height: 20vh;
    padding-top: calc(var(--header-h) + 2rem);
    padding-bottom: 1rem;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image: var(--hero-image);
    background-size: cover;
    background-position: center 35%;
    background-repeat: no-repeat;
    filter: grayscale(30%) brightness(0.35);
    transform: scale(1.04);
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(10, 10, 15, 0.60) 0%,
        rgba(10, 10, 15, 0.45) 40%,
        rgba(10, 10, 15, 0.80) 80%,
        var(--color-bg) 100%
    );
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 680px;
    padding-inline: 1.5rem;
    animation: hero-fade-in 1.2s var(--ease-out) 0.2s both;
}

@keyframes hero-fade-in {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--color-heading);
    margin-bottom: 0.75rem;
}

.hero-meta {
    font-size: 0.95rem;
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 1.25rem;
}

.hero-description {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--color-text-muted);
    max-width: 540px;
    margin-inline: auto;
}

.scroll-indicator {
    position: absolute;
    bottom: 2.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-dim);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    animation: scroll-bounce 2.4s var(--ease-in-out) infinite;
}

.scroll-indicator svg {
    width: 20px;
    height: 20px;
    stroke: var(--color-text-dim);
}

@keyframes scroll-bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ============================================================
   SECTIONS (shared)
   ============================================================ */
.section {
    padding: 3rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    letter-spacing: -0.015em;
    color: var(--color-heading);
    margin-bottom: 1.25rem;
}

.section-text {
    max-width: 680px;
    margin-inline: auto;
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-text-muted);
}

/* Subtle top border for sections */
.section + .section {
    border-top: 1px solid var(--color-border);
}

/* ============================================================
   CARDS
   ============================================================ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.card-grid--two {
    grid-template-columns: repeat(2, 1fr);
    max-width: 700px;
    margin: 0 auto;
}

.card {
    position: relative;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 2rem 1.75rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition:
        transform 0.35s var(--ease-out),
        border-color 0.35s var(--ease-out),
        box-shadow 0.35s var(--ease-out);
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-hover);
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.08), 0 0 0 1px var(--color-border-hover);
}

.card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: var(--color-accent-glow);
    margin-bottom: 1.25rem;
}

.card-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-accent);
    fill: none;
    stroke-width: 1.75;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-heading);
    margin-bottom: 0.6rem;
}

.card-description {
    font-size: 0.925rem;
    line-height: 1.65;
    color: var(--color-text-muted);
    margin-bottom: 1.25rem;
}

.card-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.card-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.card-links a::after {
    content: '→';
    transition: transform 0.2s var(--ease-out);
}

.card-links a:hover::after {
    transform: translateX(3px);
}

.card-note {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--color-text-dim);
}

/* ============================================================
   TIMELINE
   ============================================================ */
.timeline {
    position: relative;
    max-width: 680px;
    margin-inline: auto;
    padding-left: 2.5rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5rem;
    bottom: 0.5rem;
    width: 1px;
    background: linear-gradient(
        180deg,
        transparent,
        var(--color-border-hover) 15%,
        var(--color-border-hover) 85%,
        transparent
    );
}

.timeline-item {
    position: relative;
    padding-bottom: 2.5rem;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.5rem;
    top: 0.55rem;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--color-accent-dim);
    border: 2px solid var(--color-bg);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.timeline-date {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 0.3rem;
}

.timeline-text {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 3.5rem 0 2.5rem;
    text-align: center;
}

.memorial-text {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1rem;
    color: var(--color-memorial);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.footer-copy {
    font-size: 0.75rem;
    color: var(--color-text-dim);
    letter-spacing: 0.04em;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet */
@media (max-width: 900px) {
    .card-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
        max-width: 480px;
        margin-inline: auto;
    }

    .section {
        padding: 3.5rem 0;
    }
}

/* Mobile */
@media (max-width: 600px) {
    :root {
        --header-h: 56px;
    }

