/* ==========================================================================
   Renn Portfolio — Design System
   ========================================================================== */

:root {
    --bg-primary: #0b0d14;
    --bg-secondary: #10131c;
    --bg-card: #161929;

    --text-primary: #eceef4;
    --text-secondary: #9499ab;
    --text-muted: #5c6378;

    --accent: #22d3ee;
    --accent-violet: #8b7cf6;
    --accent-purple: #a855f7;
    --accent-indigo: #6366f1;
    --accent-dim: rgba(34, 211, 238, 0.12);
    --gradient-brand: linear-gradient(120deg, #a855f7 0%, #6366f1 42%, #22d3ee 78%, #67e8f9 100%);
    --gradient-btn: linear-gradient(135deg, #8b7cf6 0%, #6366f1 45%, #22d3ee 100%);

    --border: #1e2436;
    --border-hover: #2e3650;

    --error: #ff4d4d;
    --success: #00c896;

    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-body: 'Inter', system-ui, sans-serif;

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-24: 6rem;
    --space-32: 8rem;

    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 600ms ease;

    --navbar-height: 3.5rem;
}

/* --------------------------------------------------------------------------
   Reset
   -------------------------------------------------------------------------- */

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

/* --------------------------------------------------------------------------
   Base typography
   -------------------------------------------------------------------------- */

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

body {
    position: relative;
    font-family: var(--font-body);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    min-height: 100vh;
}

body.loading {
    overflow: hidden;
}

/* --------------------------------------------------------------------------
   Global background
   -------------------------------------------------------------------------- */

#bg-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.85;
}

#grid-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(139, 124, 246, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(34, 211, 238, 0.035) 1px, transparent 1px);
    background-size: 48px 48px;
    animation: grid-move 30s linear infinite;
    mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black 20%, transparent 100%);
}

@keyframes grid-move {
    0% {
        background-position: 0 0;
    }

    100% {
        background-position: 50px 50px;
    }
}

.particle {
    position: fixed;
    bottom: 0;
    z-index: 0;
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--accent);
    opacity: 0.04;
    pointer-events: none;
    animation: float-particle linear infinite;
    user-select: none;
}

@keyframes float-particle {
    0% {
        transform: translateY(100vh);
        opacity: 0;
    }

    10% {
        opacity: 0.04;
    }

    90% {
        opacity: 0.04;
    }

    100% {
        transform: translateY(-100px);
        opacity: 0;
    }
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */

.main-content {
    position: relative;
    z-index: 1;
    padding-top: var(--navbar-height);
    min-height: calc(100vh - var(--navbar-height));
}

section[id] {
    scroll-margin-top: var(--navbar-height);
}

.page-section {
    position: relative;
    z-index: 1;
    max-width: 72rem;
    margin: 0 auto;
    padding: var(--space-8) var(--space-4);
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

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

/* --------------------------------------------------------------------------
   Navbar
   -------------------------------------------------------------------------- */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  position: relative;
  z-index: 1;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-3) clamp(1rem, 3.5vw, 2.75rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

/* Logo */
.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
}
.nav-logo:hover { opacity: 0.8; }

.logo-bracket {
  color: var(--accent);
  font-weight: 400;
}
.logo-main {
  color: var(--text-primary);
  font-weight: 700;
}
.logo-accent {
  color: var(--accent);
  font-weight: 700;
}

/* Nav links desktop */
.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 2px;
  list-style: none;
  margin: 0 0 0 auto;
  padding: 0;
  flex-shrink: 0;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 4px;
  transition: color var(--transition-fast),
              background var(--transition-fast);
  white-space: nowrap;
}

.nav-link svg {
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.04);
}
.nav-link:hover svg { opacity: 1; }

.nav-link.active {
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
  border-radius: 0;
  padding-bottom: calc(var(--space-2) - 2px);
}
.nav-link.active svg { opacity: 1; color: var(--accent); }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  z-index: 101;
  flex-shrink: 0;
  margin-left: auto;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-normal),
              opacity var(--transition-normal);
}

