/* ==========================================================================
   Tingdahl IT Management - Official Stylesheet
   Executive Light Theme (Inspired by tingdahl.it with Nordic Blue Accents)
   Modern, zero-JS, responsive, privacy-focused design system.
   ========================================================================== */

:root {
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

    /* Theme colors - Professional Light Theme default */
    --bg-base: #f8fafc;
    --bg-surface-1: #ffffff;
    --bg-surface-2: #f1f5f9;
    --bg-surface-3: #e2e8f0;
    --border-subtle: #e2e8f0;
    --border-hover: #0284c7;

    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;

    /* Nordic Blue Accents (Replacing yellow from legacy site) */
    --accent-primary: #0284c7;
    --accent-hover: #0369a1;
    --accent-sky: #0284c7;
    --accent-gradient: linear-gradient(135deg, #0284c7 0%, #2563eb 50%, #4f46e5 100%);

    --badge-saas-bg: #e0f2fe;
    --badge-saas-text: #0369a1;
    --badge-saas-border: #bae6fd;

    --badge-oss-bg: #ecfdf5;
    --badge-oss-text: #047857;
    --badge-oss-border: #a7f3d0;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.05), 0 4px 12px rgba(15, 23, 42, 0.03);
    --shadow-hover: 0 10px 25px -5px rgba(2, 132, 199, 0.12), 0 8px 10px -6px rgba(2, 132, 199, 0.08);
    --transition-fast: 0.15s ease;
    --transition-smooth: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.65;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header & Navigation */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--border-subtle);
    transition: background var(--transition-fast);
}

.header-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0.875rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: -0.02em;
}

.brand-logo {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: block;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    padding: 0.375rem 0.625rem;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover, .nav-link:focus-visible {
    color: var(--accent-primary);
    background-color: var(--bg-surface-2);
}

.nav-cta {
    background-color: var(--text-primary);
    color: #ffffff;
    border: 1px solid transparent;
}

.nav-cta:hover, .nav-cta:focus-visible {
    background-color: var(--accent-primary);
    color: #ffffff;
    border-color: transparent;
}

/* Main Content Layout */
.main-content {
    flex: 1;
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
    padding: 2.5rem 1.25rem 4rem;
}

/* Hero Section - Option B (Panoramic Header with Gradient Scrim) */
.hero-section {
    padding: 2.5rem 0 3.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.hero-section.hero-panoramic {
    position: relative;
    padding: 3.5rem 2.5rem;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-card);
    background-color: var(--bg-surface-1);
    margin-bottom: 2.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.hero-bg-wrapper {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

.hero-scrim {
    position: absolute;
    inset: 0;
    /* Soft directional white scrim allowing the horizon to breathe while keeping text sharp */
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.96) 0%,
        rgba(255, 255, 255, 0.90) 50%,
        rgba(255, 255, 255, 0.60) 80%,
        rgba(255, 255, 255, 0.35) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 680px;
}

@media (max-width: 767px) {
    .hero-section.hero-panoramic {
        padding: 2.25rem 1.25rem;
        border-radius: var(--radius-md);
        margin-bottom: 1.5rem;
    }

    .hero-scrim {
        background: rgba(255, 255, 255, 0.92);
    }
}

.hero-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.85rem;
    background: #f0f9ff;
    border: 1px solid #bae6fd;
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.18;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.hero-gradient {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1875rem;
    color: var(--text-secondary);
    max-width: 52ch;
    line-height: 1.6;
    margin-bottom: 1.75rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.875rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    min-height: 44px;
}

.btn-primary {
    background: var(--text-primary);
    color: #ffffff;
    border: 1px solid transparent;
}

.btn-primary:hover, .btn-primary:focus-visible {
    background: var(--accent-primary);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-surface-1);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

.btn-secondary:hover, .btn-secondary:focus-visible {
    border-color: var(--border-hover);
    color: var(--accent-primary);
    background: #f0f9ff;
    transform: translateY(-1px);
}

/* Content Sections */
.section {
    padding: 3.5rem 0;
    border-bottom: 1px solid var(--border-subtle);
}

.section-header {
    margin-bottom: 2rem;
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.section-description {
    font-size: 1rem;
    color: var(--text-muted);
}

/* About Prose */
.about-prose {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.75;
    max-width: 75ch;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.about-prose p {
    margin-bottom: 0;
}

.about-prose a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 1px solid rgba(2, 132, 199, 0.3);
    transition: border-color var(--transition-fast);
}

.about-prose a:hover, .about-prose a:focus-visible {
    border-color: var(--accent-primary);
}

.about-callout {
    margin-top: 1.5rem;
    padding: 1.25rem 1.5rem;
    background: var(--bg-surface-1);
    border: 1px solid var(--border-subtle);
    border-left: 3px solid var(--accent-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    box-shadow: var(--shadow-card);
}

.callout-text {
    font-size: 0.9375rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* Portfolio & Projects Subsections & Grids */
.anchor-alias {
    display: block;
    position: relative;
    top: -80px;
    visibility: hidden;
    height: 0;
}

.portfolio-category {
    margin-bottom: 3rem;
}

.portfolio-category:last-child {
    margin-bottom: 0;
}

.category-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.category-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.55rem;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.badge-commercial {
    background: var(--badge-saas-bg);
    color: var(--badge-saas-text);
    border: 1px solid var(--badge-saas-border);
}

.badge-opensource {
    background: var(--badge-oss-bg);
    color: var(--badge-oss-text);
    border: 1px solid var(--badge-oss-border);
}

.card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
}

@media (min-width: 768px) {
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.project-card {
    background: var(--bg-surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
    box-shadow: var(--shadow-card);
}

