/* ========================================
   RIAS IT PORTFOLIO — Futuristic Dark Theme
   ======================================== */

/* ----------------------------------------
   1. CSS CUSTOM PROPERTIES
   ---------------------------------------- */
:root {
  /* Colors */
  --bg-primary: #06060e;
  --bg-secondary: #0d0d1a;
  --bg-card: rgba(13, 13, 26, 0.75);
  --bg-glass: rgba(13, 13, 26, 0.55);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 229, 255, 0.25);

  --neon-cyan: #00e5ff;
  --neon-purple: #b24dff;
  --neon-pink: #ff3d8f;
  --neon-green: #39ff14;

  --text-primary: #e0e0f0;
  --text-secondary: #7a7a9a;
  --text-muted: #4a4a6a;

  --gradient-accent: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  --gradient-card: linear-gradient(135deg, rgba(0, 229, 255, 0.05), rgba(178, 77, 255, 0.05));

  /* Typography */
  --font-heading: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;

  /* Spacing */
  --nav-height: 72px;
  --section-pad-x: clamp(1.5rem, 5vw, 6rem);
  --section-pad-y: clamp(4rem, 10vh, 8rem);

  /* Transitions */
  --ease-smooth: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-fast: 0.25s;
  --duration-normal: 0.5s;
  --duration-slow: 0.8s;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

/* ----------------------------------------
   3. TYPOGRAPHY
   ---------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.section-label {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--neon-cyan);
  margin-bottom: 0.75rem;
  opacity: 0.9;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: 1.5rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* ----------------------------------------
   4. NAVIGATION
   ---------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--section-pad-x);
  transition: background var(--duration-normal) var(--ease-smooth),
              border-color var(--duration-normal) var(--ease-smooth),
              backdrop-filter var(--duration-normal) var(--ease-smooth);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border-glass);
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--duration-fast) ease;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: width var(--duration-normal) var(--ease-smooth);
}

.nav-link:hover,
.nav-link:focus {
  color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link:focus::after {
  width: 100%;
}

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

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--duration-fast) ease, opacity var(--duration-fast) ease;
}

/* ----------------------------------------
   5. CONTINUOUS PARALLAX SECTION
   ---------------------------------------- */
.continuous-parallax {
  position: relative;
  width: 100%;
  /* Height is set inline in HTML to allow for 600 frames of scrolling */
}

.frame-sticky {
  position: sticky;
  top: 0;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.frame-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  will-change: transform;
}

.frame-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg,
      rgba(6, 6, 14, 0.6) 0%,
      rgba(6, 6, 14, 0.1) 40%,
      rgba(6, 6, 14, 0.1) 60%,
      rgba(6, 6, 14, 0.7) 100%
    ),
    linear-gradient(90deg,
      rgba(6, 6, 14, 0.5) 0%,
      transparent 50%
    );
  pointer-events: none;
}

.frame-content {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.text-overlay {
  position: absolute;
  top: calc(var(--nav-height) + 3rem);
  left: var(--section-pad-x);
  max-width: 700px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s var(--ease-smooth),
              transform 0.4s var(--ease-smooth);
  pointer-events: none;
}

.text-overlay.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.frame-number {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--neon-cyan);
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
}

.frame-title {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  color: #ffffff;
  text-shadow:
    0 0 40px rgba(0, 229, 255, 0.3),
    0 0 80px rgba(0, 229, 255, 0.1);
}

.frame-description {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(224, 224, 240, 0.8);
  margin-top: 1.5rem;
  max-width: 500px;
  line-height: 1.7;
}

/* Scroll indicator on hero */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  z-index: 2;
  opacity: 0.6;
  animation: scrollBounce 2s ease-in-out infinite;
}

.scroll-indicator-text {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.scroll-indicator-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--neon-cyan), transparent);
}

/* Section spacer between frame sections */
.section-spacer {
  height: 15vh;
  background: var(--bg-primary);
  position: relative;
}

.section-spacer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 100%;
  background: linear-gradient(to bottom, var(--border-glass), transparent);
}

/* ----------------------------------------
   6. CONTENT SECTIONS
   ---------------------------------------- */
.content-section {
  position: relative;
  padding: var(--section-pad-y) var(--section-pad-x);
  background: var(--bg-primary);
  overflow: hidden;
}

.content-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-glass), transparent);
}

.section-header {
  text-align: center;
  margin-bottom: clamp(3rem, 6vh, 5rem);
}

/* ----------------------------------------
   7. PORTFOLIO GRID
   ---------------------------------------- */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.portfolio-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-smooth),
              border-color var(--duration-normal) var(--ease-smooth),
              box-shadow var(--duration-normal) var(--ease-smooth);
  /* Scroll reveal */
  opacity: 0;
  transform: translateY(40px);
}

.portfolio-card.revealed {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--duration-slow) var(--ease-smooth),
              transform var(--duration-slow) var(--ease-smooth);
}

.portfolio-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.4),
    0 0 30px rgba(0, 229, 255, 0.05);
}

.card-thumbnail {
  width: 100%;
  height: 200px;
  position: relative;
  overflow: hidden;
}

.card-thumbnail-bg {
  width: 100%;
  height: 100%;
  transition: transform var(--duration-normal) var(--ease-smooth);
}

.portfolio-card:hover .card-thumbnail-bg {
  transform: scale(1.05);
}

/* Gradient thumbnails for project cards */
.card-thumb-web { background: linear-gradient(135deg, #0d47a1, #00e5ff, #1a237e); }
.card-thumb-app { background: linear-gradient(135deg, #4a148c, #b24dff, #7c4dff); }
.card-thumb-iot { background: linear-gradient(135deg, #004d40, #39ff14, #00695c); }
.card-thumb-seo { background: linear-gradient(135deg, #bf360c, #ff3d8f, #e65100); }

