/* ============================================================
   CIHAN ERTAV — DIGITAL EMPIRE DESIGN SYSTEM
   ============================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@300;400;500;700&family=Outfit:wght@300;400;500;600;700;800;900&display=swap');

/* ── CSS Custom Properties ── */
:root {
  /* Colors */
  --bg-primary: #07070d;
  --bg-secondary: #0d0d18;
  --bg-tertiary: #141425;
  --bg-card: rgba(15, 15, 30, 0.7);
  --bg-glass: rgba(15, 15, 35, 0.45);

  --text-primary: #e8e6f0;
  --text-secondary: #9892ab;
  --text-muted: #5c5674;

  --accent-cyan: #00f0ff;
  --accent-magenta: #ff00aa;
  --accent-amber: #ffb800;
  --accent-violet: #8b5cf6;
  --accent-green: #00ff88;

  --gradient-main: linear-gradient(135deg, #00f0ff, #8b5cf6, #ff00aa);
  --gradient-hover: linear-gradient(135deg, #ff00aa, #8b5cf6, #00f0ff);
  --gradient-subtle: linear-gradient(135deg, rgba(0,240,255,0.1), rgba(139,92,246,0.1));

  --border-color: rgba(255, 255, 255, 0.06);
  --border-glow: rgba(0, 240, 255, 0.2);

  /* Typography */
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --fs-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.8rem);
  --fs-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.9rem);
  --fs-base: clamp(0.9rem, 0.85rem + 0.3vw, 1rem);
  --fs-md: clamp(1rem, 0.9rem + 0.5vw, 1.25rem);
  --fs-lg: clamp(1.25rem, 1.1rem + 0.75vw, 1.75rem);
  --fs-xl: clamp(1.75rem, 1.5rem + 1.25vw, 2.75rem);
  --fs-2xl: clamp(2.25rem, 1.75rem + 2.5vw, 4.5rem);
  --fs-3xl: clamp(3rem, 2rem + 5vw, 7rem);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 64px;

  /* Effects */
  --glass-blur: blur(20px);
  --glass-border: 1px solid rgba(255, 255, 255, 0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow-cyan: 0 0 30px rgba(0, 240, 255, 0.15);
  --shadow-glow-magenta: 0 0 30px rgba(255, 0, 170, 0.15);

  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms cubic-bezier(0.23, 1, 0.32, 1);
  --transition-spring: 600ms cubic-bezier(0.34, 1.56, 0.64, 1);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 50%;
}

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

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

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

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

a:hover {
  color: var(--accent-magenta);
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

::selection {
  background: rgba(0, 240, 255, 0.25);
  color: #fff;
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--accent-violet);
  border-radius: 3px;
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: var(--fs-2xl); }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-lg); }
h4 { font-size: var(--fs-md); }

.gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mono {
  font-family: var(--font-mono);
}

/* ── Layout ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.page-content {
  padding-top: calc(var(--nav-height) + var(--space-2xl));
  padding-bottom: var(--space-3xl);
  min-height: 100vh;
}

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

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(7, 7, 13, 0.85);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: var(--glass-border);
  transition: transform var(--transition-base), background var(--transition-base);
}

.navbar.hidden {
  transform: translateY(-100%);
}

.navbar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: var(--fs-md);
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-main);
  transition: width var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.lang-toggle {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  padding: 4px 10px;
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.05);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.lang-toggle:hover {
  background: rgba(0, 240, 255, 0.15);
  box-shadow: var(--shadow-glow-cyan);
}

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

.hamburger span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
  border-radius: 1px;
}

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

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(7, 7, 13, 0.97);
  backdrop-filter: var(--glass-blur);
  z-index: 999;
  padding: var(--space-2xl) var(--space-lg);
  flex-direction: column;
  gap: var(--space-lg);
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--text-secondary);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.mobile-menu a:hover {
  color: var(--accent-cyan);
  padding-left: var(--space-md);
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
}

/* ── Glass Card ── */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.3), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.glass-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow-cyan);
  transform: translateY(-4px);
}

.glass-card:hover::before {
  opacity: 1;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px 24px;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  cursor: pointer;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  border: none;
}

.btn-primary {
  background: var(--gradient-main);
  color: #000;
  box-shadow: 0 4px 15px rgba(0, 240, 255, 0.25);
}

