/* ============================================================
   TANGENTTRACE — CASE STUDY STYLESHEET
   Mirrors index.html design tokens & core components exactly.
   ============================================================ */

/* TOKENS & RESET */
:root {
  --bg: #0B0B0B; --card: #131313; --border: #2A2A2A; --muted: #888888;
  --text: #E0E0E0; --blue: #0047AB; --blue-lt: #1A5FCC; --white: #FFFFFF;
  --font-h: 'Unbounded', sans-serif; --font-b: 'Lexend Deca', sans-serif;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94); --r: 4px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

/* ANTI-THEFT */
body { background: var(--bg); color: var(--text); font-family: var(--font-b); font-weight: 300; line-height: 1.65; overflow-x: hidden; cursor: none; -webkit-user-select: none; user-select: none; }
img, svg { -webkit-user-drag: none; user-drag: none; }
::selection { background: var(--blue); color: var(--white); }

/* DYNAMIC CURSOR */
.cursor { position: fixed; top: 0; left: 0; pointer-events: none; z-index: 999999; transform: translateZ(0); }
.cursor-dot { width: 6px; height: 6px; background: var(--blue); border-radius: 50%; transform: translate(-50%, -50%); }
.cursor-ring { width: 32px; height: 32px; border: 1.5px solid var(--blue); border-radius: 50%; transform: translate(-50%, -50%); transition: width 0.3s, height 0.3s, opacity 0.3s; position: absolute; top: 0; left: 0; opacity: 0.5; }
.cursor-expand .cursor-ring { width: 60px; height: 60px; opacity: 0.2; background: rgba(0, 71, 171, 0.1); border-color: transparent; }

/* TEXTURES */
body::before {
  content: ''; position: fixed; inset: 0; z-index: -2; pointer-events: none; opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.grid-bg { position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: 0.03; background-image: linear-gradient(var(--white) 1px, transparent 1px), linear-gradient(90deg, var(--white) 1px, transparent 1px); background-size: 60px 60px; }

/* ANIMATIONS */
@keyframes fadeUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.d1 { transition-delay: 0.1s; } .d2 { transition-delay: 0.2s; } .d3 { transition-delay: 0.3s; }

/* NAVIGATION */
header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; transform: translateZ(0); }
nav { padding: 22px 5%; display: flex; justify-content: space-between; align-items: center; transition: all 0.4s var(--ease); border-bottom: 1px solid transparent; }
nav.scrolled { background: rgba(11, 11, 11, 0.95); backdrop-filter: blur(16px); border-bottom-color: var(--border); padding: 16px 5%; }
.nav-brand { display: flex; align-items: center; gap: 12px; text-decoration: none; cursor: none; }
.nav-logo-icon { width: 28px; height: 28px; object-fit: contain; }
.logo-text { font-family: var(--font-h); font-weight: 800; font-size: 1.1rem; color: var(--white); text-transform: uppercase; letter-spacing: -0.02em; }
.logo-text span { color: var(--blue); }
.nav-right { display: flex; align-items: center; gap: 36px; }
.nav-links { display: flex; gap: 36px; align-items: center; list-style: none; }
.nav-links a { font-family: var(--font-b); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); text-decoration: none; transition: color 0.3s; cursor: none; }
.nav-links a:hover { color: var(--white); }
.nav-cta { background: var(--blue) !important; color: var(--white) !important; padding: 12px 24px !important; font-family: var(--font-b); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; text-decoration: none; transition: background 0.3s, transform 0.3s !important; border-radius: var(--r); cursor: none; }
.nav-cta:hover { background: var(--blue-lt) !important; transform: translateY(-2px); }

/* BUTTONS */
.btn-p, .btn-g { display: inline-block; padding: 18px 40px; font-family: var(--font-b); font-weight: 700; font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; text-decoration: none; transition: var(--ease) 0.4s; cursor: none; border-radius: var(--r); }
.btn-p { background: var(--blue); color: var(--white); }
.btn-p:hover { background: var(--white); color: var(--bg); transform: translateY(-3px); }
.btn-g { border: 1px solid var(--border); color: var(--text); }
.btn-g:hover { border-color: var(--blue); color: var(--blue); }

/* SECTION UTILS */
.tag { font-family: var(--font-b); font-weight: 700; font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--blue); display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.tag::before { content: ''; width: 24px; height: 1px; background: var(--blue); }
.st { font-family: var(--font-h); font-size: clamp(2rem, 4vw, 3.5rem); font-weight: 800; text-transform: uppercase; color: var(--white); line-height: 1.1; letter-spacing: -0.02em; }
.st .dm { color: var(--muted); }

/* ===================== CASE LAYOUT ===================== */
.case-main { padding: 150px 5% 0; position: relative; z-index: 10; }
.case-wrap { max-width: 1180px; margin: 0 auto; }

.back-link { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-b); font-weight: 700; font-size: 0.7rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--muted); text-decoration: none; margin-bottom: 36px; transition: color 0.3s; cursor: none; }
.back-link:hover { color: var(--blue); }
.back-link svg { width: 14px; height: 14px; }

.case-intro { font-family: var(--font-b); font-size: 1.1rem; color: var(--muted); line-height: 1.8; max-width: 720px; margin-top: 28px; }
.case-intro strong { color: var(--white); font-weight: 400; }

/* META STRIP */
.case-meta { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); margin: 50px 0 70px; }
.cm-item { background: var(--bg); padding: 24px 26px; }
.cm-label { font-family: var(--font-b); font-weight: 700; font-size: 0.62rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--blue); margin-bottom: 8px; }
.cm-value { font-family: var(--font-b); font-size: 0.92rem; color: var(--text); line-height: 1.55; }