.project-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.project-title {
    font-size: 1.1875rem;
    font-weight: 700;
    line-height: 1.3;
}

.project-link {
    color: var(--text-primary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    transition: color var(--transition-fast);
}

.project-link:hover, .project-link:focus-visible {
    color: var(--accent-primary);
}

.external-icon {
    width: 14px;
    height: 14px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
    opacity: 0.6;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.project-card:hover .external-icon {
    opacity: 1;
    transform: translate(2px, -2px);
}

.project-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
    margin-bottom: 1.25rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: auto;
}

.tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    background: var(--bg-surface-2);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
}

/* Contact & Info Grid */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.info-card {
    background: var(--bg-surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    box-shadow: var(--shadow-card);
}

.info-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.info-item {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.5rem;
    font-size: 0.9375rem;
    padding-bottom: 0.625rem;
    border-bottom: 1px solid var(--border-subtle);
}

.info-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.info-label {
    color: var(--text-muted);
    font-weight: 500;
}

.info-value {
    color: var(--text-primary);
    font-weight: 600;
    text-align: right;
}

.info-value a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.info-value a:hover, .info-value a:focus-visible {
    text-decoration: underline;
}

/* Footer */
.site-footer {
    background: var(--bg-surface-1);
    border-top: 1px solid var(--border-subtle);
    padding: 2.5rem 1.25rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-container {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
    text-align: center;
}

@media (min-width: 768px) {
    .footer-container {
        flex-direction: row;
        text-align: left;
    }
}

.footer-legal {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    list-style: none;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover, .footer-link:focus-visible {
    color: var(--accent-primary);
}

/* Digital Business Card (card.html) */
.card-main {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 180px);
    padding: 3rem 1.25rem 4.5rem;
}

.bcard-wrapper {
    width: 100%;
    max-width: 840px;
}

.bcard {
    background: var(--bg-surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 20px 25px -5px rgba(15, 23, 42, 0.06);
    overflow: hidden;
    position: relative;
    transition: box-shadow var(--transition-smooth);
}

.bcard::before {
    content: "";
    display: block;
    height: 4px;
    background: var(--accent-gradient);
    width: 100%;
}

.bcard-body {
    padding: 2.75rem 2.5rem;
}

.bcard-header {
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 1.75rem;
    margin-bottom: 2rem;
}

.bcard-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.85rem;
    background: #f0f9ff;
    border: 1px solid #bae6fd;
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.bcard-name {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.025em;
    color: var(--text-primary);
    margin-bottom: 0.35rem;
}

.bcard-degree {
    font-weight: 700;
    color: var(--accent-primary);
}

.bcard-company {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.bcard-role {
    font-size: 0.9375rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.bcard-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .bcard-grid {
        grid-template-columns: 1fr 260px;
        align-items: start;
    }
}

.bcard-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.bcard-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.875rem;
}

.bcard-action-btn {
    flex: 1 1 auto;
    justify-content: center;
}

.bcard-info-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.bcard-info-item {
    display: flex;
    gap: 0.875rem;
    align-items: flex-start;
    font-size: 0.9375rem;
}

.bcard-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 0.2rem;
    color: var(--accent-primary);
}

.bcard-info-content {
    display: flex;
    flex-direction: column;
}

.bcard-info-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 0.15rem;
}

.bcard-info-val {
    color: var(--text-primary);
    font-weight: 500;
    line-height: 1.5;
}

.bcard-info-val a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.bcard-info-val a:hover,
.bcard-info-val a:focus-visible {
    color: var(--accent-primary);
    text-decoration: underline;
}

/* QR Code Section */
.bcard-qr-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--bg-surface-2);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.5rem 1.25rem;
    text-align: center;
    gap: 1rem;
}

.bcard-qr-box {
    width: 200px;
    height: 200px;
    background: #ffffff;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.75rem;
    position: relative;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.bcard-qr-box:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-hover);
}

.bcard-qr-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-sm);
    display: block;
}

.bcard-qr-icon {
    width: 44px;
    height: 44px;
    color: var(--accent-primary);
    opacity: 0.85;
}

.bcard-qr-placeholder-text {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.bcard-qr-placeholder-sub {
    font-size: 0.6875rem;
    color: var(--text-muted);
}

.bcard-qr-meta {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.bcard-qr-caption {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.bcard-qr-subtext {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.bcard-footer-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-subtle);
}

.bcard-back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.bcard-back-link:hover,
.bcard-back-link:focus-visible {
    color: var(--accent-primary);
}

/* Mobile responsive adjustments down to 360px */
@media (max-width: 767px) {
    .hero-title {
        font-size: 1.875rem;
    }

    .hero-subtitle {
        font-size: 1.0625rem;
    }

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

    .nav-links {
        gap: 0.5rem;
    }

    .nav-link {
        font-size: 0.875rem;
        padding: 0.35rem 0.5rem;
    }

    .header-container {
        padding: 0.75rem 1rem;
    }

    .main-content {
        padding: 1.5rem 1rem 3rem;
    }

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

    .info-value {
        text-align: left;
    }

    /* Business card mobile rules */
    .card-main {
        padding: 1.5rem 1rem 3rem;
    }

    .bcard-body {
        padding: 1.75rem 1.25rem;
    }

    .bcard-name {
        font-size: 1.75rem;
    }

    .bcard-company {
        font-size: 1.125rem;
    }

    .bcard-actions {
        flex-direction: column;
    }

    .bcard-action-btn {
        width: 100%;
    }

    .bcard-qr-section {
        padding: 1.25rem 1rem;
    }

    .bcard-qr-box {
        width: 180px;
        height: 180px;
    }
}