/* ============================================================
   TechFeedback admin — design system
   Single CSS file, vanilla, no build step.
   Brand: TechSolve blue #3E46E5 (matches the logo).
   ============================================================ */

:root {
  /* Colors — Swiss B2B palette built around TechSolve blue */
  --c-bg: #FAFAF8;            /* warm off-white canvas */
  --c-surface: #FFFFFF;
  --c-surface-2: #F5F5F1;     /* subtle nested surface */
  --c-border: #E6E6E2;
  --c-border-strong: #D4D4CE;
  --c-ink: #0B0F17;           /* deep neutral text */
  --c-text: #1A1F2B;
  --c-text-muted: #6B7280;
  --c-text-subtle: #9CA3AF;

  /* Brand */
  --c-primary: #3E46E5;        /* TechSolve blue */
  --c-primary-hover: #2F37D1;
  --c-primary-active: #232BB8;
  --c-primary-tint: #EEF0FE;
  --c-primary-on: #FFFFFF;

  /* Semantic */
  --c-success: #0F766E;
  --c-success-tint: #D1FAE5;
  --c-success-strong: #065F46;
  --c-warn: #B45309;
  --c-warn-tint: #FEF3C7;
  --c-warn-strong: #92400E;
  --c-danger: #B91C1C;
  --c-danger-tint: #FEE2E2;
  --c-danger-strong: #7F1D1D;
  --c-info-tint: #DBEAFE;
  --c-info-strong: #1E40AF;

  /* Typography — Inter via system fallback (no external load) */
  --font-sans: 'Inter', 'Inter Variable', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --fs-xs: 12px;
  --fs-sm: 13px;
  --fs-md: 14px;
  --fs-lg: 16px;
  --fs-xl: 20px;
  --fs-2xl: 28px;
  --lh-tight: 1.25;
  --lh-normal: 1.55;

  /* Spacing scale (4px grid) */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-7: 32px;
  --sp-8: 48px;
  --sp-9: 64px;

  /* Radius */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-pill: 999px;

  /* Shadow — keep minimal, prefer borders */
  --shadow-sm: 0 1px 2px rgba(11, 15, 23, 0.04);
  --shadow-md: 0 1px 2px rgba(11, 15, 23, 0.04), 0 4px 12px rgba(11, 15, 23, 0.06);
  --shadow-pop: 0 12px 32px -8px rgba(11, 15, 23, 0.18), 0 0 0 1px rgba(11, 15, 23, 0.06);

  /* Motion */
  --t-fast: 100ms cubic-bezier(.2,.8,.2,1);
  --t-base: 160ms cubic-bezier(.2,.8,.2,1);
}

/* ===== Reset / base ===== */
*, *::before, *::after { box-sizing: border-box; }
*:focus { outline: none; }
*:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
  border-radius: var(--r-xs);
}

html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  line-height: var(--lh-normal);
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv11', 'ss01', 'ss03';
}

a { color: var(--c-primary); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--c-primary-hover); text-decoration: underline; text-underline-offset: 2px; }

h1, h2, h3, h4 { color: var(--c-ink); margin: 0; line-height: var(--lh-tight); letter-spacing: -0.018em; }
h1 { font-size: var(--fs-2xl); font-weight: 600; }
h2 { font-size: var(--fs-xl); font-weight: 600; }
h3 { font-size: var(--fs-lg); font-weight: 600; letter-spacing: -0.012em; }
h4 { font-size: var(--fs-md); font-weight: 600; }

p { margin: 0; }
p + p { margin-top: var(--sp-3); }

code, .mono {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--c-surface-2);
  padding: 1px 6px;
  border-radius: var(--r-xs);
  color: var(--c-ink);
}

.muted { color: var(--c-text-muted); }
.subtle { color: var(--c-text-subtle); }
.small { font-size: var(--fs-sm); }
.required { color: var(--c-danger); margin-left: 2px; }
.inline { display: inline; margin: 0; padding: 0; }
.row { display: flex; align-items: center; gap: var(--sp-2); }
.spacer { flex: 1; }

/* ===== Layout ===== */
.container { max-width: 1100px; margin: 0 auto; padding: var(--sp-6) var(--sp-5); }

.topbar {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  padding: var(--sp-3) var(--sp-5);
  display: flex; justify-content: space-between; align-items: center;
}
.brand {
  display: flex; align-items: center; gap: var(--sp-3);
  color: var(--c-ink); text-decoration: none;
  font-size: var(--fs-md);
}
.brand:hover { text-decoration: none; }
.brand-logo { height: 24px; width: auto; display: block; }
.brand-divider { color: var(--c-border-strong); font-size: 16px; line-height: 1; }
.brand-app { color: var(--c-text); font-weight: 500; letter-spacing: -0.005em; }

