/* ========================================
   KRKN AI — Auto Repair Receptionist
   Design System & Styles
   ======================================== */

:root {
  --navy: #1B2A4A;
  --orange: #E8622A;
  --orange-hover: #D4561F;
  --steel: #4A5568;
  --cloud: #F7F8FA;
  --charcoal: #2D3748;
  --green: #38A169;
  --white: #FFFFFF;
  --border: #E2E8F0;
  --light-gray: #EDF2F7;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --radius: 8px;
  --radius-lg: 12px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--steel);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }
ul, ol { list-style: none; }

/* Typography */
h1, h2, h3, h4 {
  color: var(--navy);
  font-weight: 700;
  line-height: 1.2;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.25rem; }

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section-padding {
  padding: 4rem 0;
}

/* ========================================
   Navigation
   ======================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: background 0.3s, box-shadow 0.3s, padding 0.3s;
}

.nav.scrolled {
  background: var(--white);
  box-shadow: var(--shadow-sm);
  padding: 0.5rem 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 2px;
  transition: color 0.3s;
}

.nav.scrolled .nav-logo {
  color: var(--navy);
}

.online-dot {
  color: #3cff39;
  animation: dot-pulse 2s ease-in-out infinite;
}

@keyframes dot-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.2; }
}

.nav-links {
  display: none;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255,255,255,0.8);
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--white);
}

.nav.scrolled .nav-links a {
  color: var(--steel);
}

.nav.scrolled .nav-links a:hover {
  color: var(--navy);
}

.nav-cta {
  display: none;
}

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: transform 0.3s, opacity 0.3s, background 0.3s;
}

.nav.scrolled .hamburger span {
  background: var(--navy);
}

.hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu overlay */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--white);
  z-index: 999;
  padding: 5rem 2rem 2rem;
  flex-direction: column;
  gap: 1.5rem;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--navy);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

/* Mobile bottom sticky CTA */
.mobile-bottom-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 998;
  background: var(--white);
  padding: 0.75rem 1.25rem;
  box-shadow: 0 -2px 8px rgba(0,0,0,0.1);
}

.mobile-bottom-cta .btn-primary {
  width: 100%;
  text-align: center;
}

/* ========================================
   Buttons
   ======================================== */
.btn-primary {
  display: inline-block;
  background: var(--orange);
  color: var(--white);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius);
  border: none;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
  background: var(--orange-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--white);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius);
  border: 2px solid rgba(255,255,255,0.5);
  transition: background 0.2s, border-color 0.2s;
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--white);
}

.btn-secondary--dark {
  color: var(--navy);
  border-color: var(--navy);
}

.btn-secondary--dark:hover {
  background: var(--navy);
  color: var(--white);
}

/* ========================================
   Cards
   ======================================== */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: box-shadow 0.3s, transform 0.3s;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* ========================================
   Section 1 — Hero
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--navy) 0%, var(--charcoal) 100%);
  padding: 6rem 0 4rem;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  color: var(--white);
  font-size: 2.5rem;
  margin-bottom: 1.25rem;
}

.hero-sub {
  color: rgba(255,255,255,0.7);
  font-size: 1.125rem;
  max-width: 640px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  margin-bottom: 2rem;
}

.hero-trust {
  color: rgba(255,255,255,0.4);
  font-size: 0.875rem;
  font-weight: 500;
}

/* ========================================
   Section 2 — The Problem
   ======================================== */
.problem {
  background: var(--charcoal);
  color: var(--white);
}

.problem h2 {
  color: var(--white);
  text-align: center;
  margin-bottom: 1.5rem;
}

.problem-body {
  max-width: 720px;
  margin: 0 auto 2.5rem;
  text-align: center;
  color: rgba(255,255,255,0.75);
  font-size: 1.0625rem;
  line-height: 1.8;
}

.stat-callout {
  max-width: 640px;
  margin: 0 auto;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-left: 4px solid var(--orange);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  text-align: center;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.9);
}

.stat-callout strong {
  color: var(--orange);
}

/* ========================================
   Section 3 — How It Works
   ======================================== */
.how-it-works {
  background: var(--cloud);
}

