/* Fonts loaded via <link> in HTML for better performance */

/* ═══════════════════════════════════════════════════
   Design System — Minimalist Professional Portfolio
   60-30-10 Color Rule | Clean Typography | Whitespace
   ═══════════════════════════════════════════════════ */

:root {
  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Sora', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing — generous whitespace */
  --space-xs: .25rem;
  --space-sm: .5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;
  --space-4xl: 7rem;

  /* Radii — modern but subtle */
  --radius-sm: .375rem;
  --radius-md: .5rem;
  --radius-lg: .75rem;
  --radius-xl: 1rem;
  --radius-full: 50%;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Shadows — minimal, clean */
  --shadow-sm: 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 2px 8px rgba(0,0,0,.06);
  --shadow-lg: 0 4px 16px rgba(0,0,0,.08);
  --shadow-xl: 0 8px 32px rgba(0,0,0,.1);
  --shadow-glow: 0 4px 20px rgba(99,102,241,.1);

  /* Layout */
  --container-max: 1120px;
  --container-narrow: 720px;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-toast: 400;
}

/* ── Light Theme (Primary) ── */
[data-theme="light"] {
  /* 60% — Background */
  --color-bg: #FFFFFF;
  --color-bg-secondary: #FAFAFA;
  --color-bg-tertiary: #F5F5F5;

  /* Surface & Borders */
  --color-surface: #FFFFFF;
  --color-border: #E5E7EB;
  --color-border-strong: #D1D5DB;

  /* 30% — Text */
  --color-text: #1A1A2E;
  --color-text-secondary: #4B5563;
  --color-text-muted: #9CA3AF;

  /* 10% — Accent (Purple/Lilac) */
  --color-primary: #6366F1;
  --color-primary-hover: #4F46E5;
  --color-primary-light: rgba(99,102,241,.06);
  --color-primary-glow: rgba(99,102,241,.12);

  /* Secondary accent — used sparingly */
  --color-accent: #8B5CF6;
  --color-accent-light: rgba(139,92,246,.06);

  /* Semantic */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;

  /* Derived */
  --gradient-hero: none;
  --gradient-accent: linear-gradient(135deg, #6366F1, #8B5CF6);
  --gradient-text: linear-gradient(135deg, #6366F1, #8B5CF6);

  /* Glass — simplified for minimal look */
  --glass-bg: #FFFFFF;
  --glass-border: #E5E7EB;
  --glass-blur: 0px;

  /* Nav */
  --nav-bg: rgba(255,255,255,.92);
  --cookie-bg: rgba(255,255,255,.98);
}

/* ── Dark Theme ── */
[data-theme="dark"] {
  --color-bg: #0F0F1A;
  --color-bg-secondary: #161625;
  --color-bg-tertiary: #1E1E32;
  --color-surface: #1A1A2E;
  --color-border: rgba(255,255,255,.08);
  --color-border-strong: rgba(255,255,255,.14);
  --color-text: #F0F0F5;
  --color-text-secondary: #A0A0BC;
  --color-text-muted: #6B6B8A;
  --color-primary: #818CF8;
  --color-primary-hover: #6366F1;
  --color-primary-light: rgba(129,140,248,.1);
  --color-primary-glow: rgba(129,140,248,.18);
  --color-accent: #A78BFA;
  --color-accent-light: rgba(167,139,250,.1);
  --color-success: #34D399;
  --color-warning: #FBBF24;
  --color-error: #F87171;
  --gradient-hero: none;
  --gradient-accent: linear-gradient(135deg, #818CF8, #A78BFA);
  --gradient-text: linear-gradient(135deg, #818CF8, #A78BFA);
  --glass-bg: rgba(22,22,37,.95);
  --glass-border: rgba(255,255,255,.06);
  --glass-blur: 0px;
  --nav-bg: rgba(15,15,26,.95);
  --cookie-bg: rgba(22,22,37,.98);
}

/* ═══════════════════════════════
   Reset & Base
   ═══════════════════════════════ */

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

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

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--transition-slow), color var(--transition-slow);
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Remove the gradient overlay on body */
body::before {
  display: none;
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}
h2 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 700;
}
h3 {
  font-size: clamp(1.125rem, 2.5vw, 1.35rem);
  font-weight: 600;
}

p {
  margin-bottom: var(--space-md);
  line-height: 1.8;
}

::selection {
  background: var(--color-primary);
  color: #fff;
}

/* ═══════════════════════════════
   Layout
   ═══════════════════════════════ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* Gradient text — accent only */
.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section {
  padding: var(--space-4xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-title h2 {
  margin-bottom: var(--space-sm);
}

.section-title p {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* ═══════════════════════════════
   Background Orbs — Subtle in dark, hidden in light
   ═══════════════════════════════ */

.bg-orbs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

[data-theme="light"] .bg-orbs,
[data-theme="light"] .hero-bg-image,
[data-theme="light"] .hero-grid,
[data-theme="light"] .hero-particles {
  display: none !important;
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: .12;
  will-change: transform;
}

.bg-orb:nth-child(1) {
  width: 500px;
  height: 500px;
  background: var(--color-primary);
  top: -10%;
  left: -5%;
  animation: orbFloat1 25s ease-in-out infinite;
}

.bg-orb:nth-child(2) {
  width: 400px;
  height: 400px;
  background: var(--color-accent);
  top: 50%;
  right: -10%;
  animation: orbFloat2 30s ease-in-out infinite -5s;
}

.bg-orb:nth-child(3) {
  width: 300px;
  height: 300px;
  background: #8b5cf6;
  bottom: -5%;
  left: 30%;
  animation: orbFloat3 22s ease-in-out infinite -10s;
}

@keyframes orbFloat1 {
  0%, 100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(30px,-20px) scale(1.05); }
}

@keyframes orbFloat2 {
  0%, 100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(-20px,30px) scale(1.05); }
}

@keyframes orbFloat3 {
  0%, 100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(20px,-30px) scale(1.05); }
}

/* ═══════════════════════════════
   Navbar — Clean, readable on white
   ═══════════════════════════════ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  cursor: pointer;
  letter-spacing: -0.5px;
}

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

.nav-links a {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: .9rem;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

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

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

/* Language Selector */
.lang-selector {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: .85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  border-color: var(--color-primary);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  min-width: 130px;
  box-shadow: var(--shadow-lg);
}

.lang-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: block;
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: none;
  border: none;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: .85rem;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-option:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* Theme Toggle */
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg-tertiary);
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.mobile-menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

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

/* ═══════════════════════════════
   Cards — Clean, flat, subtle border
   ═══════════════════════════════ */

.glass-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
}

.glass-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

/* ═══════════════════════════════
   Buttons — Minimal, accent colored
   ═══════════════════════════════ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: .7rem 1.5rem;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .9rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  line-height: 1;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: none;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: #fff;
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

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

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-sm {
  padding: .45rem .9rem;
  font-size: .8rem;
}

/* ═══════════════════════════════
   Tags — Subtle, accent only
   ═══════════════════════════════ */

.tag {
  display: inline-flex;
  align-items: center;
  padding: .2rem .65rem;
  border-radius: var(--radius-sm);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .02em;
  transition: all var(--transition-fast);
}

.tag-primary {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.tag-accent {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.tag-success {
  background: rgba(16,185,129,.08);
  color: var(--color-success);
}

.tag-warning {
  background: rgba(245,158,11,.08);
  color: var(--color-warning);
}

.tag-clickable {
  cursor: pointer;
}

.tag-clickable:hover {
  transform: scale(1.03);
}

.tag-clickable.active {
  background: var(--color-primary);
  color: #fff;
}