.page-header {
  display: flex; justify-content: space-between; align-items: flex-end;
  margin-bottom: var(--sp-7); gap: var(--sp-4); flex-wrap: wrap;
}
.page-header h1 { margin: 0; }
.page-header p { margin-top: var(--sp-1); }

/* ===== Cards ===== */
.card,
.form-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: var(--sp-6);
  margin-bottom: var(--sp-4);
}
.card-tight { padding: var(--sp-4) var(--sp-5); }
.card h2:first-child,
.form-card h2:first-child { margin-bottom: var(--sp-4); }

/* ===== Forms ===== */
label, .label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--c-ink);
  margin-bottom: var(--sp-4);
}
label > span,
.label > span { display: block; margin-bottom: var(--sp-1); font-weight: 500; }

.input,
input[type="text"], input[type="email"], input[type="password"],
input[type="url"], input[type="search"], input[type="number"],
input[type="file"], textarea, select {
  display: block; width: 100%;
  padding: 9px 12px;
  margin-top: var(--sp-1);
  font-family: inherit; font-size: var(--fs-md);
  color: var(--c-ink);
  background: var(--c-surface);
  border: 1px solid var(--c-border-strong);
  border-radius: var(--r-sm);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
input::placeholder, textarea::placeholder { color: var(--c-text-subtle); }
input:hover, textarea:hover, select:hover { border-color: #B7B7B0; }
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(62, 70, 229, 0.15);
}
textarea { min-height: 96px; resize: vertical; line-height: 1.55; }
input[type="file"] { padding: 8px; cursor: pointer; }
.field-readonly input { background: var(--c-surface-2); cursor: text; }

.copy-row { display: flex; gap: var(--sp-2); align-items: stretch; margin-top: var(--sp-1); }
.copy-row input { flex: 1; min-width: 0; font-family: var(--font-mono); font-size: var(--fs-sm); }

fieldset { border: none; padding: 0; margin: 0 0 var(--sp-4); }
fieldset legend { font-size: var(--fs-sm); font-weight: 500; color: var(--c-ink); padding: 0 0 var(--sp-3); }

/* Card-style mode picker */
.mode-picker { display: grid; gap: var(--sp-3); }
.mode-option {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--sp-3);
  align-items: flex-start;
  padding: var(--sp-4);
  margin: 0;
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-md);
  cursor: pointer;
  background: var(--c-surface);
  transition: border-color var(--t-fast), background var(--t-fast);
}
.mode-option:hover { border-color: var(--c-border-strong); background: var(--c-surface-2); }
.mode-option input[type="radio"] {
  margin: 2px 0 0; width: 18px; height: 18px;
  accent-color: var(--c-primary);
  cursor: pointer;
}
.mode-option:has(input:checked) {
  border-color: var(--c-primary);
  background: var(--c-primary-tint);
}
.mode-option strong { display: block; color: var(--c-ink); font-weight: 600; margin-bottom: 2px; }
.mode-option .muted { font-size: var(--fs-sm); }
.mode-option .ico { color: var(--c-primary); margin-top: 2px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-2);
  padding: 8px 14px;
  font-family: inherit; font-size: var(--fs-md); font-weight: 500;
  color: var(--c-ink); background: var(--c-surface);
  border: 1px solid var(--c-border-strong); border-radius: var(--r-sm);
  cursor: pointer; text-decoration: none;
  transition: background var(--t-fast), border-color var(--t-fast), transform 60ms ease, box-shadow var(--t-fast);
  user-select: none;
  white-space: nowrap;
}
.btn:hover { background: var(--c-surface-2); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn .ico { width: 16px; height: 16px; flex-shrink: 0; }

.btn.primary {
  background: var(--c-primary); color: var(--c-primary-on);
  border-color: var(--c-primary);
}
.btn.primary:hover { background: var(--c-primary-hover); border-color: var(--c-primary-hover); }
.btn.primary:active { background: var(--c-primary-active); }

.btn.danger { color: var(--c-danger); border-color: var(--c-danger); background: var(--c-surface); }
.btn.danger:hover { background: var(--c-danger-tint); }

.btn.ghost {
  background: transparent; border-color: transparent; color: var(--c-text-muted);
  padding: 6px 10px;
}
.btn.ghost:hover { background: var(--c-surface-2); color: var(--c-ink); }

.btn.sm { padding: 6px 10px; font-size: var(--fs-sm); }
.btn.lg { padding: 11px 18px; font-size: var(--fs-md); }
.btn.full { width: 100%; }

.link {
  background: none; border: none; padding: 0;
  color: var(--c-primary); cursor: pointer;
  font-family: inherit; font-size: inherit; font-weight: 500;
  text-decoration: none;
}
.link:hover { text-decoration: underline; text-underline-offset: 2px; }

