/**
 * BASE CSS — Danial Eyvazi Portfolio v2
 * Reset + CSS Custom Properties + Typography
 */

/* ============================================
   CSS CUSTOM PROPERTIES
   ============================================ */
:root {
  /* Background Scale (Dark Slate) */
  --bg-0: #020617;         /* slate-950, page background */
  --bg-1: #0f172a;         /* slate-900, cards */
  --bg-2: #1e293b;         /* slate-800, elevated */
  --bg-3: #334155;         /* slate-700, borders */

  /* Foreground Scale */
  --fg-0: #f8fafc;         /* slate-50, primary text */
  --fg-1: #e2e8f0;         /* slate-200, headings */
  --fg-2: #cbd5e1;         /* slate-300, body */
  --fg-3: #94a3b8;         /* slate-400, muted */
  --fg-4: #64748b;         /* slate-500, subtle */

  /* Accent (Emerald) */
  --accent: #10b981;       /* emerald-500 */
  --accent-soft: #34d399;  /* emerald-400 */
  --accent-softer: #6ee7b7;/* emerald-300 */
  --accent-glow: rgba(16, 185, 129, 0.15);
  --accent-glow-strong: rgba(16, 185, 129, 0.4);

  /* Ring / Focus */
  --ring: rgba(52, 211, 153, 0.5);
  --ring-offset: var(--bg-0);

  /* Gradients */
  --grad-hero: radial-gradient(1200px circle at 20% 0%, var(--accent-glow), transparent 50%);
  --grad-text: linear-gradient(135deg, #10b981 0%, #34d399 50%, #6ee7b7 100%);
  --grad-text-gold: linear-gradient(135deg, #f59e0b 0%, #fbbf24 50%, #fcd34d 100%);

  /* Typography */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Sizing */
  --container-max: 1280px;
  --container-narrow: 720px;
  --header-height: 80px;
  --header-height-scrolled: 64px;

  /* Transitions */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px -10px rgba(16, 185, 129, 0.5);
  --shadow-glow-sm: 0 0 20px -5px rgba(16, 185, 129, 0.4);

  /* Z-Index Scale */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-popover: 500;
  --z-tooltip: 600;
  --z-cursor: 9999;
}

/* ============================================
   CSS RESET (Modern)
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg-2);
  background-color: var(--bg-0);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

main {
  flex: 1 0 auto;
}

footer {
  flex-shrink: 0;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  color: var(--fg-0);
}

p {
  margin-bottom: 1em;
}

p:last-child {
  margin-bottom: 0;
}

::selection {
  background: var(--accent);
  color: var(--bg-0);
}

/* ============================================
   FOCUS STATES (Accessibility)
   ============================================ */
:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ============================================
   TYPOGRAPHY UTILITIES
   ============================================ */
.text-display {
  font-family: var(--font-display);
}

.text-body {
  font-family: var(--font-body);
}

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

.gradient-text {
  background: var(--grad-text);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 4s ease infinite;
}

.gradient-text-gold {
  background: var(--grad-text-gold);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 4s ease infinite;
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

@media (min-width: 640px) {
  .container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

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

/* ============================================
   KEYFRAME ANIMATIONS
   ============================================ */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

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

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

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

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

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

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(2deg); }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 20px rgba(16, 185, 129, 0.3); }
  50% { box-shadow: 0 0 40px rgba(16, 185, 129, 0.6); }
}

@keyframes blob {
  0% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -50px) scale(1.1); }
  66% { transform: translate(-20px, 20px) scale(0.9); }
  100% { transform: translate(0, 0) scale(1); }
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes ping {
  75%, 100% {
    transform: scale(2);
    opacity: 0;
  }
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-1);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-3);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--fg-4);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--bg-3) var(--bg-1);
}

/* ============================================
   LENIS SMOOTH SCROLL
   ============================================ */
html.lenis, html.lenis body {
  height: auto;
}

.lenis.lenis-smooth {
  scroll-behavior: auto !important;
}

.lenis.lenis-smooth [data-lenis-prevent] {
  overscroll-behavior: contain;
}

.lenis.lenis-stopped {
  overflow: hidden;
}

.lenis.lenis-smooth iframe {
  pointer-events: none;
}