/* =========================================================================
   C4S SECURITY PRIVATE LIMITED — MAIN STYLESHEET
   -------------------------------------------------------------------------
   Design language: "security operations center" — the vernacular of a
   live monitoring/surveillance interface (scan grids, radar sweeps,
   camera-viewfinder corner brackets, mono status readouts) used to
   signal that this is an AI/ML-driven, technology-first security
   company, not a traditional guard-supply agency. Keep new sections
   consistent with this one idea rather than introducing new decoration.

   Sections:
   1. Design tokens
   2. Reset / base
   3. Layout helpers
   4. Header / nav
   5. Buttons & form controls
   6. SOC decorative system (scan grid, viewfinder corners, status chips)
   7. Home sections
   8. Cards / service grid
   9. About / Technology / Industries page sections
   10. Contact page
   11. Footer
   12. Scroll reveal + responsive
   ========================================================================= */

/* ---------- 1. DESIGN TOKENS ---------- */
:root {
  --ink: #0B0E13;          /* near-black — primary dark surface */
  --panel: #131A24;        /* panel/card surface on dark */
  --panel-2: #1B2430;      /* slightly lighter panel */
  --cyan: #22D3C8;         /* electric cyan — primary accent */
  --cyan-light: #7CEAE1;   /* hover / highlight cyan */
  --alert: #FF4D4F;        /* used sparingly for threat/alert emphasis */
  --paper: #F5F7FA;        /* light background */
  --paper-dim: #EBEEF3;    /* alternating light section */
  --paper-ink: #10141C;    /* text on light bg */
  --paper-ink-soft: #4B5563; /* secondary text on light bg */
  --white: #FFFFFF;
  --line-on-dark: rgba(34, 211, 200, 0.16);
  --line-on-light: rgba(16, 20, 28, 0.10);

  --font-display: 'Rajdhani', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --sp-1: 0.5rem;
  --sp-2: 1rem;
  --sp-3: 1.5rem;
  --sp-4: 2.5rem;
  --sp-5: 4rem;
  --sp-6: 6.5rem;

  --max-width: 1180px;
  --radius: 3px;
}

/* ---------- 2. RESET / BASE ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--paper-ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}
h1 { font-size: clamp(2.3rem, 5vw, 4rem); letter-spacing: 0.005em; }
h2 { font-size: clamp(1.8rem, 3.2vw, 2.6rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); }

p { color: var(--paper-ink-soft); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
}
.eyebrow::before {
  content: '';
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  display: inline-block;
}

:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

/* ---------- 3. LAYOUT HELPERS ---------- */
.wrap { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--sp-3); }

.section { padding: var(--sp-6) 0; position: relative; }
.section--tight { padding: var(--sp-5) 0; }
.section--dark { background: var(--ink); color: var(--paper); }
.section--dark p { color: rgba(245,247,250,0.68); }
.section--dim { background: var(--paper-dim); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-5); align-items: start; }

.section-head { max-width: 640px; margin-bottom: var(--sp-4); }
.section-head h2 { margin-top: var(--sp-2); }
.section-head p { margin-top: var(--sp-2); font-size: 1.05rem; }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }

/* ---------- 4. HEADER / NAV ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(11, 14, 19, 0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line-on-dark);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--sp-2) var(--sp-3);
  max-width: var(--max-width); margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 0.65rem; font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; color: var(--paper); text-transform: uppercase; letter-spacing: 0.03em; }
.brand-mark { width: 36px; height: 36px; flex-shrink: 0; }
.brand span.small {
  display: block; font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: 0.12em;
  color: var(--cyan-light); font-weight: 400; text-transform: uppercase; margin-top: 2px;
}
.nav-links { display: flex; align-items: center; gap: 1.7rem; }
.nav-links a { font-family: var(--font-display); font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; font-size: 0.85rem; color: rgba(245,247,250,0.75); position: relative; padding: 0.3em 0; transition: color 0.2s ease; }
.nav-links a:hover, .nav-links a.active { color: var(--paper); }
.nav-links a.active::after { content: ''; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; background: var(--cyan); box-shadow: 0 0 6px var(--cyan); }
.nav-cta { background: var(--cyan); color: var(--ink) !important; padding: 0.6em 1.3em; font-size: 0.82rem; border-radius: var(--radius); transition: background 0.2s ease; }
.nav-cta:hover { background: var(--cyan-light); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--paper); display: block; }

