/* ═══════════════════════════════════════════════════════
   FIX-KIT DESIGN SYSTEM v1.0
   Warm, Claude-inspired aesthetic
   ═══════════════════════════════════════════════════════ */

/* ── VARIABLES ── */
:root {
  /* Backgrounds */
  --bg-primary: #F5F0E8;
  --bg-secondary: #EDE7DB;
  --bg-card: #FDFBF7;
  --bg-card-hover: #FFFFFF;
  --bg-input: #FDFBF7;
  --bg-input-focus: #FFFFFF;
  --bg-overlay: rgba(26, 22, 18, 0.4);

  /* Text */
  --text-primary: #1A1612;
  --text-secondary: #6B6259;
  --text-tertiary: #9C9389;
  --text-inverse: #F5F0E8;

  /* Accent */
  --accent: #C4714A;
  --accent-hover: #B5623D;
  --accent-soft: #E8CFC2;
  --accent-light: #F3E4DA;

  /* Status */
  --success: #5A8F6B;
  --success-soft: #D4E8DA;
  --warning: #C49B4A;
  --warning-soft: #F0E4C8;
  --error: #C45A5A;
  --error-soft: #F0D4D4;
  --info: #5A7FC4;
  --info-soft: #D4DEF0;

  /* Borders & Shadows */
  --border: #DDD6CA;
  --border-light: #E8E2D8;
  --border-focus: #C4714A;
  --shadow-sm: 0 1px 2px rgba(26,22,18,0.04);
  --shadow-md: 0 4px 16px rgba(26,22,18,0.06);
  --shadow-lg: 0 8px 32px rgba(26,22,18,0.08);
  --shadow-hover: 0 12px 40px rgba(26,22,18,0.12);

  /* Radii */
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 100px;

  /* Typography */
  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'DM Mono', 'Fira Code', monospace;

  /* Spacing scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Layout */
  --max-width: 1120px;
  --nav-height: 64px;
}

/* ── RESET ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  line-height: 1.5;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }
ul, ol { list-style: none; }

/* ── TYPOGRAPHY ── */
.t-display-xl {
  font-family: var(--font-display);
  font-size: clamp(38px, 5.5vw, 64px);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.03em;
}
.t-display-lg {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.t-display-md {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 500;
  letter-spacing: -0.02em;
}
.t-heading {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.t-subheading {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
}
.t-body { font-size: 16px; line-height: 1.6; }
.t-body-sm { font-size: 14px; line-height: 1.55; }
.t-caption { font-size: 13px; line-height: 1.4; }
.t-label {
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
}
.t-accent { color: var(--accent); }
.t-secondary { color: var(--text-secondary); }
.t-tertiary { color: var(--text-tertiary); }

/* ── LAYOUT ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ── NAV ── */
.fk-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 240, 232, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
}
.fk-nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.fk-nav__logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.fk-nav__logo span { color: var(--accent); }
.fk-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}
.fk-nav__link {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}
.fk-nav__link:hover { color: var(--text-primary); }
.fk-nav__cta {
  background: var(--text-primary);
  color: var(--text-inverse);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: opacity 0.2s ease;
}
.fk-nav__cta:hover { opacity: 0.85; }
.fk-nav__mobile-btn {
  display: none;
  background: none;
  border: none;
  padding: 4px;
  color: var(--text-primary);
}

/* Mobile menu overlay */
.fk-mobile-menu {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--bg-overlay);
  z-index: 200;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.fk-mobile-menu.is-open {
  opacity: 1;
}
.fk-mobile-menu__panel {
  position: absolute;
  top: 0; right: 0;
  width: 280px;
  height: 100%;
  background: var(--bg-card);
  padding: var(--space-2xl) var(--space-lg);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.fk-mobile-menu.is-open .fk-mobile-menu__panel {
  transform: translateX(0);
}
.fk-mobile-menu__close {
  position: absolute;
  top: 16px; right: 16px;
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 4px;
}
.fk-mobile-menu__link {
  display: block;
  font-size: 18px;
  padding: var(--space-md) 0;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-light);
}

/* ── FOOTER ── */
.fk-footer {
  border-top: 1px solid var(--border-light);
}
.fk-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.fk-footer__copy {
  font-size: 13px;
  color: var(--text-tertiary);
}
.fk-footer__links {
  display: flex;
  gap: var(--space-lg);
}
.fk-footer__link {
  font-size: 13px;
  color: var(--text-tertiary);
  transition: color 0.2s ease;
}
.fk-footer__link:hover { color: var(--text-primary); }

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  border: none;
  font-size: 15px;
  font-weight: 500;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
}
.btn--primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn--secondary {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn--secondary:hover {
  background: var(--bg-card);
  border-color: var(--text-tertiary);
  color: var(--text-primary);
}
.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 8px 16px;
}
.btn--ghost:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}
.btn--dark {
  background: var(--text-primary);
  color: var(--text-inverse);
}
.btn--dark:hover { opacity: 0.85; }
.btn--sm { font-size: 13px; padding: 8px 16px; }
.btn--lg { font-size: 16px; padding: 16px 32px; }
.btn--full { width: 100%; }
.btn--icon {
  width: 40px; height: 40px;
  padding: 0;
  border-radius: var(--radius-sm);
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ── FORM ELEMENTS ── */
.form-group {
  margin-bottom: var(--space-md);
}
.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-primary);
}
.form-hint {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 4px;
}
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 10px 14px;
  font-size: 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  transition: all 0.2s ease;
  outline: none;
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  background: var(--bg-input-focus);
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-light);
}
.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-tertiary);
}
.form-textarea {
  resize: vertical;
  min-height: 100px;
}
.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%239C9389' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}
.form-divider {
  height: 1px;
  background: var(--border-light);
  margin: var(--space-lg) 0;
}