    .hero {
        min-height: 28vh;
        padding-top: calc(var(--header-h) + 1.5rem);
    }

    .section {
        padding: 2rem 0;
    }

    .hero-title {
        font-size: clamp(1.6rem, 7vw, 2.2rem);
    }

    .hero-meta {
        font-size: 0.8rem;
    }

    .hero-description {
        font-size: 0.95rem;
    }

    .section-title {
        font-size: 1.35rem;
    }

    .section-text {
        font-size: 0.95rem;
    }

    .card {
        padding: 1.5rem 1.25rem;
    }

    .timeline {
        padding-left: 2rem;
    }

    .timeline-item::before {
        left: -2rem;
    }

    .scroll-indicator {
        bottom: 1.5rem;
    }

    .site-footer {
        padding: 2.5rem 0 2rem;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .fade-in-section {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .hero-content {
        animation: none;
    }

    .scroll-indicator {
        animation: none;
    }

    .card {
        transition: none;
    }
}

/* ============================================================
   TRACKER PREVIEW
   ============================================================ */
.tracker-preview {
    display: block;
    text-decoration: none;
    color: inherit;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    transition:
        border-color 0.35s var(--ease-out),
        box-shadow 0.35s var(--ease-out),
        transform 0.35s var(--ease-out);
}

.tracker-preview:hover {
    border-color: var(--color-border-hover);
    box-shadow: 0 12px 40px rgba(59, 130, 246, 0.12), 0 0 0 1px var(--color-border-hover);
    transform: translateY(-2px);
}

.tracker-preview-image {
    position: relative;
    overflow: hidden;
    max-width: 800px;
    margin: 0 auto;
    background: #0d1117;
    border-radius: 8px;
}

.tracker-preview-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: filter 0.4s var(--ease-out);
}

.tracker-preview:hover .tracker-preview-image img {
    filter: brightness(0.6);
}

.tracker-preview-overlay {
    display: none;
}

.tracker-preview-info {
    padding: 1.5rem 2rem;
    text-align: center;
}

.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: var(--color-accent);
    color: #fff;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    letter-spacing: 0.02em;
    transition: background 0.25s var(--ease-out), transform 0.25s var(--ease-out);
}

.btn:hover {
    background: #2563eb;
    transform: translateY(-1px);
}

/* ============================================================
   DATASET LIST
   ============================================================ */
.dataset-list {
    list-style: none;
    margin: 0 auto;
    padding: 0;
    max-width: 500px;
}

.dataset-list li {
    border-bottom: 1px solid var(--color-border);
}

.dataset-list li:first-child {
    border-top: 1px solid var(--color-border);
}

.dataset-list a {
    display: block;
    padding: 0.85rem 0.5rem;
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s, padding-left 0.2s;
}

.dataset-list a:hover {
    color: var(--color-accent);
    padding-left: 0.75rem;
}

/* ============================================================
   DEVICE NOTE
   ============================================================ */
.device-note {
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 1rem;
    opacity: 0.7;
}

.guide-link {
    text-align: center;
    margin-top: 0.5rem;
}

.guide-link a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s;
}

.guide-link a:hover {
    color: var(--color-heading);
    text-decoration: underline;
}

/* Data card – prominent link to underlying data */
.data-card {
    display: block;
    text-decoration: none;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    padding: 1.5rem 2rem;
    transition: background 0.25s, border-color 0.25s, transform 0.2s;
}
.data-card:hover {
    background: rgba(255,255,255,0.06);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}
.data-card-content {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
.data-card-icons {
    display: flex;
    gap: 0.5rem;
    font-size: 2rem;
    flex-shrink: 0;
}
.data-card-text h3 {
    font-size: 1.15rem;
    color: var(--color-heading);
    margin: 0 0 0.35rem;
}
.data-card-text p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin: 0;
    line-height: 1.5;
}
.data-card-arrow {
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-left: auto;
    flex-shrink: 0;
    transition: transform 0.2s;
}
.data-card:hover .data-card-arrow {
    transform: translateX(4px);
}

