/* ===========================================
   Components - Reusable UI Elements
   =========================================== */

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: var(--space-md) 0;
  transition: background var(--transition-base), backdrop-filter var(--transition-base), border-color var(--transition-base);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: rgba(255, 255, 255, 0.05);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-text-primary);
  letter-spacing: -0.03em;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav__logo:hover {
  color: var(--color-accent-blue);
}

.nav__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.nav__toggle:hover {
  border-color: var(--color-border-hover);
  background: var(--color-surface);
}

@media (min-width: 1024px) {
  .nav__toggle {
    display: none;
  }
}

.nav__links {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  background: rgba(10, 10, 15, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  z-index: 999;
}

.nav__links.active {
  display: flex;
}

@media (min-width: 1024px) {
  .nav__links {
    display: flex;
    position: static;
    width: auto;
    height: auto;
    background: none;
    backdrop-filter: none;
    flex-direction: row;
    gap: var(--space-sm);
  }
}

.nav__link {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
  position: relative;
}

@media (min-width: 1024px) {
  .nav__link {
    font-size: var(--text-sm);
  }
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-text-primary);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 1px;
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 60%;
}

.nav__close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-lg);
  width: 44px;
  height: 44px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (min-width: 1024px) {
  .nav__close {
    display: none;
  }
}

/* --- Glassmorphism Card --- */
.glass-card {
  background: var(--color-surface);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  transition: background var(--transition-base), border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

@media (min-width: 640px) {
  .glass-card {
    padding: var(--space-2xl);
  }
}

.glass-card:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-hover);
}

.glass-card--lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* --- Glow Card --- */
.glow-card {
  position: relative;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  overflow: hidden;
}

@media (min-width: 640px) {
  .glow-card {
    padding: var(--space-2xl);
  }
}

.glow-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: calc(var(--radius-xl) + 1px);
  background: var(--card-gradient, var(--gradient-primary));
  z-index: -1;
  opacity: 0.3;
  transition: opacity var(--transition-base);
}

.glow-card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: calc(var(--radius-xl) + 1px);
  background: var(--card-gradient, var(--gradient-primary));
  z-index: -2;
  filter: blur(25px);
  opacity: 0.1;
  transition: opacity var(--transition-base);
}

.glow-card:hover::before {
  opacity: 0.5;
}

.glow-card:hover::after {
  opacity: 0.2;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.75rem;
  font-family: 'Inter', sans-serif;
  font-size: var(--text-sm);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn .icon {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: var(--gradient-primary);
  background-size: 200% 200%;
  background-position: 0% 50%;
  color: white;
}

.btn-primary:hover {
  background-position: 100% 50%;
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.3);
  transform: translateY(-2px);
  color: white;
}

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

.btn-ghost:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-accent-blue);
  color: var(--color-text-primary);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: var(--text-xs);
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* --- Tech Chips --- */
.tech-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.35rem 0.7rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
  white-space: nowrap;
}

@media (min-width: 640px) {
  .tech-chip {
    padding: 0.4rem 0.875rem;
  }
}

.tech-chip::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--chip-color, var(--color-accent-blue));
  flex-shrink: 0;
}

.tech-chip:hover {
  border-color: var(--chip-color, var(--color-accent-blue));
  color: var(--color-text-primary);
  background: var(--color-surface-hover);
  transform: translateY(-2px);
}

/* --- Form Inputs --- */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 16px; /* Prevents iOS zoom on focus */
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent-blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-select option {
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* --- Stat Card --- */
.stat-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.stat-card:hover {
  border-color: var(--color-border-hover);
  background: var(--color-surface-hover);
  transform: translateY(-2px);
}

.stat-card .icon {
  width: 24px;
  height: 24px;
  color: var(--color-accent-cyan);
  flex-shrink: 0;
}

.stat-card__text {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
}

/* --- Icon Styles --- */
.icon {
  width: 24px;
  height: 24px;
  stroke: currentColor;
}

.icon-lg {
  width: 40px;
  height: 40px;
}

.icon-xl {
  width: 48px;
  height: 48px;
}