/* ==========================================================================
   JOSE TAFUR - AI DEVELOPER & CREATIVE TECHNOLOGIST
   "Signal & Noise" Dark Theme
   ========================================================================== */

/* CSS CUSTOM PROPERTIES
   ========================================================================== */
:root {
  --bg-base: #0A0E17;
  --bg-surface: #131A2B;
  --cyan: #00D4FF;
  --amber: #FF8A00;
  --purple: #7B2FFF;
  --text-primary: #E8EDF5;
  --text-muted: #7A8BA8;
  --border-glow: rgba(0, 212, 255, 0.12);

  --container-max: 800px;
  --section-padding: 120px;

  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --transition-base: 0.3s ease;
  --transition-reveal: 0.8s ease;

  --scroll-progress: 0;
  --scroll-velocity: 0;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-base);
  overflow-x: hidden;
  min-height: 100vh;
}

/* Film grain overlay */
@keyframes grain-drift {
  0%   { transform: translate(0, 0); }
  25%  { transform: translate(-128px, -64px); }
  50%  { transform: translate(64px, -128px); }
  75%  { transform: translate(-64px, 128px); }
  100% { transform: translate(0, 0); }
}

body::after {
  content: '';
  position: fixed;
  top: -256px;
  left: -256px;
  width: calc(100% + 512px);
  height: calc(100% + 512px);
  pointer-events: none;
  z-index: 9999;
  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='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
  animation: grain-drift 0.8s steps(4) infinite;
  will-change: transform;
}

/* Dashed grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.03;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 99px, rgba(0, 212, 255, 0.5) 99px, rgba(0, 212, 255, 0.5) 100px),
    repeating-linear-gradient(90deg, transparent, transparent 99px, rgba(0, 212, 255, 0.5) 99px, rgba(0, 212, 255, 0.5) 100px);
  background-size: 100px 100px;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-base);
}

p { margin-bottom: 1.5rem; }
p:last-child { margin-bottom: 0; }
ul { list-style: none; }

/* LAYOUT
   ========================================================================== */
.container {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 2rem;
  padding-right: 2rem;
}

.section {
  padding-top: var(--section-padding);
  padding-bottom: var(--section-padding);
  position: relative;
  z-index: 5;
}

.scene {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Section separator */
.section + .section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(80%, 600px);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-glow) 30%, var(--border-glow) 70%, transparent);
}

/* TYPOGRAPHY
   ========================================================================== */
.section__heading {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-weight: 700;
}

.section__heading--center { text-align: center; }

.section__label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--cyan);
  margin-bottom: 2rem;
  display: block;
}

/* BUTTONS
   ========================================================================== */
.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
  background-color: transparent;
  font-weight: 400;
  color: var(--text-primary);
}

.btn--glow {
  background-color: transparent;
  color: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.btn--glow:hover {
  background-color: rgba(0, 212, 255, 0.1);
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.3);
  transform: translateY(-2px);
}

@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.2); }
  50% { box-shadow: 0 0 35px rgba(0, 212, 255, 0.4); }
}

/* ==========================================================================
   REVEAL ANIMATION SYSTEM
   ========================================================================== */
[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal="blur"] {
  filter: blur(20px) brightness(0.3);
  transform: none;
  transition: opacity 1.5s ease, filter 1.5s ease;
}

[data-reveal="blur"].is-visible {
  filter: blur(0) brightness(1);
  opacity: 1;
}

[data-reveal="words"] {
  opacity: 1;
  transform: none;
}

.word {
  display: inline-block;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: calc(var(--i) * 0.15s);
}

[data-reveal="words"].is-visible .word {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal="dramatic"] {
  opacity: 0;
  transform: scale(0.85);
  filter: blur(6px);
  transition: opacity 1.2s ease-out, transform 1.2s ease-out, filter 1.2s ease-out;
}

[data-reveal="dramatic"].is-visible {
  opacity: 1;
  transform: scale(1);
  filter: blur(0);
}

