/* ==========================================================================
   Retra – Design System & Application Stylesheet
   Pure Vanilla CSS – Fast, Accessible, No 3rd-party dependencies
   ========================================================================== */

:root {
  color-scheme: light;
  
  /* Palette: Nordic Slate & Deep Teal */
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --slate-950: #020617;

  --teal-50: #f0fdfa;
  --teal-100: #ccfbf1;
  --teal-200: #99f6e4;
  --teal-300: #5eead4;
  --teal-500: #14b8a6;
  --teal-600: #0d9488;
  --teal-700: #0f766e;
  --teal-800: #115e59;
  --teal-900: #134e4a;
  --teal-950: #042f2e;

  --amber-50: #fffbeb;
  --amber-100: #fef3c7;
  --amber-500: #f59e0b;
  --amber-700: #b45309;

  --red-50: #fef2f2;
  --red-100: #fee2e2;
  --red-600: #dc2626;
  --red-700: #b91c1c;

  --emerald-50: #ecfdf5;
  --emerald-600: #059669;
  --emerald-700: #047857;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;

  /* Elevation */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

  /* Radius */
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;
}

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

html {
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  background-color: var(--slate-50);
  color: var(--slate-900);
  min-height: 100vh;
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  color: var(--slate-950);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

p {
  line-height: 1.6;
  color: var(--slate-700);
}

a {
  color: var(--teal-700);
  text-decoration: none;
  transition: color 0.15s ease, opacity 0.15s ease;
}

a:hover {
  color: var(--teal-900);
}

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

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

/* Layout Utilities */
.mx-auto { margin-left: auto; margin-right: auto; }
.w-full { width: 100%; }
.min-w-56 { min-width: 14rem; }

.max-w-xs { max-width: 20rem; }
.max-w-sm { max-width: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }

.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-5 { padding-left: 1.25rem; padding-right: 1.25rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.py-10 { padding-top: 2.5rem; padding-bottom: 2.5rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }

.p-4 { padding: 1rem; }
.p-5 { padding: 1.25rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-10 { margin-bottom: 2.5rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }

.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-5 { gap: 1.25rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.gap-10 { gap: 2.5rem; }

.space-y-1 > * + * { margin-top: 0.25rem; }
.space-y-2 > * + * { margin-top: 0.5rem; }
.space-y-3 > * + * { margin-top: 0.75rem; }
.space-y-4 > * + * { margin-top: 1rem; }
.space-y-5 > * + * { margin-top: 1.25rem; }
.space-y-6 > * + * { margin-top: 1.5rem; }
.space-y-8 > * + * { margin-top: 2rem; }
.space-y-10 > * + * { margin-top: 2.5rem; }

/* Display & Flexbox/Grid */
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1 1 0%; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }

.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }

@media (min-width: 640px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* Typography Utilities */
.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-base { font-size: 1rem; line-height: 1.5rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
.text-4xl { font-size: 2.25rem; line-height: 2.5rem; }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.uppercase { text-transform: uppercase; }
.tracking-tight { letter-spacing: -0.025em; }
.tracking-wide { letter-spacing: 0.025em; }
.tracking-wider { letter-spacing: 0.05em; }
.tracking-widest { letter-spacing: 0.1em; }
.tracking-\[0\.2em\] { letter-spacing: 0.2em; }

.no-underline { text-decoration: none; }
.underline { text-decoration: underline; }

/* Color Utilities */
.text-slate-950 { color: var(--slate-950); }
.text-slate-900 { color: var(--slate-900); }
.text-slate-800 { color: var(--slate-800); }
.text-slate-700 { color: var(--slate-700); }
.text-slate-600 { color: var(--slate-600); }
.text-slate-500 { color: var(--slate-500); }
.text-slate-400 { color: var(--slate-400); }

.text-teal-700 { color: var(--teal-700); }
.text-teal-800 { color: var(--teal-800); }
.text-teal-900 { color: var(--teal-900); }
.text-white { color: #ffffff; }

.hover\:text-white:hover { color: #ffffff; }
.hover\:text-teal-900:hover { color: var(--teal-900); }

.bg-white { background-color: #ffffff; }
.bg-slate-50 { background-color: var(--slate-50); }
.bg-slate-100 { background-color: var(--slate-100); }
.bg-slate-200 { background-color: var(--slate-200); }
.bg-teal-50 { background-color: var(--teal-50); }
.bg-teal-100 { background-color: var(--teal-100); }
.bg-teal-700 { background-color: var(--teal-700); }
.bg-teal-800 { background-color: var(--teal-800); }
.bg-teal-900 { background-color: var(--teal-900); }
.bg-amber-50 { background-color: var(--amber-50); }
.bg-red-50 { background-color: var(--red-50); }

.hover\:bg-teal-800:hover { background-color: var(--teal-800); }
.hover\:bg-teal-900:hover { background-color: var(--teal-900); }

.border { border-width: 1px; border-style: solid; }
.border-t { border-top-width: 1px; border-top-style: solid; }
.border-b { border-bottom-width: 1px; border-bottom-style: solid; }

.border-slate-200 { border-color: var(--slate-200); }
.border-slate-300 { border-color: var(--slate-300); }
.border-slate-400 { border-color: var(--slate-400); }
.border-teal-200 { border-color: var(--teal-200); }
.border-teal-700 { border-color: var(--teal-700); }
.border-amber-400 { border-color: var(--amber-500); }

