/* ============================================================
   VINEIN // OS  —  CORE STYLESHEET
   Vitor Teixeira · Futuristic Portfolio (crimson / red-only)
   core.css  →  tokens · reset · overlays · HUD · boot · nav · hero
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
  /* crimson, red-only */
  --red:        #ff2d2d;
  --red-bright: #ff5b5b;
  --red-deep:   #b00018;
  --red-glow:   rgba(255, 45, 45, 0.50);
  --red-soft:   rgba(255, 45, 45, 0.30);
  --red-dim:    rgba(255, 45, 45, 0.14);
  --red-line:   rgba(255, 45, 45, 0.22);

  /* near-black, faint warm tint */
  --bg:         #07070a;
  --bg-2:       #0b0b0f;
  --surface:    #111117;
  --surface-2:  #17171f;
  --line:       rgba(255, 255, 255, 0.07);
  --line-2:     rgba(255, 255, 255, 0.12);

  --white:  #f5f5f7;
  --light:  #d9d9df;
  --muted:  #9a9aa6;
  --dim:    #686873;

  --font-display: 'Orbitron', sans-serif;
  --font-body:    'Rajdhani', sans-serif;
  --font-mono:    'Space Mono', monospace;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --maxw: 1240px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scrollbar-width: thin;
  scrollbar-color: var(--red-deep) var(--bg);
}
html::-webkit-scrollbar { width: 8px; }
html::-webkit-scrollbar-track { background: var(--bg); }
html::-webkit-scrollbar-thumb { background: var(--red-deep); border-radius: 4px; }
html::-webkit-scrollbar-thumb:hover { background: var(--red); }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--light);
  font-size: 17px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* lock scroll while booting */
body.booting { overflow: hidden; height: 100vh; }

a { color: var(--red); text-decoration: none; transition: color .25s; }
a:hover { color: var(--red-bright); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

::selection { background: var(--red); color: #fff; }

a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ---------- Layout helpers ---------- */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(1.25rem, 4vw, 2.5rem); }

.section { padding: clamp(5rem, 11vw, 9rem) 0; position: relative; }
.section-dark { background:
  radial-gradient(120% 80% at 50% 0%, rgba(255,45,45,.05), transparent 60%),
  var(--bg-2);
}
.accent { color: var(--red); }

/* mono kicker tag */
.tag {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--font-mono);
  font-size: .72rem; letter-spacing: .22em; text-transform: uppercase;
  color: var(--red);
}
.tag::before { content: ''; width: 22px; height: 1px; background: var(--red); opacity: .8; }

/* ---------- Fixed overlays (grain · scanlines · vignette · grid) ---------- */
.fx-overlay { position: fixed; inset: 0; pointer-events: none; z-index: 9000; }

.fx-scanlines {
  background: repeating-linear-gradient(
    0deg, rgba(0,0,0,.16) 0, rgba(0,0,0,.16) 1px, transparent 1px, transparent 3px);
  opacity: .35; mix-blend-mode: multiply;
}
.fx-vignette {
  background: radial-gradient(130% 110% at 50% 50%, transparent 55%, rgba(0,0,0,.55) 100%);
}
.fx-grain { opacity: .045; }
.fx-grain::before {
  content: ''; position: absolute; inset: -200%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 1.2s steps(4) infinite;
}
@keyframes grain {
  0%{transform:translate(0,0)} 25%{transform:translate(-4%,3%)}
  50%{transform:translate(3%,-4%)} 75%{transform:translate(-3%,-2%)} 100%{transform:translate(2%,4%)}
}

/* ---------- Custom cursor (desktop / fine-pointer only) ---------- */
.cursor-dot, .cursor-ring { position: fixed; top: 0; left: 0; z-index: 9500; pointer-events: none;
  border-radius: 50%; transform: translate(-50%,-50%); display: none; }
.cursor-dot  { width: 6px; height: 6px; background: var(--red); box-shadow: 0 0 10px var(--red-glow); }
.cursor-ring { width: 34px; height: 34px; border: 1px solid var(--red-soft);
  transition: width .25s var(--ease), height .25s var(--ease), background .25s, border-color .25s; }
.cursor-ring.hover { width: 56px; height: 56px; border-color: var(--red); background: rgba(255,45,45,.08); }
@media (hover: hover) and (pointer: fine) {
  .cursor-dot, .cursor-ring { display: block; }
  body.cursor-on, body.cursor-on a, body.cursor-on button { cursor: none; }
}

