/* ============================================
   Ludiq Secure Messenger — Shared Stylesheet
   ============================================ */

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

:root {
  --color-accent: #eb4900;
  --color-accent-hover: #d14000;
  --color-bg: #ffffff;
  --color-bg-alt: #faf8f7;
  --color-text: #2c2c2c;
  --color-text-light: #6b6b6b;
  --color-warm-gray: #e1dcd9;
  --color-warm-gray-light: #f6f1ed;
  --color-border: #e8e4e1;
  --font-sans: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Consolas", monospace;
  --max-width: 960px;
  --radius: 12px;
  --radius-sm: 8px;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Header --- */
.site-header {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.92);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header .logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
}

.site-header .logo img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-header nav a {
  color: var(--color-text-light);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.site-header nav a:hover {
  color: var(--color-accent);
}

/* --- Hero / Banner --- */
.hero {
  text-align: center;
  padding: 64px 0 48px;
}

.hero .banner {
  border-radius: var(--radius);
  margin-bottom: 40px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  line-height: 1.2;
}

.hero h1 .accent {
  color: var(--color-accent);
}

.hero .tagline {
  font-size: 1.15rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero .cta-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(235, 73, 0, 0.3);
}

.btn-outline {
  border: 2px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
}

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

/* --- Section --- */
.section {
  padding: 64px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  color: var(--color-text-light);
  margin-bottom: 40px;
  font-size: 1.05rem;
}

/* --- Feature Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.feature-card .icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--color-text-light);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* --- Principles List --- */
.principles-list {
  list-style: none;
  display: grid;
  gap: 16px;
}

.principles-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.principles-list .bullet {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}

.principles-list strong {
  display: block;
  margin-bottom: 2px;
}

.principles-list span {
  color: var(--color-text-light);
  font-size: 0.92rem;
}

/* --- Server Info Box --- */
.server-info {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  margin-top: 40px;
}

.server-info h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.server-info .server-url {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  margin: 8px 0;
  color: var(--color-accent);
  font-weight: 600;
}

.server-info .username {
  margin-top: 8px;
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.server-info .username strong {
  color: var(--color-text);
}

/* --- Clients Section --- */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.client-card {
  text-align: center;
  padding: 40px 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.client-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.client-card .icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.client-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.client-card p {
  color: var(--color-text-light);
  font-size: 0.92rem;
  margin-bottom: 16px;
}

.client-card .badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-testing {
  background: #fff3e0;
  color: #e65100;
}

.badge-open {
  background: #e8f5e9;
  color: #2e7d32;
}

/* --- Footer --- */
.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-light);
  font-size: 0.88rem;
}

.site-footer .footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.site-footer .footer-links a {
  color: var(--color-text-light);
  font-weight: 500;
}

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

.site-footer .copyright {
  margin-top: 8px;
}

/* --- Code / Mono --- */
code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-warm-gray-light);
  padding: 2px 8px;
  border-radius: 4px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .hero .tagline {
    font-size: 1rem;
  }

  .section {
    padding: 48px 0;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .site-header nav {
    gap: 16px;
  }

  .site-header nav a {
    font-size: 0.82rem;
  }

  .features-grid,
  .clients-grid {
    grid-template-columns: 1fr;
  }

  .hero .cta-group {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.5rem;
  }

  .site-header .container {
    flex-direction: column;
    gap: 12px;
  }

  .container {
    padding: 0 16px;
  }
}