/* ================================
   THEME VARIABLES
   ================================ */

:root {
  /* Brand Colors */
  --color-primary: #0066cc;
  --color-primary-dark: #004c99;
  --color-accent: #00bfa6;
  --color-success: #28a745;
  --color-warning: #ff9800;
  --color-danger: #e53935;
  --color-info: #17a2b8;

  /* Neutral Palette */
  --color-bg: #f9fafb;
  --color-surface: #ffffff;
  --color-border: #e5e7eb;
  --color-text: #1f2937;
  --color-text-light: #6b7280;
  --color-placeholder: #9ca3af;

  /* Typography */
  --font-family: "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-size-base: 16px;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 600;

  /* Layout + Effects */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 3px 6px rgba(0,0,0,0.12);
  --shadow-lg: 0 6px 12px rgba(0,0,0,0.18);
  --transition-fast: 0.2s ease;
  --transition-slow: 0.4s ease;

  /* Button Heights */
  --btn-height-sm: 34px;
  --btn-height-md: 42px;
  --btn-height-lg: 50px;
}

/* ================================
   GLOBAL RESETS + BASICS
   ================================ */

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

html, body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  background-color: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

/* ================================
   BUTTON STYLES
   ================================ */

button,
.btn {
  display: inline-block;
  font-family: inherit;
  font-weight: var(--font-weight-medium);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  height: var(--btn-height-md);
  padding: 0 20px;
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

/* Primary */
.btn-primary {
  background-color: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background-color: var(--color-primary-dark);
}

/* Success */
.btn-success {
  background-color: var(--color-success);
  color: #fff;
}
.btn-success:hover {
  opacity: 0.9;
}

/* Warning */
.btn-warning {
  background-color: var(--color-warning);
  color: #fff;
}
.btn-warning:hover {
  opacity: 0.9;
}

/* Danger */
.btn-danger {
  background-color: var(--color-danger);
  color: #fff;
}
.btn-danger:hover {
  opacity: 0.9;
}

/* Info */
.btn-info {
  background-color: var(--color-info);
  color: #fff;
}
.btn-info:hover {
  opacity: 0.9;
}

/* Outline variants */
.btn-outline {
  background: transparent;
  border: 1px solid currentColor;
}
.btn-outline:hover {
  background-color: rgba(0,0,0,0.04);
}

/* Disabled state */
button:disabled,
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ================================
   INPUTS
   ================================ */

input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  width: 100%;
  color: var(--color-text);
  background-color: var(--color-surface);
  transition: border-color var(--transition-fast);
}
input:focus, select:focus, textarea:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.15);
}

/* Placeholder */
::placeholder {
  color: var(--color-placeholder);
}

/* ================================
   UTILITY CLASSES
   ================================ */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-light); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }
.p-2 { padding: 1rem; }
.shadow { box-shadow: var(--shadow-md); }
.rounded { border-radius: var(--radius-md); }

/* ================================
   LINKS
   ================================ */

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


/* ================================
   MOBILE FIRST BASELINE
   ================================ */

/* smaller base font for compact screens */
@media (max-width: 480px) {
  :root {
    --font-size-base: 15px;
    --btn-height-md: 40px;
  }
}

/* give touch elements slightly larger hit area */
button, .btn, input, select {
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}