/* ==========================================================================
   TechMolen — Design Tokens
   Concept: "Molen" (mill) rendered as technical blueprint — Dutch heritage
   drawn with the precision of engineering schematics.
   ========================================================================== */
:root {
    /* Color */
    --delft: #1B4B66;          /* Windmill-blade blue — primary */
    --delft-deep: #10303F;     /* Deep blue — dark sections, footer */
    --linen: #FAF6EC;          /* Tile-white — light backgrounds */
    --paper: #FFFFFF;          /* Pure white — cards */
    --ochre: #C4863A;          /* Sail / brick accent — CTAs, highlights */
    --ochre-deep: #A66E2C;
    --ink: #22262A;            /* Charcoal — body text */
    --slate: #5C6B72;          /* Secondary text */
    --blueprint-line: #2E6485; /* Grid lines on dark bg */
    --tile-border: #DDD3BE;    /* Hairline border on light bg */

    /* Type */
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-serif: 'Source Serif 4', Georgia, serif;
    --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

    /* Shadow / motion */
    --shadow-sm: 0 1px 2px 0 rgba(16, 48, 63, 0.06);
    --shadow-md: 0 8px 24px -8px rgba(16, 48, 63, 0.18);
    --shadow-lg: 0 20px 40px -12px rgba(16, 48, 63, 0.28);
    --transition: all 0.25s ease;
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--ink);
    background-color: var(--paper);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3 {
    font-family: var(--font-display);
}

/* Eyebrow / mono labels */
.eyebrow {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    color: var(--ochre-deep);
    margin-bottom: 0.9rem;
}

.eyebrow-center {
    text-align: center;
}

.eyebrow-light {
    color: var(--ochre);
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
    background-color: rgba(250, 246, 236, 0.92);
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.9rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--delft);
    text-decoration: none;
}

.logo-mark {
    width: 26px;
    height: 26px;
    color: var(--ochre);
    flex-shrink: 0;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--ink);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

.nav-menu a:hover {
    color: var(--ochre-deep);
}

.nav-menu a.nav-cta {
    color: var(--delft);
    font-weight: 600;
    border: 1.5px solid var(--delft);
    padding: 0.4rem 1rem;
    border-radius: 999px;
}

.nav-menu a.nav-cta:hover {
    background-color: var(--delft);
    color: var(--linen);
}

.lang-toggle {
    background-color: transparent;
    color: var(--delft);
    border: 1.5px solid var(--tile-border);
    padding: 0.4rem 0.9rem;
    border-radius: 6px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 0.85rem;
    transition: var(--transition);
}

.lang-toggle:hover {
    border-color: var(--ochre);
    color: var(--ochre-deep);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--ink);
    border-radius: 2px;
}

/* ==========================================================================
   Hero — Blueprint schematic of a windmill
   ========================================================================== */
.hero {
    position: relative;
    padding: 150px 0 90px;
    background: var(--delft);
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--blueprint-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--blueprint-line) 1px, transparent 1px);
    background-size: 44px 44px;
    opacity: 0.22;
    pointer-events: none;
}

.hero-inner {
    position: relative;
    display: flex;
    flex-direction: column-reverse;
    gap: 2.5rem;
    align-items: center;
}

.hero-content {
    text-align: center;
}

.hero .eyebrow {
    color: var(--ochre);
}

.hero-content h1 {
    font-size: 2.1rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    color: var(--linen);
    line-height: 1.25;
    letter-spacing: -0.01em;
}

.hero-lead {
    font-size: 1.05rem;
    color: #C9D9E1;
    margin-bottom: 2rem;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-visual {
    width: 100%;
    max-width: 320px;
}

.windmill-schematic {
    width: 100%;
    height: auto;
    overflow: visible;
}

.windmill-schematic .ring {
    fill: none;
    stroke: var(--blueprint-line);
    stroke-width: 1;
    stroke-dasharray: 4 5;
}

.windmill-schematic .tick-marks line {
    stroke: var(--blueprint-line);
    stroke-width: 1;
}

.windmill-schematic .blades {
    animation: rotate-blades 22s linear infinite;
}

@keyframes rotate-blades {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.windmill-schematic .blade {
    fill: rgba(196, 134, 58, 0.14);
    stroke: var(--ochre);
    stroke-width: 1.5;
}

.windmill-schematic .hub {
    fill: var(--linen);
    stroke: var(--ochre);
    stroke-width: 1.5;
}

.windmill-schematic .tower {
    fill: rgba(250, 246, 236, 0.08);
    stroke: var(--linen);
    stroke-width: 1.2;
}

.windmill-schematic .tower-line {
    stroke: var(--linen);
    stroke-width: 1.2;
}

.windmill-schematic .measure-line {
    stroke: #6E8FA0;
    stroke-width: 1;
}

.windmill-schematic .measure-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    fill: #6E8FA0;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-block;
    padding: 0.85rem 1.9rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--ochre);
    color: var(--delft-deep);
}

.btn-primary:hover {
    background-color: #D6954A;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-ghost {
    background-color: transparent;
    color: var(--linen);
    border: 1.5px solid rgba(250, 246, 236, 0.4);
}

.btn-ghost:hover {
    border-color: var(--linen);
    background-color: rgba(250, 246, 236, 0.08);
}

.btn-link {
    color: var(--delft);
    padding: 0.5rem 0;
    font-weight: 600;
}

.btn-link span {
    display: inline-block;
    transition: var(--transition);
}

.btn-link:hover span {
    transform: translateX(4px);
}

.btn-link:hover {
    color: var(--ochre-deep);
}

.btn-large {
    font-size: 1.1rem;
    padding: 1rem 2.5rem;
}

/* ==========================================================================
   Section Styles
   ========================================================================== */
section {
    padding: 72px 0;
}

