/* VEX Robotics SPA Stylesheet */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700;800;900&display=swap');

:root {
  /* Default: Dark Theme */
  --bg-base: #08090b;
  --bg-surface: #101216;
  --bg-surface-hover: #171a21;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-hover: rgba(255, 255, 255, 0.16);
  --accent: #ff6b00;
  --accent-hover: #ff8533;
  --accent-glow: rgba(255, 107, 0, 0.35);
  --shadow: rgba(0, 0, 0, 0.5);
  --shadow-glow: rgba(255, 107, 0, 0.1);
  --grid-opacity: 0.08;
  
  --glass-bg: rgba(16, 18, 22, 0.8);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: rgba(0, 0, 0, 0.4);
  
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  --transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 400ms cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-slow: 700ms cubic-bezier(0.25, 1, 0.5, 1);
}

html.light-theme,
body.light-theme {
  --bg-base: #f6f8fa;
  --bg-surface: #ffffff;
  --bg-surface-hover: #f1f3f6;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-color: rgba(15, 23, 42, 0.08);
  --border-color-hover: rgba(15, 23, 42, 0.15);
  --accent: #ff5500;
  --accent-hover: #e04a00;
  --accent-glow: rgba(255, 85, 0, 0.2);
  --shadow: rgba(15, 23, 42, 0.06);
  --shadow-glow: rgba(255, 85, 0, 0.05);
  --grid-opacity: 0.04;
  
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(15, 23, 42, 0.08);
  --glass-shadow: rgba(15, 23, 42, 0.04);
}

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

html {
  scroll-behavior: smooth;
  color: var(--text-main);
  background-color: var(--bg-base);
  font-family: var(--font-body);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Technical Grid Overlay */
.technical-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    linear-gradient(to right, var(--border-color) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-color) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: var(--grid-opacity);
  pointer-events: none;
  z-index: 1;
  transition: opacity var(--transition-normal);
}

/* Utility Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 800ms cubic-bezier(0.25, 1, 0.5, 1), transform 800ms cubic-bezier(0.25, 1, 0.5, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

/* --- Sticky Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 4rem;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 4px 30px var(--glass-shadow);
  transition: background-color var(--transition-normal), border var(--transition-normal);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.brand-dot {
  width: 10px;
  height: 10px;
  background-color: var(--accent);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 10px var(--accent);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-menu.hidden {
  display: none !important;
}

/* Dashboard sidebar hamburger toggle (hidden on desktop) */
.dash-sidebar-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.dash-sidebar-toggle:hover {
  border-color: var(--accent);
  color: var(--text-main);
}

.nav-link {
  font-size: 0.85rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  position: relative;
  padding: 0.5rem 0;
}

.nav-link:hover {
  color: var(--text-main);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-normal);
}

.nav-link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

/* Theme Toggle Button */
.btn-toggle-theme {
  background: none;
  border: 1px solid var(--border-color);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.btn-toggle-theme:hover {
  border-color: var(--accent);
  background-color: var(--bg-surface-hover);
  box-shadow: 0 0 10px var(--accent-glow);
}

.theme-icon-sun {
  display: none;
}

.light-theme .theme-icon-moon {
  display: none;
}

.light-theme .theme-icon-sun {
  display: block;
}

/* Buttons */
.btn-login {
  padding: 0.6rem 1.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--accent);
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 0 5px rgba(255, 107, 0, 0.1);
}

.btn-login:hover {
  background-color: var(--accent);
  color: #ffffff;
  box-shadow: 0 0 15px var(--accent-glow);
  transform: translateY(-1px);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 4rem 4rem 4rem;
  overflow: hidden;
  z-index: 2;
}

/* Subtle Animated Canvas or Backdrop Particles background wrapper */
.hero-canvas-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.hero-radial-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80%;
  height: 80%;
  background: radial-gradient(circle, var(--shadow-glow) 0%, transparent 60%);
  z-index: 2;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 1100px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.hero-tagline {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 4.5rem;
  line-height: 1.1;
  font-weight: 900;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  max-width: 900px;
}