/* ==========================================================================
   AMBIENT GLOW SYSTEM
   ========================================================================== */
.ambient-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0;
  transition: opacity 1.2s ease, background 1.5s ease;
}

.ambient-glow.is-active { opacity: 1; }

.ambient-glow[data-glow="hero"] {
  background: radial-gradient(ellipse 60% 50% at 50% 50%, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
}

.ambient-glow[data-glow="about"] {
  background: radial-gradient(ellipse 50% 60% at 30% 50%, rgba(0, 212, 255, 0.06) 0%, transparent 70%);
}

.ambient-glow[data-glow="contact"] {
  background: radial-gradient(ellipse 60% 50% at 50% 50%, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
}

/* ==========================================================================
   FLOATING PARTICLE FIELD
   ========================================================================== */
#particle-field {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
}

/* ==========================================================================
   SCENE TRANSITION FLARE
   ========================================================================== */
@keyframes flare-sweep {
  0% { opacity: 0; transform: translateX(-100%) skewX(-15deg); }
  30% { opacity: 1; }
  100% { opacity: 0; transform: translateX(100%) skewX(-15deg); }
}

.scene-transition-flare {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 10;
  opacity: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(0, 212, 255, 0.06) 30%, rgba(0, 212, 255, 0.12) 50%, rgba(0, 212, 255, 0.06) 70%, transparent 100%);
}

.scene-transition-flare.is-active {
  animation: flare-sweep 0.8s ease-out forwards;
}

/* ==========================================================================
   CURSOR-FOLLOWING LIGHT
   ========================================================================== */
.cursor-light {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 3;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
}

/* ==========================================================================
   1. HEADER / NAV
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: transparent;
  transition: background var(--transition-base), backdrop-filter var(--transition-base);
  padding: 1.25rem 0;
}

.site-header.is-scrolled {
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-glow);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.header__logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.header__logo:hover { color: var(--text-primary); }

.header__links {
  display: flex;
  gap: 2.5rem;
}

.header__links a {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  transition: color var(--transition-base);
}

.header__links a:hover { color: var(--cyan); }

.header__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.header__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-base);
}

.header__toggle.is-active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.header__toggle.is-active span:nth-child(2) { opacity: 0; }
.header__toggle.is-active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.header__nav.is-open { display: flex; }

/* ==========================================================================
   2. HERO
   ========================================================================== */
.hero {
  position: relative;
  z-index: 5;
  padding-top: 0;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  min-height: 100vh;
  padding-bottom: 15vh;
}

.hero__accent-line {
  width: 60px;
  height: 3px;
  background: var(--cyan);
  margin-bottom: 2rem;
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.4);
}

.hero__name {
  font-family: var(--font-heading);
  font-size: clamp(3.5rem, 10vw, 6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.hero__tagline {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--cyan);
  margin-bottom: 1.5rem;
  min-height: 1.5em;
}

.typing-cursor {
  animation: blink 0.8s step-end infinite;
  color: var(--cyan);
}

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

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  max-width: 480px;
}

.hero__cta {
  animation: glow-pulse 3s ease-in-out infinite;
}

/* ==========================================================================
   3. ABOUT
   ========================================================================== */
.about__content {
  max-width: 700px;
}

.about__lead {
  font-size: 1.125rem;
  color: var(--text-primary);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.about__text p {
  color: var(--text-muted);
  line-height: 1.8;
}

.about__text p:first-child {
  color: var(--text-primary);
}

.about__skills {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  margin-top: 3rem;
  padding-top: 3rem;
  border-top: 1px solid var(--border-glow);
}

.skill-group__label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.dot--cyan {
  background: var(--cyan);
  box-shadow: 0 0 8px rgba(0, 212, 255, 0.5);
}

.dot--amber {
  background: var(--amber);
  box-shadow: 0 0 8px rgba(255, 138, 0, 0.5);
}

