/* ==========================================================================
   Samayna – Project Portfolio
   Single stylesheet for the entire site.
   ========================================================================== */

/* --- Custom Properties --------------------------------------------------- */
:root {
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-text: #1a1a2e;
  --color-text-muted: #5a5a7a;
  --color-primary: #4361ee;
  --color-primary-hover: #3a56d4;
  --color-border: #e2e4e9;
  --color-shadow: rgba(0, 0, 0, 0.06);

  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  --radius: 10px;
  --max-width: 1100px;
  --legal-max-width: 700px;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-stack);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

/* --- Layout -------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

main {
  flex: 1;
}

/* --- Header -------------------------------------------------------------- */
.site-header {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

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

.site-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.site-title a {
  color: inherit;
  text-decoration: none;
}

.back-link {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.back-link:hover {
  color: var(--color-primary);
}

/* --- Footer -------------------------------------------------------------- */
.site-footer {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-top: var(--space-3xl);
}

/* --- Project Grid (Homepage) --------------------------------------------- */
.page-intro {
  padding: var(--space-2xl) 0 var(--space-lg);
}

.page-intro h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.page-intro p {
  color: var(--color-text-muted);
  max-width: 480px;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
  padding-bottom: var(--space-2xl);
}

.project-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  color: var(--color-text);
  text-decoration: none;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.project-card:hover {
  box-shadow: 0 4px 20px var(--color-shadow);
  transform: translateY(-2px);
  text-decoration: none;
}

.project-card-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), #7c3aed);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.project-card-name {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.project-card-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  flex: 1;
  margin-bottom: var(--space-md);
}

.platform-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: var(--space-xs) var(--space-sm);
  align-self: flex-start;
}

/* --- Project Detail ------------------------------------------------------ */
.project-hero {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-2xl) 0 var(--space-lg);
}

.project-hero-icon {
  width: 80px;
  height: 80px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--color-primary), #7c3aed);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 2rem;
  font-weight: 700;
  flex-shrink: 0;
}

.project-hero-info h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.project-hero-info .platform-badge {
  margin-top: var(--space-xs);
}

.project-about {
  padding: var(--space-lg) 0;
}

.project-about h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.project-about p {
  color: var(--color-text-muted);
  max-width: 640px;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  padding: var(--space-lg) 0 var(--space-2xl);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s ease;
}

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

.btn-primary:hover {
  background: var(--color-primary-hover);
  text-decoration: none;
}

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

.btn-outline:hover {
  background: var(--color-bg);
  text-decoration: none;
}

/* --- Legal Pages --------------------------------------------------------- */
.legal-page {
  max-width: var(--legal-max-width);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-md);
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

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

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

.legal-page h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.legal-page .last-updated {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2xl);
}

.legal-page h2 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.legal-page p,
.legal-page ul {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.legal-page ul {
  padding-left: var(--space-lg);
}

.legal-page li {
  margin-bottom: var(--space-sm);
}

/* --- 404 Page ------------------------------------------------------------ */
.error-page {
  text-align: center;
  padding: var(--space-3xl) var(--space-md);
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.error-page h1 {
  font-size: 4rem;
  font-weight: 800;
  color: var(--color-border);
  line-height: 1;
  margin-bottom: var(--space-md);
}

.error-page p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  font-size: 1.1rem;
}

/* --- Responsive ---------------------------------------------------------- */
@media (min-width: 640px) {
  .page-intro h1 {
    font-size: 2rem;
  }

  .project-hero-info h1 {
    font-size: 2rem;
  }

  .site-header {
    padding: var(--space-xl) 0;
  }
}

@media (min-width: 960px) {
  .container {
    padding: 0 var(--space-xl);
  }

  .page-intro {
    padding: var(--space-3xl) 0 var(--space-xl);
  }

  .page-intro h1 {
    font-size: 2.25rem;
  }
}