.btn-primary:hover {
  box-shadow: 0 6px 25px rgba(0, 240, 255, 0.4);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
}

.btn-outline:hover {
  background: rgba(0, 240, 255, 0.1);
  box-shadow: var(--shadow-glow-cyan);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.btn-sm {
  padding: 6px 14px;
  font-size: var(--fs-xs);
}

/* ── Tags / Chips ── */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  border-radius: var(--radius-sm);
  background: rgba(139, 92, 246, 0.12);
  color: var(--accent-violet);
  border: 1px solid rgba(139, 92, 246, 0.2);
  white-space: nowrap;
}

.tag-cyan {
  background: rgba(0, 240, 255, 0.08);
  color: var(--accent-cyan);
  border-color: rgba(0, 240, 255, 0.2);
}

.tag-magenta {
  background: rgba(255, 0, 170, 0.08);
  color: var(--accent-magenta);
  border-color: rgba(255, 0, 170, 0.2);
}

.tag-filter {
  cursor: pointer;
  transition: all var(--transition-fast);
  padding: 5px 14px;
}

.tag-filter:hover,
.tag-filter.active {
  background: rgba(0, 240, 255, 0.2);
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow-cyan);
}

/* ── Section Headers ── */
.section-header {
  margin-bottom: var(--space-2xl);
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: var(--fs-xl);
  margin-bottom: var(--space-sm);
}

.section-desc {
  color: var(--text-secondary);
  max-width: 600px;
}

/* ── Footer ── */
.footer {
  background: var(--bg-secondary);
  border-top: var(--glass-border);
  padding: var(--space-2xl) 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-text {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: var(--space-md);
}

.footer-links a {
  color: var(--text-muted);
  font-size: var(--fs-sm);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

/* ── Page Loader ── */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

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

.loader-ring {
  width: 40px;
  height: 40px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ── Page Transitions ── */
.page-transition {
  animation: pageIn 0.6s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

.page-out {
  animation: pageOut 0.3s ease forwards;
}

/* ── Glitch Effect ── */
.glitch {
  position: relative;
}

.glitch:hover {
  animation: glitchText 0.3s ease;
}

.glitch-line {
  position: fixed;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent-cyan);
  opacity: 0;
  z-index: 9998;
  pointer-events: none;
}

/* ── Scanline Overlay ── */
.scanlines::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
  pointer-events: none;
  z-index: 9997;
}

/* ── Background Gradient Orbs ── */
.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  pointer-events: none;
  z-index: -1;
}

.bg-glow-1 {
  width: 500px;
  height: 500px;
  background: var(--accent-cyan);
  top: -200px;
  right: -100px;
}

.bg-glow-2 {
  width: 400px;
  height: 400px;
  background: var(--accent-magenta);
  bottom: -150px;
  left: -100px;
}

.bg-glow-3 {
  width: 300px;
  height: 300px;
  background: var(--accent-violet);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.08;
}

/* ── Form Elements ── */
.input-field {
  width: 100%;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  transition: all var(--transition-fast);
  outline: none;
}

.input-field:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.1);
}

.input-field::placeholder {
  color: var(--text-muted);
}

textarea.input-field {
  min-height: 120px;
  resize: vertical;
  line-height: 1.6;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-label {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-secondary);
}

/* ── Animations ── */
@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes pageIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pageOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-20px);
  }
}

@keyframes glitchText {
  0% { transform: translate(0); }
  20% { transform: translate(-2px, 2px); }
  40% { transform: translate(2px, -2px); }
  60% { transform: translate(-1px, -1px); }
  80% { transform: translate(1px, 1px); }
  100% { transform: translate(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 5px rgba(0, 240, 255, 0.2); }
  50% { box-shadow: 0 0 20px rgba(0, 240, 255, 0.4); }
}

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

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

/* ── Reveal on Scroll ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.23, 1, 0.32, 1),
              transform 0.8s cubic-bezier(0.23, 1, 0.32, 1);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ── Responsive ── */
@media (max-width: 1024px) {
  :root {
    --space-2xl: 3rem;
    --space-3xl: 4rem;
  }
}

@media (max-width: 768px) {
  :root {
    --space-lg: 1.25rem;
    --space-xl: 2rem;
    --space-2xl: 2.5rem;
    --space-3xl: 3rem;
  }

  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .glass-card {
    padding: var(--space-lg);
  }
}