/* ============================================================
   BOOT SEQUENCE
   ============================================================ */
#boot {
  position: fixed; inset: 0; z-index: 9999;
  background:
    radial-gradient(80% 60% at 50% 40%, rgba(255,45,45,.08), transparent 60%),
    #050507;
  display: flex; align-items: center; justify-content: center;
  transition: opacity .7s var(--ease), visibility .7s;
}
#boot.gone { opacity: 0; visibility: hidden; pointer-events: none; }
#boot .boot-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--red-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--red-line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(70% 60% at 50% 45%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(70% 60% at 50% 45%, #000 30%, transparent 80%);
  opacity: .5;
}
.boot-scan { position: absolute; left: 0; right: 0; height: 2px; top: 0;
  background: linear-gradient(90deg, transparent, var(--red), transparent);
  box-shadow: 0 0 24px 4px var(--red-glow); animation: boot-scan 3.2s var(--ease) infinite; }
@keyframes boot-scan { 0%{top:-2%;opacity:0} 12%{opacity:1} 88%{opacity:1} 100%{top:102%;opacity:0} }

.boot-inner { position: relative; width: min(640px, 88vw); }
.boot-head {
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--font-mono); font-size: .7rem; letter-spacing: .18em;
  color: var(--dim); text-transform: uppercase; margin-bottom: 1.25rem;
}
.boot-head .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--red);
  box-shadow: 0 0 10px var(--red); animation: blink 1s steps(2) infinite; display: inline-block; margin-right: .5rem; }
@keyframes blink { 50% { opacity: .25; } }

.boot-log { font-family: var(--font-mono); font-size: clamp(.72rem, 2.3vw, .82rem);
  line-height: 1.9; color: var(--muted); min-height: 168px; }
.boot-log .ln { opacity: 0; transform: translateX(-6px); }
.boot-log .ln.show { opacity: 1; transform: none; transition: opacity .25s, transform .25s; }
.boot-log .ok { color: var(--red); }
.boot-log .ln .c { color: var(--dim); }

.boot-bar-wrap { margin-top: 1.5rem; }
.boot-bar-meta { display: flex; justify-content: space-between;
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .14em; color: var(--dim); margin-bottom: .5rem; }
.boot-bar { height: 4px; background: var(--surface); border: 1px solid var(--line); overflow: hidden; }
.boot-bar i { display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, var(--red-deep), var(--red)); box-shadow: 0 0 16px var(--red-glow); }

.boot-enter { margin-top: 2.25rem; text-align: center; opacity: 0; transform: translateY(12px);
  transition: opacity .6s var(--ease), transform .6s var(--ease); pointer-events: none; }
.boot-enter.ready { opacity: 1; transform: none; pointer-events: auto; }
.boot-title { font-family: var(--font-display); font-weight: 900;
  font-size: clamp(2.4rem, 9vw, 4.5rem); letter-spacing: .14em; color: var(--white);
  text-shadow: 0 0 30px var(--red-glow); margin-bottom: 1.5rem; line-height: 1; }
.boot-title small { display: block; font-size: .26em; letter-spacing: .5em; color: var(--red); margin-top: .6em; }

/* ---------- Neon button (shared) ---------- */
.btn {
  position: relative; display: inline-flex; align-items: center; gap: .65rem;
  font-family: var(--font-mono); font-size: .8rem; font-weight: 700;
  letter-spacing: .18em; text-transform: uppercase; color: var(--white);
  padding: 1rem 2rem; background: rgba(255,45,45,.06);
  border: 1px solid var(--red-line); overflow: hidden;
  transition: color .3s, border-color .3s, box-shadow .3s, background .3s, transform .25s var(--ease);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}
.btn i { transition: transform .3s var(--ease); }
.btn::before { content: ''; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(90deg, var(--red-deep), var(--red));
  transform: translateX(-101%); transition: transform .4s var(--ease); }
.btn:hover { color: #fff; border-color: var(--red);
  box-shadow: 0 0 0 1px var(--red), 0 10px 40px -8px var(--red-glow); transform: translateY(-2px); }
.btn:hover::before { transform: translateX(0); }
.btn:hover i { transform: translateX(4px); }
.btn-ghost { background: transparent; }