.skill-group__list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.skill-group__list li {
  font-size: 0.9375rem;
  color: var(--text-muted);
  padding-left: 1rem;
  position: relative;
}

.skill-group__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--border-glow);
}

/* ==========================================================================
   4. CONTACT
   ========================================================================== */
.section--contact {
  background: var(--bg-surface);
  text-align: center;
}

.section--contact::before { display: none; }

.contact__inner {
  max-width: 600px;
  margin: 0 auto;
}

.contact__lead {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.contact__methods { margin-bottom: 2rem; }

.contact__email {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  color: var(--cyan);
  display: inline-block;
  margin-bottom: 1.5rem;
  transition: color var(--transition-base);
}

.contact__email:hover { color: var(--text-primary); }

.contact__social {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.contact__social a {
  color: var(--text-muted);
  transition: color var(--transition-base), transform var(--transition-base);
}

.contact__social a:hover {
  color: var(--cyan);
  transform: translateY(-2px);
}

.contact__form-btn { margin-top: 1rem; }

/* ==========================================================================
   5. FOOTER
   ========================================================================== */
.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border-glow);
  z-index: 5;
  position: relative;
}

.footer__inner { text-align: center; }

.footer__copy {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ==========================================================================
   CONTACT FORM MODAL
   ========================================================================== */
.contact-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 14, 23, 0.9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.contact-overlay.is-open { opacity: 1; visibility: visible; }
.contact-overlay[hidden] { display: none; }

.contact-modal {
  background: var(--bg-surface);
  border: 1px solid var(--border-glow);
  border-radius: 16px;
  padding: 2.5rem;
  width: 90%;
  max-width: 480px;
  position: relative;
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.contact-overlay.is-open .contact-modal { transform: translateY(0); }

.contact-close {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  transition: color var(--transition-base);
  line-height: 1;
}

.contact-close:hover { color: var(--text-primary); }

.contact-modal__heading {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.contact-field { margin-bottom: 1.25rem; }

.contact-field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.contact-field .required { color: var(--cyan); }

.contact-field input,
.contact-field textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-base);
  border: 1px solid var(--border-glow);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  transition: border-color var(--transition-base);
  outline: none;
}

.contact-field input:focus,
.contact-field textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.1);
}

.contact-field textarea {
  resize: vertical;
  min-height: 100px;
}

.contact-nav { margin-top: 1.5rem; text-align: right; }

.contact-error { margin-top: 1rem; font-size: 0.875rem; color: #ff4d4d; }

.contact-success { text-align: center; padding: 2rem 0; }

.contact-success-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.1);
  color: var(--cyan);
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}

.contact-success h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.contact-success p { color: var(--text-muted); font-size: 0.9375rem; }

.contact-close-success {
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.5rem 1.5rem;
  border-radius: 50px;
  border: 1px solid var(--border-glow);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-base);
}

.contact-close-success:hover { border-color: var(--cyan); color: var(--cyan); }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 900px) {
  :root { --section-padding: 80px; }

  .header__nav {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100vh;
    background: rgba(10, 14, 23, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 99;
  }

  .header__nav.is-open { display: flex; }

  .header__links {
    flex-direction: column;
    align-items: center;
    gap: 2rem;
  }

  .header__links a { font-size: 1.25rem; }
  .header__toggle { display: flex; z-index: 101; }
}

@media (max-width: 600px) {
  :root { --section-padding: 60px; }

  .hero__inner { padding-bottom: 10vh; }

  .about__skills { grid-template-columns: 1fr; }

  .contact-modal { padding: 1.5rem; }

  #particle-field { display: none; }
  body::before { display: none; }
}

/* ==========================================================================
   REDUCED MOTION
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-reveal], .word {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
  }

  body::after { display: none; }
}

.reduced-motion [data-reveal],
.reduced-motion .word {
  opacity: 1 !important;
  transform: none !important;
  filter: none !important;
}

.reduced-motion body::after { display: none; }