/* ==================================================
   NEXUS VISION — BASE STYLES
   مشترک بین index, login, dashboard
   ================================================== */

/* ---------- RESET ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ---------- ROOT VARIABLES (LIGHT THEME) ---------- */
:root {
  /* animations */
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);

  /* sidebar sizes */
  --sidebar-collapsed: 72px;
  --sidebar-expanded: 260px;

  /* light theme colors */
  --bg: #eef1f7;
  --bg-soft: #ffffff;
  --nav-bg: rgba(255, 255, 255, .72);
  --nav-bg-scrolled: rgba(255, 255, 255, .92);

  --text: #0e1220;
  --text-dim: rgba(14, 18, 32, .68);
  --text-faint: rgba(14, 18, 32, .52);
  --text-faint2: rgba(14, 18, 32, .38);

  --glass: rgba(14, 18, 32, .035);
  --glass-border: rgba(14, 18, 32, .1);
  --input-bg: rgba(14, 18, 32, .03);

  --primary: #0098b0;
  --secondary: #8b2fd9;
  --accent: #d6005a;
  --neon-green: #00a173;
  --danger: #d6335c;
  --warn: #e0a800;

  --box-dark: rgba(14, 18, 32, .06);
  --grid-line: rgba(0, 152, 176, .14);

  /* safe area */
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

/* ---------- ROOT VARIABLES (DARK THEME) ---------- */
html[data-theme="dark"] {
  --bg: #020308;
  --bg-soft: #05060a;
  --nav-bg: rgba(5, 6, 10, .5);
  --nav-bg-scrolled: rgba(5, 6, 10, .88);

  --text: #f0f4ff;
  --text-dim: rgba(240, 244, 255, .68);
  --text-faint: rgba(240, 244, 255, .52);
  --text-faint2: rgba(240, 244, 255, .38);

  --glass: rgba(255, 255, 255, .04);
  --glass-border: rgba(255, 255, 255, .08);
  --input-bg: rgba(255, 255, 255, .04);

  --primary: #00e5ff;
  --secondary: #b026ff;
  --accent: #ff006e;
  --neon-green: #00ffa3;
  --danger: #ff4d6d;
  --warn: #ffd93d;

  --box-dark: rgba(0, 0, 0, .32);
  --grid-line: rgba(0, 229, 255, .06);
}

/* ---------- BASE ELEMENTS ---------- */
html {
  scroll-behavior: smooth;
  scroll-padding-top: env(safe-area-inset-top, 0px);
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Vazirmatn', sans-serif;
  line-height: 1.8;
  overflow-x: hidden;
  min-height: 100vh;
  transition: background .4s, color .4s;
}

html[lang="en"] body {
  font-family: 'Space Grotesk', system-ui, sans-serif;
}

a {
  color: inherit;
}

button {
  font-family: inherit;
}

/* ---------- ACCESSIBILITY ---------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 8px;
}

/* ---------- REDUCED MOTION ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==================================================
   BACKGROUND LAYER (orbs + grid)
   ================================================== */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -5;
  overflow: hidden;
}

.bg-grid {
  position: absolute;
  inset: -100px;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 80px 80px;
  animation: gridMove 25s linear infinite;
  mask-image: radial-gradient(circle at 50% 50%, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, black 20%, transparent 80%);
}

@keyframes gridMove {
  to { transform: translate(80px, 80px); }
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: .35;
  animation: orbFloat 18s ease-in-out infinite;
}

html[data-theme="light"] .orb {
  opacity: .22;
}

.orb-1 {
  width: 600px;
  height: 600px;
  background: var(--primary);
  top: -250px;
  right: -150px;
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: var(--secondary);
  bottom: -200px;
  left: -150px;
  animation-delay: -6s;
}

.orb-3 {
  width: 400px;
  height: 400px;
  background: var(--accent);
  top: 45%;
  left: 45%;
  animation-delay: -12s;
  opacity: .7;
}

@keyframes orbFloat {
  50% { transform: translate(60px, -60px) scale(1.15); }
}

/* ==================================================
   SHARED BUTTONS
   ================================================== */
.btn-primary {
  padding: 13px 28px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border: none;
  border-radius: 50px;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  font-size: .92rem;
  transition: all .4s var(--ease-out-expo);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 152, 176, .35);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, .4);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width .6s, height .6s;
}

.btn-primary:hover::before {
  width: 400px;
  height: 400px;
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 15px 50px rgba(0, 152, 176, .5), 0 0 30px rgba(139, 47, 217, .3);
}

.btn-primary span {
  position: relative;
  z-index: 1;
}

.btn-ghost {
  padding: 13px 26px;
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  color: var(--text);
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  font-size: .92rem;
  transition: all .4s;
  display: flex;
  align-items: center;
  gap: 12px;
  backdrop-filter: blur(10px);
}

.btn-ghost:hover {
  border-color: var(--primary);
  background: var(--glass);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 152, 176, .15);
}

/* ==================================================
   ICON TOGGLES (theme / lang)
   ================================================== */
.icon-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: var(--glass);
  color: var(--text);
  font-size: .95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .3s;
  font-family: inherit;
}

.icon-toggle:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.lang-toggle {
  width: auto;
  padding: 0 14px;
  font-weight: 700;
  font-size: .78rem;
  letter-spacing: .5px;
  font-family: 'Space Grotesk', sans-serif;
}

/* ==================================================
   REVEAL ANIMATION (scroll-triggered)
   ================================================== */
.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: all .9s var(--ease-out-expo);
}

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

/* ==================================================
   CUSTOM CURSOR (desktop only)
   ================================================== */
.cursor-dot,
.cursor-ring {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  border-radius: 50%;
  mix-blend-mode: difference;
}

.cursor-dot {
  width: 6px;
  height: 6px;
  background: var(--primary);
  transform: translate(-50%, -50%);
}

.cursor-ring {
  width: 38px;
  height: 38px;
  border: 1.5px solid rgba(0, 229, 255, .5);
  transform: translate(-50%, -50%);
  transition: all .3s cubic-bezier(.4, 0, .2, 1);
}

.cursor-ring.hover {
  width: 64px;
  height: 64px;
  border-color: var(--accent);
  background: rgba(0, 229, 255, .1);
}

@media (max-width: 900px), (hover: none) {
  body { cursor: auto; }
  .cursor-dot, .cursor-ring { display: none; }
}

/* ==================================================
   SCROLL PROGRESS BAR
   ================================================== */
.scroll-progress {
  position: fixed;
  top: 0;
  right: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
  z-index: 9998;
  transition: width .1s;
  box-shadow: 0 0 15px var(--primary);
}

html[lang="en"] .scroll-progress {
  right: auto;
  left: 0;
}

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

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

::-webkit-scrollbar-thumb {
  background: rgba(0, 152, 176, .3);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 152, 176, .5);
}

/* ==================================================
   UTILITIES
   ================================================== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 5%;
}

section {
  position: relative;
}