/* Hamburger → X saat open */
.hamburger.open .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger.open .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile styles */
@media (max-width: 768px) {
  .nav-container {
    display: flex;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
  }

  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 75vw;
    max-width: 300px;
    height: 100vh;
    background: rgba(10, 10, 10, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    padding: 5rem var(--space-8) var(--space-8);
    gap: var(--space-2);
    border-left: 1px solid var(--border);
    transition: right var(--transition-normal);
    z-index: 100;
    margin-left: 0;
    justify-content: flex-start;
  }

  .nav-links.open { right: 0; }

  .nav-link {
    font-size: 1rem;
    padding: var(--space-3) var(--space-4);
    width: 100%;
    max-width: none;
  }

  /* Overlay saat menu mobile open */
  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 99;
  }
  .nav-overlay.open { display: block; }
}

@media (min-width: 769px) and (max-width: 1180px) {
  .nav-link {
    font-size: 0.7rem;
    padding: var(--space-2) 6px;
    gap: 4px;
  }

  .nav-link svg {
    width: 12px;
    height: 12px;
  }
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border);
    background-color: var(--bg-secondary);
    padding: var(--space-6) var(--space-4);
    text-align: center;
}

.footer__text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

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

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero-section {
    min-height: calc(100vh - var(--navbar-height));
    min-height: calc(100dvh - var(--navbar-height));
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: var(--space-16) var(--space-8);
    z-index: 1;
    box-sizing: border-box;
}

.hero-section::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse 520px 380px at 10% 15%, rgba(168, 85, 247, 0.08), transparent 70%),
        radial-gradient(ellipse 480px 360px at 90% 80%, rgba(34, 211, 238, 0.06), transparent 70%);
}

.hero-greeting {
    font-family: var(--font-body);
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: var(--space-3);
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.35rem;
}

.hero-greeting-label {
    color: var(--accent-violet);
    font-weight: 500;
}

.hero-name {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: clamp(1.05rem, 2.8vw, 1.35rem);
    background: var(--gradient-brand);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-flow 4s linear infinite;
}

.hero-focus-typed {
    display: inline;
    color: #00e5ff;
}

.hero-focus-typed .typed-cursor {
    display: inline;
    margin-left: 1px;
    color: var(--accent);
    opacity: 1;
    font-weight: 400;
}

.hero-content {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-family: var(--font-mono);
    font-size: clamp(1.35rem, 3.2vw, 3rem);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.code-keyword { color: var(--accent-violet); }
.code-equals  { color: var(--text-secondary); }
.code-value   { color: var(--text-primary); }
.code-semicolon { color: var(--text-muted); }

.gradient-text {
    background: linear-gradient(
        270deg,
        #00e5ff, #0099bb, #004466,
        #00e5ff, #88ffee, #00e5ff
    );
    background-size: 400% 400%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: cosmic-flow 8s ease infinite;
}

.name-float {
    background: linear-gradient(
        90deg,
        #e8e8e8 0%,
        #00e5ff 30%,
        #88ccdd 50%,
        #e8e8e8 70%,
        #aaddee 100%
    );
    background-size: 300% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: name-float 6s ease-in-out infinite;
}

@keyframes cosmic-flow {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes name-float {
    0%   { background-position: 0% center; }
    50%  { background-position: 150% center; }
    100% { background-position: 0% center; }
}

@keyframes gradient-flow {
    0%   { background-position: 0% center; }
    100% { background-position: 200% center; }
}

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

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--accent);
    margin-bottom: var(--space-6);
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.2rem;
}

