/* ═══════════════════════════════════════════════════════════════════
   Elite Core Systems — Main Stylesheet
   Design system built on CSS custom properties for easy theming.
   Swap the accent color by changing --color-accent alone.
═══════════════════════════════════════════════════════════════════ */

/* ─── Design Tokens ──────────────────────────────────────────────── */
:root {
    /* Colors */
    --color-bg:           #080C14;
    --color-bg-2:         #0D1525;
    --color-bg-3:         #111E35;
    --color-accent:       #2563EB;   /* Cobalt — swap here for Violet (#6C63FF) */
    --color-accent-light: #3B82F6;
    --color-accent-glow:  rgba(37, 99, 235, 0.15);
    --color-accent-border:rgba(37, 99, 235, 0.3);
    --color-platinum:     #CBD5E1;
    --color-text:         #F8FAFC;
    --color-text-muted:   #94A3B8;
    --color-text-subtle:  #64748B;
    --color-border:       rgba(255, 255, 255, 0.08);
    --color-border-strong:rgba(255, 255, 255, 0.15);

    /* Typography */
    --font-body:    'Inter', system-ui, -apple-system, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;

    /* Spacing */
    --space-1:  0.25rem;
    --space-2:  0.5rem;
    --space-3:  0.75rem;
    --space-4:  1rem;
    --space-6:  1.5rem;
    --space-8:  2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* Layout */
    --container-max: 1200px;
    --container-pad: clamp(1rem, 5vw, 2rem);

    /* Effects */
    --radius-sm:  6px;
    --radius-md:  12px;
    --radius-lg:  20px;
    --shadow-glow: 0 0 40px rgba(37, 99, 235, 0.2);
    --transition:  0.2s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, textarea { font: inherit; }

.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;
}

/* ─── Layout Utilities ───────────────────────────────────────────── */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-pad);
}

/* ─── Typography ─────────────────────────────────────────────────── */
.text-accent { color: var(--color-accent-light); }

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent-light);
    margin-bottom: var(--space-3);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 700;
    line-height: 1.15;
    color: var(--color-text);
    margin-bottom: var(--space-4);
}

.section-sub {
    font-size: 1.0625rem;
    color: var(--color-text-muted);
    max-width: 580px;
    line-height: 1.7;
}

/* ─── Buttons ────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.6875rem 1.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
    border: 1px solid var(--color-accent);
}
.btn-primary:hover {
    background: var(--color-accent-light);
    border-color: var(--color-accent-light);
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.4);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--color-platinum);
    border: 1px solid var(--color-border-strong);
}
.btn-ghost:hover {
    border-color: var(--color-accent-border);
    color: var(--color-text);
    background: var(--color-accent-glow);
}

.btn-sm { padding: 0.5rem 1.125rem; font-size: 0.875rem; }

/* ─── Header ─────────────────────────────────────────────────────── */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(8, 12, 20, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

.site-header.scrolled {
    background: rgba(8, 12, 20, 0.97);
    border-bottom-color: var(--color-border-strong);
}

.header-inner {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    height: 68px;
}

/* Brand */
.site-title-link { display: inline-flex; align-items: center; }
.site-title-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}
.brand-elite   { color: var(--color-text); }
.brand-core    { color: var(--color-accent-light); }
.brand-systems { color: var(--color-text-muted); font-weight: 500; }

/* Custom logo sizing */
.custom-logo { height: 44px; width: auto; }

/* Nav */
.primary-nav { margin-left: auto; }

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.nav-menu a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color var(--transition);
    position: relative;
}
.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0; right: 0;
    height: 1px;
    background: var(--color-accent);
    transform: scaleX(0);
    transition: transform var(--transition);
}
.nav-menu a:hover { color: var(--color-text); }
.nav-menu a:hover::after { transform: scaleX(1); }

.header-cta { margin-left: var(--space-4); }

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
    margin-left: auto;
}
.nav-toggle span {
    display: block;
    width: 22px; height: 2px;
    background: var(--color-text-muted);
    border-radius: 2px;
    transition: var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── Hero ───────────────────────────────────────────────────────── */
.hero {
    position: relative;
    min-height: 100svh;
    display: flex;
    align-items: center;
    padding-top: 68px;
    overflow: hidden;
}

/* Grid background */
.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(37, 99, 235, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

/* Glow */
.hero-bg-glow {
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    width: 700px;
    height: 500px;
    background: radial-gradient(ellipse, rgba(37, 99, 235, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

.hero-inner {
    position: relative;
    z-index: 1;
    padding-block: var(--space-24);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-6);
    max-width: 760px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.375rem 0.875rem;
    border: 1px solid var(--color-accent-border);
    border-radius: 100px;
    background: var(--color-accent-glow);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-accent-light);
}

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

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

.hero-headline {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 7vw, 4.5rem);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.03em;
    color: var(--color-text);
}

.hero-sub {
    font-size: clamp(1rem, 2vw, 1.1875rem);
    color: var(--color-text-muted);
    max-width: 560px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
    margin-top: var(--space-2);
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    margin-top: var(--space-8);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
}

