/* ==========================================================================
   style.css - Clean, Professional Stylesheet for College Semester Project
   English-to-Hindi Translator
   Built using pure CSS3 without frameworks or bloated libraries.
   ========================================================================== */

/* --- CSS Variables / Color Palette --- */
:root {
  --bg-color: #f1f5f9;
  --card-bg: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --border-focus: #3b82f6;
  
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-active: #1e40af;
  --primary-text: #ffffff;
  
  --btn-outline-border: #cbd5e1;
  --btn-outline-hover-bg: #f8fafc;
  --btn-outline-text: #334155;
  
  --error-bg: #fef2f2;
  --error-border: #fecaca;
  --error-text: #b91c1c;

  --success-bg: #f0fdf4;
  --success-border: #bbf7d0;
  --success-text: #15803d;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-card: 0 4px 12px rgba(15, 23, 42, 0.05), 0 1px 3px rgba(15, 23, 42, 0.08);
}

/* --- Box Sizing & Reset --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem;
}

/* --- Page Layout --- */
.page-container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* --- Minimal Header --- */
.header {
  text-align: center;
  padding: 0.5rem 0 0.5rem;
}

.title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* --- Status / Error Banner --- */
.status-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--error-bg);
  border: 1px solid var(--error-border);
  color: var(--error-text);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.925rem;
  animation: fadeIn 0.2s ease-in-out;
}

.status-banner.success {
  background-color: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success-text);
}

.status-banner.hidden {
  display: none;
}

.close-banner-btn {
  background: none;
  border: none;
  font-size: 1.25rem;
  color: inherit;
  cursor: pointer;
  line-height: 1;
  padding: 0 0.25rem;
}

/* --- Translator Card --- */
.translator-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Desktop 2-column layout */
@media (min-width: 768px) {
  .translator-card {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: stretch;
  }
}

/* --- Panels (Input & Output) --- */
.panel {
  display: flex;
  flex-direction: column;
  padding: 1.25rem;
  flex: 1;
}

.input-panel {
  border-bottom: 1px solid var(--border-color);
}

@media (min-width: 768px) {
  .input-panel {
    border-bottom: none;
    border-right: 1px solid var(--border-color);
  }
}

.output-panel {
  background-color: #fafbfc;
}

/* Panel Header */
.panel-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.panel-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
}

.language-select {
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-main);
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s ease;
}

.language-select:focus {
  border-color: var(--border-focus);
}

/* Textarea Container */
.textarea-container {
  flex: 1;
  display: flex;
  margin-bottom: 0.75rem;
}

.translation-textarea {
  width: 100%;
  font-family: inherit;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text-main);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  resize: vertical;
  min-height: 160px;
  outline: none;
}

.translation-textarea:focus {
  background: #ffffff;
  border-color: var(--border-focus);
}

.output-area {
  background-color: transparent;
  cursor: default;
}

.output-area:focus {
  background: transparent;
  border-color: transparent;
}

/* Panel Footer */
.panel-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.5rem;
  border-top: 1px solid #f1f5f9;
}

.char-count {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.output-status {
  font-size: 0.85rem;
  color: var(--success-text);
  font-weight: 500;
}

/* --- Central Controls / Action Bar --- */
.controls-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background-color: #f8fafc;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

@media (min-width: 768px) {
  .controls-divider {
    flex-direction: column;
    justify-content: center;
    border-top: none;
    border-bottom: none;
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem 0.75rem;
    background-color: #f8fafc;
  }
}

/* --- Quick Examples / Presets Bar --- */
.quick-examples-container {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.examples-header {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.example-chips-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.example-chip {
  background-color: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 20px;
  padding: 0.3rem 0.75rem;
  font-size: 0.825rem;
  color: #334155;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}

.example-chip:hover {
  background-color: #e2e8f0;
  border-color: #cbd5e1;
  color: #0f172a;
}

.example-chip:active {
  background-color: #cbd5e1;
}

/* --- Buttons --- */
.btn {
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  transition: all 0.15s ease-in-out;
  text-decoration: none;
}

/* Primary Button (Translate) */
.btn-primary {
  background-color: var(--primary-color);
  color: var(--primary-text);
  padding: 0.6rem 1.4rem;
  font-weight: 600;
}

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

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

.btn-primary:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

/* Outline Buttons (Clear, Copy) */
.btn-outline {
  background-color: #ffffff;
  color: var(--btn-outline-text);
  border-color: var(--btn-outline-border);
  padding: 0.4rem 0.85rem;
  font-size: 0.875rem;
}

.btn-outline:hover {
  background-color: var(--btn-outline-hover-bg);
  border-color: #94a3b8;
}

.btn-outline:active {
  background-color: #e2e8f0;
}

/* Swap Button */
.btn-swap {
  background-color: #ffffff;
  color: var(--text-main);
  border: 1px solid var(--btn-outline-border);
  padding: 0.45rem 0.85rem;
  font-size: 0.875rem;
}

.btn-swap:hover {
  background-color: var(--btn-outline-hover-bg);
  border-color: #94a3b8;
}

.swap-icon {
  font-size: 1.1rem;
  line-height: 1;
}

/* --- Footer --- */
.footer {
  text-align: center;
  padding: 0.5rem 0;
  color: var(--text-muted);
  font-size: 0.875rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.footer-tip {
  color: #475569;
}

.footer-credit {
  color: #94a3b8;
  font-size: 0.8rem;
}

/* Subtle fade in */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}