/* ========================================
   Components — Premium Light Theme
   ======================================== */

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  white-space: nowrap;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent-primary);
  color: #fff;
  border: none;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background: var(--accent-secondary);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
  transform: translateY(-2px);
  color: #fff;
}

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

.btn-outline:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: var(--accent-glow);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-accent);
  padding: var(--space-2) 0;
  border: none;
}

.btn-ghost:hover {
  color: var(--accent-secondary);
}

.btn-ghost svg {
  transition: transform var(--transition-fast);
}

.btn-ghost:hover svg {
  transform: translateX(4px);
}

.btn-lg {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-base);
}

/* ---- Cards ---- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-card);
}

.card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-6);
  color: var(--accent-primary);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.card-text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---- Badge / Tag ---- */
.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background: var(--accent-glow);
  color: var(--accent-primary);
  border: 1px solid var(--border-accent);
}

.tag {
  display: inline-block;
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-4) 0;
  transition: all var(--transition-base);
}

/* Default nav = dark text for light pages */
.nav .nav-link {
  color: var(--text-secondary);
}

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

.nav .nav-toggle span {
  background: var(--text-primary);
}

/* Dark hero pages — white text nav */
.nav--dark-hero .nav-link {
  color: rgba(255,255,255,0.7);
}

.nav--dark-hero .nav-link:hover,
.nav--dark-hero .nav-link.active {
  color: #fff;
}

.nav--dark-hero .nav-toggle span {
  background: #fff;
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-3) 0;
  box-shadow: var(--shadow-sm);
}

/* Scrolled on ANY page = white bg, dark text */
.nav.scrolled .nav-link,
.nav--dark-hero.scrolled .nav-link {
  color: var(--text-secondary);
}

.nav.scrolled .nav-link:hover,
.nav.scrolled .nav-link.active,
.nav--dark-hero.scrolled .nav-link:hover,
.nav--dark-hero.scrolled .nav-link.active {
  color: var(--text-primary);
}

.nav.scrolled .nav-toggle span,
.nav--dark-hero.scrolled .nav-toggle span {
  background: var(--text-primary);
}

.nav--dark-hero.scrolled .nav-logo-img {
  filter: none;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
}

/* Logo — default: natural colors for light pages */
.nav-logo-img {
  height: 48px;
  width: auto;
  transition: all var(--transition-base);
}

/* Dark hero pages: brighten logo */
.nav--dark-hero .nav-logo-img {
  filter: brightness(2) contrast(1.2);
}

/* Scrolled on any page = white bg, natural logo */
.nav.scrolled .nav-logo-img {
  height: 42px;
  filter: none;
}

.footer-logo-img {
  height: 56px;
  width: auto;
  filter: brightness(2) contrast(1.2);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-cta {
  margin-left: var(--space-4);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-2);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-base);
  border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---- Mobile Menu ---- */
.nav-mobile {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
}

.nav-mobile.active {
  display: flex;
}

.nav-mobile a {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.nav-mobile a:hover {
  color: var(--text-primary);
}

/* ---- Footer — Dark Section ---- */
.footer {
  background: var(--bg-dark);
  color: var(--text-on-dark-secondary);
  padding: var(--space-16) 0 var(--space-8);
}

.footer h4,
.footer .footer-heading {
  color: var(--text-on-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-brand p {
  font-size: var(--text-sm);
  color: var(--text-on-dark-secondary);
  margin-top: var(--space-4);
  max-width: 300px;
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a,
.footer-links span {
  font-size: var(--text-sm);
  color: var(--text-on-dark-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #fff;
}

.footer-social {
  display: flex;
  gap: var(--space-4);
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-md);
  color: var(--text-on-dark-secondary);
  transition: all var(--transition-base);
}

.footer-social a:hover {
  border-color: rgba(255,255,255,0.4);
  color: #fff;
  background: rgba(255,255,255,0.05);
}

.footer-social a svg {
  width: 18px;
  height: 18px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: var(--text-xs);
  color: var(--text-on-dark-secondary);
}

/* ---- CTA Banner — Dark accent section ---- */
.cta-banner {
  position: relative;
  padding: var(--space-24) 0;
  text-align: center;
  overflow: hidden;
  background: var(--bg-dark);
  color: var(--text-on-dark);
}

.cta-banner .container {
  position: relative;
  z-index: 1;
}

.cta-banner h2 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
  color: #fff;
}

.cta-banner p {
  font-size: var(--text-lg);
  color: var(--text-on-dark-secondary);
  margin-bottom: var(--space-8);
}

.cta-banner .text-gradient {
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- Page Hero ---- */
.page-hero {
  padding: var(--space-32) 0 var(--space-16);
  text-align: center;
  position: relative;
  overflow: hidden;
  background: var(--bg-secondary);
}

.page-hero h1 {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
  position: relative;
}

.page-hero p {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-8);
  position: relative;
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--text-accent);
}

.breadcrumb .separator {
  color: var(--text-muted);
}

/* ---- Form Elements ---- */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.form-error {
  font-size: var(--text-xs);
  color: var(--error);
  margin-top: var(--space-1);
}

.form-success {
  padding: var(--space-4) var(--space-6);
  background: rgba(22, 163, 74, 0.08);
  border: 1px solid rgba(22, 163, 74, 0.2);
  border-radius: var(--radius-md);
  color: var(--success);
  text-align: center;
}