.how-it-works h2 {
  text-align: center;
  margin-bottom: 3rem;
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.step-card {
  text-align: center;
  padding: 2.5rem 2rem;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--orange);
  color: var(--white);
  font-weight: 700;
  font-size: 1.125rem;
  margin-bottom: 1.25rem;
}

.step-card .icon-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(232,98,42,0.1);
  margin: 0 auto 1rem;
  color: var(--orange);
}

.step-card .icon-wrap i {
  width: 28px;
  height: 28px;
}

.step-card h3 {
  margin-bottom: 0.75rem;
}

.step-card p {
  color: var(--steel);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ========================================
   Section 4 — Features
   ======================================== */
.features h2 {
  text-align: center;
  margin-bottom: 3rem;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
  border-radius: var(--radius);
  transition: background 0.2s;
}

.feature-item:hover {
  background: var(--cloud);
}

.feature-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: rgba(232,98,42,0.1);
  color: var(--orange);
}

.feature-icon i {
  width: 22px;
  height: 22px;
}

.feature-item h3 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.feature-item p {
  font-size: 0.875rem;
  color: var(--steel);
}

/* ========================================
   Section 5 — Use Cases
   ======================================== */
.use-cases {
  background: var(--cloud);
}

.use-cases h2 {
  text-align: center;
  margin-bottom: 3rem;
}

.use-cases-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.use-case-card {
  padding: 2rem;
}

.use-case-card .badge {
  display: inline-block;
  background: rgba(232,98,42,0.1);
  color: var(--orange);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}

.use-case-card h3 {
  margin-bottom: 0.75rem;
}

.use-case-card p {
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ========================================
   Section 6 — ROI Calculator
   ======================================== */
.calculator h2 {
  text-align: center;
  margin-bottom: 0.75rem;
}

.calculator-subtitle {
  text-align: center;
  color: var(--steel);
  margin-bottom: 2.5rem;
}

.calc-wrapper {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.calc-inputs {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.calc-field label {
  display: block;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.5rem;
  font-size: 0.9375rem;
}

.calc-field .range-value {
  float: right;
  font-weight: 700;
  color: var(--orange);
}

.calc-field input[type="range"] {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: var(--light-gray);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.calc-field input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--orange);
  cursor: pointer;
  border: 3px solid var(--white);
  box-shadow: var(--shadow-sm);
}

.calc-field input[type="range"]::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--orange);
  cursor: pointer;
  border: 3px solid var(--white);
  box-shadow: var(--shadow-sm);
}

.calc-results {
  background: var(--navy);
  border-radius: var(--radius-lg);
  padding: 2rem;
  color: var(--white);
}

.calc-results h3 {
  color: var(--white);
  margin-bottom: 1.5rem;
  font-size: 1.125rem;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.result-row:last-of-type {
  border-bottom: none;
}

.result-label {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
}

.result-value {
  font-size: 1.25rem;
  font-weight: 700;
}

.result-value.negative {
  color: #FC8181;
}

.result-value.positive {
  color: #68D391;
}

.calc-cta {
  margin-top: 1.5rem;
  text-align: center;
}

.calc-cta .btn-primary {
  width: 100%;
}

/* ========================================
   Section 7 — Pricing
   ======================================== */
.pricing {
  background: var(--cloud);
}

.pricing h2 {
  text-align: center;
  margin-bottom: 0.5rem;
}

.pricing-subtitle {
  text-align: center;
  color: var(--steel);
  margin-bottom: 3rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.pricing-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  display: flex;
  flex-direction: column;
}

.pricing-card.popular {
  border-color: var(--orange);
  box-shadow: 0 4px 20px rgba(232,98,42,0.15);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--orange);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0.25rem 1rem;
  border-radius: 999px;
}

.pricing-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

.pricing-card .tier-desc {
  font-size: 0.875rem;
  color: var(--steel);
  margin-bottom: 1.25rem;
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 0.25rem;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--steel);
}

.pricing-features {
  margin: 1.5rem 0;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.4rem 0;
  font-size: 0.875rem;
  color: var(--steel);
}

.pricing-features li i {
  color: var(--green);
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-card .btn-primary {
  width: 100%;
  text-align: center;
  margin-top: auto;
}

.pricing-note {
  text-align: center;
  color: var(--steel);
  font-size: 0.875rem;
  margin-top: 2rem;
}

