/* ═══════════════════════════════════════════════════════
   SR TECH BIM SOLUTION LLC — Main Stylesheet
   Professional BIM/VDC website
   Fully responsive: Mobile (320px+) → Desktop (1920px+)
═══════════════════════════════════════════════════════ */

/* ════════ DESIGN TOKENS ════════ */
:root {
  /* Brand Colors */
  --navy:    #1B3652;
  --navy-2:  #102338;
  --steel:   #2C5F8C;
  --orange:  #F5841F;
  --amber:   #B8690F;

  /* Neutrals */
  --bg:      #F5F4F0;
  --bg-2:    #EDECE8;
  --bg-3:    #E3E1DC;
  --white:   #FDFCFA;
  --dark:    #181715;

  /* Text */
  --muted:   #6A6560;
  --light:   #9A9590;

  /* Borders & Shadows */
  --border:    rgba(26, 25, 23, 0.10);
  --border-2:  rgba(26, 25, 23, 0.06);
  --shadow:    0 2px 16px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.13);

  /* Fonts */
  --font-head: "Syne", sans-serif;
  --font-body: "DM Sans", sans-serif;

  /* Layout */
  --container-max: 1260px;
  --section-pad-y: 96px;
  --nav-height:    72px;
}

/* ════════ RESET ════════ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--dark);
  font-family: var(--font-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  line-height: 1.5;
}

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

a {
  text-decoration: none;
  color: inherit;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-2);
}

::-webkit-scrollbar-thumb {
  background: var(--navy);
  border-radius: 3px;
}

/* ════════ TYPOGRAPHY HELPERS ════════ */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.eyebrow-bar {
  width: 18px;
  height: 2px;
  background: var(--orange);
  flex-shrink: 0;
}

.eyebrow-text {
  font-size: 11px;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-head);
  font-size: clamp(28px, 3.8vw, 50px);
  font-weight: 800;
  color: var(--dark);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.section-title em {
  font-style: normal;
  color: var(--navy);
}

.section-title.on-dark {
  color: #fff;
}

.section-title.on-dark em {
  color: var(--orange);
}

.section-desc {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.82;
  font-weight: 300;
  max-width: 540px;
  margin-top: 14px;
}

.section-desc.on-dark {
  color: rgba(255, 255, 255, 0.45);
}

/* ════════ LAYOUT UTILITIES ════════ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 56px;
}

.section-padding {
  padding: var(--section-pad-y) 0;
}

/* ════════ BUTTONS ════════ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: all 0.22s ease;
  border: none;
  text-decoration: none;
}

.btn-primary {
  padding: 14px 30px;
  background: var(--orange);
  color: #fff;
}

.btn-primary:hover {
  background: #d4700f;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(245, 132, 31, 0.35);
}

.btn-navy {
  padding: 13px 26px;
  background: var(--navy);
  color: #fff;
}

.btn-navy:hover {
  background: var(--orange);
}

.btn-ghost-white {
  padding: 13px 28px;
  border: 1.5px solid rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.85);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
}

.btn-ghost-white:hover {
  border-color: rgba(255, 255, 255, 0.75);
  color: #fff;
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-head);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.05em;
  transition: color 0.2s;
}

.btn-link svg {
  transition: transform 0.2s;
}

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

.btn-link:hover svg {
  transform: translateX(3px);
}

/* ════════ REVEAL ANIMATIONS ════════ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}