/*
 * Custom CSS for the static purple1.ai landing page.
 *
 * This stylesheet replaces the original Tailwind CSS utilities with
 * handcrafted styles that mirror the dark, purple‑accented aesthetic of
 * the original React site. It is completely self‑contained and does
 * not rely on any external fonts or stylesheets, ensuring the page
 * renders correctly when hosted on a simple HTTP server.
 */

/* Colour palette definitions for easy customisation */
:root {
  --color-dark: #030712;          /* Tailwind gray‑950 */
  --color-gray: #111827;          /* Tailwind gray‑900 */
  --color-border: #1f2937;        /* Tailwind gray‑800 */
  --color-light: #f3f4f6;         /* Tailwind gray‑100 */
  --color-muted: #9ca3af;         /* Tailwind gray‑400 */
  --color-accent-start: #7e22ce;  /* Tailwind purple‑600 */
  --color-accent-end: #a855f7;    /* Tailwind purple‑400 */
  --card-bg-alpha: 0.75;          /* opacity for translucent card backgrounds */
}

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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Helvetica, Arial, sans-serif;
  line-height: 1.5;
  background-color: var(--color-dark);
  color: var(--color-light);
  scroll-behavior: smooth;
}

/* Generic container to constrain width */
.container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(3, 7, 18, 0.8);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
}
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
}
.logo .icon {
  width: 2rem;
  height: 2rem;
  border-radius: 0.5rem;
  background-image: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-dark);
  font-weight: 800;
}
.logo span {
  background-image: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nav {
  display: none;
  gap: 2rem;
}
.nav a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s ease;
}
.nav a:hover {
  color: var(--color-light);
}
.cta-btn {
  display: none;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  font-weight: 500;
  font-size: 0.875rem;
  background-image: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
  color: var(--color-dark);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}
@media (min-width: 768px) {
  .nav {
    display: flex;
  }
}
@media (min-width: 640px) {
  .cta-btn {
    display: inline-block;
  }
}

/* Hero section */
.hero {
  padding-top: 6rem;
  padding-bottom: 4rem;
  background-image: linear-gradient(to bottom right, var(--color-gray), var(--color-dark), var(--color-gray));
  overflow: hidden;
}
.hero .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}
.hero .title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.2;
}
.hero .title span {
  background-image: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero .subtitle {
  font-size: 1.125rem;
  color: var(--color-muted);
  max-width: 30rem;
  margin-top: 1rem;
}
.hero .buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}
.hero .buttons a {
  padding: 0.75rem 1.5rem;
  border-radius: 0.375rem;
  font-weight: 500;
  font-size: 0.875rem;
  text-decoration: none;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.hero .buttons a.primary {
  background-image: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
  color: var(--color-dark);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}
.hero .buttons a.primary:hover {
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}
.hero .buttons a.secondary {
  border: 1px solid var(--color-accent-start);
  color: var(--color-accent-end);
  background-color: transparent;
}
.hero .image img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 1rem;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
}
@media (min-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr 1fr;
  }
  .hero .title {
    font-size: 3rem;
  }
}

/* Generic section styles */
.section {
  padding-top: 4rem;
  padding-bottom: 4rem;
}
.heading {
  text-align: center;
  margin-bottom: 2.5rem;
}
.heading h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}
.heading h2 span {
  background-image: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.heading p {
  font-size: 1rem;
  color: var(--color-muted);
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}

/* Services section */
.services .grid {
  display: grid;
  gap: 2rem;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}
@media (min-width: 768px) {
  .services .grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .services .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.card {
  background-color: rgba(17, 24, 39, var(--card-bg-alpha));
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover {
  box-shadow: 0 8px 15px rgba(130, 87, 230, 0.3);
  transform: translateY(-4px);
}
.card .icon-box {
  width: 4rem;
  height: 4rem;
  margin: 0 auto 1.5rem;
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
}
.card .icon-box img {
  width: 2rem;
  height: 2rem;
  object-fit: contain;
}
.card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
}
.card p {
  font-size: 0.875rem;
  color: var(--color-muted);
}
.services .center {
  text-align: center;
  margin-top: 2rem;
}