/* ============================================================
   HUD FRAME  (fixed corner brackets + side readouts)
   ============================================================ */
.hud { position: fixed; inset: 0; pointer-events: none; z-index: 800; }
.hud .corner { position: absolute; width: 26px; height: 26px; border: 1.5px solid var(--red-line); }
.hud .corner.tl { top: 14px; left: 14px; border-right: 0; border-bottom: 0; }
.hud .corner.tr { top: 14px; right: 14px; border-left: 0; border-bottom: 0; }
.hud .corner.bl { bottom: 14px; left: 14px; border-right: 0; border-top: 0; }
.hud .corner.br { bottom: 14px; right: 14px; border-left: 0; border-top: 0; }
.hud .edge { position: absolute; font-family: var(--font-mono); font-size: .62rem;
  letter-spacing: .2em; color: var(--dim); text-transform: uppercase; }
.hud .edge.left  { left: 16px; top: 50%; transform: rotate(180deg); writing-mode: vertical-rl; }
.hud .edge.right { right: 16px; top: 50%; writing-mode: vertical-rl; }

/* ============================================================
   NAVIGATION
   ============================================================ */
#nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem clamp(1.25rem, 4vw, 2.5rem);
  transition: background .4s, backdrop-filter .4s, box-shadow .4s, padding .4s;
}
#nav.scrolled {
  background: rgba(7,7,10,.72); backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: 0 1px 0 var(--red-line), 0 18px 40px -30px rgba(0,0,0,.9);
  padding-top: .8rem; padding-bottom: .8rem;
}
.nav-logo { font-family: var(--font-display); font-size: 1.4rem; font-weight: 900;
  color: var(--white); letter-spacing: .04em; display: flex; align-items: center; }
.nav-logo b { color: var(--red); text-shadow: 0 0 14px var(--red-glow); }
.nav-logo .dot { color: var(--red); }

.nav-links { display: flex; align-items: center; gap: .15rem; }
.nav-link { position: relative; font-family: var(--font-body); font-size: 1rem; font-weight: 600;
  color: var(--muted); padding: .5rem .85rem; letter-spacing: .02em; transition: color .25s; }
.nav-link::after { content: ''; position: absolute; left: .85rem; right: .85rem; bottom: .3rem;
  height: 1px; background: var(--red); transform: scaleX(0); transform-origin: left; transition: transform .3s var(--ease); }
.nav-link:hover { color: var(--white); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active { color: var(--white); }
.nav-link.active::after { transform: scaleX(1); }
.nav-link.ext { color: var(--dim); font-size: .9rem; }
.nav-link.ext i { font-size: .7rem; margin-left: .25rem; }
.nav-link.ext:hover { color: var(--red); }

.nav-toggle { display: none; flex-direction: column; gap: 6px; background: none; border: none;
  padding: 8px; z-index: 1001; }
.nav-toggle span { display: block; width: 26px; height: 2px; background: var(--white);
  transition: transform .3s var(--ease), opacity .3s; }
.nav-toggle.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
#hero { position: relative; min-height: 100svh; display: flex; align-items: center;
  overflow: hidden; padding-top: 6rem; padding-bottom: 4rem; }
#hero-canvas { position: absolute; inset: 0; z-index: 1; }
.hero-grid { position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(255,45,45,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,45,45,.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(100% 90% at 70% 40%, #000 20%, transparent 85%);
  -webkit-mask-image: radial-gradient(100% 90% at 70% 40%, #000 20%, transparent 85%);
}
.hero-aura { position: absolute; z-index: 0; width: 60vw; height: 60vw; max-width: 820px; max-height: 820px;
  right: -6vw; top: 50%; transform: translateY(-50%);
  background: radial-gradient(circle, rgba(255,45,45,.20), rgba(255,45,45,.05) 40%, transparent 68%);
  filter: blur(8px); animation: aura 8s ease-in-out infinite; }
@keyframes aura { 0%,100%{opacity:.8; transform:translateY(-50%) scale(1)} 50%{opacity:1; transform:translateY(-52%) scale(1.06)} }

.hero-wrap { position: relative; z-index: 10; width: 100%; max-width: var(--maxw);
  margin: 0 auto; padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 2rem; align-items: center; }

.hero-copy { max-width: 640px; }
.hero-kicker { margin-bottom: 1.4rem; }
.hero-name { font-family: var(--font-display); font-weight: 900;
  font-size: clamp(2.6rem, 7.5vw, 6rem); line-height: .98; letter-spacing: .02em; color: var(--white); }
.hero-name .ln { display: block; }
.hero-alias { font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1rem, 3vw, 1.5rem); letter-spacing: .6em; color: var(--red);
  margin: 1rem 0 0 .2em; text-shadow: 0 0 26px var(--red-glow); }
.hero-typed { font-family: var(--font-mono); font-size: clamp(.95rem, 2.4vw, 1.15rem);
  color: var(--light); margin-top: 1.6rem; min-height: 1.6em; }
.hero-typed .out { color: var(--red); }
.cursor-blink { color: var(--red); font-weight: 700; animation: cblink .8s steps(2) infinite; }
@keyframes cblink { 50% { opacity: 0; } }

