/* === SPC Lab Inspired Design System === */
:root {
  /* Colors - Sophisticated Monotone with Deep Navy Accent */
  --color-primary: #001D42;
  /* Deep Navy (SPC-like) */
  --color-primary-light: #003375;
  --color-accent: #0056B3;
  --color-background: #FFFFFF;
  --color-surface: #F8F9FA;
  --color-border: #E5E7EB;

  /* Text Colors */
  --color-text-main: #111827;
  /* Near Black */
  --color-text-sub: #4B5563;
  /* Dark Gray */
  --color-text-muted: #9CA3AF;
  /* Gray */

  /* Semantic Colors */
  --color-success: #10B981;
  --color-danger: #EF4444;
  --color-warning: #F59E0B;
  /* Amber/Yellow for Pending states */

  /* Typography - Clean & Bold */
  --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 16px;
  --font-size-h1: 2.5rem;
  --font-size-h2: 1.75rem;
  --font-size-h3: 1.25rem;
  --font-size-body: 1rem;
  --font-size-sm: 0.875rem;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;
  --line-height-tight: 1.2;
  --line-height-base: 1.8;
  /* Generous line height for elegance */

  /* Spacing - 8px Grid System */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-6: 3rem;
  --space-8: 4rem;

  /* UI Elements */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-subtle: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  /* Compatibility Aliases (Old Design System) */
  --color-primary-dark: var(--color-primary-light);
  --color-secondary: var(--color-text-sub);
  --color-info: var(--color-accent);
  --color-light: var(--color-surface);
  --color-dark: var(--color-text-main);
  --color-text: var(--color-text-main);
  --font-size-lg: var(--font-size-h3);
  --border-radius: var(--radius-md);
  --border-radius-lg: var(--radius-lg);
  --shadow: var(--shadow-md);
  --spacing-1: var(--space-1);
  --spacing-2: var(--space-2);
  --spacing-3: var(--space-3);
  --spacing-4: var(--space-4);
  --spacing-5: var(--space-6);
}

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

body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text-main);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography Helpers */
h1,
h2,
h3 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

p {
  margin-bottom: var(--space-2);
  color: var(--color-text-sub);
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-base);
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  text-decoration: underline;
}

/* Layout */
header {
  height: 80px;
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

main {
  min-height: calc(100vh - 250px);
  padding: var(--space-8) var(--space-6);
  max-width: 1200px;
  margin: 0 auto;
}

footer {
  padding: var(--space-6);
  border-top: 1px solid var(--color-border);
  text-align: left;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Global Components */
.container {
  max-width: 1200px;
  margin: 0 auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 2rem;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-body);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-base);
  border: 1px solid transparent;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-light);
  transform: translateY(-1px);
}

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

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

.btn-icon {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-sub);
  transition: var(--transition-base);
}

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

.btn-icon:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* Forms */
.form-group {
  margin-bottom: var(--space-4);
}

label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-1);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-sub);
}

input,
textarea {
  width: 100%;
  padding: 1rem 0;
  border: none;
  border-bottom: 2px solid var(--color-border);
  background: transparent;
  font-family: inherit;
  font-size: var(--font-size-body);
  transition: var(--transition-base);
}

input:focus,
textarea:focus {
  outline: none;
  border-bottom-color: var(--color-primary);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

/* Auth Pages & Centered Layouts */
.centered-layout {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--color-background);
  padding: var(--space-8) 0;
}

.auth-card h1 {
  text-align: center;
  font-size: var(--font-size-h2);
  margin-bottom: var(--space-6);
  letter-spacing: 0.1em;
}