/* =========================================
   DESIGN SYSTEM — THALENTE SITHOLE PORTFOLIO
   Theme: Obsidian Tech — Dark, sharp, premium
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Mono:wght@300;400;500&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,300&display=swap');

/* ── CSS Variables ── */
:root {
  /* Colors */
  --clr-bg:         #080b10;
  --clr-bg-2:       #0d1117;
  --clr-surface:    #111620;
  --clr-surface-2:  #161c28;
  --clr-border:     rgba(255,255,255,0.07);
  --clr-border-h:   rgba(99,210,255,0.25);

  --clr-accent:     #63d2ff;
  --clr-accent-2:   #7b5cfa;
  --clr-accent-3:   #00ffb3;
  --clr-accent-glow: rgba(99,210,255,0.18);

  --clr-text:       #e8edf5;
  --clr-text-2:     #8a9bb5;
  --clr-text-3:     #4d5e78;

  /* Typography */
  --font-display:   'Syne', sans-serif;
  --font-mono:      'DM Mono', monospace;
  --font-body:      'DM Sans', sans-serif;

  /* Spacing */
  --sp-xs:  0.5rem;
  --sp-sm:  1rem;
  --sp-md:  1.75rem;
  --sp-lg:  3rem;
  --sp-xl:  5rem;

  /* Radii */
  --r-sm:  6px;
  --r-md:  12px;
  --r-lg:  20px;

  /* Transitions */
  --t-fast:   0.18s cubic-bezier(0.4,0,0.2,1);
  --t-mid:    0.35s cubic-bezier(0.4,0,0.2,1);
  --t-slow:   0.65s cubic-bezier(0.4,0,0.2,1);
  --t-spring: 0.45s cubic-bezier(0.34,1.56,0.64,1);
}

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

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

body {
  background-color: var(--clr-bg);
  color: var(--clr-text);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
  cursor: none; /* custom cursor */
}

/* ── Custom Cursor ── */
.cursor {
  position: fixed;
  width: 10px; height: 10px;
  background: var(--clr-accent);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%,-50%);
  transition: width var(--t-fast), height var(--t-fast), background var(--t-fast);
  mix-blend-mode: screen;
}
.cursor-ring {
  position: fixed;
  width: 36px; height: 36px;
  border: 1.5px solid rgba(99,210,255,0.45);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%,-50%);
  transition: width 0.22s, height 0.22s, border-color 0.22s, transform 0.12s;
}
body:hover .cursor-ring { opacity: 1; }
a:hover ~ .cursor, button:hover ~ .cursor { width:16px; height:16px; background: var(--clr-accent-3); }

/* ── Noise Overlay ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  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)' opacity='0.035'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

/* ── Grid Background ── */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(99,210,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,210,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* ── Utility ── */
.container {
  width: 90%;
  max-width: 900px;
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img, video { max-width: 100%; display: block; }

.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1rem; }

/* =========================================
   HEADER & NAV
   ========================================= */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1.1rem 0;
  transition: background var(--t-mid), backdrop-filter var(--t-mid), border-color var(--t-mid);
  border-bottom: 1px solid transparent;
}

.header.scrolled {
  background: rgba(8,11,16,0.8);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-bottom-color: var(--clr-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo placeholder (since HTML has none) */
.nav::before {
  content: 'TS_';
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--clr-accent);
  letter-spacing: 0.05em;
  text-shadow: 0 0 20px rgba(99,210,255,0.5);
  animation: glitch-logo 8s infinite;
}

@keyframes glitch-logo {
  0%,95%,100% { text-shadow: 0 0 20px rgba(99,210,255,0.5); transform: none; }
  96% { text-shadow: -2px 0 rgba(123,92,250,0.8), 2px 0 rgba(0,255,179,0.8); transform: skewX(-3deg); }
  97% { text-shadow: 2px 0 rgba(123,92,250,0.8), -2px 0 rgba(0,255,179,0.8); transform: skewX(2deg); }
  98% { text-shadow: 0 0 20px rgba(99,210,255,0.5); transform: none; }
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--sp-lg);
}

