/* ============================================
   TechVault — Layout
   ============================================ */

/* ---- Header / Navigation ---- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    padding: var(--space-4) 0;
    transition: all var(--transition-base);
}

.site-header--scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--space-3) 0;
}

.site-header--scrolled .nav__logo-text,
.site-header--scrolled .nav__link {
    color: var(--color-gray-800);
}

.site-header--scrolled .logo-bg {
    color: var(--color-accent);
}

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

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-xl);
    font-weight: 800;
    letter-spacing: var(--tracking-tight);
    color: var(--color-on-dark);
    z-index: calc(var(--z-overlay) + 1);
}

.nav__logo-icon {
    display: flex;
}

.logo-bg {
    color: var(--color-accent-light);
    transition: color var(--transition-base);
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav__link {
    font-size: var(--text-sm);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.75);
    transition: color var(--transition-fast);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link--active {
    color: var(--color-on-dark);
}

.site-header--scrolled .nav__link:hover,
.site-header--scrolled .nav__link--active {
    color: var(--color-accent);
}

.nav__link:hover::after,
.nav__link--active::after {
    width: 100%;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    z-index: calc(var(--z-overlay) + 1);
    padding: var(--space-2);
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: currentColor;
    color: var(--color-on-dark);
    transition: all var(--transition-base);
    border-radius: 1px;
}

.site-header--scrolled .nav__toggle span {
    color: var(--color-gray-800);
}

.nav__cta {
    color: var(--color-on-dark) !important;
}

/* ---- Sections ---- */
.section {
    padding: var(--space-24) 0;
}

.section--dark {
    background: var(--color-primary);
    color: var(--color-on-dark);
}

.section--dark .section__title {
    color: var(--color-on-dark);
}

.section--dark .section__desc {
    color: var(--color-gray-400);
}

.section--light {
    background: var(--color-gray-50);
}

.section__header {
    margin-bottom: var(--space-16);
}

.section__header--center {
    text-align: center;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.section__title {
    font-size: var(--text-4xl);
    font-weight: 800;
    margin-bottom: var(--space-4);
}

.section__desc {
    font-size: var(--text-lg);
    color: var(--color-gray-500);
    line-height: var(--leading-relaxed);
}

.section__cta {
    text-align: center;
    margin-top: var(--space-12);
}

/* ---- Hero ---- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--color-primary);
    overflow: hidden;
    padding: var(--space-32) 0 var(--space-20);
}

.hero__bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    background-image: url('../assets/hero-bg.jpg');
    background-size: cover;
    background-position: center right;
    background-repeat: no-repeat;
}

/* Scrim over the artwork — the headline sits on the left, so the wash is
   heaviest there and clears toward the shield on the right. */
.hero__bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg,
            rgba(10, 15, 30, 0.96) 0%,
            rgba(10, 15, 30, 0.90) 38%,
            rgba(10, 15, 30, 0.60) 68%,
            rgba(10, 15, 30, 0.38) 100%),
        linear-gradient(180deg,
            rgba(10, 15, 30, 0.55) 0%,
            transparent 35%,
            rgba(10, 15, 30, 0.65) 100%);
}

.hero__grid-lines {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero__gradient {
    position: absolute;
    top: -40%;
    right: -20%;
    width: 80%;
    height: 120%;
    background: radial-gradient(ellipse, rgba(59, 130, 246, 0.08) 0%, transparent 60%);
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
    color: var(--color-accent-light);
    background: var(--color-accent-subtle);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-8);
}

.hero__badge-dot {
    width: 6px;
    height: 6px;
    background: var(--color-accent-light);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero__title {
    font-size: var(--text-6xl);
    font-weight: 900;
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-tight);
    color: var(--color-on-dark);
    margin-bottom: var(--space-6);
}

.hero__title-accent {
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero__subtitle {
    font-size: var(--text-xl);
    line-height: var(--leading-relaxed);
    color: var(--color-gray-400);
    margin-bottom: var(--space-10);
    max-width: 640px;
}

.hero__actions {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-16);
    flex-wrap: wrap;
}

.hero__proof {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.hero__proof-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.hero__proof-number {
    font-size: var(--text-base);
    font-weight: 800;
    color: var(--color-on-dark);
    letter-spacing: var(--tracking-tight);
}

.hero__proof-label {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
    letter-spacing: var(--tracking-wide);
}

.hero__proof-divider {
    width: 1px;
    height: 32px;
    background: rgba(255, 255, 255, 0.1);
}

/* ---- Pillars Grid ---- */
.pillars {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-1);
}

/* ---- Services Grid ---- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

/* ---- Flagship Section ----
   Only the ≤1024px override existed, so this two-column layout was collapsing
   to a stack at every width. */
.flagship__layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

/* ---- Selected Work Grid ---- */
.work-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
}

/* ---- Process Grid ---- */
.process {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
}

/* ---- CTA Block ---- */
.cta-section {
    background: var(--color-primary);
    padding: var(--space-20) 0;
}

.cta-block {
    background: linear-gradient(135deg, var(--color-accent-dark) 0%, var(--color-accent) 50%, #818CF8 100%);
    border-radius: var(--radius-2xl);
    padding: var(--space-16) var(--space-12);
    text-align: center;
}

.cta-block__title {
    font-size: var(--text-4xl);
    font-weight: 800;
    color: var(--color-on-dark);
    margin-bottom: var(--space-4);
}

.cta-block__desc {
    font-size: var(--text-lg);
    color: rgba(255, 255, 255, 0.85);
    max-width: 560px;
    margin: 0 auto var(--space-8);
    line-height: var(--leading-relaxed);
}

.cta-block__actions {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

/* ---- Footer ---- */
.footer {
    background: var(--color-primary);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: var(--space-16) 0 var(--space-8);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-xl);
    font-weight: 800;
    color: var(--color-on-dark);
    margin-bottom: var(--space-4);
}

.footer__tagline {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    line-height: var(--leading-relaxed);
    max-width: 300px;
}

.footer__contact {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-top: var(--space-5);
    list-style: none;
    font-size: var(--text-sm);
    color: var(--color-gray-400);
}

.footer__contact a {
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer__contact a:hover {
    color: var(--color-accent-light);
}

.footer__heading {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-on-dark);
    margin-bottom: var(--space-5);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
}

.footer__links ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer__links a {
    font-size: var(--text-sm);
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer__links a:hover {
    color: var(--color-accent-light);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer__bottom p {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
}

.footer__bottom-links {
    display: flex;
    gap: var(--space-6);
}

.footer__bottom-links a {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    transition: color var(--transition-fast);
}

.footer__bottom-links a:hover {
    color: var(--color-gray-300);
}