/* ============================================================
   Tempo Timesheet Automation - Case Study Presentation
   Light theme based on Figma Case Study Presentation Template
   Fonts: DM Sans (headings), DM Mono (labels)
   Colors: #1D1A1B on #FFFFFF
   ============================================================ */

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

:root {
  --color-dark: #1d1a1b;
  --color-white: #ffffff;
  --color-bg: #fafafa;
  --color-muted: #6b6b6b;
  --color-light-gray: #e8e8e8;
  --color-mid-gray: #a0a0a0;
  --color-accent: #1d1a1b;
  --color-green: #2d8a4e;
  --color-red: #c0392b;
  --color-blue: #2563eb;
  --bar-width: 96px;
  --bar-height: 16px;
  --bar-radius: 3px;
  --max-width: 1100px;
  --section-padding: 8rem 2rem;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--color-white);
  color: var(--color-dark);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* --- Scrollbar (subtle) --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-white); }
::-webkit-scrollbar-thumb { background: var(--color-light-gray); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-mid-gray); }

/* --- Navigation --- */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-light-gray);
  padding: 0.75rem 0;
}

nav .nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

nav .nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'DM Mono', monospace;
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--color-dark);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

nav .nav-brand img {
  width: 24px;
  height: 24px;
  border-radius: 3px;
}

nav .nav-links {
  display: flex;
  gap: 0;
}

nav .nav-links a {
  color: var(--color-muted);
  text-decoration: none;
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.5rem 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  transition: color 0.2s;
  position: relative;
}

nav .nav-links a:hover {
  color: var(--color-dark);
}

nav .nav-links a.active {
  color: var(--color-dark);
}

/* --- Section Label (Figma template style) --- */
.section-label {
  font-family: 'DM Mono', monospace;
  font-weight: 500;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-dark);
  margin-bottom: 0.5rem;
}

.section-bar {
  width: var(--bar-width);
  height: var(--bar-height);
  background: var(--color-dark);
  border-radius: var(--bar-radius);
  margin-bottom: 3rem;
}

/* --- Sections --- */
section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--section-padding);
}

section + section {
  border-top: 1px solid var(--color-light-gray);
}

.section-title {
  font-family: 'DM Sans', sans-serif;
  font-size: 3rem;
  font-weight: 400;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  color: var(--color-dark);
  max-width: 800px;
}

.section-subtitle {
  font-size: 1.15rem;
  color: var(--color-muted);
  max-width: 650px;
  margin-bottom: 3.5rem;
  line-height: 1.8;
}

/* --- Cover / Hero --- */
.cover {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 6rem 2rem 4rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.cover-title {
  font-family: 'DM Sans', sans-serif;
  font-size: 5rem;
  font-weight: 400;
  line-height: 1.05;
  color: var(--color-dark);
  margin-bottom: 1.5rem;
}

.cover-title span {
  color: var(--color-mid-gray);
}

.cover-meta {
  font-family: 'DM Mono', monospace;
  font-size: 0.85rem;
  color: var(--color-muted);
  letter-spacing: 0.5px;
  margin-bottom: 4rem;
}

.process-timeline {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.process-step {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.process-step-label {
  font-family: 'DM Mono', monospace;
  font-weight: 500;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-dark);
}

.process-step-bar {
  width: var(--bar-width);
  height: var(--bar-height);
  background: var(--color-dark);
  border-radius: var(--bar-radius);
}

.process-step a {
  text-decoration: none;
  color: inherit;
}

.process-step a:hover .process-step-label {
  color: var(--color-muted);
}

/* --- Stats Grid --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin: 3rem 0;
}

.stat-card {
  padding: 0;
}

.stat-number {
  font-family: 'DM Sans', sans-serif;
  font-size: 3.5rem;
  font-weight: 400;
  line-height: 1;
  color: var(--color-dark);
  margin-bottom: 0.5rem;
}

.stat-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-muted);
}

/* --- Two Column Layout --- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.two-col-wide {
  grid-template-columns: 2fr 1fr;
}

