:root {
  --transition-speed: 0.4s;
}

[data-theme="dark"] {
  --bg-primary: #0a0a1a;
  --bg-card: rgba(15, 15, 46, 0.7);
  --text-primary: #e0e0ff;
  --text-secondary: #8888bb;
  --accent-1: #00d4ff;
  --accent-2: #7b2fff;
  --accent-gradient: linear-gradient(135deg, #00d4ff, #7b2fff, #ff2d95);
  --border-color: rgba(100, 100, 200, 0.15);
  --input-bg: rgba(15, 15, 46, 0.8);
  --glow-1: rgba(0, 213, 255, 0.253);
  --particle-color: rgba(0, 213, 255, 0.205);
}

[data-theme="light"] {
  --bg-primary: #f0f2ff;
  --bg-card: rgba(255, 255, 255, 0.8);
  --text-primary: #1a1a3e;
  --text-secondary: #4a4a7a;
  --accent-1: #0088cc;
  --accent-2: #6b1fff;
  --accent-gradient: linear-gradient(135deg, #0088cc, #6b1fff, #e0006f);
  --border-color: rgba(100, 100, 200, 0.2);
  --input-bg: rgba(255, 255, 255, 0.9);
  --glow-1: rgba(0, 136, 204, 0.2);
  --particle-color: rgba(107, 31, 255, 0.4);
}

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

/* اصلاح body برای موبایل */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow-x: hidden;
  overflow-y: auto;
  transition: background var(--transition-speed);
}

@media (max-width: 768px) {
  body {
    overflow-y: auto !important;
    overflow-x: hidden;
    align-items: flex-start;
    padding: 2rem 0;
  }

  .login-container {
    margin: 2rem auto;
  }

  .login-card {
    padding: 2rem 1.5rem;
  }

  .theme-toggle {
    top: 1rem;
    left: 1rem;
    width: 45px;
    height: 45px;
    position: fixed;
  }

  .nav-logo {
    top: 1rem;
    right: 1rem;
    position: fixed;
  }

  /* غیرفعال کردن cursor glow روی موبایل */
  .cursor-glow {
    display: none;
  }

  /* کاهش particles روی موبایل */
  #particles-canvas {
    opacity: 0.3;
  }
}

/* تبلت */
@media (max-width: 1024px) and (min-width: 769px) {
  body {
    overflow-y: auto;
  }
}

/* اصلاح input ها برای iOS */
.form-control {
  width: 100%;
  padding: 0.9rem 3rem 0.9rem 1rem;
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-speed);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

@media (max-width: 768px) {
  .form-control {
    font-size: 16px;
  }
}

#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.cursor-glow {
  position: fixed;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--glow-1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: 1;
  transition: opacity 0.3s;
}

.theme-toggle {
  position: fixed;
  top: 2rem;
  left: 2rem;
  width: 50px;
  height: 50px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 100;
  backdrop-filter: blur(10px);
  transition: all var(--transition-speed);
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 0 20px var(--glow-1);
}

.toggle-ball {
  font-size: 1.5rem;
}

.login-container {
  position: relative;
  z-index: 10;
  width: 90%;
  max-width: 450px;
  animation: fadeInUp 0.8s ease;
}

.login-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 3rem 2.5rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  transition: all var(--transition-speed);
}

.login-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.4);
}

.login-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.login-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--accent-1);
  margin-bottom: 1.5rem;
}

.dot {
  width: 8px;
  height: 8px;
  background: var(--accent-1);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {

  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(0, 255, 136, 0.4);
  }

  50% {
    box-shadow: 0 0 0 8px rgba(0, 255, 136, 0);
  }
}

.login-title {
  font-size: 2rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.login-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

.input-wrapper {
  position: relative;
}

.input-wrapper i {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent-1);
  font-size: 1rem;
}

.form-control {
  width: 100%;
  padding: 0.9rem 3rem 0.9rem 1rem;
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-speed);
  outline: none;
}

.form-control:focus {
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px var(--glow-1);
}

.form-control::placeholder {
  color: var(--text-secondary);
  opacity: 0.6;
}

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
}

.checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.checkbox-wrapper input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.forgot-link {
  color: var(--accent-1);
  text-decoration: none;
  transition: color var(--transition-speed);
}

.forgot-link:hover {
  color: var(--accent-2);
}

.btn {
  width: 100%;
  padding: 1rem;
  background: var(--accent-gradient);
  border: none;
  border-radius: 12px;
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-speed);
  position: relative;
  overflow: hidden;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--glow-1);
}

.btn:active {
  transform: translateY(0);
}

.divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem 0;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-color);
}

.social-login {
  display: flex;
  gap: 1rem;
}

.social-btn {
  flex: 1;
  padding: 0.9rem;
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-speed);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.social-btn:hover {
  border-color: var(--accent-1);
  transform: translateY(-2px);
}

.signup-link {
  text-align: center;
  margin-top: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.signup-link a {
  color: var(--accent-1);
  text-decoration: none;
  font-weight: 600;
}

.signup-link a:hover {
  color: var(--accent-2);
}

.nav-logo {
  position: fixed;
  top: 2rem;
  right: 2rem;
  font-size: 1.5rem;
  font-weight: 900;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  cursor: pointer;
  z-index: 100;
  text-decoration: none;
}

.nav-logo::after {
  content: '_';
  -webkit-text-fill-color: var(--accent-1);
  animation: blink 1s infinite;
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .login-card {
    padding: 2rem 1.5rem;
  }

  .theme-toggle {
    top: 1rem;
    left: 1rem;
    width: 45px;
    height: 45px;
  }
}