/* TAU Icon Generator - Main Styles */

/* CSS Variables (Design Tokens) */
:root {
  --background: oklch(0.12 0 0);
  --foreground: oklch(0.98 0 0);
  --card: oklch(0.16 0 0);
  --card-foreground: oklch(0.98 0 0);
  --primary: oklch(0.75 0.15 195);
  --primary-foreground: oklch(0.12 0 0);
  --secondary: oklch(0.22 0 0);
  --muted: oklch(0.22 0 0);
  --muted-foreground: oklch(0.65 0 0);
  --border: oklch(0.25 0 0);
  --chart-2: oklch(0.7 0.18 280);
  --radius: 0.5rem;
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--background);
  color: var(--foreground);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .container {
    padding: 0 1.5rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 2rem;
  }
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background-color: rgba(18, 18, 18, 0.8);
  backdrop-filter: blur(12px);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--foreground);
}

.nav-logo svg {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--primary);
}

.nav-logo-text {
  background: linear-gradient(to right, var(--primary), var(--chart-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 2rem;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted-foreground);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--foreground);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius);
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--primary-foreground);
}

.btn-primary:hover {
  opacity: 0.9;
}

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

.btn-outline:hover {
  background-color: var(--muted);
}

.btn-lg {
  padding: 0.75rem 2rem;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
}

/* Hero Section */
.hero {
  position: relative;
  overflow: hidden;
  padding-top: 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(120, 200, 230, 0.05), transparent);
}

.hero-content {
  position: relative;
  padding: 6rem 0;
  text-align: center;
}

@media (min-width: 768px) {
  .hero-content {
    padding: 8rem 0;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  margin-bottom: 2rem;
  border-radius: 9999px;
  background-color: rgba(120, 200, 230, 0.1);
  border: 1px solid rgba(120, 200, 230, 0.2);
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 500;
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.1;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 4.5rem;
  }
}

.gradient-text {
  background: linear-gradient(to right, var(--primary), var(--chart-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--muted-foreground);
  margin-bottom: 3rem;
  max-width: 42rem;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 2rem;
}

@media (min-width: 640px) {
  .hero-buttons {
    flex-direction: row;
  }
}

.hero-note {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-top: 0.5rem;
}

/* Sections */
.section {
  padding: 4rem 0;
}

@media (min-width: 768px) {
  .section {
    padding: 6rem 0;
  }
}

.section-bg {
  background: linear-gradient(to bottom, rgba(120, 200, 230, 0.05), transparent);
}

.section-card-bg {
  background-color: rgba(255, 255, 255, 0.02);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-align: center;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.5rem;
  }
}

.section-description {
  font-size: 1.125rem;
  color: var(--muted-foreground);
  text-align: center;
  max-width: 42rem;
  margin: 0 auto 4rem;
}

/* Cards */
.card {
  background-color: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.card:hover {
  border-color: rgba(120, 200, 230, 0.5);
}

.card-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius);
  background-color: rgba(120, 200, 230, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.card-icon svg {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--primary);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.card-description {
  color: var(--muted-foreground);
  font-size: 0.875rem;
}

/* Grid */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-cols-1 {
  grid-template-columns: repeat(1, 1fr);
}

@media (min-width: 768px) {
  .grid-md-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-lg-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Footer */
.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background-color: rgba(255, 255, 255, 0.02);
  padding: 3rem 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-decoration: none;
  color: var(--foreground);
}

.footer-description {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  max-width: 28rem;
}

.footer-title {
  font-weight: 600;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--foreground);
}

.footer-bottom {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.text-balance {
  text-wrap: balance;
}

.max-w-4xl {
  max-width: 56rem;
}

.max-w-2xl {
  max-width: 42rem;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.mb-4 {
  margin-bottom: 1rem;
}

.mb-6 {
  margin-bottom: 1.5rem;
}

.mb-8 {
  margin-bottom: 2rem;
}

.mb-12 {
  margin-bottom: 3rem;
}

.mt-4 {
  margin-top: 1rem;
}

.mt-6 {
  margin-top: 1.5rem;
}

.gap-2 {
  gap: 0.5rem;
}

.gap-4 {
  gap: 1rem;
}

.flex {
  display: flex;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.space-y-4 > * + * {
  margin-top: 1rem;
}

.space-y-6 > * + * {
  margin-top: 1.5rem;
}

/* Alert */
.alert {
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid rgba(120, 200, 230, 0.2);
  background-color: rgba(120, 200, 230, 0.05);
  display: flex;
  gap: 0.75rem;
}

.alert svg {
  width: 1rem;
  height: 1rem;
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 0.125rem;
}

.alert-warning {
  border-color: rgba(239, 68, 68, 0.5);
  background-color: rgba(239, 68, 68, 0.05);
}

.alert-warning svg {
  color: rgb(239, 68, 68);
}

/* List Styles */
ol {
  list-style: decimal;
  padding-left: 1.5rem;
}

ol li {
  margin-bottom: 0.75rem;
  color: var(--muted-foreground);
}

.step-list {
  list-style: none;
  padding-left: 0;
}

.step-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}

.step-number {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 9999px;
  background-color: rgba(120, 200, 230, 0.1);
  color: var(--primary);
  font-weight: 600;
}

.step-content h4 {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.step-content p {
  color: var(--muted-foreground);
  font-size: 0.875rem;
}

/* Link Styles */
a {
  color: var(--primary);
}

a:hover {
  text-decoration: underline;
}

/* Icon Styles */
.icon {
  width: 1.25rem;
  height: 1.25rem;
  display: inline-block;
  vertical-align: middle;
}

.icon-sm {
  width: 1rem;
  height: 1rem;
}

/* Pricing Box */
.pricing-box {
  background: linear-gradient(135deg, rgba(120, 200, 230, 0.05), rgba(180, 140, 230, 0.05));
  border: 1px solid rgba(120, 200, 230, 0.2);
  padding: 2rem;
  border-radius: var(--radius);
}

.price {
  font-size: 3rem;
  font-weight: 700;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.check-item svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 0.125rem;
}

/* PayPal Placeholder */
.paypal-placeholder {
  background-color: var(--muted);
  padding: 3rem 2rem;
  border-radius: var(--radius);
  text-align: center;
  border: 2px dashed var(--border);
}

/* Responsive */
@media (max-width: 767px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .section-title {
    font-size: 1.75rem;
  }
}