/* --- Data Table --- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
}

.data-table th,
.data-table td {
  padding: 1rem 0;
  text-align: left;
  border-bottom: 1px solid var(--color-light-gray);
  font-size: 0.95rem;
}

.data-table th {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-muted);
  font-weight: 500;
  padding-bottom: 0.75rem;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table .highlight td {
  font-weight: 500;
  padding-top: 1.25rem;
  color: var(--color-dark);
}

/* --- Comparison (Before/After) --- */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin: 2rem 0;
}

.comparison-col h3 {
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-dark);
  margin-bottom: 1.25rem;
}

.comparison-col.after h3 {
  border-bottom-color: var(--color-green);
  color: var(--color-green);
}

.comparison-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--color-light-gray);
  font-size: 0.95rem;
}

.comparison-row:last-child {
  border-bottom: none;
}

.comparison-row .label {
  color: var(--color-muted);
}

.comparison-row .value {
  font-weight: 500;
  text-align: right;
}

.comparison-row .value.green {
  color: var(--color-green);
}

.comparison-row .value.red {
  color: var(--color-red);
}

/* --- Flow Steps --- */
.flow-steps {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2rem;
  margin: 3rem 0;
}

.flow-step {
  position: relative;
  padding: 2rem 0;
}

.flow-step-number {
  font-family: 'DM Sans', sans-serif;
  font-size: 4rem;
  font-weight: 400;
  color: var(--color-light-gray);
  line-height: 1;
  margin-bottom: 1rem;
}

.flow-step h3 {
  font-family: 'DM Sans', sans-serif;
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.flow-step p {
  color: var(--color-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- Feature List --- */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin: 2rem 0;
}

.feature-item {
  padding: 1.5rem 2rem 1.5rem 0;
  border-bottom: 1px solid var(--color-light-gray);
}

.feature-item:nth-child(even) {
  padding-left: 2rem;
  border-left: 1px solid var(--color-light-gray);
}

.feature-item h4 {
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
}

.feature-item p {
  color: var(--color-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* --- Code Block --- */
.code-block {
  background: var(--color-bg);
  border: 1px solid var(--color-light-gray);
  border-radius: 4px;
  padding: 1.5rem 2rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.85rem;
  line-height: 1.8;
  overflow-x: auto;
  color: var(--color-dark);
  margin: 1.5rem 0;
}

.code-block .comment { color: var(--color-mid-gray); }
.code-block .keyword { color: var(--color-muted); }
.code-block .success { color: var(--color-green); font-weight: 500; }
.code-block .info { color: var(--color-blue); }

/* --- Screenshots --- */
.screenshot-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
}

.screenshot-card {
  border: 1px solid var(--color-light-gray);
  border-radius: 4px;
  overflow: hidden;
  transition: box-shadow 0.2s;
}

.screenshot-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.screenshot-card img {
  width: 100%;
  height: auto;
  display: block;
  border-bottom: 1px solid var(--color-light-gray);
}

.screenshot-caption {
  padding: 1rem 1.25rem;
}

.screenshot-caption strong {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.screenshot-caption p {
  color: var(--color-muted);
  font-size: 0.8rem;
  margin: 0;
  line-height: 1.5;
}

/* --- Architecture --- */
.arch-diagram {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 2rem 0;
  align-items: center;
}

.arch-row {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.arch-box {
  border: 1px solid var(--color-light-gray);
  border-radius: 4px;
  padding: 0.6rem 1.25rem;
  text-align: center;
  min-width: 140px;
  background: var(--color-white);
}

.arch-box.highlight {
  border-color: var(--color-dark);
  border-width: 2px;
}

.arch-box .class-name {
  font-family: 'DM Mono', monospace;
  font-weight: 500;
  font-size: 0.8rem;
  letter-spacing: 0.5px;
}

.arch-box .class-info {
  font-size: 0.75rem;
  color: var(--color-muted);
  margin-top: 0.15rem;
}

.arch-arrow {
  text-align: center;
  color: var(--color-mid-gray);
  font-size: 1rem;
  line-height: 1;
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: 2rem;
  margin: 2rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-dark);
}