/* Process section */
.process .grid {
  display: grid;
  gap: 2rem;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}
@media (min-width: 768px) {
  .process .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.step {
  position: relative;
  background-color: rgba(17, 24, 39, var(--card-bg-alpha));
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.step:hover {
  box-shadow: 0 8px 15px rgba(130, 87, 230, 0.3);
  transform: translateY(-4px);
}
.step .number {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 3rem;
  font-weight: 700;
  color: rgba(115, 77, 191, 0.15);
  user-select: none;
}
.step .icon-box {
  width: 5rem;
  height: 5rem;
  margin: 0 auto 1.5rem;
  border-radius: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
}
.step .icon-box img {
  width: 2.5rem;
  height: 2.5rem;
  object-fit: contain;
}
.step h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
}
.step p {
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* Benefits section */
.benefits .grid {
  display: grid;
  gap: 2rem;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}
@media (min-width: 768px) {
  .benefits .grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .benefits .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.benefit {
  background-color: rgba(17, 24, 39, var(--card-bg-alpha));
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  padding: 1.5rem;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.benefit:hover {
  box-shadow: 0 8px 15px rgba(130, 87, 230, 0.3);
  transform: translateY(-4px);
}
.benefit .icon-box {
  width: 3rem;
  height: 3rem;
  border-radius: 0.75rem;
  background-image: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--color-dark);
  font-weight: 700;
  font-size: 1rem;
}
.benefit h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}
.benefit p {
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* Contact section */
.contact {
  padding-top: 4rem;
  padding-bottom: 4rem;
  background-image: linear-gradient(to bottom right, var(--color-gray), var(--color-dark), var(--color-gray));
  position: relative;
  overflow: hidden;
}
.contact .container {
  text-align: center;
}
.contact h2 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
.contact h2 span {
  background-image: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.contact p {
  font-size: 1.125rem;
  color: var(--color-muted);
  max-width: 40rem;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 2rem;
}
.contact .contact-btn {
  padding: 0.75rem 1.5rem;
  border-radius: 0.375rem;
  font-weight: 500;
  font-size: 0.875rem;
  background-image: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
  color: var(--color-dark);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.contact .contact-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}
.contact .cards {
  display: grid;
  gap: 2rem;
  margin-top: 3rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
@media (min-width: 768px) {
  .contact .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}
.contact-card {
  background-color: rgba(17, 24, 39, var(--card-bg-alpha));
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
  backdrop-filter: blur(4px);
}
.contact-card .icon {
  width: 3rem;
  height: 3rem;
  border-radius: 0.75rem;
  background-image: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  color: var(--color-dark);
  font-weight: 700;
  font-size: 1.25rem;
}
.contact-card h3 {
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.contact-card p {
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* Footer */
.footer {
  background-color: var(--color-dark);
  border-top: 1px solid var(--color-border);
  padding-top: 3rem;
  padding-bottom: 3rem;
}
.footer .container {
  display: grid;
  gap: 2rem;
}
@media (min-width: 768px) {
  .footer .container {
    grid-template-columns: repeat(4, 1fr);
  }
}
.footer .brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.footer .brand .icon {
  width: 2rem;
  height: 2rem;
  border-radius: 0.5rem;
  background-image: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-dark);
  font-weight: 800;
}
.footer .brand span {
  font-size: 1.25rem;
  font-weight: 700;
  background-image: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.footer p {
  font-size: 0.875rem;
  color: var(--color-muted);
  max-width: 15rem;
  line-height: 1.4;
}
.footer h3 {
  font-weight: 600;
  margin-bottom: 0.75rem;
}
.footer ul {
  list-style: none;
}
.footer li {
  margin-bottom: 0.5rem;
}
.footer a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s ease;
}
.footer a:hover {
  color: var(--color-light);
}
.footer .copyright {
  border-top: 1px solid var(--color-border);
  margin-top: 2rem;
  padding-top: 1.5rem;
  text-align: center;
  color: #6b7280;
  font-size: 0.75rem;
}