.hero-title span {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--text-main);
}

.light-theme .hero-title span {
  -webkit-text-stroke: 1.5px var(--text-main);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 650px;
  margin-bottom: 3rem;
  font-weight: 300;
}

.hero-ctas {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
}

.btn-primary {
  padding: 1rem 2.25rem;
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background-color: var(--accent);
  color: #ffffff;
  border: 1px solid var(--accent);
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: 0 6px 20px var(--accent-glow);
  transform: translateY(-2px);
}

.btn-secondary {
  padding: 1rem 2.25rem;
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background-color: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  border-color: var(--text-main);
  background-color: var(--bg-surface-hover);
  transform: translateY(-2px);
}

/* --- Section Formatting --- */
.section {
  position: relative;
  padding: 8rem 4rem;
  z-index: 2;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  margin-bottom: 5rem;
  position: relative;
}

.section-tag {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 0.75rem;
  display: block;
}

.section-title-large {
  font-size: 2.8rem;
  text-transform: uppercase;
  font-weight: 800;
  max-width: 600px;
  line-height: 1.1;
}

/* --- Showcase Grid (VEX R&D / Engineering Notebook) --- */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
}

/* 3D Tilt perspective wrapper */
.showcase-card-wrapper {
  perspective: 1000px;
}

.showcase-card {
  position: relative;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: 
    border var(--transition-fast), 
    box-shadow var(--transition-fast);
  transform-style: preserve-3d;
  transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
}

.showcase-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
    800px circle at var(--x, 0px) var(--y, 0px),
    rgba(255, 107, 0, 0.08),
    transparent 40%
  );
  z-index: 2;
  pointer-events: none;
}

.showcase-card:hover {
  border-color: var(--accent);
  box-shadow: 
    0 10px 30px rgba(0, 0, 0, 0.15), 
    0 0 15px var(--accent-glow);
}

.card-image-container {
  width: 100%;
  height: 240px;
  overflow: hidden;
  position: relative;
  border-bottom: 1px solid var(--border-color);
}

.card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.showcase-card:hover .card-image {
  transform: scale(1.05);
}

.card-content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-meta {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  font-weight: 300;
  margin-bottom: 1.5rem;
}

.card-link {
  margin-top: auto;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-main);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.card-link svg {
  transition: transform var(--transition-fast);
}

.showcase-card:hover .card-link svg {
  transform: translateX(4px);
}

/* --- Timeline & Stats Section --- */
.milestones-section {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.stats-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding: 3rem;
  background-color: var(--bg-base);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 6rem;
  box-shadow: 0 4px 20px var(--shadow);
}

.stat-item {
  text-align: center;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -1px;
  top: 15%;
  height: 70%;
  width: 1px;
  background-color: var(--border-color);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  font-weight: 500;
}

/* Timeline Layout */
.timeline-wrapper {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 0;
}

.timeline-line {
  position: absolute;
  left: 50%;
  top: 0;
  width: 2px;
  height: 100%;
  background-color: var(--border-color);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  display: flex;
  margin-bottom: 4rem;
  width: 100%;
}

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

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--bg-surface);
  border: 3px solid var(--accent);
  transform: translateX(-50%);
  z-index: 5;
  box-shadow: 0 0 10px var(--accent-glow);
  transition: background-color var(--transition-fast);
}

.timeline-item:hover .timeline-dot {
  background-color: var(--accent);
}

.timeline-content {
  width: 45%;
  background-color: var(--bg-base);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  position: relative;
  box-shadow: 0 4px 12px var(--shadow);
  transition: border-color var(--transition-fast);
}

.timeline-item:hover .timeline-content {
  border-color: var(--accent);
}

.timeline-item:nth-child(odd) .timeline-content {
  margin-left: auto;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-right: auto;
}

.timeline-date {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.timeline-title {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

.timeline-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 300;
}

/* --- Contact Section --- */
.contact-section {
  padding: 8rem 4rem;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.contact-info-title {
  font-size: 2.2rem;
  text-transform: uppercase;
  font-weight: 800;
  margin-bottom: 1.5rem;
}