.hero-role-static {
    color: #00e5ff;
}

.code-comment { color: var(--text-muted); }

.hero-desc {
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 480px;
    margin-bottom: var(--space-8);
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-8);
    background: var(--gradient-btn);
    color: #0b0d14;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 999px;
    text-decoration: none;
    border: 1px solid transparent;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 24px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover {
    background: transparent;
    color: var(--accent);
    border-color: var(--accent-violet);
    box-shadow: 0 0 24px rgba(139, 124, 246, 0.2);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-8);
    background: transparent;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    border: 1px solid var(--border-hover);
    border-radius: 999px;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.btn-secondary:hover {
    border-color: var(--accent-violet);
    color: var(--accent-violet);
    box-shadow: 0 0 20px rgba(139, 124, 246, 0.12);
}

.hero-right {
    display: flex;
    justify-content: center;
    align-items: center;
}

.orbit-container {
    position: relative;
    width: 380px;
    height: 380px;
}

.sun-aura {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: radial-gradient(
        ellipse at center,
        rgba(0, 229, 255, 0.12) 0%,
        rgba(0, 180, 220, 0.06) 35%,
        rgba(0, 100, 150, 0.03) 60%,
        transparent 75%
    );
    animation: sun-pulse 4s ease-in-out infinite;
    pointer-events: none;
    z-index: 1;
}

@keyframes sun-pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.8;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.15);
        opacity: 1;
    }
}

.profile-orbit-wrapper {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 220px;
    height: 220px;
    border-radius: 50%;
    z-index: 2;
    transform-style: preserve-3d;
    perspective: 800px;
    cursor: pointer;
}

.profile-orbit-inner {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    overflow: hidden;
    position: relative;
    border: 2px solid rgba(0, 229, 255, 0.3);
    transition: transform 0.1s ease,
                border-color var(--transition-normal),
                box-shadow var(--transition-normal);
    transform-style: preserve-3d;
}

.profile-orbit-wrapper:hover .profile-orbit-inner {
    border-color: rgba(0, 229, 255, 0.7);
    box-shadow:
        0 0 30px rgba(0, 229, 255, 0.3),
        0 0 60px rgba(0, 229, 255, 0.1);
}

.profile-orbit-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
    border-radius: 50%;
}

.profile-orbit-glow {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: radial-gradient(
        circle at 30% 30%,
        rgba(0, 229, 255, 0.15),
        transparent 60%
    );
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.profile-orbit-wrapper:hover .profile-orbit-glow {
    opacity: 1;
}

.planet {
    position: absolute;
    cursor: default;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: filter var(--transition-normal);
}

.planet svg {
    display: block;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.5));
    transition: filter var(--transition-normal),
                transform var(--transition-normal);
}

.planet:hover svg {
    filter:
        drop-shadow(0 0 10px rgba(0, 229, 255, 0.4))
        brightness(1.25);
    transform: scale(1.1);
}

.planet-label {
    margin-top: var(--space-1);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-secondary);
    white-space: nowrap;
    letter-spacing: 0.02em;
}

.planet-jupiter {
    top: -28px;
    left: 50%;
    transform: translateX(-50%);
    animation: planet-float-top 3.5s ease-in-out infinite;
}

.planet-earth {
    bottom: 12px;
    left: -24px;
    animation: planet-float-side 3.5s ease-in-out infinite 1.2s;
}

.planet-saturn {
    bottom: 12px;
    right: -36px;
    animation: planet-float-side 3.5s ease-in-out infinite 0.6s;
}

@keyframes planet-float-top {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50%       { transform: translateX(-50%) translateY(-12px); }
}

@keyframes planet-float-side {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(-10px); }
}

.code-tag { font-family: var(--font-mono); color: var(--accent); }

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    border: 1px solid var(--accent);
    border-radius: 4px;
    cursor: pointer;
    transition: background-color var(--transition-normal),
                color var(--transition-normal),
                border-color var(--transition-normal);
}

.btn--primary {
    background-color: var(--accent-dim);
    color: var(--accent);
}

.btn--secondary {
    background-color: transparent;
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.btn--primary:hover,
.btn--secondary:hover {
    background-color: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
}

