/* =============================================================================
   Arx Engineering — institutional / regulatory aesthetic
   Inspired by CV voice: clarity, alignment, governance, quantitative rigor.
   Cool neutrals + slate + black. No warm paper, mint, teal cheer, orange, gold.
   ============================================================================= */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,500;0,8..60,600;0,8..60,700;1,8..60,400&display=swap');

:root {
    /* Cool light surfaces — concrete / filing cabinet, not cream */
    --surface: #e4e7ec;
    --surface-raised: #eef0f4;
    --surface-card: #f7f8fa;
    --white: #ffffff;
    /* Typography ink */
    --ink: #0a0b0d;
    --ink-body: #3c4452;
    --ink-muted: #5c6575;
    --ink-faint: #7c8494;
    /* Structure — cold slate only */
    --slate: #334155;
    --slate-deep: #1e293b;
    --slate-void: #0f172a;
    --rule: #c5cad3;
    --rule-strong: #9aa3b2;
    --focus: rgba(15, 23, 42, 0.14);
    --focus-ring: rgba(30, 41, 59, 0.22);
    /* Legacy / Tailwind bridge (same family, no hue pop) */
    --navy: #1e293b;
    --navy-dark: #0f172a;
    --blue: #1e293b;
    --blue-dark: #0f172a;
    --gray-light: #eef0f4;
    --gray-medium: #64748b;
    --gray-dark: #334155;
    --section-padding-y: 5rem;
    --section-padding-y-first: 6rem;
    --font-display: 'Source Serif 4', 'Times New Roman', serif;
    --font-sans: 'IBM Plex Sans', system-ui, sans-serif;
    --radius-sm: 2px;
    --radius-md: 2px;
    --nav-h: 4rem;
    --shadow-card: 0 1px 0 rgba(10, 11, 13, 0.06), 0 12px 40px -16px rgba(10, 11, 13, 0.12);
    --shadow-hover: 0 1px 0 rgba(10, 11, 13, 0.08), 0 20px 50px -18px rgba(10, 11, 13, 0.18);
}

html {
    scrollbar-gutter: stable;
    scroll-behavior: smooth;
}

body:has(#page-wrapper.page-wrapper) {
    height: 100vh;
    max-height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--ink-body);
    font-feature-settings: 'kern' 1, 'liga' 1, 'tnum' 1;
    background-color: var(--surface) !important;
    /* Technical grid: faint horizontal registration lines */
    background-image: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 7px,
        rgba(10, 11, 13, 0.025) 7px,
        rgba(10, 11, 13, 0.025) 8px
    );
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background: radial-gradient(ellipse 100% 80% at 50% 0%, rgba(247, 248, 250, 0.85), transparent 55%);
}

#page-wrapper,
nav#nav-main {
    position: relative;
    z-index: 1;
}

#nav-desktop {
    min-width: 6rem;
}

/* Nav — flat, authoritative */
#nav-main {
    background: rgba(247, 248, 250, 0.92) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--rule);
    box-shadow: none;
}

#nav-main::after {
    display: none;
}

#nav-main .border-t {
    border-color: var(--rule) !important;
}

#nav-main .bg-white,
#nav-mobile-menu .bg-white {
    background-color: var(--surface-card) !important;
}

nav .flex-shrink-0 a {
    font-family: var(--font-sans);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--ink);
    text-decoration: none;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

/* Wordmark: fixed stack; beats #nav-main a.text-navy and Tailwind utilities */
#nav-main #nav-logo > a {
    font-family: var(--font-sans) !important;
    font-size: 1.05rem !important;
    font-weight: 600 !important;
    letter-spacing: 0.06em !important;
    text-transform: uppercase !important;
    color: var(--ink) !important;
    text-decoration: none;
}

#nav-main #nav-logo > a:hover {
    color: var(--slate-deep) !important;
}

#nav-main a.text-gray-700,
#nav-main button.text-gray-700 {
    color: var(--ink-muted) !important;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    font-size: 0.7rem;
}

#nav-main a.text-navy {
    color: var(--ink) !important;
    font-weight: 600;
}

#nav-main a.text-gray-700:hover,
#nav-main a.text-navy:hover,
#nav-main button.text-gray-700:hover,
#nav-main a:hover {
    color: var(--slate-deep) !important;
}

#nav-main button.border-gray-300,
#nav-main .border-gray-300 {
    border-color: var(--rule) !important;
    color: var(--ink-body) !important;
    background: var(--white) !important;
    border-radius: var(--radius-sm) !important;
    text-transform: uppercase;
    font-size: 0.65rem;
    letter-spacing: 0.06em;
}

#nav-main button.border-gray-300:hover {
    border-color: var(--slate-deep) !important;
    color: var(--ink) !important;
    box-shadow: none;
}

#nav-main svg {
    stroke: var(--ink-body);
}

#nav-main button:hover svg {
    stroke: var(--ink);
}

.page-wrapper {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    padding-top: var(--nav-h);
}

.page-wrapper > .page-header {
    flex-shrink: 0;
}

.page-wrapper > .page-mid {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
}