.card-category {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 12px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  border-radius: 100px;
  color: var(--neon-cyan);
}

.card-body {
  padding: 1.25rem 1.5rem 1.5rem;
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

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

.card-tag {
  font-size: 0.7rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 100px;
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  transition: border-color var(--duration-fast) ease, color var(--duration-fast) ease;
}

.portfolio-card:hover .card-tag {
  border-color: rgba(0, 229, 255, 0.15);
  color: var(--text-secondary);
}

/* ----------------------------------------
   8. SKILLS SECTION
   ---------------------------------------- */
.skills-container {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}

.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 2rem;
  transition: border-color var(--duration-normal) var(--ease-smooth),
              box-shadow var(--duration-normal) var(--ease-smooth);
  /* Scroll reveal */
  opacity: 0;
  transform: translateY(30px);
}

.skill-group.revealed {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--duration-slow) var(--ease-smooth),
              transform var(--duration-slow) var(--ease-smooth);
}

.skill-group:hover {
  border-color: var(--border-glow);
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.06);
}

.skill-group-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  margin-bottom: 1.25rem;
  font-size: 1.25rem;
}

.skill-group-icon.icon-languages { background: linear-gradient(135deg, rgba(0, 229, 255, 0.15), rgba(0, 229, 255, 0.05)); color: var(--neon-cyan); }
.skill-group-icon.icon-frameworks { background: linear-gradient(135deg, rgba(178, 77, 255, 0.15), rgba(178, 77, 255, 0.05)); color: var(--neon-purple); }
.skill-group-icon.icon-tools { background: linear-gradient(135deg, rgba(255, 61, 143, 0.15), rgba(255, 61, 143, 0.05)); color: var(--neon-pink); }
.skill-group-icon.icon-platforms { background: linear-gradient(135deg, rgba(57, 255, 20, 0.15), rgba(57, 255, 20, 0.05)); color: var(--neon-green); }

.skill-group-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.skill-list {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.skill-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.875rem;
}

.skill-name {
  color: var(--text-secondary);
}

.skill-bar-track {
  width: 60%;
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 100px;
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  border-radius: 100px;
  background: var(--gradient-accent);
  width: 0;
  transition: width 1.2s var(--ease-smooth);
}

.skill-group.revealed .skill-bar-fill {
  /* Width set via inline style */
}

/* ----------------------------------------
   9. CONTACT SECTION
   ---------------------------------------- */
.contact-container {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.contact-cta {
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2rem;
  line-height: 1.4;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 2.5rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.75rem;
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  background: var(--bg-card);
  color: var(--text-secondary);
  transition: all var(--duration-normal) var(--ease-smooth);
}

.contact-link:hover {
  border-color: var(--border-glow);
  color: var(--neon-cyan);
  background: rgba(0, 229, 255, 0.04);
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.08);
  transform: translateY(-2px);
}

.contact-link-icon {
  font-size: 1.125rem;
  display: flex;
  align-items: center;
}

.contact-divider {
  width: 60px;
  height: 2px;
  background: var(--gradient-accent);
  margin: 2rem auto;
  border-radius: 100px;
}

.contact-email {
  font-size: 1rem;
  color: var(--text-secondary);
}

/* ----------------------------------------
   10. FOOTER
   ---------------------------------------- */
.footer {
  padding: 2rem var(--section-pad-x);
  text-align: center;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-glass);
}

.footer-text {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-accent {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 600;
}

/* ----------------------------------------
   11. ANIMATIONS & EFFECTS
   ---------------------------------------- */
@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 20px rgba(0, 229, 255, 0.1); }
  50% { box-shadow: 0 0 40px rgba(0, 229, 255, 0.2); }
}

/* Ambient floating dots */
.ambient-dot {
  position: absolute;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: var(--neon-cyan);
  opacity: 0;
  animation: floatDot 8s ease-in-out infinite;
  pointer-events: none;
}

@keyframes floatDot {
  0% { opacity: 0; transform: translateY(0); }
  20% { opacity: 0.4; }
  80% { opacity: 0.4; }
  100% { opacity: 0; transform: translateY(-120px); }
}

/* Loading screen */
.loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1.5rem;
  transition: opacity 0.6s var(--ease-smooth);
}

.loader.hidden {
  opacity: 0;
  pointer-events: none;
}

.loader-ring {
  width: 48px;
  height: 48px;
  border: 2px solid var(--border-glass);
  border-top-color: var(--neon-cyan);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loader-text {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.loader-progress {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--neon-cyan);
  margin-top: -0.5rem;
  font-variant-numeric: tabular-nums;
}

/* ----------------------------------------
   12. RESPONSIVE
   ---------------------------------------- */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    padding: 1rem var(--section-pad-x);
    gap: 0;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-link {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-glass);
  }

  .nav-link::after {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .text-overlay {
    top: auto;
    bottom: 4rem; /* Move text to bottom to show background at top */
  }

  .frame-title {
    font-size: clamp(2rem, 10vw, 2.5rem); /* Slightly smaller on mobile */
  }

  .frame-description {
    font-size: 0.85rem; /* Smaller text */
    margin-top: 0.75rem;
  }

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

  .skills-container {
    grid-template-columns: 1fr;
  }

  .contact-links {
    flex-direction: column;
    align-items: center;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ----------------------------------------
   13. SCROLLBAR
   ---------------------------------------- */
::-webkit-scrollbar {
  width: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 100px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Firefox */
html {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.1) var(--bg-primary);
}