/* ===== Tables ===== */
.data-table {
  width: 100%; border-collapse: collapse;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  overflow: hidden;
}
.data-table th, .data-table td {
  padding: var(--sp-3) var(--sp-4); text-align: left;
  border-bottom: 1px solid var(--c-border);
  font-size: var(--fs-sm);
}
.data-table th {
  background: var(--c-surface-2);
  font-weight: 500;
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-text-muted);
}
.data-table tbody tr { transition: background var(--t-fast); }
.data-table tbody tr:hover { background: var(--c-surface-2); }
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tr.archived { opacity: 0.5; }
.data-table .project-link { color: var(--c-ink); display: block; text-decoration: none; }
.data-table .project-link:hover { color: var(--c-primary); text-decoration: none; }

/* ===== Status pills + badges ===== */
.badge,
.status-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 10px;
  font-size: var(--fs-xs); font-weight: 600;
  border-radius: var(--r-pill);
  white-space: nowrap;
}
.status-pill::before {
  content: ''; display: inline-block;
  width: 6px; height: 6px; border-radius: 50%;
  background: currentColor;
}
.status-pill.status-open, .badge.open { background: var(--c-info-tint); color: var(--c-info-strong); }
.status-pill.status-in_progress { background: var(--c-warn-tint); color: var(--c-warn-strong); }
.status-pill.status-resolved { background: var(--c-success-tint); color: var(--c-success-strong); }
.status-pill.status-validated { background: #F3F4F6; color: #374151; }

/* ===== Flash messages ===== */
.flash {
  padding: var(--sp-3) var(--sp-4);
  margin-bottom: var(--sp-4);
  border-radius: var(--r-sm);
  font-size: var(--fs-sm);
  border-left: 3px solid;
  display: flex; gap: var(--sp-2); align-items: center;
}
.flash-info    { background: var(--c-info-tint);    color: var(--c-info-strong);    border-color: var(--c-info-strong); }
.flash-success { background: var(--c-success-tint); color: var(--c-success-strong); border-color: var(--c-success-strong); }
.flash-error   { background: var(--c-danger-tint);  color: var(--c-danger-strong);  border-color: var(--c-danger-strong); }

/* ===== Auth ===== */
.auth-card {
  max-width: 420px; margin: 80px auto;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--sp-7);
}
.auth-card .auth-brand {
  display: flex; flex-direction: column; align-items: center; gap: var(--sp-2);
  margin-bottom: var(--sp-7);
}
.auth-card .auth-brand img { height: 32px; }
.auth-card .auth-brand .auth-app { font-size: var(--fs-sm); color: var(--c-text-muted); font-weight: 500; }
.auth-card h1 { text-align: center; margin: 0 0 var(--sp-2); font-size: var(--fs-xl); }
.auth-card p.muted { text-align: center; margin: 0 0 var(--sp-6); }
.auth-card .btn.primary { width: 100%; padding: 10px; font-size: var(--fs-md); margin-top: var(--sp-2); }

/* ===== Empty state ===== */
.empty-state {
  background: transparent;
  border: 1.5px dashed var(--c-border-strong);
  padding: var(--sp-8) var(--sp-6);
  text-align: center;
  border-radius: var(--r-md);
}
.empty-state .ico { color: var(--c-text-subtle); margin-bottom: var(--sp-4); }
.empty-state h3 { margin: 0 0 var(--sp-2); }
.empty-state p { color: var(--c-text-muted); margin: 0 0 var(--sp-5); }

/* ===== Grids ===== */
.grid { display: grid; gap: var(--sp-4); }
.grid.two-col { grid-template-columns: 1fr 1fr; }
@media (max-width: 800px) { .grid.two-col { grid-template-columns: 1fr; } }

/* ===== Comments (admin) ===== */
.comments-area { margin-top: var(--sp-7); }
.comments-area h2 { margin-bottom: var(--sp-4); }
.comment-group { margin-bottom: var(--sp-6); }
.comment-group h3 {
  font-size: var(--fs-sm); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--c-text-muted);
  margin-bottom: var(--sp-3);
}
.comment-list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--sp-2); }
.comment-item {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-left: 3px solid var(--c-border);
  border-radius: var(--r-sm);
  padding: var(--sp-3) var(--sp-4);
  transition: border-color var(--t-fast), background var(--t-fast);
}
.comment-item:hover { background: var(--c-surface-2); }
.comment-item.status-open         { border-left-color: var(--c-info-strong); }
.comment-item.status-in_progress  { border-left-color: var(--c-warn); }
.comment-item.status-resolved     { border-left-color: var(--c-success); }
.comment-item.status-validated    { border-left-color: #9CA3AF; opacity: 0.7; }
.comment-header {
  display: flex; justify-content: space-between; align-items: center; gap: var(--sp-2);
  flex-wrap: wrap; margin-bottom: var(--sp-1);
}
.comment-page { font-size: var(--fs-xs); }
.comment-text { margin: var(--sp-1) 0; line-height: 1.5; white-space: pre-wrap; word-wrap: break-word; }
.comment-text.big { font-size: var(--fs-lg); margin: var(--sp-3) 0; line-height: 1.6; }
.comment-meta {
  display: flex; justify-content: space-between; align-items: center;
  gap: var(--sp-3); margin-top: var(--sp-2);
}

