/* tools.css — shared base styles for all tool pages */

/* ── Typography
   System font stack: SF Pro on Apple, Segoe UI on Windows, Roboto on Android.
   Modern, readable, zero download. ─────────────────────────────────────────── */
:root {
  --font-main: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Fira Code", Consolas, "Courier New", monospace;

  --color-primary:    #4a90e2;
  --color-primary-dk: #357abd;
  --color-bg:         #f9f9f9;
  --color-surface:    #ffffff;
  --color-border:     #ddd;
  --color-text:       #333;
  --color-text-muted: #666;
  --color-footer-bg:  #222;
  --color-footer-txt: #aaa;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
}

/* ── Reset / base ──────────────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
}

body.tool-body {
  margin: 0;
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Header ────────────────────────────────────────────────────────────────── */
.tool-header {
  background-color: var(--color-primary);
  color: #fff;
  padding: 2rem 1rem;
  text-align: center;
  position: relative;
}

.tool-title {
  margin: 0;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
}

.tool-subtitle {
  margin: 0.5rem 0 0;
  font-size: 1rem;
  opacity: 0.9;
}

/* ── Back button (top-left of header) ─────────────────────────────────────── */
.back-btn {
  position: absolute;
  top: 50%;
  left: 1rem;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.2s;
  white-space: nowrap;
}

.back-btn:hover {
  background: rgba(255, 255, 255, 0.32);
}

/* On small screens collapse to just the arrow */
@media (max-width: 480px) {
  .back-btn .back-label {
    display: none;
  }
  .tool-title {
    font-size: 1.5rem;
  }
  .tool-header {
    padding: 1.5rem 3.5rem; /* leave room for back btn */
  }
}

/* ── Main content area ────────────────────────────────────────────────────── */
.tool-main {
  flex: 1;
  padding: 2rem 1rem;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
}

/* ── Common form elements ─────────────────────────────────────────────────── */
.tool-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  font-size: 0.95rem;
}

.tool-input,
.tool-textarea,
.tool-select {
  width: 100%;
  padding: 0.75rem;
  font-family: var(--font-main);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.2s;
}

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

.tool-textarea {
  font-family: var(--font-mono);
  min-height: 140px;
  resize: vertical;
}

.tool-button {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  background-color: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 600;
  transition: background-color 0.2s;
}

.tool-button:hover {
  background-color: var(--color-primary-dk);
}

/* ── Footer ────────────────────────────────────────────────────────────────── */
.tool-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-txt);
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
  font-family: var(--font-main);
  /* Never fixed — sits at bottom of flex column */
}

.tool-footer-text {
  margin: 0;
}

.tool-footer a {
  color: #7db8f0;
  text-decoration: none;
}

.tool-footer a:hover {
  color: #a8d0f7;
  text-decoration: underline;
}