/* ============================================================
   Gobvantage Technologies — Industrial Precision Design System
   design.css — replaces components.css
   
   All class names from saas-starter-template HTML are preserved.
   Reference: DESIGN.md for full specification and rationale.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');


/* ============================================================
   1. TYPOGRAPHY
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--on-surface);
  line-height: 1.2;
  letter-spacing: var(--tracking-tighter);
  font-weight: 700;
}

p {
  font-size: var(--text-body-md);
  line-height: var(--leading-body);
  color: var(--on-surface-variant);
}

small {
  font-size: var(--text-body-sm);
  color: var(--on-surface-variant);
}

.label-md {
  font-size: var(--text-label-md);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--on-surface-variant);
}

.label-sm {
  font-size: var(--text-label-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--primary);
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}


/* ============================================================
   2. NAVIGATION
   ============================================================ */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  display: flex;
  align-items: center;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  height: var(--nav-height);
}

.nav-brand {
  font-size: var(--text-title-lg);
  font-weight: 700;
  color: var(--on-surface);
  letter-spacing: var(--tracking-tighter);
}

.nav-brand:hover {
  color: var(--on-surface);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  font-size: var(--text-body-md);
  font-weight: 500;
  color: var(--on-surface-variant);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--on-surface);
  background-color: var(--surface-container-low);
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }
}


/* ============================================================
   3. BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--text-body-md);
  font-weight: 600;
  line-height: 1;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-6);
  transition: background-color var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-dim);
  color: var(--on-primary);
}

.btn-secondary {
  background-color: var(--primary-container);
  color: var(--on-primary-container);
}

.btn-secondary:hover:not(:disabled) {
  background-color: #b8d8f0;
  color: var(--on-primary-container);
}

.btn-ghost {
  background-color: transparent;
  color: var(--on-surface-variant);
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--surface-container-low);
  color: var(--on-surface);
}

.btn-danger {
  background-color: var(--error);
  color: var(--on-error);
}

.btn-danger:hover:not(:disabled) {
  background-color: #8a3330;
  color: var(--on-error);
}

.btn-sm {
  font-size: var(--text-label-md);
  padding: var(--space-2) var(--space-4);
}

.btn-lg {
  font-size: var(--text-title-md);
  padding: var(--space-4) var(--space-8);
}

.btn-block,
.btn-full {
  width: 100%;
}


/* ============================================================
   4. FORMS
   ============================================================ */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-label-md);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--on-surface-variant);
  margin-bottom: var(--space-1);
}

.form-input,
.form-select,
.form-textarea {
  font-family: var(--font-sans);
  font-size: var(--text-body-md);
  color: var(--on-surface);
  background-color: var(--surface-container-highest);
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  padding: var(--space-3) var(--space-4);
  width: 100%;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  outline: none;
  line-height: var(--leading-body);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  background-color: var(--surface-container-lowest);
  border-bottom-color: var(--primary);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--outline-variant);
}

.form-input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-textarea {
  resize: vertical;
  min-height: 7rem;
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-bottom-color: var(--error);
  background-color: rgba(254, 137, 131, 0.10);
}

.form-error {
  font-size: var(--text-label-md);
  color: var(--error);
  margin-top: var(--space-1);
}

.form-hint {
  font-size: var(--text-label-md);
  color: var(--on-surface-variant);
}


/* ============================================================
   5. CARDS
   ============================================================ */

.card {
  background-color: var(--surface-container-lowest);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: box-shadow var(--transition-medium);
}

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

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

.card-flat {
  background-color: var(--surface-container-low);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}


/* ============================================================
   6. BADGES
   ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-label-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  line-height: 1.4;
  background-color: var(--surface-container-highest);
  color: var(--on-surface-variant);
}

.badge-primary {
  background-color: var(--primary-container);
  color: var(--on-primary-container);
}

.badge-success {
  background-color: var(--success-container);
  color: var(--success);
}

.badge-error {
  background-color: rgba(254, 137, 131, 0.20);
  color: var(--error);
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-3);
  border-radius: 9999px;
  font-size: var(--text-label-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
}


/* ============================================================
   7. ALERTS
   ============================================================ */

.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-body-md);
  margin-bottom: var(--space-4);
}

.alert-info {
  background-color: var(--primary-container);
  color: var(--on-primary-container);
}

.alert-success {
  background-color: var(--success-container);
  color: var(--success);
}

.alert-error {
  background-color: rgba(254, 137, 131, 0.20);
  color: var(--error);
}