.page-wrapper > footer {
    flex-shrink: 0;
}

.page-section {
    padding-top: var(--section-padding-y);
    padding-bottom: var(--section-padding-y);
}

.page-section--first {
    padding-top: var(--section-padding-y-first);
    padding-bottom: var(--section-padding-y);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    color: var(--ink);
    letter-spacing: -0.02em;
}

h1 {
    font-size: 2.85rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.35rem;
}

h4 {
    font-size: 1.1rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.85rem, 4.5vw, 2.65rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    text-transform: none;
    color: var(--ink);
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 1.25rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    max-width: 3rem;
    height: 2px;
    background: var(--ink);
}

.section-title.text-center::after {
    left: 50%;
    transform: translateX(-50%);
    max-width: 3.5rem;
}

/* Services — executive section header, no gradient */
#section-services {
    padding-top: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}

#section-services::before {
    display: none;
}

#section-services > * {
    position: relative;
    z-index: 1;
}

/* Primary page titles — index services + contact (same typography) */
#section-services h1.text-3xl,
#section-contact-form h1.text-3xl {
    font-family: var(--font-sans) !important;
    font-size: clamp(1.75rem, 3.5vw, 2.15rem) !important;
    font-weight: 600 !important;
    letter-spacing: 0.18em !important;
    text-transform: uppercase !important;
    line-height: 1.3 !important;
    margin-bottom: 2.5rem !important;
    color: var(--ink) !important;
    background: none !important;
    -webkit-text-fill-color: var(--ink) !important;
}

#section-services h1.text-3xl::after,
#section-contact-form h1.text-3xl::after {
    content: '';
    display: block;
    width: 2.5rem;
    height: 2px;
    margin: 1.5rem auto 0;
    background: var(--ink);
}

.services-lead {
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 400;
    line-height: 1.65;
    color: var(--ink-muted);
    letter-spacing: 0.01em;
}

/* Service blocks — report / annex panels */
.service-card {
    background: var(--white) !important;
    border: 1px solid var(--rule) !important;
    border-radius: 0 !important;
    clip-path: none !important;
    box-shadow: var(--shadow-card);
    transition: border-color 0.2s ease, box-shadow 0.25s ease, transform 0.25s ease;
    position: relative;
}

.service-card::before {
    display: none;
}

.service-card:hover {
    border-color: var(--slate-deep) !important;
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.service-card h3,
#container-contact-info h3 {
    color: var(--ink) !important;
    font-size: 1.15rem !important;
    font-family: var(--font-sans) !important;
    font-weight: 600 !important;
    letter-spacing: 0.02em;
}

.service-card .text-gray-700 {
    color: var(--ink-body) !important;
}

/* Contact — body copy; primary title is h1.text-3xl (matches index) */

#container-contact-info .text-gray-700,
#section-contact-form label.text-gray-700 {
    color: var(--ink-muted) !important;
    font-weight: 500;
    font-size: 0.8rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

#container-contact-info p.text-gray-700,
#container-contact-info .text-gray-700.space-y-1 {
    color: var(--ink-body) !important;
    text-transform: none;
    letter-spacing: normal;
    font-size: 1rem;
}

#form-contact input,
#form-contact textarea,
#form-contact select {
    background: var(--white) !important;
    border: 1px solid var(--rule) !important;
    color: var(--ink) !important;
    border-radius: var(--radius-md) !important;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

#form-contact input::placeholder,
#form-contact textarea::placeholder {
    color: var(--ink-faint);
}

#form-contact input:focus,
#form-contact textarea:focus,
#form-contact select:focus {
    outline: none;
    border-color: var(--slate-deep) !important;
    box-shadow: 0 0 0 3px var(--focus-ring);
    --tw-ring-color: transparent;
}

#contact-sent-message {
    background: var(--surface-raised) !important;
    border: 1px solid var(--rule-strong) !important;
    color: var(--slate-deep) !important;
    border-radius: var(--radius-md) !important;
}

/* About */
#page-about-header {
    padding-top: 8rem;
    padding-bottom: 4rem;
    border-bottom: 1px solid var(--rule);
    background: var(--surface-card);
}

#page-about-header .text-gray-700 {
    color: var(--ink-muted) !important;
    font-weight: 400;
    font-size: 1.05rem;
    max-width: 36rem;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.65;
}

#section-company-overview,
#section-about-me {
    border-bottom: 1px solid var(--rule);
}

#section-company-overview {
    background: var(--surface-raised);
}

#section-about-me {
    background: var(--surface-card);
}

#section-company-overview .text-gray-700,
#section-about-me .text-gray-700 {
    color: var(--ink-body) !important;
}

#section-about-me strong.text-navy {
    color: var(--ink) !important;
    font-weight: 600;
}

/* CTA — sober band */
#section-cta {
    background: var(--surface) !important;
    border-top: 2px solid var(--slate-void) !important;
    position: relative;
    overflow: hidden;
}

#section-cta::before {
    display: none;
}

#section-cta .max-w-3xl {
    position: relative;
    z-index: 1;
}

#section-cta h2.text-white {
    color: var(--ink) !important;
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3.5vw, 2rem);
    font-weight: 600;
    letter-spacing: -0.02em;
}