/* ── CARDS ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.card--hover:hover {
  background: var(--bg-card-hover);
  border-color: var(--border);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.card--flat {
  box-shadow: none;
  border: 1px solid var(--border-light);
}
.card--accent {
  border-left: 3px solid var(--accent);
}

/* ── BADGES ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}
.badge--accent { background: var(--accent-soft); color: var(--accent); }
.badge--success { background: var(--success-soft); color: var(--success); }
.badge--warning { background: var(--warning-soft); color: var(--warning); }
.badge--error { background: var(--error-soft); color: var(--error); }
.badge--info { background: var(--info-soft); color: var(--info); }
.badge--neutral { background: var(--bg-secondary); color: var(--text-secondary); }

/* ── TABLES ── */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
}
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.table th {
  text-align: left;
  padding: 12px 16px;
  font-weight: 500;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}
.table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
}
.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: var(--bg-secondary); }

/* ── TABS ── */
.tabs {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: var(--space-lg);
}
.tab {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 400;
  color: var(--text-tertiary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all 0.2s ease;
  cursor: pointer;
}
.tab:hover { color: var(--text-primary); }
.tab.is-active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 500;
}

/* ── ALERTS ── */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}
.alert--success { background: var(--success-soft); color: var(--success); }
.alert--warning { background: var(--warning-soft); color: var(--warning); }
.alert--error { background: var(--error-soft); color: var(--error); }
.alert--info { background: var(--info-soft); color: var(--info); }

/* ── TOOL PAGE LAYOUT ── */
.tool-page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg) var(--space-4xl);
}
.tool-page__header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}
.tool-page__header h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}
.tool-page__header p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto;
}
.tool-page__body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}
.tool-page__panel {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}
.tool-page__panel-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border-light);
}

/* Paywall overlay */
.paywall-overlay {
  position: relative;
}
.paywall-overlay__blur {
  filter: blur(6px);
  pointer-events: none;
  user-select: none;
}
.paywall-overlay__cta {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-2xl);
  box-shadow: var(--shadow-lg);
  z-index: 10;
}

/* ── UPLOAD ZONE ── */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  background: var(--bg-input);
}
.upload-zone:hover,
.upload-zone.is-dragover {
  border-color: var(--accent);
  background: var(--accent-light);
}
.upload-zone__icon {
  margin: 0 auto var(--space-md);
  color: var(--text-tertiary);
}
.upload-zone__text {
  font-size: 14px;
  color: var(--text-secondary);
}
.upload-zone__text strong {
  color: var(--accent);
}
.upload-zone__hint {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: var(--space-xs);
}

/* ── SECTION PATTERNS ── */
.section { padding: var(--space-4xl) 0; }
.section--alt {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}
.section__header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}
.section__header h2 {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}
.section__header p {
  font-size: 16px;
  color: var(--text-secondary);
}

/* ── FAQ ACCORDION ── */
.faq-item {
  border-bottom: 1px solid var(--border-light);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  background: none;
  border: none;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
}
.faq-question svg {
  flex-shrink: 0;
  transition: transform 0.2s ease;
  color: var(--text-tertiary);
}
.faq-item.is-open .faq-question svg {
  transform: rotate(45deg);
}
.faq-answer {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  padding-bottom: var(--space-md);
  display: none;
}
.faq-item.is-open .faq-answer { display: block; }

/* ── ANIMATIONS ── */
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes slideIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ── UTILITY CLASSES ── */
.text-center { text-align: center; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.hidden { display: none !important; }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .fk-nav__mobile-btn { display: block; }
  .fk-nav__links { display: none; }
  .fk-mobile-menu { display: block; }
  .tool-page__body { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .fk-footer__inner { flex-direction: column; gap: 20px; text-align: center; }
  .fk-footer__links { justify-content: center; }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .tool-page__body { grid-template-columns: 1fr; max-width: 640px; margin: 0 auto; }
}

/* ── LANGUAGE SWITCHER ── */
.fk-lang-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--bg-secondary);
  padding: 3px;
  border-radius: 100px;
  border: 1px solid var(--border-light);
  margin-left: var(--space-md);
}
.fk-lang-switcher__link {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 4px 10px;
  border-radius: 100px;
  transition: all 0.2s ease;
}
.fk-lang-switcher__link:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.5);
}
.fk-lang-switcher__link--active {
  color: var(--accent);
  background: var(--bg-card) !important;
  box-shadow: var(--shadow-sm);
}

/* Mobile menu language switcher */
.fk-mobile-menu__panel .fk-lang-switcher {
  margin-left: 0;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-md);
  padding: 4px;
  border: 1px solid var(--border-light);
  justify-content: center;
  width: fit-content;
  align-self: center;
}
.fk-mobile-menu__panel .fk-lang-switcher__link {
  font-size: 12px;
  padding: 6px 14px;
}