/* ---------- 5. BUTTONS & FORM CONTROLS ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.6em;
  padding: 0.85em 1.7em; font-family: var(--font-display); font-weight: 700; letter-spacing: 0.03em; text-transform: uppercase;
  font-size: 0.9rem; border-radius: var(--radius); border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn--cyan { background: var(--cyan); color: var(--ink); }
.btn--cyan:hover { background: var(--cyan-light); }
.btn--outline-dark { border-color: rgba(16,20,28,0.3); color: var(--paper-ink); }
.btn--outline-dark:hover { border-color: var(--paper-ink); background: rgba(16,20,28,0.05); }
.btn--outline-light { border-color: rgba(245,247,250,0.35); color: var(--paper); }
.btn--outline-light:hover { border-color: var(--paper); background: rgba(245,247,250,0.08); }
.btn-row { display: flex; gap: var(--sp-2); flex-wrap: wrap; margin-top: var(--sp-4); }

label { display: block; font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--paper-ink-soft); margin-bottom: 0.5em; }
input, textarea, select {
  width: 100%; font-family: var(--font-body); font-size: 1rem; color: var(--paper-ink);
  background: var(--white); border: 1px solid rgba(16,20,28,0.2); border-radius: var(--radius);
  padding: 0.85em 1em; transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
input:focus, textarea:focus, select:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(34,211,200,0.16); outline: none; }
textarea { resize: vertical; min-height: 140px; }
.field { margin-bottom: var(--sp-3); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-3); }
.form-note { font-family: var(--font-mono); font-size: 0.78rem; color: var(--paper-ink-soft); margin-top: var(--sp-2); }
.form-status { display: none; padding: 0.9em 1.1em; border-radius: var(--radius); font-size: 0.92rem; margin-bottom: var(--sp-3); font-family: var(--font-mono); }
.form-status.show { display: block; }
.form-status.ok { background: rgba(34,211,200,0.12); color: #0E7C74; border: 1px solid rgba(34,211,200,0.35); }
.form-status.err { background: rgba(255,77,79,0.1); color: #B3261E; border: 1px solid rgba(255,77,79,0.3); }

/* ---------- 6. SOC DECORATIVE SYSTEM ---------- */
.scan-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--line-on-dark) 1px, transparent 1px), linear-gradient(90deg, var(--line-on-dark) 1px, transparent 1px);
  background-size: 42px 42px;
  pointer-events: none; opacity: 0.75;
}
.section:not(.section--dark) .scan-grid { background-image: linear-gradient(var(--line-on-light) 1px, transparent 1px), linear-gradient(90deg, var(--line-on-light) 1px, transparent 1px); }

/* Camera-viewfinder corner brackets — replaces generic card borders */
.viewfinder {
  position: relative; padding: var(--sp-3); border: 1px solid var(--line-on-light);
}
.section--dark .viewfinder { border-color: var(--line-on-dark); }
.viewfinder::before, .viewfinder::after {
  content: ''; position: absolute; width: 14px; height: 14px;
  border-top: 2px solid var(--cyan); border-left: 2px solid var(--cyan);
  top: -1px; left: -1px;
}
.viewfinder::after { top: auto; left: auto; bottom: -1px; right: -1px; border-top: none; border-left: none; border-bottom: 2px solid var(--cyan); border-right: 2px solid var(--cyan); }

/* Status chip — small mono "system readout" tag */
.status-chip {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--paper-ink-soft); display: inline-flex; align-items: center; gap: 0.5em;
  padding: 0.3em 0.7em; border: 1px dashed rgba(16,20,28,0.3); border-radius: var(--radius);
}
.status-chip::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); }
.section--dark .status-chip { color: var(--cyan-light); border-color: rgba(34,211,200,0.35); }

/* REC-style live indicator */
.live-tag {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--alert); display: inline-flex; align-items: center; gap: 0.4em;
}
.live-tag::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: var(--alert); animation: blink 1.6s ease-in-out infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.25; } }

/* Divider line with end ticks, used under stats/labels */
.dim-line { display: flex; align-items: center; gap: 0.5em; color: var(--paper-ink-soft); }
.dim-line::before, .dim-line::after { content: ''; flex: 1; height: 1px; background: rgba(16,20,28,0.25); }
.section--dark .dim-line { color: var(--cyan-light); }
.section--dark .dim-line::before, .section--dark .dim-line::after { background: rgba(245,247,250,0.2); }

/* ---------- 7. HOME — HERO ---------- */
.hero { background: var(--ink); color: var(--paper); position: relative; overflow: hidden; padding: var(--sp-6) 0 var(--sp-5); }
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--sp-5); align-items: center; }
.hero-copy h1 { margin-top: var(--sp-2); color: var(--paper); }
.hero-copy .lede { margin-top: var(--sp-3); font-size: 1.12rem; max-width: 48ch; color: rgba(245,247,250,0.75); }
.hero-stats { display: flex; gap: var(--sp-4); margin-top: var(--sp-5); flex-wrap: wrap; }
.hero-stat .num { font-family: var(--font-mono); font-size: 1.5rem; color: var(--cyan-light); display: block; }
.hero-stat .label { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: rgba(245,247,250,0.55); margin-top: 0.3em; }