.hero-cta { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.4rem; }
.hero-socials { display: flex; gap: .6rem; margin-top: 2.4rem; }
.hero-socials a { width: 46px; height: 46px; display: grid; place-items: center;
  border: 1px solid var(--line-2); color: var(--muted); font-size: 1.1rem; background: var(--surface);
  transition: color .25s, border-color .25s, box-shadow .25s, transform .25s var(--ease);
  clip-path: polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px); }
.hero-socials a:hover { color: var(--red); border-color: var(--red); transform: translateY(-3px);
  box-shadow: 0 0 0 1px var(--red), 0 10px 28px -10px var(--red-glow); }

/* hero portrait (image bleeds into black bg) */
.hero-figure { position: relative; justify-self: end; align-self: stretch; display: flex; align-items: flex-end; }
.hero-portrait { position: relative; width: 100%; max-width: 460px; margin-left: auto; }
.hero-portrait img { width: 100%; display: block;
  -webkit-mask-image: linear-gradient(180deg, transparent 0, #000 14% 86%, transparent 100%);
  mask-image: linear-gradient(180deg, transparent 0, #000 14% 86%, transparent 100%);
  filter: contrast(1.05) saturate(1.05); animation: floaty 7s ease-in-out infinite; }
@keyframes floaty { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-14px)} }
.hero-portrait .p-scan { position: absolute; inset: 0; pointer-events: none;
  background: repeating-linear-gradient(0deg, rgba(255,45,45,.05) 0 2px, transparent 2px 4px);
  mix-blend-mode: screen; opacity: .5; }
.hero-portrait .p-bracket { position: absolute; width: 30px; height: 30px; border: 2px solid var(--red); }
.hero-portrait .p-bracket.tl { top: 8%; left: -6px; border-right: 0; border-bottom: 0; }
.hero-portrait .p-bracket.br { bottom: 12%; right: -6px; border-left: 0; border-top: 0; }
.hero-portrait .p-label { position: absolute; bottom: 14%; left: -10px;
  font-family: var(--font-mono); font-size: .6rem; letter-spacing: .2em; color: var(--red);
  background: var(--bg); padding: .25rem .5rem; border: 1px solid var(--red-line); }

.hero-foot { position: absolute; left: 0; right: 0; bottom: 1.4rem; z-index: 10;
  display: flex; justify-content: space-between; align-items: flex-end;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem); pointer-events: none; }
.hero-status { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .14em; color: var(--dim); }
.hero-status b { color: var(--red); }
.scroll-ind { display: flex; flex-direction: column; align-items: center; gap: .5rem; }
.scroll-ind span { font-family: var(--font-mono); font-size: .6rem; letter-spacing: .24em; color: var(--dim); writing-mode: vertical-rl; }
.scroll-ind .line { width: 1px; height: 46px; background: linear-gradient(var(--red), transparent); position: relative; overflow: hidden; }
.scroll-ind .line::after { content: ''; position: absolute; top: -50%; left: 0; width: 100%; height: 50%;
  background: var(--red); box-shadow: 0 0 8px var(--red); animation: scrolldot 2s var(--ease) infinite; }
@keyframes scrolldot { 0%{top:-50%} 100%{top:120%} }

/* ---------- Section header ---------- */
.section-header { margin-bottom: clamp(2.5rem, 6vw, 4rem); max-width: 720px; }
.section-title { font-family: var(--font-display); font-weight: 800;
  font-size: clamp(2rem, 5.5vw, 3.4rem); letter-spacing: .02em; color: var(--white); margin-top: .8rem; line-height: 1.05; }
.section-desc { font-size: 1.1rem; color: var(--muted); margin-top: 1rem; max-width: 640px; text-wrap: pretty; }
.subsection-header { margin: clamp(3rem,7vw,5rem) 0 clamp(1.8rem,4vw,2.8rem); }
.subsection-title { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.3rem,3.2vw,1.7rem);
  color: var(--white); letter-spacing: .03em; margin-top: .6rem; }

/* ---------- Reveal on scroll ---------- */
[data-reveal] { opacity: 0; transform: translateY(34px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
[data-reveal].in { opacity: 1; transform: none; }
[data-reveal][data-d="1"] { transition-delay: .08s; }
[data-reveal][data-d="2"] { transition-delay: .16s; }
[data-reveal][data-d="3"] { transition-delay: .24s; }
[data-reveal][data-d="4"] { transition-delay: .32s; }
[data-reveal][data-d="5"] { transition-delay: .40s; }