/* ==========================================================================
   Swiss Design System -- Holler
   International Typographic Style: grid, type, whitespace, restraint
   ========================================================================== */

/* Customize -- change these tokens in :root to match your brand:
   --font-sans      Font stack         "Inter", "Helvetica Neue", …
   --color-accent   Primary action     #e53935
   --color-bg       Background         #ffffff
   --color-text     Body text          #111111
   --radius         Border radius      2px  (try 8px for rounded)
   --max-width      Content width      720px                         */

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

/* Design Tokens -- Light (default) */
:root {
  /* Typography */
  --font-sans: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;

  /* Type Scale (Major Third 1.250) */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;

  /* Spacing (4px baseline grid) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Layout */
  --max-width: 720px;
  --radius: 2px;

  /* Colors -- Light */
  --color-bg: #ffffff;
  --color-text: #111111;
  --color-text-muted: #6b6b6b;
  --color-accent: #e53935;
  --color-accent-hover: #c62828;
  --color-border: #e0e0e0;
}

/* Design Tokens -- Dark */
.theme-dark {
  --color-bg: #121212;
  --color-text: #e8e8e8;
  --color-text-muted: #9e9e9e;
  --color-accent: #ef5350;
  --color-accent-hover: #e53935;
  --color-border: #2e2e2e;
}

/* Base */
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--text-base);
  line-height: 1.5;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-12) var(--space-4);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Header */
header {
  margin-bottom: var(--space-12);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  margin-bottom: var(--space-2);
}

header a {
  text-decoration: none;
  color: inherit;
}

header h1 {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
}

header p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  letter-spacing: 0.01em;
}

/* Theme Toggle -- Light Switch */
.theme-toggle {
  --toggle-size: 32px;
  flex-shrink: 0;
}

.theme-switch {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  border-radius: var(--radius);
}

.theme-switch:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.theme-switch-track {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  width: calc(var(--toggle-size) * 2);
  height: var(--toggle-size);
  padding: 0 calc(var(--toggle-size) * 0.22);
  box-sizing: border-box;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color 0.2s ease;
}

.theme-switch:hover .theme-switch-track {
  border-color: var(--color-text-muted);
}

.theme-switch:active .theme-switch-track,
.theme-switch:focus .theme-switch-track {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent);
  transition: none;
}

.theme-switch-knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: calc(var(--toggle-size) - 4px);
  height: calc(var(--toggle-size) - 6px);
  background: var(--color-border);
  border-radius: var(--radius);
  transition: transform 0.2s ease, background-color 0.2s ease;
  z-index: 0;
}

.theme-dark .theme-switch-knob {
  transform: translateX(calc(var(--toggle-size) - 2px));
  background: var(--color-text-muted);
}

.theme-switch-sun,
.theme-switch-moon {
  position: relative;
  z-index: 1;
  display: block;
  width: calc(var(--toggle-size) / 2);
  height: calc(var(--toggle-size) / 2);
  transition: color 0.2s ease, opacity 0.2s ease;
}

.theme-switch-sun {
  color: var(--color-text-muted);
}

.theme-dark .theme-switch-sun {
  opacity: 0.4;
}

.theme-switch-moon {
  color: var(--color-text-muted);
  opacity: 0.4;
}

.theme-dark .theme-switch-moon {
  color: var(--color-text);
  opacity: 1;
}

/* Post Cards */
.post-card {
  display: flex;
  gap: var(--space-6);
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border);
}

.post-card:last-child {
  padding-bottom: 0;
}

.post-content {
  flex: 1;
  min-width: 0;
}

.post-title {
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-1);
}

.post-description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: var(--space-3);
}

.post-meta {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* Vote Button */
.vote-form {
  flex-shrink: 0;
}

.vote-button {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  background: none;
  border: none;
  padding: 0 var(--space-3);
  cursor: pointer;
  min-width: 48px;
  color: var(--color-text-muted);
  transition: color 0.15s ease;
}