/* Radar page grid – side by side */
.radar-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}
@media (max-width: 768px) {
    .radar-grid { grid-template-columns: 1fr; }
}
.radar-grid-title {
    font-size: 1.1rem;
    color: var(--color-heading);
    margin-bottom: 0.4rem;
    font-weight: 600;
}
.radar-grid-description {
    font-size: 0.85rem;
    color: var(--color-text-muted, #94a3b8);
    margin: 0;
    padding: 0.75rem 1rem 1.25rem;
    line-height: 1.4;
}
.radar-grid-item .tracker-preview {
    margin-bottom: 0;
    border-radius: 0;
}

/* Tracker card wrapper */
.tracker-card {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px;
    overflow: hidden;
    transition: border-color 0.2s;
}
.tracker-card:hover {
    border-color: rgba(255,255,255,0.15);
}
.tracker-card .tracker-preview {
    border-radius: 0;
    border: none;
    margin-bottom: 0;
}
.tracker-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    border-top: 1px solid rgba(255,255,255,0.06);
}
.tracker-card-footer .device-note {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    margin: 0;
}
.tracker-card-link {
    font-size: 0.85rem;
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s;
}
.tracker-card-link:hover {
    color: var(--color-heading);
}

/* Tall data card (fills column height) */
.data-card-tall {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
}
.data-card-body {
    flex: 1;
}
.data-card-body h3 {
    font-size: 1rem;
    color: var(--color-heading);
    margin: 0.75rem 0 0.3rem;
}
.data-card-body h3:first-of-type {
    margin-top: 0;
}
.data-thumb-full {
    max-width: 200px;
    height: auto;
    border-radius: 6px;
    border: 1px solid rgba(255,255,255,0.1);
    margin-top: 0.5rem;
}
.data-thumb-wide {
    width: 100%;
    height: 80px;
    object-fit: cover;
    object-position: top;
    border-radius: 6px;
    border: 1px solid rgba(255,255,255,0.1);
    margin-top: 0.5rem;
}
.data-card-thumbs {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 0.25rem;
}
.data-thumb {
    width: 50%;
    height: 120px;
    object-fit: cover;
    object-position: top;
    border-radius: 6px;
    border: 1px solid rgba(255,255,255,0.1);
}
.data-card-body p {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    margin: 0;
    line-height: 1.5;
}
.data-card-body p + img + p {
    margin-top: 1.2rem;
}
.data-card-tall .data-card-arrow {
    display: block;
    text-align: right;
    font-size: 0.95rem;
    margin-top: 1rem;
}

/* Sketch card – horizontal feature card */
.sketch-card {
    display: flex;
    gap: 1.5rem;
    text-decoration: none;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px;
    overflow: hidden;
    transition: border-color 0.25s, transform 0.2s;
}
.sketch-card:hover {
    border-color: rgba(99,102,241,0.4);
    transform: translateY(-2px);
}
.sketch-card-image {
    flex: 0 0 200px;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
}
.sketch-card-image img {
    width: 100%;
    height: auto;
    object-fit: contain;
}
.sketch-card-text {
    flex: 1;
    padding: 1.25rem 1.5rem 1.25rem 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.sketch-card-text h2 {
    font-size: 1.15rem;
    color: var(--color-heading);
    margin: 0 0 0.5rem;
}
.sketch-card-text p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin: 0 0 0.75rem;
    line-height: 1.55;
}
.sketch-card-link {
    font-size: 0.88rem;
    color: var(--color-accent);
    transition: color 0.2s;
}
.sketch-card:hover .sketch-card-link {
    color: var(--color-heading);
}
@media (max-width: 600px) {
    .sketch-card { flex-direction: column; gap: 0; }
    .sketch-card-image { flex: none; height: 160px; }
    .sketch-card-image img { height: 100%; object-fit: cover; }
    .sketch-card-text { padding: 1rem; }
}