.nav__list {
  display: flex;
  gap: var(--sp-md);
  align-items: center;
}

.nav__link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-text-2);
  position: relative;
  padding: 0.2rem 0;
  transition: color var(--t-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--clr-accent);
  transition: width var(--t-mid);
  box-shadow: 0 0 8px var(--clr-accent);
}

.nav__link:hover,
.nav__link.active-link {
  color: var(--clr-text);
}

.nav__link:hover::after,
.nav__link.active-link::after {
  width: 100%;
}

.nav__close,
.nav__toggle {
  display: none;
  cursor: pointer;
  font-size: 1.4rem;
  color: var(--clr-text-2);
  transition: color var(--t-fast);
}

.nav__toggle:hover { color: var(--clr-accent); }

/* =========================================
   PROJECT HEADER BAND
   ========================================= */
.project__header {
  height: 280px;
  margin-top: 0;
  background:
    radial-gradient(ellipse 60% 70% at 50% 100%, rgba(99,210,255,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 40% 50% at 80% 50%, rgba(123,92,250,0.1) 0%, transparent 60%),
    linear-gradient(180deg, var(--clr-bg) 0%, var(--clr-bg-2) 100%);
  position: relative;
  overflow: hidden;
}

.project__header::before {
  content: 'AUTOMATION';
  position: absolute;
  bottom: -0.15em; left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 9rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(99,210,255,0.08);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}

.project__header::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--clr-accent), var(--clr-accent-2), transparent);
  opacity: 0.4;
}

/* =========================================
   MAIN CONTENT SECTION
   ========================================= */
section.container {
  padding: var(--sp-xl) 0 var(--sp-xl);
}

.project__data {
  display: grid;
  gap: var(--sp-lg);
}

/* ── Back Link ── */
.back__to-home {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  padding: 0.5rem 0;
  transition: color var(--t-fast), gap var(--t-spring);
}

.back__to-home i {
  transition: transform var(--t-spring);
}

.back__to-home:hover {
  color: var(--clr-accent);
  gap: 0.7rem;
}

.back__to-home:hover i {
  transform: translateX(-4px);
}

/* ── Page Title ── */
.project__info-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--clr-text);
  position: relative;
  padding-bottom: var(--sp-sm);
}

.project__info-title::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 48px; height: 2px;
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent-2));
  border-radius: 2px;
  box-shadow: 0 0 12px rgba(99,210,255,0.4);
}

/* ── Feature Cards ── */
.feature-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  padding: var(--sp-md) var(--sp-lg);
  position: relative;
  overflow: hidden;
  transition: border-color var(--t-mid), transform var(--t-mid), box-shadow var(--t-mid);
}

/* The subtitles and paragraphs are direct children — we wrap them visually */
.project__info-subtitle {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--clr-accent);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.65rem;
}

/* Number badge auto-generated via counter */
.project__data { counter-reset: feature-counter; }

.project__info-subtitle::before {
  counter-increment: feature-counter;
  content: counter(feature-counter, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--clr-text-3);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: 4px;
  padding: 0.15em 0.5em;
  letter-spacing: 0.05em;
  min-width: 2.2em;
  text-align: center;
}

.project__info {
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 300;
  line-height: 1.8;
  color: var(--clr-text-2);
}

/* We need to group subtitle+paragraph pairs — JS will wrap them */
.feature-block {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  padding: 1.5rem 2rem;
  position: relative;
  overflow: hidden;
  transition: border-color var(--t-mid), transform var(--t-mid), box-shadow var(--t-mid);
  /* Stagger animation base */
  opacity: 0;
  transform: translateY(28px);
}

.feature-block.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--t-slow), transform var(--t-slow), border-color var(--t-mid), box-shadow var(--t-mid);
}

.feature-block::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: linear-gradient(180deg, var(--clr-accent), var(--clr-accent-2));
  border-radius: 0 2px 2px 0;
  opacity: 0;
  transition: opacity var(--t-mid);
}

.feature-block::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 40% at 0% 50%, rgba(99,210,255,0.04) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--t-mid);
}