.hover\:border-slate-400:hover { border-color: var(--slate-400); }

.rounded-lg { border-radius: var(--radius-md); }
.rounded-xl { border-radius: var(--radius-lg); }
.rounded-2xl { border-radius: var(--radius-xl); }
.rounded-3xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow); }
.shadow-md { box-shadow: var(--shadow-md); }

/* Buttons & Interactive Elements */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-xl);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  background-color: var(--teal-700);
  color: #ffffff;
  transition: all 0.15s ease-in-out;
  line-height: 1.25;
}

.btn:hover {
  background-color: var(--teal-800);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn:active {
  transform: translateY(0);
  background-color: var(--teal-900);
}

.btn.secondary, .btn-secondary {
  background-color: #ffffff;
  color: var(--slate-800);
  border-color: var(--slate-300);
}

.btn.secondary:hover, .btn-secondary:hover {
  background-color: var(--slate-50);
  border-color: var(--slate-400);
  color: var(--slate-950);
}

.btn.danger,
.btn-danger,
button.btn.danger,
button.danger {
  background-color: #dc2626 !important;
  color: #ffffff !important;
  border: 1px solid #dc2626 !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  padding: 0.75rem 1.25rem !important;
  font-size: 1rem !important;
  font-weight: 600 !important;
  border-radius: var(--radius-xl) !important;
  cursor: pointer !important;
  text-decoration: none !important;
  transition: all 0.15s ease-in-out !important;
}

.btn.danger:hover,
.btn-danger:hover,
button.btn.danger:hover,
button.danger:hover {
  background-color: #b91c1c !important;
  border-color: #b91c1c !important;
  color: #ffffff !important;
  box-shadow: var(--shadow) !important;
}

.btn.danger:active,
.btn-danger:active,
button.btn.danger:active,
button.danger:active {
  background-color: #991b1b !important;
  border-color: #991b1b !important;
  color: #ffffff !important;
}

/* Form Inputs */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
textarea,
select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  color: var(--slate-900);
  background-color: #ffffff;
  border: 1px solid var(--slate-300);
  border-radius: var(--radius-lg);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus, textarea:focus, select:focus {
  border-color: var(--teal-700);
  box-shadow: 0 0 0 3px var(--teal-100);
}

/* Card Component */
.card {
  background-color: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-2xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
  border-color: var(--slate-300);
}

/* App Header & Navbar */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--slate-200);
}

@media (max-width: 640px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--slate-950);
  text-decoration: none;
}

.brand-mark,
.brand-mark-svg {
  width: 2rem;
  height: 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-mark {
  background-color: var(--teal-700);
  color: #ffffff;
  border-radius: 0.5rem;
  font-size: 1.1rem;
  font-weight: 700;
}

.brand-name {
  font-weight: 800;
  color: var(--slate-950);
}

.header-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
}

.header-nav a {
  color: var(--teal-800);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.15s ease;
}

.header-nav a:hover {
  color: var(--teal-950);
  text-decoration: underline;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.3125rem 0.625rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--slate-600);
  background-color: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all 0.15s ease;
}

.lang-switch:hover {
  color: var(--teal-900);
  border-color: var(--teal-400);
  background-color: var(--teal-50);
}

.lang-icon {
  display: inline-block;
  flex-shrink: 0;
  color: var(--slate-400);
  transition: color 0.15s ease;
}

.lang-switch:hover .lang-icon {
  color: var(--teal-700);
}

.header-nav a.danger-link {
  color: var(--slate-500);
  font-weight: 500;
}

.header-nav a.danger-link:hover {
  color: var(--rose-600);
}

.header-nav form {
  display: inline-flex;
  align-items: center;
  margin: 0;
}

.header-nav button,
.header-nav .nav-button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--teal-800);
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  transition: color 0.15s ease;
}

.header-nav button:hover,
.header-nav .nav-button:hover {
  color: var(--teal-950);
  text-decoration: underline;
}

.header-nav button.danger-link,
.header-nav .nav-button.danger-link {
  color: var(--slate-500);
  font-weight: 500;
}

.header-nav button.danger-link:hover,
.header-nav .nav-button.danger-link:hover {
  color: var(--rose-600);
}

/* Hero & Landing Features */
.hero-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.finder-hero-box {
  background: linear-gradient(180deg, var(--teal-50) 0%, #ffffff 100%);
  border: 1.5px solid var(--teal-200);
  border-radius: var(--radius-2xl);
  padding: 1.75rem;
  box-shadow: var(--shadow);
}

.contrast-banner {
  background-color: #ffffff;
  border-left: 4px solid var(--teal-700);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow-sm);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--slate-900);
}

.step-card {
  background-color: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  box-shadow: var(--shadow-sm);
}

.step-number {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--teal-700);
}

/* Thread chat bubbles in /konto */
.chat-bubble {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-xl);
  max-width: 85%;
  line-height: 1.5;
}

.chat-bubble.owner {
  background-color: var(--teal-700);
  color: #ffffff;
  margin-left: auto;
  border-bottom-right-radius: 0.25rem;
}

.chat-bubble.finder {
  background-color: #ffffff;
  border: 1px solid var(--slate-200);
  color: var(--slate-900);
  margin-right: auto;
  border-bottom-left-radius: 0.25rem;
}

/* Footer */
.site-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--slate-200);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  color: var(--slate-500);
  font-size: 0.875rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.footer-links a {
  color: var(--slate-600);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--teal-800);
  text-decoration: underline;
}