/* CSS Variables */
:root {
  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Menlo', monospace;
  
  --color-bg: #0a0a0b;
  --color-surface: #141416;
  --color-surface-hover: #1a1a1d;
  --color-border: #2a2a2d;
  --color-border-focus: #4a4a4d;
  
  --color-text: #fafafa;
  --color-text-muted: #888;
  --color-text-dim: #666;
  
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

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

/* Base */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Layout */
#app {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.mode {
  width: 100%;
  max-width: 480px;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Header */
header {
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.tagline {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Icons */
.icon-success,
.icon-revealed,
.icon-error {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.icon-success { color: var(--color-success); }
.icon-revealed { color: var(--color-primary); }
.icon-error { color: var(--color-error); }

/* Form Fields */
.field {
  margin-bottom: 1.25rem;
}

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

.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.15rem 0.4rem;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-left: 0.5rem;
  vertical-align: middle;
}

textarea,
input[type="text"],
input[type="password"],
select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.15s, box-shadow 0.15s;
}

textarea {
  resize: vertical;
  min-height: 100px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

textarea:focus,
input:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

textarea::placeholder,
input::placeholder {
  color: var(--color-text-dim);
}

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.5rem;
}

/* Character Count */
.char-count {
  text-align: right;
  font-size: 0.75rem;
  color: var(--color-text-dim);
  margin-top: 0.25rem;
  font-family: var(--font-mono);
}

/* Input Wrapper (for password toggle) */
.input-wrapper {
  position: relative;
}

.input-wrapper input {
  padding-right: 2.75rem;
}

.icon-btn {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  padding: 0.5rem;
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s;
}

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

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-text {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

.btn-primary {
  width: 100%;
  padding: 0.875rem 1.5rem;
  background: var(--color-primary);
  color: white;
}

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

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-secondary {
  padding: 0.625rem 1rem;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-focus);
}

.btn-text {
  padding: 0.75rem 1rem;
  background: none;
  color: var(--color-primary);
  border: none;
}

.btn-text:hover {
  text-decoration: underline;
}

/* Share Link */
.share-link-container {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.share-link-container input {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--color-bg);
}

/* Info Box */
.info-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
}

.info-box p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.info-box p:last-child {
  margin-bottom: 0;
}

.info-box strong {
  color: var(--color-text);
  font-weight: 500;
}

/* Secret Container */
.secret-container {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.secret-container pre {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  white-space: pre-wrap;
  word-break: break-word;
  margin-bottom: 1rem;
  max-height: 300px;
  overflow-y: auto;
}

.secret-container .btn-secondary {
  width: 100%;
}

/* Warning */
.warning {
  font-size: 0.85rem;
  color: var(--color-warning);
  text-align: center;
  margin-top: 1rem;
  padding: 0.75rem;
  background: rgba(245, 158, 11, 0.1);
  border-radius: var(--radius-md);
}

/* Error Message */
.error-message {
  font-size: 0.9rem;
  color: var(--color-error);
  text-align: center;
  margin-top: 1rem;
  padding: 0.75rem;
  background: rgba(239, 68, 68, 0.1);
  border-radius: var(--radius-md);
}

/* Footer */
footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--color-text-dim);
  font-size: 0.85rem;
}

footer a {
  color: var(--color-text-muted);
  text-decoration: none;
}

footer a:hover {
  color: var(--color-text);
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 480px) {
  #app {
    padding: 1.5rem 1rem;
    align-items: flex-start;
    padding-top: 3rem;
  }
  
  header h1 {
    font-size: 1.5rem;
  }
  
  .share-link-container {
    flex-direction: column;
  }
  
  .share-link-container .btn-secondary {
    width: 100%;
  }
}