/* --------------------------------------------------------------------------
   Section headings
   -------------------------------------------------------------------------- */

h1.section-heading,
h2.section-heading {
    font-family: var(--font-mono);
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 500;
    border-bottom: 1px solid var(--border);
    padding-bottom: var(--space-2);
    margin-bottom: var(--space-8);
}

.section-heading__accent {
    color: var(--accent);
}

div.section-heading {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-16);
}

.section-number {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    color: var(--accent);
    font-weight: 700;
}

div.section-heading h2 {
    font-family: var(--font-mono);
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--text-primary);
    white-space: nowrap;
}

.section-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(
        to right,
        var(--accent),
        transparent
    );
    opacity: 0.3;
}

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */

.about-section,
.skills-section,
.experience-section,
.projects-section,
.blog-section,
.contact-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-24) var(--space-8);
    position: relative;
    z-index: 1;
    box-sizing: border-box;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    overflow: visible;
}

.section-placeholder {
    color: var(--text-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: start;
}

.about-bio {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-4);
}

.github-link {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent);
    text-decoration: none;
    margin: var(--space-4) 0 var(--space-8);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
}

.github-link:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.stat-card {
    padding: var(--space-6) var(--space-4);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    text-align: center;
    transition: border-color var(--transition-normal);
}

.stat-card:hover { border-color: var(--accent); }

.stat-number {
    display: block;
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    margin-bottom: var(--space-2);
}

.glitch-counter {
    font-family: var(--font-mono);
    display: inline-block;
    min-width: 3ch;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.code-block {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.code-block-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-dot.red    { background: #ff5f57; }
.code-dot.yellow { background: #ffbd2e; }
.code-dot.green  { background: #28ca41; }

.code-block-filename {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-left: var(--space-2);
}

.code-block-body {
    padding: var(--space-6);
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
    overflow-x: auto;
}

.cb-keyword { color: var(--accent); }
.cb-var     { color: #e8e8e8; }
.cb-key     { color: #7dd3fc; }
.cb-str     { color: #86efac; }
.cb-comment { color: var(--text-muted); }

/* --------------------------------------------------------------------------
   Skills
   -------------------------------------------------------------------------- */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

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

@media (max-width: 768px) {
    .skills-grid { grid-template-columns: 1fr; }
}

.skill-category-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: var(--space-6);
    transition: border-color var(--transition-normal);
}

.skill-category-card:hover {
    border-color: var(--accent);
}

.skill-category-title {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent);
    margin-bottom: var(--space-6);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.skill-item {
    margin-bottom: var(--space-4);
}

.skill-item:last-child {
    margin-bottom: 0;
}

.skill-item-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-2);
}

.skill-name {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-primary);
}

.skill-percent {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
}

.skill-bar-track {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

.skill-bar-fill {
    height: 100%;
    background: linear-gradient(
        to right,
        var(--accent),
        rgba(0, 229, 255, 0.5)
    );
    border-radius: 2px;
    width: 0%;
}

/* --------------------------------------------------------------------------
   Experience timeline
   -------------------------------------------------------------------------- */

.timeline {
    position: relative;
    padding-left: var(--space-8);
    height: auto;
    display: flex;
    flex-direction: column;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(
        to bottom,
        var(--accent),
        var(--border)
    );
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-8);
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: calc(-1 * var(--space-8) + 2px);
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border);
    border: 2px solid var(--bg-primary);
}

.timeline-dot.active {
    background: var(--accent);
    box-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
}

.timeline-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: var(--space-6);
    transition: border-color var(--transition-normal);
}

.timeline-card:hover { border-color: var(--accent); }

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-2);
}

.timeline-period {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent);
}

.timeline-badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 2px 8px;
    background: rgba(0, 229, 255, 0.1);
    border: 1px solid var(--accent);
    border-radius: 20px;
    color: var(--accent);
}

.timeline-role {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.timeline-company {
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: var(--space-3);
}