.contact-info-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  font-weight: 300;
  margin-bottom: 3rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-detail-item {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: 4px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.contact-detail-text h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.contact-detail-text p {
  font-size: 1rem;
  font-weight: 500;
}

/* Contact Form Styling */
.contact-form {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 3rem;
  box-shadow: 0 4px 30px var(--shadow);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.form-group label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea {
  width: 100%;
  background-color: var(--bg-base);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 1rem 1.25rem;
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.btn-submit {
  width: 100%;
  height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.submit-spinner {
  display: none;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

@keyframes spin {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.contact-form.loading .submit-text {
  visibility: hidden;
}

.contact-form.loading .submit-spinner {
  display: block;
}

.form-response-msg {
  display: none;
  padding: 1rem;
  border-radius: 4px;
  font-size: 0.9rem;
  margin-top: 1.5rem;
  text-align: center;
}

.form-response-msg.success {
  display: block;
  background-color: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: #10b981;
}

/* --- Footer --- */
.footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 4rem 4rem 2rem 4rem;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 3rem;
}

.footer-info {
  max-width: 400px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.footer-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 300;
}

.footer-socials {
  display: flex;
  gap: 1.5rem;
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background-color: var(--bg-base);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.social-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
  transform: translateY(-2px);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Glassmorphism Login Modal --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(8, 9, 11, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-container {
  width: 100%;
  max-width: 450px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 3rem;
  box-shadow: 0 20px 50px var(--glass-shadow);
  transform: scale(0.95) translateY(20px);
  transition: transform var(--transition-normal);
  position: relative;
}

.modal-overlay.active .modal-container {
  transform: scale(1) translateY(0);
}

.btn-close-modal {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.btn-close-modal:hover {
  color: var(--text-main);
}

.modal-header {
  text-align: center;
  margin-bottom: 2rem;
}

.modal-title {
  font-size: 1.8rem;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

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

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  margin-bottom: 2rem;
  color: var(--text-muted);
}

.remember-me {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.remember-me input {
  accent-color: var(--accent);
}

.forgot-password {
  color: var(--accent);
}

.forgot-password:hover {
  text-decoration: underline;
}

.modal-error-msg {
  display: none;
  font-size: 0.85rem;
  color: #ef4444;
  background-color: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  padding: 0.75rem;
  border-radius: 4px;
  margin-bottom: 1.5rem;
  text-align: center;
}

.modal-error-msg.visible {
  display: block;
}

/* --- Member Dashboard Panel (Notion style SPA view) --- */
.app-view {
  transition: opacity var(--transition-normal);
}

.app-view.hidden {
  display: none !important;
}

/* Dashboard Layout */
.dashboard-view {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-base);
}

.dashboard-nav {
  height: 70px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-surface);
}

.dash-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--accent);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.dashboard-main {
  flex-grow: 1;
  display: grid;
  grid-template-columns: 260px 1fr;
  height: calc(100vh - 70px);
  overflow: hidden;
}

/* Left Sidebar (Notion style) */
.dash-sidebar {
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 1.5rem 1rem;
}

.sidebar-section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  font-weight: 600;
  margin-bottom: 1rem;
  padding-left: 0.5rem;
}

.doc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 2rem;
}

.doc-item-btn {
  width: 100%;
  background: none;
  border: none;
  padding: 0.6rem 0.8rem;
  border-radius: 6px;
  text-align: left;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: all var(--transition-fast);
}

.doc-item-btn:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-main);
}

.doc-item-btn.active {
  background-color: var(--bg-surface-hover);
  color: var(--text-main);
  font-weight: 500;
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
}

.doc-tag {
  font-size: 0.65rem;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  background-color: rgba(255, 107, 0, 0.1);
  color: var(--accent);
  margin-left: auto;
  font-weight: 600;
}

/* Double Pane Content */
.dash-content-container {
  display: grid;
  grid-template-columns: 1fr 340px;
  height: 100%;
  overflow: hidden;
}