.timeline-item {
  position: relative;
  padding: 0 0 2rem 2rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0.5rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-dark);
  transform: translateX(-3px);
}

.timeline-item .version-tag {
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-dark);
}

.timeline-item .date {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin: 0.15rem 0 0.35rem;
}

.timeline-item h3 {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.timeline-item p {
  color: var(--color-muted);
  font-size: 0.9rem;
}

/* --- ROI Highlight --- */
.roi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin: 3rem 0;
}

.roi-card {
  text-align: center;
  padding: 2.5rem 1.5rem;
  border: 1px solid var(--color-light-gray);
  border-radius: 4px;
}

.roi-card .roi-number {
  font-family: 'DM Sans', sans-serif;
  font-size: 3.5rem;
  font-weight: 400;
  line-height: 1;
  color: var(--color-dark);
  margin-bottom: 0.5rem;
}

.roi-card .roi-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-muted);
  margin-bottom: 0.35rem;
}

.roi-card .roi-detail {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.roi-card.primary {
  border-color: var(--color-dark);
  border-width: 2px;
}

/* --- Badges / Tags --- */
.tag {
  display: inline-block;
  font-family: 'DM Mono', monospace;
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--color-light-gray);
  border-radius: 3px;
  color: var(--color-muted);
}

.tag.dark {
  background: var(--color-dark);
  color: var(--color-white);
  border-color: var(--color-dark);
}

/* --- Roadmap --- */
.roadmap-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1.5rem;
  margin: 2rem 0;
}

.roadmap-item {
  padding: 1.5rem;
  border: 1px solid var(--color-light-gray);
  border-radius: 4px;
}

.roadmap-item h4 {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.roadmap-item p {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

/* --- Footer --- */
footer {
  border-top: 1px solid var(--color-light-gray);
  padding: 4rem 2rem;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.9rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

footer a {
  color: var(--color-dark);
  text-decoration: none;
  font-weight: 500;
}

footer a:hover {
  text-decoration: underline;
}

/* --- Page View Counter --- */
.page-views {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.2rem;
  background: rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

.page-views .view-icon {
  font-size: 1rem;
}

.page-views .view-count {
  font-weight: 800;
  color: var(--color-blue);
  font-size: 1rem;
}

.page-views .view-sep {
  color: var(--color-light-gray);
  margin: 0 0.15rem;
}

footer .footer-brand {
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-dark);
  margin-bottom: 0.5rem;
}

/* --- Divider --- */
.divider {
  width: 48px;
  height: 2px;
  background: var(--color-dark);
  margin: 2rem 0;
}

/* --- Blockquote --- */
.callout {
  border-left: 3px solid var(--color-dark);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  font-size: 1.1rem;
  color: var(--color-dark);
  font-style: italic;
  line-height: 1.7;
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .cover-title { font-size: 3.5rem; }
  .section-title { font-size: 2.25rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; gap: 2rem; }
  .two-col-wide { grid-template-columns: 1fr; }
  .comparison-grid { grid-template-columns: 1fr; gap: 2rem; }
  .flow-steps { grid-template-columns: 1fr; gap: 1rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-item:nth-child(even) { padding-left: 0; border-left: none; }
  .screenshot-gallery { grid-template-columns: 1fr; }
  .roi-grid { grid-template-columns: 1fr; }
  .roadmap-grid { grid-template-columns: 1fr; }
  .timeline-col-layout { grid-template-columns: 1fr; }
  nav .nav-links { display: none; }
  section { padding: 4rem 1.5rem; }
}

@media (max-width: 480px) {
  .cover { padding: 4rem 1.25rem 3rem; }
  .cover-title { font-size: 2.5rem; }
  .section-title { font-size: 1.75rem; }
  .stat-number { font-size: 2.5rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .process-timeline { gap: 0.5rem; }
}

/* --- Utility --- */
.text-muted { color: var(--color-muted); }
.text-center { text-align: center; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

/* --- Timeline two-column layout --- */
.timeline-col-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}