.timeline-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Projects (homepage inline)
   -------------------------------------------------------------------------- */

.projects-section .projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 1fr;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

@media (max-width: 1024px) {
    .projects-section .projects-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .projects-section .projects-grid { grid-template-columns: 1fr; }
}

.projects-section .project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: var(--space-6);
    height: auto;
    min-height: 220px;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    transition: border-color var(--transition-normal),
                transform var(--transition-normal);
}

.projects-section .project-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.project-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.project-icon {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    color: var(--accent);
}

.project-links {
    display: flex;
    gap: var(--space-3);
}

.project-link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.project-link:hover,
.project-link.accent { color: var(--accent); }

.projects-section .project-title {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-primary);
}

.projects-section .project-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.tech-chip {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 2px var(--space-2);
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 3px;
    color: var(--text-secondary);
}

.skill-chip {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: var(--space-2) var(--space-4);
    color: var(--text-primary);
    transition: border-color var(--transition-normal),
                color var(--transition-normal);
}

.skill-chip:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.section-footer {
    text-align: center;
    margin-top: var(--space-8);
}

/* --------------------------------------------------------------------------
   Blog (homepage inline)
   -------------------------------------------------------------------------- */

.blog-section .blog-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    list-style: none;
    perspective: 1200px;
}

.blog-section .blog-item {
    display: block;
    padding: var(--space-6);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    text-decoration: none;
    transition: border-color var(--transition-normal),
                transform var(--transition-normal);
}

.blog-section .blog-item:hover {
    border-color: var(--accent);
    transform: translateX(4px);
}

.blog-item-meta {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-2);
}

.blog-date,
.blog-read {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
}

.blog-section .blog-title {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
    transition: color var(--transition-fast);
}

.blog-section .blog-item:hover .blog-title { color: var(--accent); }

.blog-section .blog-excerpt {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Contact (homepage inline)
   -------------------------------------------------------------------------- */

.contact-section {
    align-items: flex-start;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-16);
    align-items: start;
}

@media (max-width: 768px) {
    .contact-grid { grid-template-columns: 1fr; }
}

.contact-desc {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-8);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.contact-info-item {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    padding: var(--space-3);
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: border-color var(--transition-fast);
}

.contact-info-item:hover { border-color: var(--accent); }

.contact-info-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.contact-info-value {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent);
}

.success-message {
    color: var(--success);
    border: 1px solid var(--success);
    padding: var(--space-4);
    border-radius: 6px;
    margin-bottom: var(--space-6);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

#contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.form-label {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.form-optional {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.form-input {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    padding: var(--space-3) var(--space-4);
    transition: border-color var(--transition-fast);
    width: 100%;
}

.form-textarea {
    min-height: 8rem;
    resize: vertical;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
}

.form-input.error {
    border-color: var(--error);
}

.form-hint {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.form-error {
    color: var(--error);
    font-size: 0.8rem;
    display: none;
}

.form-error:not(:empty) {
    display: block;
}

/* --------------------------------------------------------------------------
   Projects (list/detail pages)
   -------------------------------------------------------------------------- */

.project-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

.project-card {
    position: relative;
    z-index: 1;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: var(--space-6);
    transition: border-color var(--transition-normal);
}

.project-card:hover {
    border-color: var(--accent);
}

.project-card__title {
    font-family: var(--font-mono);
    font-size: 1.125rem;
    margin-bottom: var(--space-4);
}

.project-card__title a {
    color: var(--text-primary);
}

.project-card__title a:hover {
    color: var(--accent);
}

.project-card__tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.project-card__description {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--space-4);
}

.project-card__links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
}

.project-card__link {
    color: var(--accent);
}

.project-detail__title {
    font-family: var(--font-mono);
    font-size: clamp(1.5rem, 4vw, 2rem);
    margin-bottom: var(--space-6);
}