/* ========================================
   Section 8 — Testimonials
   ======================================== */
.testimonials h2 {
  text-align: center;
  margin-bottom: 3rem;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.testimonial-card {
  padding: 2rem;
}

.testimonial-stars {
  color: #F6AD55;
  margin-bottom: 1rem;
  font-size: 1.125rem;
  letter-spacing: 2px;
}

.testimonial-card blockquote {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--navy);
  font-style: italic;
  margin-bottom: 1.25rem;
}

.testimonial-author {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--navy);
}

.testimonial-role {
  font-size: 0.8125rem;
  color: var(--steel);
}

/* ========================================
   Section 9 — FAQ
   ======================================== */
.faq {
  background: var(--cloud);
}

.faq h2 {
  text-align: center;
  margin-bottom: 3rem;
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0;
  background: none;
  border: none;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  transition: color 0.2s;
}

.faq-question:hover {
  color: var(--orange);
}

.faq-question .faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  transition: transform 0.3s;
  color: var(--steel);
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
  color: var(--orange);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding-bottom: 1.25rem;
}

.faq-answer p {
  color: var(--steel);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ========================================
   Section 10 — Final CTA
   ======================================== */
.final-cta {
  background: linear-gradient(135deg, var(--navy) 0%, var(--charcoal) 100%);
  text-align: center;
  color: var(--white);
}

.final-cta h2 {
  color: var(--white);
  margin-bottom: 1rem;
}

.final-cta p {
  color: rgba(255,255,255,0.7);
  font-size: 1.0625rem;
  max-width: 560px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.final-cta .microcopy {
  color: rgba(255,255,255,0.4);
  font-size: 0.8125rem;
  margin-top: 1rem;
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
  background: var(--navy);
  color: rgba(255,255,255,0.5);
  padding: 3rem 0 2rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.footer-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 2px;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  font-size: 0.875rem;
  transition: color 0.2s;
}

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

.footer-copy {
  font-size: 0.8125rem;
}

/* ========================================
   Modals
   ======================================== */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
}

.modal-backdrop.open {
  display: flex;
}

.modal {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: modal-in 0.2s ease;
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--steel);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background 0.2s;
}

.modal-close:hover {
  background: var(--light-gray);
}

.modal h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.modal .modal-desc {
  font-size: 0.875rem;
  color: var(--steel);
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--navy);
  margin-bottom: 0.375rem;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  color: var(--navy);
  transition: border-color 0.2s, box-shadow 0.2s;
  background: var(--white);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(232,98,42,0.1);
}

.form-group .error-msg {
  display: none;
  font-size: 0.8125rem;
  color: #E53E3E;
  margin-top: 0.25rem;
}

.form-group.has-error input,
.form-group.has-error select {
  border-color: #E53E3E;
}

.form-group.has-error .error-msg {
  display: block;
}

.form-submit {
  width: 100%;
  margin-top: 0.5rem;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--green);
  color: var(--white);
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9375rem;
  box-shadow: var(--shadow-lg);
  z-index: 3000;
  animation: toast-in 0.3s ease, toast-out 0.3s ease 3s forwards;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(1rem); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toast-out {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* Fade-in animation */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   Responsive — Tablet (768px+)
   ======================================== */
@media (min-width: 768px) {
  h1 { font-size: 3rem; }
  h2 { font-size: 2.25rem; }

  .hero h1 { font-size: 3.25rem; }
  .hero-sub { font-size: 1.25rem; }

  .hero-buttons {
    flex-direction: row;
    justify-content: center;
  }

  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .use-cases-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .calc-wrapper {
    grid-template-columns: 1fr 1fr;
  }

  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* ========================================
   Responsive — Desktop (1200px+)
   ======================================== */
@media (min-width: 1200px) {
  h1 { font-size: 3.5rem; }

  .hero h1 { font-size: 3.75rem; }

  .nav-links {
    display: flex;
  }

  .nav-cta {
    display: inline-block;
  }

  .hamburger {
    display: none;
  }

  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .pricing-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ========================================
   Mobile bottom CTA visibility
   ======================================== */
@media (max-width: 1199px) {
  .mobile-bottom-cta.visible {
    display: block;
  }
}

/* ========================================
   Accessibility
   ======================================== */
:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

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

  html { scroll-behavior: auto; }
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: middle;
  margin-right: 0.5rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}