.alert-warning {
  background-color: var(--warning-container);
  color: var(--warning);
}


/* ============================================================
   8. MODAL
   ============================================================ */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(42, 52, 57, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: var(--space-6);
}

.modal {
  background: var(--surface-container-lowest);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-lg);
}

.modal-title {
  font-size: var(--text-headline-sm);
  font-weight: 700;
  color: var(--on-surface);
  letter-spacing: var(--tracking-tighter);
  margin-bottom: var(--space-6);
}

.modal-actions {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.modal-actions .btn {
  flex: 1;
}


/* ============================================================
   9. HERO
   ============================================================ */

.hero {
  padding: var(--space-20) 0 var(--space-16);
  background-color: var(--background);
  text-align: center;
}

.hero-eyebrow {
  display: inline-block;
  font-size: var(--text-label-md);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--primary);
  margin-bottom: var(--space-4);
}

.hero-title {
  font-size: var(--text-display-lg);
  font-weight: 700;
  letter-spacing: var(--tracking-tighter);
  color: var(--on-surface);
  margin-bottom: var(--space-6);
  line-height: 1.1;
}

.hero-subtitle {
  font-size: var(--text-title-lg);
  line-height: var(--leading-body);
  color: var(--on-surface-variant);
  max-width: 52ch;
  margin: 0 auto var(--space-8);
}

@media (max-width: 640px) {
  .hero {
    padding: var(--space-12) 0 var(--space-10);
  }

  .hero-title {
    font-size: var(--text-headline-lg);
  }

  .hero-subtitle {
    font-size: var(--text-title-md);
  }
}


/* ============================================================
   10. SECTIONS
   ============================================================ */

.section {
  padding: var(--space-16) 0;
}

.section-sm {
  padding: var(--space-10) 0;
}

.section-title {
  font-size: var(--text-headline-lg);
  font-weight: 700;
  letter-spacing: var(--tracking-tighter);
  color: var(--on-surface);
  text-align: center;
  margin-bottom: var(--space-3);
}

.section-subtitle {
  font-size: var(--text-title-md);
  color: var(--on-surface-variant);
  text-align: center;
  max-width: 52ch;
  margin: 0 auto var(--space-10);
  line-height: var(--leading-body);
}


/* ============================================================
   11. FEATURES GRID
   ============================================================ */

.features {
  padding: var(--space-16) 0;
  background-color: var(--surface-container-low);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.feature-card {
  background-color: var(--surface-container-lowest);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: box-shadow var(--transition-medium);
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background-color: var(--primary-container);
  color: var(--primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-4);
}

.feature-title {
  font-size: var(--text-title-lg);
  font-weight: 600;
  color: var(--on-surface);
  letter-spacing: var(--tracking-tighter);
  margin-bottom: var(--space-2);
}

.feature-desc {
  font-size: var(--text-body-md);
  color: var(--on-surface-variant);
  line-height: var(--leading-body);
}

@media (max-width: 640px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}


/* ============================================================
   12. PRICING
   ============================================================ */

.pricing-card {
  background-color: var(--surface-container-lowest);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  text-align: center;
  transition: box-shadow var(--transition-medium);
  position: relative;
}

.pricing-card:hover {
  box-shadow: var(--shadow-md);
}

.pricing-card.popular,
.pricing-card.featured {
  background: var(--gradient-primary);
}

.pricing-card.popular h3,
.pricing-card.popular .pricing-price,
.pricing-card.popular p,
.pricing-card.popular .pricing-features li,
.pricing-card.featured h3,
.pricing-card.featured .pricing-price,
.pricing-card.featured p,
.pricing-card.featured .pricing-features li {
  color: var(--on-primary);
}

.pricing-card.popular::before {
  content: 'Popular';
  position: absolute;
  top: -0.875rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-container);
  color: var(--on-primary-container);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-sm);
  font-size: var(--text-label-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  white-space: nowrap;
}

.pricing-price {
  font-size: var(--text-display-lg);
  font-weight: 700;
  color: var(--on-surface);
  letter-spacing: var(--tracking-tighter);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.pricing-price span {
  font-size: var(--text-title-md);
  font-weight: 400;
  opacity: 0.7;
}

.pricing-features {
  list-style: none;
  margin: var(--space-6) 0;
  text-align: left;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-body-md);
  color: var(--on-surface-variant);
  padding: var(--space-2) 0;
}

