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

:root {
  --bg: #050505;
  --surface: #0a0a0a;
  --surface-panel: #0d0d0d;

  /* Monochrome Contrast Hierarchy */
  --border-dim: #262626; /* Structural dividers */
  --border-button: #4a4a4a; /* Resting state for interactive elements */
  --border-hover: #888888; /* Hover state */
  --border-active: #ffffff; /* Selection/Focus state */

  --text: #ffffff;
  --text-muted: #737373;
  --accent: #ffffff;
}

/* BASE */
body {
  height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  overflow: hidden; /* Lock the viewport */
  -webkit-font-smoothing: antialiased;
}

/* NAVBAR */
nav {
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center; /* This centers the H1 horizontally */

  padding: 0 1.5rem;
  border-bottom: 1px solid var(--border-dim);
  background: var(--bg);
  position: relative; /* Useful if you add side-actions later */
}

nav h1 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.25em; /* Increased for a wider 'Cinematic' look */
  text-transform: uppercase;
  color: var(--text);

  /* Ensure it stays perfectly centered even if container changes */
  margin: 0 auto;
}

/* LAYOUT */
.columns {
  display: flex;
  height: calc(100vh - 56px);
}

/* PANELS */
.panel-left,
.panel-right {
  padding: 1.5rem;
  height: 100%;
}

.panel-left {
  width: 50%;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background: var(--surface);
  border-right: 1px solid var(--border-dim);
}

.panel-right {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: var(--surface);
  overflow: hidden; /* Prevents container-level scrollbars */
}

/* BUTTONS */
.button-row {
  display: flex;
  gap: 0.75rem;
}

#jd-button-row {
  justify-content: center;
  margin-top: 1rem;
}

.upload-button,
.download-button,
.convert-button,
.format-resume-button,
.jd-button,
.cancel-button,
.confirm-button {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 1rem;
  border-radius: 4px;
  text-decoration: none;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.upload-button svg,
.download-button svg,
.convert-button svg,
.format-resume-button svg,
.jd-button svg,
.cancel-button svg,
.confirm-button svg {
  width: 16px;
  height: 16px;
  opacity: 0.7;
}

/* Standard Buttons */
.upload-button,
.download-button,
.format-resume-button,
.jd-button,
.cancel-button {
  border: 1px solid var(--border-button);
  background: transparent;
  color: var(--text-muted);
}

.upload-button:hover,
.download-button:hover,
.format-resume-button:hover,
.jd-button:hover,
.cancel-button:hover {
  border-color: var(--border-hover);
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}

.upload-button:hover svg,
.download-button:hover svg,
.format-resume-button:hover svg,
.jd-button:hover svg,
.cancel-button:hover svg {
  opacity: 1;
}

/* PRIMARY ACTION: Inverted Convert Button */
.convert-button,
.confirm-button {
  border: 1px solid var(--text);
  background: var(--text);
  color: var(--bg);
}

.convert-button svg,
.confirm-button svg {
  filter: invert(1);
}

.convert-button:hover,
.confirm-button:hover {
  background: var(--bg);
  border-color: var(--text);
  color: var(--text);
}

.convert-button:hover svg,
.confirm-button:hover svg {
  filter: invert(0);
  opacity: 1;
}

/* SELECTION / ACTIVE STATES */
.upload-button:focus,
.upload-button:active,
.download-button:focus,
.download-button:active {
  border-color: var(--border-active);
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  outline: none;
}

.convert-button:active,
.confirm-button:active {
  transform: scale(0.985);
}

/* TEXTAREA (EDITOR) */
#resumeTextDisplay,
#jobDescriptionTextDisplay {
  flex: 1;
  width: 100%;
  resize: none;
  padding: 1.25rem;
  border: 1px solid var(--border-dim);
  border-radius: 4px;
  background: #080808;
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  line-height: 1.6;
  outline: none;
  transition: border-color 0.2s ease;
}

#resumeTextDisplay:focus,
#jobDescriptionTextDisplay:focus {
  border-color: var(--border-button);
}

#resumeTextDisplay::placeholder,
#jobDescriptionTextDisplay::placeholder {
  color: #333333;
}

/* FONT SIZE CONTROLS */
.bottom-controls {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.5rem;
}

.font-size-container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.font-size-label {
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  text-transform: uppercase;
}

.font-size-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 120px;
  height: 2px;
  background: var(--border-dim);
  outline: none;
}

.font-size-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 10px;
  height: 10px;
  background: var(--border-button);
  border-radius: 0;
  cursor: pointer;
  transition: background 0.2s;
}

.font-size-slider::-webkit-slider-thumb:hover {
  background: var(--border-active);
}

#fontSizeValue {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  font-weight: 500;
  color: #ffffff;
  display: inline-block;
  min-width: 2.5rem;
  text-align: right;
}

/* PREVIEW SECTION */
.preview-viewport {
  flex: 1; /* Occupy all available vertical space */
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: stretch; /* Stretch children to fill */
  overflow: hidden; /* Disable scrolling on this container */
  border: 1px solid var(--border-dim);
  border-radius: 4px;
  background: #000000;
}

.pdf-preview {
  width: 100%;
  height: 100%;
  border: none;
  background: white;
  /* Fixed width/height removed to allow the browser PDF UI to handle internal scrolling */
}

/* HTMX LOADING STATES */
.my-indicator {
  display: none !important;
}

.htmx-request.convert-button,
.htmx-request.format-resume-button,
.htmx-request.jd-button {
  background: var(--bg) !important;
  color: var(--text) !important;
  border-color: var(--border-active) !important;
  pointer-events: none;
}

.htmx-request.convert-button .button-text,
.htmx-request.convert-button svg,
.htmx-request.format-resume-button .button-text,
.htmx-request.format-resume-button svg,
.htmx-request.jd-button .button-text,
.htmx-request.jd-button svg {
  display: none !important;
}

.htmx-request.convert-button .my-indicator,
.htmx-request.format-resume-button .my-indicator,
.htmx-request.jd-button .my-indicator {
  display: inline-block !important;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% {
    opacity: 0.4;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0.4;
  }
}

/* UTILITY */
.placeholder-mode {
  color: var(--text-muted) !important;
}

/* MODAL STYLING */
.modal {
  background: var(--surface);
  border: 1px solid var(--border-active);
  border-radius: 4px;
  padding: 2rem;
  width: 90%;
  max-width: 600px;
  color: var(--text);
  /* Centers the dialog in the viewport */
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
  outline: none; /* Removes the blue border */
}

/* THE CINEMATIC BACKDROP */
.modal::backdrop {
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
}

.modal h2 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-dim);
  padding-bottom: 0.75rem;
}