.feature-block:hover {
  border-color: var(--clr-border-h);
  transform: translateX(4px);
  box-shadow: 0 8px 40px rgba(0,0,0,0.35), -4px 0 0 rgba(99,210,255,0.3);
}

.feature-block:hover::before,
.feature-block:hover::after {
  opacity: 1;
}

/* ── Video Section ── */
figure {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--t-slow), transform var(--t-slow);
}

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

figure::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(123,92,250,0.08) 0%, transparent 60%);
  pointer-events: none;
}

figure video {
  width: 100%;
  max-width: 560px;
  height: auto;
  border-radius: var(--r-md);
  border: 1px solid var(--clr-border);
  box-shadow: 0 16px 60px rgba(0,0,0,0.5);
  transition: box-shadow var(--t-mid);
}

figure video:hover {
  box-shadow: 0 20px 80px rgba(0,0,0,0.6), 0 0 40px rgba(99,210,255,0.1);
}

figcaption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-3);
}

/* ── Download Button ── */
.button {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  position: relative;
  overflow: hidden;
  border-radius: var(--r-sm);
  padding: 0.9rem 2rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-bg);
  background: var(--clr-accent);
  border: none;
  cursor: pointer;
  transition: transform var(--t-spring), box-shadow var(--t-mid), background var(--t-fast);
  text-decoration: none;
  align-self: flex-start;
  opacity: 0;
  transform: translateY(20px);
}

.button.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--t-slow), transform var(--t-slow), box-shadow var(--t-mid);
}

.button::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--t-fast);
}

.button::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 0; height: 0;
  background: rgba(255,255,255,0.15);
  border-radius: 50%;
  transform: translate(-50%,-50%);
  transition: width 0.5s, height 0.5s, opacity 0.5s;
  opacity: 0;
}

.button:hover {
  background: var(--clr-accent);
  box-shadow: 0 0 30px rgba(99,210,255,0.5), 0 8px 20px rgba(0,0,0,0.3);
  transform: translateY(-2px);
}

.button:hover::before { opacity: 1; }

.button:active::after {
  width: 300px; height: 300px; opacity: 0;
}

.button h3.download {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-bg);
  margin: 0;
}

/* =========================================
   CONTACT SECTION
   ========================================= */
.contact.section {
  padding: var(--sp-xl) 0;
  position: relative;
}

.contact.section::before {
  content: '';
  position: absolute;
  top: 0; left: 50%; transform: translateX(-50%);
  width: 80%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--clr-border-h), transparent);
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--clr-text);
  margin-bottom: var(--sp-lg);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--t-slow), transform var(--t-slow);
}

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

.section__title span {
  color: var(--clr-accent);
}

.contact__container.grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--sp-lg);
  align-items: start;
}

/* ── Contact Info ── */
.contact__info {
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity var(--t-slow), transform var(--t-slow);
}

.contact__info.visible {
  opacity: 1;
  transform: translateX(0);
}

.contact__list {
  display: grid;
  gap: 0.7rem;
  margin-bottom: var(--sp-md);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  padding: 1.5rem;
}

.contact__list dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  margin-top: 0.4rem;
}

.contact__list dt:first-child { margin-top: 0; }

.contact__list dd {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--clr-text);
  padding-left: 0.5rem;
  border-left: 2px solid var(--clr-accent);
}

.contact__socials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.contact__socials-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  border: 1px solid var(--clr-border);
  border-radius: 4px;
  padding: 0.3em 0.8em;
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}

.contact__socials-link:hover {
  color: var(--clr-accent);
  border-color: var(--clr-accent);
  background: rgba(99,210,255,0.06);
}

/* ── Contact Form ── */
.contact__form {
  opacity: 0;
  transform: translateX(20px);
  transition: opacity var(--t-slow), transform var(--t-slow);
}

.contact__form.visible {
  opacity: 1;
  transform: translateX(0);
}

.contact__form-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  margin-bottom: var(--sp-md);
}

.contact__input-div {
  margin-bottom: 0.9rem;
}

.contact__input {
  width: 100%;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-sm);
  padding: 0.85rem 1.1rem;
  color: var(--clr-text);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 300;
  outline: none;
  transition: border-color var(--t-mid), box-shadow var(--t-mid), background var(--t-fast);
  resize: none;
}