#section-cta .text-gray-300 {
    color: var(--ink-muted) !important;
}

#section-cta a.bg-white {
    background: var(--ink) !important;
    color: var(--white) !important;
    border: 1px solid var(--ink) !important;
    border-radius: var(--radius-sm) !important;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-size: 0.68rem;
    font-weight: 600;
    font-family: var(--font-sans);
    box-shadow: none;
}

#section-cta a.bg-white:hover {
    background: var(--slate-void) !important;
    border-color: var(--slate-void) !important;
    color: var(--white) !important;
    transform: none;
    box-shadow: var(--shadow-card);
}

#section-about-preview {
    background-color: var(--surface-raised);
    color: var(--ink);
}

#section-about-preview .about-preview-tagline {
    color: var(--ink-muted);
}

#page-contact-header,
#page-index-header {
    background: var(--surface-card);
    color: var(--ink);
    min-height: 4rem;
    border-bottom: 1px solid var(--rule);
}

#page-contact-header h1,
#page-index-header h1 {
    color: var(--ink);
}

.text-navy {
    color: var(--slate-deep) !important;
}

.bg-navy {
    background-color: var(--ink) !important;
    border: 1px solid var(--ink) !important;
}

.border-navy {
    border-color: var(--slate-deep) !important;
}

/* Primary actions — black, no chroma */
a.inline-flex.bg-navy,
button.bg-navy,
a.bg-navy {
    background: var(--ink) !important;
    border: 1px solid var(--ink) !important;
    color: var(--white) !important;
    border-radius: var(--radius-sm) !important;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-size: 0.68rem !important;
    font-weight: 600 !important;
    font-family: var(--font-sans) !important;
    box-shadow: var(--shadow-card);
    clip-path: none !important;
}

a.inline-flex.bg-navy:hover,
button.bg-navy:hover,
a.bg-navy:hover {
    background: var(--slate-void) !important;
    border-color: var(--slate-void) !important;
    color: var(--white) !important;
    box-shadow: var(--shadow-hover);
    transform: translateY(-1px);
}

a.inline-flex .text-white {
    color: inherit !important;
}

body.text-gray-900 {
    color: var(--ink-body) !important;
}

.text-gray-900 {
    color: var(--ink) !important;
}

/* Footer — cool void */
#footer-main {
    background: var(--slate-void) !important;
    border-top: 1px solid #1e293b;
    color: #94a3b8;
}

#footer-main h3,
#footer-main h4 {
    color: #f1f5f9 !important;
    font-family: var(--font-sans);
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-size: 0.75rem;
}

#footer-main .text-gray-300,
#footer-main .text-gray-400 {
    color: #94a3b8 !important;
}

#footer-main a {
    color: #cbd5e1 !important;
}

#footer-main a:hover {
    color: #f8fafc !important;
}

#footer-main .border-gray-700,
#footer-main .border-gray-800 {
    border-color: rgba(148, 163, 184, 0.2) !important;
}

#footer-main .text-blue-300 {
    color: #e2e8f0 !important;
}

nav {
    transition: border-color 0.2s ease;
}

nav a,
footer a,
button,
a[class*='bg-'] {
    transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--slate-deep);
    outline-offset: 2px;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--surface);
}

::-webkit-scrollbar-thumb {
    background: var(--rule-strong);
    border-radius: 0;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--slate);
}

::selection {
    background: #cbd5e1;
    color: var(--ink);
}

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

section {
    scroll-margin-top: 80px;
}

#mobile-menu {
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

@media (max-width: 1024px) {
    :root {
        --section-padding-y: 2rem;
        --section-padding-y-first: 2rem;
    }

    h1 {
        font-size: 2.2rem;
    }

    h2 {
        font-size: 1.65rem;
    }

    h3 {
        font-size: 1.15rem;
    }

    #section-services {
        justify-content: flex-start;
    }

    #page-index-header,
    #page-contact-header {
        padding-top: 2rem !important;
        padding-bottom: 1.5rem !important;
        min-height: 2rem !important;
    }

    #footer-main {
        padding-top: 1rem !important;
        padding-bottom: 1rem !important;
        padding-left: 1rem !important;
        padding-right: 1rem !important;
    }

    #footer-main #container-footer {
        max-width: 100%;
        padding: 0;
    }

    #footer-main #container-footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }

    #footer-main #footer-company-info {
        grid-column: 1 / -1;
    }

    #footer-main #footer-copyright {
        margin-top: 1rem;
        padding-top: 1rem;
    }

    #footer-main h3 {
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }

    #footer-main h4 {
        font-size: 0.875rem;
        margin-bottom: 0.5rem;
    }

    #footer-main p,
    #footer-main li,
    #footer-main a {
        font-size: 0.8125rem;
    }

    #footer-main #footer-copyright p {
        font-size: 0.75rem;
    }

    #footer-main p {
        margin-bottom: 0.25rem;
    }

    #footer-main .space-y-1 p {
        margin-bottom: 0.125rem;
    }
}

@media print {
    nav,
    footer {
        display: none;
    }

    body {
        color: #000;
        background: #fff !important;
    }

    body::before {
        display: none;
    }
}