.project-detail__tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
}

.project-detail__description {
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    line-height: 1.7;
}

.project-detail__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.back-link {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

.back-link:hover {
    color: var(--accent);
}

.empty-state {
    font-family: var(--font-mono);
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* --------------------------------------------------------------------------
   Blog
   -------------------------------------------------------------------------- */

.blog-list {
    list-style: none;
}

.blog-list__item {
    border-bottom: 1px solid var(--border);
    padding: var(--space-6) 0;
}

.blog-list__item:first-child {
    padding-top: 0;
}

.blog-list__title {
    font-family: var(--font-mono);
    font-size: 1.125rem;
    margin-bottom: var(--space-2);
}

.blog-list__title a {
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.blog-list__item:hover .blog-list__title a {
    color: var(--accent);
}

.blog-list__meta,
.blog-detail__meta {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-3);
}

.blog-list__reading-time,
.blog-detail__reading-time {
    margin-left: var(--space-4);
}

.blog-list__excerpt {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.blog-detail__title {
    font-family: var(--font-mono);
    font-size: clamp(1.5rem, 4vw, 2rem);
    margin-bottom: var(--space-4);
}

.blog-detail__body {
    color: var(--text-secondary);
    line-height: 1.7;
}

.blog-detail__body h1,
.blog-detail__body h2,
.blog-detail__body h3 {
    font-family: var(--font-mono);
    color: var(--text-primary);
    margin: var(--space-6) 0 var(--space-4);
}

.blog-detail__body p {
    margin-bottom: var(--space-4);
}

.blog-detail__body code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background-color: var(--bg-card);
    padding: 0.1em 0.35em;
    border-radius: 3px;
}

.blog-detail__body pre {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: var(--space-4);
    overflow-x: auto;
    margin-bottom: var(--space-4);
}

.blog-detail__body pre code {
    background: none;
    padding: 0;
}

/* --------------------------------------------------------------------------
   Contact form
   -------------------------------------------------------------------------- */

.contact-success {
    color: var(--success);
    border: 1px solid var(--success);
    padding: var(--space-4);
    border-radius: 4px;
    margin-bottom: var(--space-6);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.contact-form {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    max-width: 36rem;
    margin-bottom: var(--space-8);
}

.contact-form__field {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.contact-form__label {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.contact-form__optional {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

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

.contact-form input,
.contact-form textarea {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    padding: var(--space-3) var(--space-4);
    transition: border-color var(--transition-fast);
    width: 100%;
}

.contact-form textarea {
    min-height: 8rem;
    resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.contact-form input.error,
.contact-form textarea.error {
    border-color: var(--error);
}

.contact-form input.error:focus,
.contact-form textarea.error:focus {
    border-color: var(--error);
}

.field-error {
    color: var(--error);
    font-size: 0.8rem;
    display: none;
}

.field-error:not(:empty) {
    display: block;
}

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

.contact-form__submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.contact-form__submit:disabled:hover {
    background-color: var(--accent-dim);
    color: var(--accent);
    border-color: var(--accent);
}

.contact-form__alt {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Scroll-triggered section animations — repeated [data-animate] system
   -------------------------------------------------------------------------- */

[data-animate] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease, filter 0.6s ease;
}

[data-animate].in-view {
    opacity: 1;
}

[data-animate="blur"] {
    filter: blur(8px);
    transform: translateY(15px);
}

[data-animate="blur"].in-view {
    filter: blur(0px);
    transform: translateY(0);
}

[data-animate="slide-up"] {
    transform: translateY(30px);
}

[data-animate="slide-up"].in-view {
    transform: translateY(0);
}

[data-animate="fade-stagger"] {
    transform: translateX(-20px);
}

[data-animate="fade-stagger"].in-view {
    transform: translateX(0);
}

[data-animate="scale-pop"] {
    transform: scale(0.92);
}

[data-animate="scale-pop"].in-view {
    transform: scale(1);
}

[data-animate="fade-left"] {
    transform: translateX(-30px);
}

[data-animate="fade-left"].in-view {
    transform: translateX(0);
}

[data-animate="fade-right"] {
    transform: translateX(30px);
}

[data-animate="fade-right"].in-view {
    transform: translateX(0);
}

@media (prefers-reduced-motion: reduce) {
    [data-animate] {
        opacity: 1 !important;
        transform: none !important;
        filter: none !important;
        transition: none !important;
    }
}