.contact__input::placeholder {
  color: var(--clr-text-3);
}

.contact__input:focus {
  border-color: var(--clr-accent);
  background: var(--clr-surface-2);
  box-shadow: 0 0 0 3px rgba(99,210,255,0.1), 0 0 20px rgba(99,210,255,0.05);
}

.contact__input.textarea {
  min-height: 130px;
  line-height: 1.6;
}

.contact__message {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--clr-accent-3);
  min-height: 1.2em;
  margin-bottom: 0.75rem;
  opacity: 0;
  transition: opacity var(--t-fast);
}

.contact__message.show { opacity: 1; }

.contact .button {
  width: 100%;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--clr-accent);
  color: var(--clr-accent);
  padding: 0.9rem 1.5rem;
}

.contact .button:hover {
  background: var(--clr-accent);
  color: var(--clr-bg);
  box-shadow: 0 0 30px rgba(99,210,255,0.4);
}

.contact__button { width: 100%; }

/* ── Footer copy ── */
.footer__copy {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--clr-text-3);
  text-align: center;
  margin-top: var(--sp-md);
  padding-top: var(--sp-md);
  border-top: 1px solid var(--clr-border);
}

/* =========================================
   SCROLL REVEAL — initial state
   ========================================= */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.65s cubic-bezier(0.4,0,0.2,1), transform 0.65s cubic-bezier(0.4,0,0.2,1);
}

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

/* =========================================
   SCROLL PROGRESS BAR
   ========================================= */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent-2), var(--clr-accent-3));
  z-index: 9999;
  transition: width 0.1s linear;
  box-shadow: 0 0 10px var(--clr-accent);
}

/* =========================================
   ANIMATED GRADIENT ORBS
   ========================================= */
.orb {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(80px);
  opacity: 0.12;
  animation: orb-float 20s ease-in-out infinite;
}

.orb-1 {
  width: 500px; height: 500px;
  background: var(--clr-accent);
  top: -150px; right: -100px;
  animation-delay: 0s;
}

.orb-2 {
  width: 400px; height: 400px;
  background: var(--clr-accent-2);
  bottom: 20%; left: -120px;
  animation-delay: -7s;
}

.orb-3 {
  width: 300px; height: 300px;
  background: var(--clr-accent-3);
  bottom: 5%; right: 10%;
  animation-delay: -14s;
  opacity: 0.06;
}

@keyframes orb-float {
  0%,100% { transform: translate(0,0) scale(1); }
  33%      { transform: translate(30px,-40px) scale(1.05); }
  66%      { transform: translate(-20px,30px) scale(0.97); }
}

/* =========================================
   TYPING CURSOR
   ========================================= */
.typing-cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--clr-accent);
  margin-left: 2px;
  vertical-align: middle;
  animation: blink 1s step-end infinite;
}

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

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 768px) {
  .nav__menu {
    position: fixed;
    top: 0; right: -100%;
    width: 260px; height: 100vh;
    background: rgba(8,11,16,0.97);
    backdrop-filter: blur(24px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--sp-lg);
    border-left: 1px solid var(--clr-border);
    transition: right var(--t-mid);
    z-index: 100;
  }

  .nav__menu.show-menu { right: 0; }

  .nav__list {
    flex-direction: column;
    gap: var(--sp-md);
    text-align: center;
  }

  .nav__link { font-size: 0.95rem; }

  .nav__close {
    display: flex;
    position: absolute;
    top: 1.5rem; right: 1.5rem;
  }

  .nav__toggle {
    display: flex;
  }

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

  .contact__info {
    transform: translateY(20px);
  }

  .contact__form {
    transform: translateY(20px);
  }

  .project__header { height: 180px; }

  .feature-block { padding: 1.2rem 1.4rem; }
}

@media (max-width: 480px) {
  .container { width: 94%; }
  .project__info-title { font-size: 1.6rem; }
  section.container { padding: var(--sp-lg) 0; }
}