/* Replies (admin comment detail) */
.reply-list { list-style: none; padding: 0; margin: 0 0 var(--sp-4); display: grid; gap: var(--sp-2); }
.reply {
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--r-sm);
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
}
.reply.author-admin { background: var(--c-primary-tint); border-color: rgba(62, 70, 229, 0.2); }
.reply-header {
  display: flex; gap: var(--sp-2); justify-content: space-between; align-items: baseline;
  margin-bottom: var(--sp-1);
}
.reply p { margin: 0; white-space: pre-wrap; word-wrap: break-word; font-size: var(--fs-sm); line-height: 1.55; }
.reply-form textarea { width: 100%; }
.reply-form button { margin-top: var(--sp-2); }

.inline-form { display: flex; gap: var(--sp-2); align-items: center; flex-wrap: wrap; margin-top: var(--sp-3); }
.inline-form select { width: auto; padding: 6px 10px; }

/* ===== Created project page (the share link reveal) ===== */
.created-hero {
  text-align: center;
  padding: var(--sp-7) 0 var(--sp-6);
  border-bottom: 1px solid var(--c-border);
  margin-bottom: var(--sp-6);
}
.created-hero .check {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--c-success-tint); color: var(--c-success-strong);
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: var(--sp-4);
}

/* ===== Landing page (/) ===== */
.landing {
  min-height: 100vh;
  display: flex; flex-direction: column;
  padding: var(--sp-7) var(--sp-5);
  max-width: 980px; margin: 0 auto;
}
.landing-hero { text-align: center; padding: var(--sp-9) 0 var(--sp-8); }
.landing-logo { display: inline-block; margin-bottom: var(--sp-5); }
.landing-hero h1 { font-size: 36px; margin-bottom: var(--sp-3); letter-spacing: -0.022em; }
.landing-tagline { font-size: var(--fs-lg); color: var(--c-text-muted); max-width: 480px; margin: 0 auto; line-height: 1.5; }
.landing-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-5); margin-bottom: var(--sp-8); flex: 1; }
.landing-card {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--r-lg); padding: var(--sp-6);
  display: flex; flex-direction: column; gap: var(--sp-3);
}
.landing-card-ico {
  width: 44px; height: 44px; border-radius: var(--r-md);
  background: var(--c-primary-tint); color: var(--c-primary);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--sp-2);
}
.landing-card h2 { font-size: var(--fs-lg); margin: 0; }
.landing-card p { color: var(--c-text-muted); font-size: var(--fs-md); flex: 1; }
.landing-card .btn { align-self: flex-start; margin-top: var(--sp-2); }
.landing-footer { text-align: center; padding: var(--sp-5) 0; border-top: 1px solid var(--c-border); }

@media (max-width: 720px) {
  .landing-grid { grid-template-columns: 1fr; }
  .landing-hero h1 { font-size: 28px; }
}

/* ===== Mobile ===== */
@media (max-width: 720px) {
  .container { padding: var(--sp-5) var(--sp-4); }
  .topbar { padding: var(--sp-3) var(--sp-4); }
  .page-header { gap: var(--sp-3); }
  .page-header h1 { font-size: 22px; }
  .form-card, .card { padding: var(--sp-5); }
  .auth-card { margin: var(--sp-7) auto; padding: var(--sp-6); }
  .data-table th, .data-table td { padding: var(--sp-3); font-size: var(--fs-sm); }
}
@media (max-width: 540px) {
  .page-header { flex-direction: column; align-items: stretch; }
  .page-header > a.btn { align-self: flex-start; }
  /* On very small screens convert the dashboard table to stacked rows */
  .data-table thead { display: none; }
  .data-table, .data-table tbody, .data-table tr, .data-table td { display: block; width: 100%; }
  .data-table tr { padding: var(--sp-3); border-bottom: 1px solid var(--c-border); }
  .data-table td { padding: var(--sp-1) 0; border: none; }
  .data-table td::before { content: attr(data-label); display: inline-block; min-width: 90px; color: var(--c-text-muted); font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: 0.06em; margin-right: var(--sp-2); }
  .data-table td:first-child::before { display: none; }
}