.pricing-features li::before {
  content: '✓';
  color: var(--primary);
  font-weight: 700;
  flex-shrink: 0;
}

.pricing-card.popular .pricing-features li::before,
.pricing-card.featured .pricing-features li::before {
  color: var(--on-primary);
}


/* ============================================================
   13. SIDEBAR & APP SHELL
   ============================================================ */

.sidebar {
  width: 240px;
  background: var(--surface-container-highest);
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  padding: var(--space-4) 0;
  overflow-y: auto;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  color: var(--on-surface-variant);
  font-size: var(--text-body-md);
  font-weight: 500;
  margin: 0 var(--space-2);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.sidebar-link:hover {
  background-color: var(--surface-container-low);
  color: var(--on-surface);
}

.sidebar-link.active {
  background: var(--gradient-primary);
  color: var(--on-primary);
}

.main-content {
  margin-left: 240px;
  min-height: 100vh;
  background: var(--background);
}

.page-header {
  padding: var(--space-6) var(--space-8);
  background-color: var(--surface-container-lowest);
}

.page-title {
  font-size: var(--text-headline-md);
  font-weight: 700;
  color: var(--on-surface);
  letter-spacing: var(--tracking-tighter);
}

@media (max-width: 768px) {
  .sidebar {
    display: none;
  }

  .main-content {
    margin-left: 0;
  }
}


/* ============================================================
   14. DATA BLUEPRINT
   ============================================================ */

.data-blueprint {
  background-color: var(--surface-container-low);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}

.data-blueprint .data-label {
  font-size: var(--text-label-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--primary);
  margin-bottom: var(--space-2);
}

.data-blueprint .data-value {
  font-size: var(--text-headline-md);
  font-weight: 700;
  color: var(--on-surface);
  letter-spacing: var(--tracking-tighter);
}


/* ============================================================
   15. FOOTER
   ============================================================ */

.footer {
  background-color: var(--surface-container-low);
  padding: var(--space-8) 0;
  margin-top: var(--space-20);
  text-align: center;
  color: var(--on-surface-variant);
  font-size: var(--text-body-sm);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-8);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.footer-brand {
  font-size: var(--text-title-md);
  font-weight: 700;
  color: var(--on-surface);
  letter-spacing: var(--tracking-tighter);
  margin-bottom: var(--space-3);
}

.footer-heading {
  font-size: var(--text-label-md);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--on-surface-variant);
  margin-bottom: var(--space-4);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  font-size: var(--text-body-md);
  color: var(--on-surface-variant);
}

.footer-links a:hover {
  color: var(--on-surface);
}

.footer-bottom {
  max-width: var(--container-max);
  margin: var(--space-8) auto 0;
  padding: var(--space-6) var(--container-pad) 0;
  border-top: 1px solid rgba(169, 180, 185, 0.15);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

@media (max-width: 768px) {
  .footer-inner {
    grid-template-columns: 1fr;
  }
}


/* ============================================================
   ClockSplit — product-specific extensions
   ============================================================ */

.session-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-2);
  background: var(--surface);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.session-row + .session-row {
  margin-top: var(--space-2);
}

.session-row:hover {
  background: var(--surface-container-lowest);
}

.session-row input[type="checkbox"] {
  width: 1.125rem;
  height: 1.125rem;
  accent-color: var(--primary);
  cursor: pointer;
}

.text-success { color: var(--success); }

.upgrade-placeholder {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.upgrade-placeholder .form-input { margin-bottom: 0; }

@media (max-width: 768px) {
  .features-grid[style*="grid-template-columns: 1fr 1fr"],
  .features-grid[style*="grid-template-columns: repeat(3, 1fr)"] {
    grid-template-columns: 1fr !important;
  }
}

/* Section scroll offset so sticky nav doesn't hide the section heading */
#tracker-view, #reports-view, #settings-view {
  scroll-margin-top: calc(var(--nav-height) + var(--space-4));
}

/* Toast notifications — pinned top-right, slide in, auto-dismiss */
.toast-container {
  position: fixed;
  top: calc(var(--nav-height) + var(--space-3));
  right: var(--space-4);
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
  max-width: calc(100vw - var(--space-8));
}

.toast {
  background: var(--success-container);
  color: var(--success);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: var(--text-body-md);
  box-shadow: var(--shadow-md);
  pointer-events: auto;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 180ms ease, transform 180ms ease;
  max-width: 360px;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast.toast-error {
  background: var(--error-container);
  color: var(--error);
}