/* Legacy anim classes — contact form rows */
.anim-form-row {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.anim-form-row.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Legacy — keep for other pages if used */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 600ms ease, transform 600ms ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --------------------------------------------------------------------------
   Scroll to top
   -------------------------------------------------------------------------- */

.scroll-top {
    position: fixed;
    right: var(--space-4);
    bottom: var(--space-4);
    z-index: 90;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background-color: var(--bg-card);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 1.125rem;
    line-height: 1;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal),
                visibility var(--transition-normal),
                border-color var(--transition-fast);
}

.scroll-top--visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    border-color: var(--accent);
}

/* --------------------------------------------------------------------------
   Responsive — mobile-first
   -------------------------------------------------------------------------- */

@media (max-width: 767px) {
    .page-section {
        padding: var(--space-8) var(--space-4);
    }

    .hero-section {
        padding: var(--space-8) var(--space-4);
        min-height: auto;
        padding-top: var(--space-12);
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
        text-align: center;
    }

    .hero-left {
        order: 2;
    }

    .hero-right {
        order: 1;
        display: flex;
        justify-content: center;
    }

    .hero-greeting {
        justify-content: center;
    }

    .hero-title {
        font-size: clamp(1.15rem, 4.5vw, 1.65rem);
        justify-content: center;
    }

    .hero-desc {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .orbit-container {
        width: 260px;
        height: 260px;
    }

    .profile-orbit-wrapper {
        width: 150px;
        height: 150px;
    }

    .sun-aura {
        width: 200px;
        height: 200px;
    }

    .planet-jupiter {
        top: -18px;
    }

    .planet-earth {
        bottom: 20px;
        left: -8px;
    }

    .planet-saturn {
        bottom: 20px;
        right: -16px;
    }

    .planet-label {
        font-size: 0.6rem;
    }

    .about-section,
    .skills-section,
    .experience-section,
    .projects-section,
    .blog-section,
    .contact-section {
        min-height: auto;
        align-items: stretch;
        padding: var(--space-16) var(--space-6);
    }

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

    div.section-heading .section-line {
        display: none;
    }

    .contact-form {
        max-width: 100%;
    }
}

@media (min-width: 768px) {
    .page-section {
        padding: var(--space-12) var(--space-8);
    }

    .project-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* --------------------------------------------------------------------------
   Loading screen
   -------------------------------------------------------------------------- */

#loading-screen {
    position: fixed;
    inset: 0;
    background: #050508;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

#loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
}

.loading-code {
    font-family: var(--font-mono);
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    text-align: left;
    margin: 0;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-bar-wrapper {
    width: 200px;
    height: 2px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

.loading-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(
        to right,
        var(--accent),
        rgba(0, 229, 255, 0.5)
    );
    border-radius: 2px;
    transition: width 0.1s ease;
}

.loading-percent {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .hamburger {
        animation: none;
    }

    .nav-links {
        transition: none;
    }

    .nav-overlay {
        transition: none;
    }

    #grid-bg {
        animation: none;
    }

    #bg-canvas {
        display: none;
    }

    .particle {
        display: none;
    }

    .planet {
        animation: none;
    }

    .profile-orbit-inner {
        transition: none;
    }

    .gradient-text,
    .name-float {
        animation: none;
    }

    .anim-form-row,
    .fade-in {
        opacity: 1;
        transform: none;
        filter: none;
        transition: none;
    }

    .skill-bar-fill {
        transition: none;
    }
}