.vote-button:hover {
  color: var(--color-accent);
}

.vote-button.voted {
  color: var(--color-accent);
}

.vote-arrow {
  font-size: var(--text-sm);
  line-height: 1;
}

.vote-count {
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}

/* Form */
.post-form {
  border-top: 2px solid var(--color-text);
  padding: var(--space-6) 0;
  margin-bottom: var(--space-8);
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-group label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
  color: var(--color-text-muted);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: var(--text-base);
  font-family: inherit;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.15s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-text);
}

.form-group input:focus-visible,
.form-group textarea:focus-visible {
  border-color: var(--color-text);
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.form-group input:focus:not(:focus-visible),
.form-group textarea:focus:not(:focus-visible) {
  outline: none;
}

.form-group textarea {
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}

.post-form button[type="submit"] {
  background: var(--color-accent);
  color: #ffffff;
  border: none;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.post-form button[type="submit"]:hover {
  background: var(--color-accent-hover);
}

/* Status Badges */
.status-badge {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.075em;
  border-radius: var(--radius);
}

.status-open {
  background: none;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.status-planned {
  background: none;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.status-in_progress {
  background: var(--color-accent);
  color: #ffffff;
  border: 1px solid var(--color-accent);
}

.status-done {
  background: none;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  text-decoration: line-through;
}

.status-closed {
  background: none;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  opacity: 0.6;
}

/* Controls */
.controls {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.controls input[type="search"] {
  flex: 1;
  min-width: 200px;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-family: inherit;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.15s ease;
}

.controls input[type="search"]:focus {
  border-color: var(--color-text);
}

.controls input[type="search"]:focus-visible {
  border-color: var(--color-text);
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.controls input[type="search"]:focus:not(:focus-visible) {
  outline: none;
}

.controls input[type="search"]::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}

.controls select {
  padding: var(--space-3) var(--space-12) var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-family: inherit;
  appearance: none;
  background: var(--color-bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1.5l5 5 5-5' stroke='%239E9E9E' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat right var(--space-4) center;
  color: var(--color-text);
  cursor: pointer;
  transition: border-color 0.15s ease;
}

.controls select:focus {
  border-color: var(--color-text);
}

.controls select:focus-visible {
  border-color: var(--color-text);
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.controls select:focus:not(:focus-visible) {
  outline: none;
}

.theme-dark .controls select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1.5l5 5 5-5' stroke='%23BDBDBD' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

/* Admin Controls */
.admin-controls {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-3);
  align-items: center;
}

.admin-controls select {
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: var(--text-xs);
  font-family: inherit;
  background: var(--color-bg);
  color: var(--color-text);
}

.noscript-submit {
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: var(--text-xs);
  font-family: inherit;
  cursor: pointer;
  background: var(--color-bg);
  color: var(--color-text);
}

.delete-button {
  background: none;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius);
  font-size: var(--text-xs);
  font-family: inherit;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.delete-button:hover {
  background: var(--color-accent);
  color: #ffffff;
}

/* Empty State */
.empty-state {
  color: var(--color-text-muted);
  padding: var(--space-16) var(--space-4);
  font-size: var(--text-sm);
  border-top: 1px solid var(--color-border);
}

/* Error */
.error {
  color: var(--color-accent);
  font-size: var(--text-sm);
  padding: var(--space-2);
}

/* Footer */
footer {
  margin-top: var(--space-16);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

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

footer a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Phase 3: Polish -- Accessibility, Reduced Motion, Progressive Enhancement
   ========================================================================== */

/* Focus Indicators -- WCAG 2.4.13 */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Remove default outline for mouse/touch users */
:focus:not(:focus-visible) {
  outline: none;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* Progressive Enhancement */
.js-enabled .noscript-submit {
  display: none;
}

/* Responsive */
@media (max-width: 480px) {
  body {
    padding: var(--space-6) var(--space-4);
  }

  header {
    margin-bottom: var(--space-8);
  }

  header h1 {
    font-size: var(--text-xl);
  }

  .post-card {
    gap: var(--space-4);
  }

  .vote-count {
    font-size: var(--text-lg);
  }

  .controls {
    gap: var(--space-2);
  }
}