/* FIGURES */
.case-fig { margin: 0 0 16px; }
.fig-frame { position: relative; display: block; overflow: hidden; border: 1px solid var(--border); background: var(--card); cursor: none; transform: translateZ(0); }
.fig-frame img { width: 100%; height: auto; display: block; transition: transform 0.8s var(--ease), filter 0.4s ease; filter: brightness(0.94); }
.fig-frame:hover img { transform: scale(1.02); filter: brightness(1); }
.case-fig figcaption { font-family: var(--font-b); font-weight: 700; font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); padding: 14px 2px 30px; display: flex; align-items: center; gap: 10px; }
.case-fig figcaption::before { content: ''; width: 18px; height: 1px; background: var(--blue); flex: none; }

.two-up { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: start; }

/* WATERMARK (same system as index) */
.watermark-overlay { position: absolute; inset: 0; z-index: 5; pointer-events: none; background-image: url('../tt.png'); background-repeat: repeat; background-size: 80px 80px; background-position: center; opacity: 0.08; transition: opacity 0.4s ease; }
.fig-frame:hover .watermark-overlay { opacity: 0.14; }

/* LIGHTBOX ANTI-THEFT PROTECTION SHIELD */
.gslide-media { position: relative; transform: translateZ(0); display: flex; align-items: center; justify-content: center; }
.wm-lightbox { position: absolute; background-image: url('../tt.png'); background-repeat: repeat; background-size: 80px 80px; background-position: center; opacity: 0.15; pointer-events: none; z-index: 999; transform-origin: center center; will-change: transform, width, height, left, top; }

/* TEXT BLOCKS */
.case-block { margin: 50px 0 56px; max-width: 760px; }
.case-h { font-family: var(--font-h); font-size: 1.15rem; font-weight: 800; text-transform: uppercase; color: var(--white); display: flex; align-items: center; gap: 15px; margin-bottom: 16px; }
.case-h::before { content: ''; width: 12px; height: 12px; background: var(--blue); display: inline-block; flex: none; }
.case-p { font-family: var(--font-b); font-size: 1rem; color: var(--muted); line-height: 1.8; margin-bottom: 14px; }
.case-p strong { color: var(--text); font-weight: 400; }

/* NEXT PROJECT */
.next-project { display: flex; justify-content: space-between; align-items: center; gap: 24px; border: 1px solid var(--border); background: var(--card); padding: 40px 44px; margin: 80px 0 0; text-decoration: none; transition: border-color 0.3s, background 0.3s; cursor: none; transform: translateZ(0); }
.next-project:hover { border-color: var(--blue); background: #161616; }
.np-label { font-family: var(--font-b); font-weight: 700; font-size: 0.65rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--blue); margin-bottom: 10px; }
.np-title { font-family: var(--font-h); font-size: clamp(1.2rem, 2.6vw, 1.9rem); font-weight: 800; text-transform: uppercase; color: var(--white); line-height: 1.15; }
.np-arrow { font-family: var(--font-h); font-size: 2rem; color: var(--blue); flex: none; transition: transform 0.3s var(--ease); }
.next-project:hover .np-arrow { transform: translateX(8px); }

/* CTA BAND */
.case-cta { border: 1px solid var(--border); border-left: 3px solid var(--blue); background: var(--card); padding: 56px 50px; margin: 26px 0 110px; }
.case-cta .st { font-size: clamp(1.5rem, 3.2vw, 2.4rem); margin-bottom: 16px; }
.cta-sub { font-family: var(--font-b); font-size: 1rem; color: var(--muted); line-height: 1.8; max-width: 640px; margin-bottom: 32px; }
.cta-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* STICKY WHATSAPP & FOOTER */
.swa { position: fixed; bottom: 28px; right: 28px; z-index: 200; width: 52px; height: 52px; border-radius: 50%; background: #25D366; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 20px rgba(37, 211, 102, 0.3); transition: transform 0.3s; text-decoration: none; cursor: none; transform: translateZ(0); will-change: transform; }
.swa:hover { transform: scale(1.1); }
.swa svg { width: 26px; height: 26px; color: #fff; }

footer { padding: 50px 5%; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; border-top: 1px solid var(--border); position: relative; z-index: 10; }
.footer-links { display: flex; gap: 24px; align-items: center; list-style: none; flex-wrap: wrap; }
.footer-links a { font-family: var(--font-b); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); text-decoration: none; transition: color 0.3s; cursor: none; }
.footer-links a:hover { color: var(--white); }
.fc { font-family: var(--font-b); font-size: 0.75rem; color: var(--muted); font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; }

/* RESPONSIVE */
@media (max-width: 960px) {
  .case-meta { grid-template-columns: 1fr 1fr; }
  .two-up { grid-template-columns: 1fr; }
  .next-project { padding: 30px 26px; }
  .case-cta { padding: 40px 28px; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-cta { padding: 10px 16px !important; font-size: 0.65rem !important; }
  .logo-text { font-size: 0.95rem; }
  .nav-logo-icon { width: 24px; height: 24px; }
  body, a, button { cursor: auto !important; }
  .cursor { display: none !important; }
  .case-meta { grid-template-columns: 1fr; }
  .case-main { padding-top: 130px; }
  footer { flex-direction: column; text-align: center; justify-content: center; gap: 16px; }
  .footer-links { justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}