.hero-visual { position: relative; z-index: 2; aspect-ratio: 1 / 1; max-width: 440px; margin: 0 auto; }
.hero-visual svg { width: 100%; height: 100%; }

.draw-line { stroke-dasharray: 700; stroke-dashoffset: 700; animation: draw 2.2s ease forwards; }
.draw-line.d1 { animation-delay: 0.1s; }
.draw-line.d2 { animation-delay: 0.45s; }
.draw-line.d3 { animation-delay: 0.8s; }
.draw-line.d4 { animation-delay: 1.15s; }
@keyframes draw { to { stroke-dashoffset: 0; } }

.pulse-node { opacity: 0; animation: fadeIn 0.6s ease forwards 1.6s; }
@keyframes fadeIn { to { opacity: 1; } }

.radar-sweep { transform-origin: 220px 220px; animation: sweep 4s linear infinite; opacity: 0.9; }
@keyframes sweep { to { transform: rotate(360deg); } }

/* ---------- 8. CARDS / SERVICE GRID ---------- */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-3); }
.card-grid--2 { grid-template-columns: repeat(2, 1fr); }

.service-card { background: var(--white); padding: var(--sp-4); display: flex; flex-direction: column; gap: var(--sp-2); }
.section--dark .service-card { background: var(--panel); }
.service-card .icon { width: 40px; height: 40px; color: var(--cyan); margin-bottom: var(--sp-1); }
.service-card h3 { margin-top: 0.2em; font-size: 1.05rem; }
.service-card p { font-size: 0.95rem; }
.service-card .tag-row { margin-top: auto; padding-top: var(--sp-2); display: flex; gap: 0.4em; flex-wrap: wrap; }
.service-card .tag-row a { font-family: var(--font-mono); font-size: 0.75rem; color: var(--cyan); letter-spacing: 0.04em; }
.section--dark .service-card .tag-row a { color: var(--cyan-light); }

.process-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-3); }
.process-step { position: relative; padding-top: var(--sp-3); border-top: 1px solid var(--line-on-light); }
.section--dark .process-step { border-top-color: var(--line-on-dark); }
.process-step .index { font-family: var(--font-mono); font-size: 0.78rem; color: var(--cyan); }
.process-step h3 { margin-top: 0.6em; font-size: 1.02rem; }
.process-step p { margin-top: 0.5em; font-size: 0.92rem; }

.cta-band { background: var(--cyan); color: var(--ink); padding: var(--sp-5) 0; text-align: center; }
.cta-band h2 { color: var(--ink); }
.cta-band p { color: rgba(11,14,19,0.75); max-width: 50ch; margin: var(--sp-2) auto 0; }
.cta-band .btn-row { justify-content: center; }
.cta-band .btn--cyan { background: var(--ink); color: var(--paper); }
.cta-band .btn--cyan:hover { background: var(--panel-2); }
.cta-band .btn--outline-dark { border-color: rgba(11,14,19,0.4); }

/* ---------- 9. ABOUT / TECHNOLOGY / INDUSTRIES ---------- */
.page-hero { background: var(--ink); color: var(--paper); padding: var(--sp-5) 0 var(--sp-4); position: relative; overflow: hidden; }
.page-hero h1 { margin-top: var(--sp-2); color: var(--paper); }
.page-hero p { margin-top: var(--sp-2); max-width: 60ch; color: rgba(245,247,250,0.72); }
.page-hero .wrap { position: relative; z-index: 2; }

.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-3); margin-top: var(--sp-4); }
.value-item { padding: var(--sp-3) 0; border-top: 1px solid var(--line-on-light); }
.value-item h3 { font-size: 1rem; }
.value-item p { margin-top: 0.5em; font-size: 0.92rem; }

.registry-table { width: 100%; border-collapse: collapse; margin-top: var(--sp-3); font-size: 0.95rem; }
.registry-table tr { border-bottom: 1px solid var(--line-on-light); }
.registry-table td { padding: 0.9em 0.5em; }
.registry-table td:first-child { font-family: var(--font-mono); font-size: 0.76rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--paper-ink-soft); width: 40%; }

.service-detail { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: var(--sp-5); align-items: start; padding: var(--sp-5) 0; border-top: 1px solid var(--line-on-light); }
.section--dark .service-detail { border-top-color: var(--line-on-dark); }
.service-detail:first-of-type { border-top: none; padding-top: 0; }
.service-detail .status-chip { margin-bottom: var(--sp-2); }
.service-detail h2 { margin-top: var(--sp-1); font-size: 1.7rem; }
.service-detail .desc { margin-top: var(--sp-3); font-size: 1.02rem; }