.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-value {
    font-family: var(--font-display);
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-text);
}
.stat-label { font-size: 0.75rem; color: var(--color-text-subtle); text-transform: uppercase; letter-spacing: 0.08em; }
.stat-divider { width: 1px; height: 36px; background: var(--color-border-strong); }

.hero-scroll-indicator {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
}
.scroll-line {
    width: 1px; height: 48px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollDrop 2s ease infinite;
}
@keyframes scrollDrop {
    0%   { transform: scaleY(0); transform-origin: top; opacity: 1; }
    50%  { transform: scaleY(1); transform-origin: top; opacity: 1; }
    100% { transform: scaleY(1); transform-origin: bottom; opacity: 0; }
}

/* ─── Services ───────────────────────────────────────────────────── */
.services {
    padding-block: var(--space-32);
    border-top: 1px solid var(--color-border);
}

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

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-6);
}

.service-card {
    position: relative;
    padding: var(--space-8);
    background: var(--color-bg-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    overflow: hidden;
}
.service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}
.service-card:hover {
    border-color: var(--color-accent-border);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}
.service-card:hover::before { opacity: 1; }

.card-icon {
    width: 44px; height: 44px;
    display: flex; align-items: center; justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--color-accent-glow);
    border: 1px solid var(--color-accent-border);
    color: var(--color-accent-light);
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
}

.card-desc {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.65;
    flex: 1;
}

.card-status {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-accent-light);
    padding: 0.25rem 0.625rem;
    border: 1px solid var(--color-accent-border);
    border-radius: 100px;
    background: var(--color-accent-glow);
    align-self: flex-start;
}

/* ─── About ──────────────────────────────────────────────────────── */
.about {
    padding-block: var(--space-32);
    background: var(--color-bg-2);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.about-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-24);
    align-items: center;
}

.about-text {
    font-size: 1rem;
    color: var(--color-text-muted);
    line-height: 1.75;
    margin-bottom: var(--space-4);
}

.about-pillars {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
}

.pillar {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-muted);
}
.pillar-icon { color: var(--color-accent-light); font-size: 0.75rem; }

/* About visual */
.about-visual { display: flex; align-items: center; justify-content: center; }

.visual-card {
    position: relative;
    width: 100%;
    max-width: 380px;
    padding: var(--space-8);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg);
    box-shadow: var(--shadow-glow);
}

.visual-line {
    position: absolute;
    top: 0; left: var(--space-8); right: var(--space-8);
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    border-radius: 2px;
}

.visual-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
}

.vg-item {
    padding: var(--space-4);
    text-align: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-muted);
    background: var(--color-bg-2);
    transition: var(--transition);
}
.vg-item.vg-accent {
    border-color: var(--color-accent-border);
    background: var(--color-accent-glow);
    color: var(--color-accent-light);
}

/* ─── Subscribe ──────────────────────────────────────────────────── */
.subscribe {
    padding-block: var(--space-32);
}

.subscribe-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-12);
}

.subscribe-form { width: 100%; max-width: 680px; }

.form-row {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.form-group { flex: 1; min-width: 200px; }

.form-group input {
    width: 100%;
    padding: 0.6875rem 1rem;
    background: var(--color-bg-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 0.9375rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input::placeholder { color: var(--color-text-subtle); }
.form-group input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.btn-loading { display: none; }
.btn.loading .btn-text   { display: none; }
.btn.loading .btn-loading { display: inline; }

.form-message {
    margin-top: var(--space-4);
    font-size: 0.9rem;
    min-height: 1.5rem;
}
.form-message.success { color: #34D399; }
.form-message.error   { color: #F87171; }

.form-note {
    margin-top: var(--space-3);
    font-size: 0.8125rem;
    color: var(--color-text-subtle);
}

/* ─── Footer ─────────────────────────────────────────────────────── */
.site-footer {
    padding-block: var(--space-12);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-6);
}

.footer-tagline {
    font-size: 0.8125rem;
    color: var(--color-text-subtle);
    margin-top: var(--space-1);
}

.footer-menu {
    display: flex;
    gap: var(--space-6);
    flex-wrap: wrap;
}
.footer-menu a {
    font-size: 0.875rem;
    color: var(--color-text-subtle);
    transition: color var(--transition);
}
.footer-menu a:hover { color: var(--color-text); }

.footer-copy {
    font-size: 0.8125rem;
    color: var(--color-text-subtle);
}

/* ─── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 900px) {
    .about-inner { grid-template-columns: 1fr; }
    .about-visual { display: none; }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .header-cta { display: none; }

    .primary-nav {
        position: fixed;
        top: 68px; left: 0; right: 0;
        background: rgba(8, 12, 20, 0.98);
        border-bottom: 1px solid var(--color-border);
        padding: var(--space-6) var(--container-pad);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.25s ease, opacity 0.25s ease;
        backdrop-filter: blur(12px);
    }
    .primary-nav.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    .nav-menu { flex-direction: column; align-items: flex-start; gap: var(--space-4); }

    .hero-stats { flex-wrap: wrap; gap: var(--space-4); }
    .stat-divider { display: none; }

    .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .form-row { flex-direction: column; }
    .form-row .btn { width: 100%; justify-content: center; }
}

/* ─── Scroll Animations ──────────────────────────────────────────── */
.fade-in {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}