:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --secondary: #14b8a6;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --radius: 0.5rem;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  padding: 2rem 0;
}

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

button {
  cursor: pointer;
  font-family: inherit;
}

input, textarea {
  font-family: inherit;
}

h1, h2, h3, h4 {
  color: var(--text-main);
  font-weight: 700;
  margin-bottom: 1rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-weight: 500;
  transition: all 0.2s;
  border: 1px solid transparent;
  text-decoration: none;
  font-size: 1rem;
}

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

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

.btn-outline {
  border-color: var(--border);
  background: transparent;
}

.btn-outline:hover {
  background: var(--bg-main);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-muted);
}

.form-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.1);
}

/* Navbar */
.nav {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

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

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
}

.logo span {
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s;
}

.nav-links a.active {
  color: var(--primary);
  font-weight: 700;
}

/* Hero Section */
.hero {
  padding: 4rem 0;
  text-align: center;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(20, 184, 166, 0.05) 100%);
  border-radius: var(--radius);
  margin-bottom: 4rem;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  text-align: center;
}

.feature-icon {
  width: 3rem;
  height: 3rem;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-weight: 700;
  font-size: 1.25rem;
}

/* Auth Pages */
.auth-wrapper {
  max-width: 400px;
  margin: 4rem auto;
}

.auth-title {
  text-align: center;
  margin-bottom: 2rem;
}

.socials {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 2rem;
}

.social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  font-weight: 600;
  transition: all 0.2s;
}

.social-btn svg {
  width: 1.25rem;
  height: 1.25rem;
}

.divider {
  display: flex;
  align-items: center;
  margin: 2rem 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.divider::before, .divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border);
}

.divider:not(:empty)::before { margin-right: 1rem; }
.divider:not(:empty)::after { margin-left: 1rem; }

.auth-footer {
  margin-top: 1.5rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.auth-footer a {
  color: var(--primary);
  font-weight: 600;
}

/* Dashboard / Grid Layouts */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
}

.grid-item {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-main);
  color: var(--text-muted);
}

.badge-success {
  background: rgba(20, 184, 166, 0.1);
  color: var(--secondary);
}

.item-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

.result-area {
  background: #f1f5f9;
  border-radius: var(--radius);
  padding: 1.5rem;
  font-family: inherit;
  font-size: 0.875rem;
  white-space: pre-wrap;
  border: 1px solid var(--border);
  margin-top: 1.5rem;
  max-height: 500px;
  overflow-y: auto;
}

footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 4rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}