.spec-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-2) var(--sp-3); }
.spec-item { padding: var(--sp-2); border: 1px solid var(--line-on-light); }
.section--dark .spec-item { border-color: var(--line-on-dark); }
.spec-item .label { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--cyan); display: block; }
.spec-item .val { margin-top: 0.4em; font-size: 0.92rem; color: var(--paper-ink-soft); }
.section--dark .spec-item .val { color: rgba(245,247,250,0.68); }

.tech-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-3); margin-top: var(--sp-4); }
.tech-chip { border: 1px solid var(--line-on-dark); padding: var(--sp-3); text-align: center; }
.tech-chip .icon { width: 34px; height: 34px; color: var(--cyan); margin: 0 auto var(--sp-1); }
.tech-chip h4 { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--paper); }
.tech-chip p { font-size: 0.85rem; margin-top: 0.5em; }

.industry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-3); }
.industry-card { padding: var(--sp-3); border: 1px solid var(--line-on-light); text-align: left; }
.industry-card .icon { width: 32px; height: 32px; color: var(--cyan); margin-bottom: var(--sp-2); }
.industry-card h3 { font-size: 1rem; }
.industry-card p { margin-top: 0.5em; font-size: 0.88rem; }

/* ---------- 10. CONTACT PAGE ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1.15fr; gap: var(--sp-5); align-items: start; }
.contact-info-item { padding: var(--sp-3) 0; border-top: 1px solid var(--line-on-light); }
.contact-info-item:first-child { border-top: none; padding-top: 0; }
.contact-info-item .label { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--cyan); }
.contact-info-item p { margin-top: 0.4em; color: var(--paper-ink); font-size: 0.98rem; }
.contact-info-item a:hover { color: #0E9E93; text-decoration: underline; }
.contact-form-panel { background: var(--white); padding: var(--sp-4); border: 1px solid var(--line-on-light); }
.map-frame { margin-top: var(--sp-3); border: 1px solid var(--line-on-light); height: 260px; overflow: hidden; }
.map-frame iframe { width: 100%; height: 100%; border: 0; }

.emergency-strip { background: var(--panel); border: 1px solid rgba(255,77,79,0.3); padding: var(--sp-3); display: flex; align-items: center; justify-content: space-between; gap: var(--sp-2); flex-wrap: wrap; margin-top: var(--sp-4); }
.emergency-strip p { color: rgba(245,247,250,0.75); font-size: 0.92rem; }
.emergency-strip a.btn { flex-shrink: 0; }

/* ---------- 11. FOOTER ---------- */
.site-footer { background: var(--ink); color: rgba(245,247,250,0.68); padding: var(--sp-5) 0 var(--sp-3); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr; gap: var(--sp-4); padding-bottom: var(--sp-4); border-bottom: 1px solid var(--line-on-dark); }
.footer-brand .brand { margin-bottom: var(--sp-2); }
.footer-brand p { font-size: 0.9rem; max-width: 34ch; color: rgba(245,247,250,0.55); }
.footer-col h4 { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--cyan-light); margin-bottom: var(--sp-2); }
.footer-col ul { display: flex; flex-direction: column; gap: 0.6em; }
.footer-col a { font-size: 0.9rem; transition: color 0.2s ease; }
.footer-col a:hover { color: var(--paper); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: var(--sp-3); font-family: var(--font-mono); font-size: 0.74rem; color: rgba(245,247,250,0.4); flex-wrap: wrap; gap: 0.5em; }

/* ---------- 12. SCROLL REVEAL / RESPONSIVE ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { max-width: 320px; }
  .grid-2 { grid-template-columns: 1fr; gap: var(--sp-4); }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .process-list { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-strip { grid-template-columns: repeat(2, 1fr); }
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .service-detail { grid-template-columns: 1fr; gap: var(--sp-3); }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 700px) {
  .nav-links {
    position: fixed; top: 64px; left: 0; right: 0; background: var(--ink);
    flex-direction: column; align-items: flex-start; padding: var(--sp-3); gap: var(--sp-2);
    border-bottom: 1px solid var(--line-on-dark); transform: translateY(-140%); transition: transform 0.25s ease;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: flex; }
  .nav-cta { margin-top: var(--sp-1); }
  .card-grid, .card-grid--2 { grid-template-columns: 1fr; }
  .process-list { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
  .tech-strip { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: 1fr; }
  .spec-grid { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .section { padding: var(--sp-5) 0; }
  .section--tight { padding: var(--sp-4) 0; }
  .emergency-strip { flex-direction: column; align-items: flex-start; }
}