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

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-regular);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-hover);
}

ul, ol {
  list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--color-text-primary);
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.75rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.25rem;
}

p {
  color: var(--color-text-secondary);
}

/* Button Base */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-family);
  font-size: 0.9375rem;
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.btn:active {
  transform: translateY(1px);
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
}

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

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

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

.btn-secondary {
  background-color: transparent;
  color: var(--color-accent-primary);
  border: 1px solid var(--color-border-medium);
}

.btn-secondary:hover {
  background-color: var(--color-accent-light);
  border-color: var(--color-accent-primary);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: 1.0625rem;
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: 0.8125rem;
}

/* Input Base */
.input {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-family);
  font-size: 0.9375rem;
  color: var(--color-text-primary);
  background-color: var(--color-background);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

.input::placeholder {
  color: var(--color-text-tertiary);
}

textarea.input {
  resize: vertical;
  min-height: 120px;
}

/* Label */
.label {
  display: block;
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

/* Card */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

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

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  border-radius: 100px;
  line-height: 1.4;
}

.badge-success {
  background-color: #e8f5e9;
  color: #2e7d32;
}

.badge-warning {
  background-color: #fff3e0;
  color: #e65100;
}

.badge-error {
  background-color: #fce4ec;
  color: #c62828;
}

.badge-info {
  background-color: var(--color-accent-light);
  color: var(--color-accent-primary);
}

[data-theme="dark"] .badge-success {
  background-color: #1b3a1f;
  color: #81c784;
}

[data-theme="dark"] .badge-warning {
  background-color: #3e2a10;
  color: #ffb74d;
}

[data-theme="dark"] .badge-error {
  background-color: #3e1418;
  color: #ef9a9a;
}

/* Container */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Utility: visually hidden */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Dark mode toggle */
.theme-toggle {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: 1000;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-medium);
  border-radius: 50%;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
  font-size: 1.125rem;
  line-height: 1;
  padding: 0;
}

.theme-toggle:hover {
  background-color: var(--color-surface-hover);
  border-color: var(--color-border-strong);
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border-medium);
  border-top-color: var(--color-accent-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* Section spacing */
.section {
  padding: var(--space-12) 0;
}

.section + .section {
  border-top: 1px solid var(--color-border-light);
}

/* Responsive breakpoints via container queries fallback */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .container {
    padding: 0 var(--space-4);
  }

  .section {
    padding: var(--space-8) 0;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.25rem;
  }
}