.section-title {
    font-size: 1.75rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--ink);
    letter-spacing: -0.01em;
}

.section-title-left {
    text-align: left;
    margin-bottom: 0;
}

.section-title-light {
    color: var(--linen);
}

/* Services */
.services {
    background-color: var(--paper);
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.75rem;
}

.service-card {
    position: relative;
    background-color: var(--linen);
    padding: 2.25rem 2rem;
    border-radius: 4px;
    text-align: left;
    transition: var(--transition);
    border: 1px solid var(--tile-border);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--ochre);
}

.tile-corner {
    position: absolute;
    top: 10px;
    left: 10px;
    width: 14px;
    height: 14px;
    border-top: 2px solid var(--ochre);
    border-left: 2px solid var(--ochre);
    opacity: 0.7;
}

.service-icon {
    width: 44px;
    height: 44px;
    color: var(--delft);
    margin-bottom: 1.25rem;
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--ink);
}

.service-card p {
    color: var(--slate);
    font-size: 0.95rem;
}

/* About */
.about {
    background-color: var(--linen);
    border-top: 1px solid var(--tile-border);
    border-bottom: 1px solid var(--tile-border);
}

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

.about-body p {
    font-size: 1.05rem;
    color: var(--slate);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-body p:first-child {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.2rem;
    color: var(--ink);
}

/* Portfolio */
.portfolio {
    background-color: var(--paper);
}

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

.portfolio-card {
    background-color: var(--paper);
    border-radius: 6px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--tile-border);
}

.portfolio-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--ochre);
}

.portfolio-image {
    width: 100%;
    overflow: hidden;
    background-color: var(--linen);
    aspect-ratio: 2.14 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--tile-border);
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
    object-position: center;
    filter: grayscale(45%);
    transition: filter 0.35s ease;
}

.portfolio-card:hover .portfolio-image img {
    filter: grayscale(0%);
}

.portfolio-content {
    padding: 1.5rem;
}

.portfolio-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    color: var(--ochre-deep);
    margin-bottom: 0.6rem;
}

.portfolio-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
    color: var(--ink);
}

.portfolio-content p {
    color: var(--slate);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

/* Testimonials */
.testimonials {
    background-color: var(--linen);
    border-top: 1px solid var(--tile-border);
    border-bottom: 1px solid var(--tile-border);
}

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

.testimonial-card {
    position: relative;
    background-color: var(--paper);
    padding: 2.25rem 2rem 2rem;
    border-radius: 6px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--tile-border);
}

.quote-mark {
    position: absolute;
    top: 0.5rem;
    left: 1.5rem;
    font-family: var(--font-serif);
    font-size: 3.5rem;
    color: var(--ochre);
    opacity: 0.35;
    line-height: 1;
}

.testimonial-content p {
    font-family: var(--font-serif);
    font-size: 1.08rem;
    color: var(--ink);
    font-style: italic;
    margin-bottom: 1.5rem;
    line-height: 1.75;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
}

.testimonial-author strong {
    color: var(--ink);
    font-size: 0.98rem;
}

.testimonial-author span {
    color: var(--slate);
    font-size: 0.85rem;
    font-family: var(--font-mono);
}

/* Contact */
.contact {
    position: relative;
    background-color: var(--delft-deep);
    text-align: center;
    overflow: hidden;
}

.contact .container {
    position: relative;
}

.contact-content {
    max-width: 560px;
    margin: 0 auto;
}

.contact-content p {
    font-size: 1.05rem;
    color: #C9D9E1;
    margin-bottom: 2rem;
}

/* Footer */
.footer {
    background-color: var(--delft-deep);
    color: var(--linen);
    padding: 1.75rem 0;
    border-top: 1px solid rgba(250, 246, 236, 0.12);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-brand .logo-mark {
    color: var(--ochre);
}

.footer-brand .logo {
    color: var(--linen);
    font-family: var(--font-display);
    font-weight: 700;
}

.footer-copyright p {
    color: #8FA6AF;
    font-size: 0.85rem;
}

/* ==========================================================================
   Responsive — Tablet
   ========================================================================== */
@media (min-width: 768px) {
    .hero-content h1 {
        font-size: 2.75rem;
    }

    .hero-inner {
        flex-direction: row;
        text-align: left;
        align-items: center;
    }

    .hero-content {
        text-align: left;
        flex: 1.1;
    }

    .hero-lead {
        margin-left: 0;
    }

    .hero-actions {
        justify-content: flex-start;
    }

    .hero-visual {
        flex: 1;
        max-width: 380px;
    }

    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .about-grid {
        grid-template-columns: 0.8fr 1.2fr;
        gap: 3.5rem;
    }

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

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

/* ==========================================================================
   Responsive — Desktop
   ========================================================================== */
@media (min-width: 1024px) {
    .portfolio-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .hero-content h1 {
        font-size: 3.1rem;
    }
}

/* ==========================================================================
   Mobile Menu
   ========================================================================== */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 66px;
        left: 0;
        right: 0;
        background-color: var(--linen);
        flex-direction: column;
        align-items: flex-start;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        transition: var(--transition);
        z-index: 999;
        gap: 1.25rem;
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-actions {
        gap: 0.5rem;
    }

    .hero {
        padding: 115px 0 70px;
    }

    section {
        padding: 56px 0;
    }
}

/* Keyboard focus visibility */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--ochre);
    outline-offset: 3px;
}