/* Center Content pane (Viewer / Editor) */
.content-pane {
  padding: 3rem 4rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  background-color: var(--bg-base);
}

.pane-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
}

.doc-title-area h2 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.doc-meta {
  display: flex;
  gap: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.meta-field span {
  font-weight: 600;
  color: var(--text-main);
}

.doc-actions {
  display: flex;
  gap: 0.75rem;
}

.btn-icon-label {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* PDF Export Success Toast */
.toast-msg {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 1rem 1.5rem;
  box-shadow: 0 10px 30px var(--shadow), 0 0 10px var(--accent-glow);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 3000;
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-normal);
}

.toast-msg.visible {
  transform: translateY(0);
  opacity: 1;
}

.toast-icon {
  color: var(--accent);
  font-weight: bold;
}

/* Notion-style Document Viewer */
.document-viewer {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-main);
}

.document-viewer h3 {
  font-size: 1.4rem;
  margin: 2rem 0 1rem 0;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.document-viewer p {
  margin-bottom: 1.5rem;
  font-weight: 300;
}

.callout-box {
  background-color: var(--bg-surface-hover);
  border-left: 4px solid var(--accent);
  border-radius: 0 6px 6px 0;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  gap: 1rem;
  font-size: 0.95rem;
}

.callout-icon {
  font-size: 1.2rem;
  line-height: 1;
}

.callout-content {
  font-weight: 300;
}

.code-block {
  font-family: 'Courier New', Courier, monospace;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 1.25rem;
  border-radius: 6px;
  font-size: 0.85rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

/* Advanced Writer (Notion style Rich Editor) */
.editor-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 1rem;
}

.editor-toolbar {
  display: flex;
  gap: 0.25rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.4rem;
  align-items: center;
  flex-wrap: wrap;
}

.toolbar-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.toolbar-btn:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-main);
}

.toolbar-separator {
  width: 1px;
  height: 20px;
  background-color: var(--border-color);
  margin: 0 0.4rem;
}

.editor-container {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--bg-surface);
  min-height: 350px;
  display: flex;
  flex-direction: column;
}

.editor-body {
  flex-grow: 1;
  padding: 2rem;
  outline: none;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  overflow-y: auto;
}

.editor-body[placeholder]:empty:before {
  content: attr(placeholder);
  color: var(--text-muted);
  opacity: 0.6;
}

.editor-metadata-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 1.5rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
}

.meta-input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.meta-input-group label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
}

.meta-static-val {
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 0;
  border-bottom: 1px solid transparent;
}

.meta-select {
  background-color: var(--bg-base);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.6rem 0.8rem;
  color: var(--text-main);
  outline: none;
  font-family: var(--font-body);
  font-size: 0.85rem;
}

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

.editor-footer-actions {
  display: flex;
  justify-content: flex-end;
}

/* Right Pane: Change Log & Version Control */
.changelog-pane {
  background-color: var(--bg-surface);
  border-left: 1px solid var(--border-color);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.changelog-header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.changelog-title {
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

.changelog-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.changelog-timeline {
  position: relative;
  flex-grow: 1;
  padding-left: 1rem;
}

.changelog-timeline-line {
  position: absolute;
  left: 0;
  top: 0;
  width: 1px;
  height: 100%;
  background-color: var(--border-color);
}

.changelog-item {
  position: relative;
  padding-bottom: 2rem;
}

.changelog-item::before {
  content: '';
  position: absolute;
  left: -13.5px;
  top: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent);
  border: 2px solid var(--bg-surface);
  box-shadow: 0 0 6px var(--accent-glow);
}

.changelog-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.changelog-item-time {
  font-weight: 500;
}

.changelog-item-user {
  font-weight: 600;
  color: var(--text-main);
}

.changelog-item-body {
  font-size: 0.85rem;
  line-height: 1.5;
  margin-bottom: 0.5rem;
}

/* Micro badges for edit modes */
.change-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.05rem 0.3rem;
  border-radius: 3px;
}

.change-badge.add {
  background-color: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.change-badge.mod {
  background-color: rgba(245, 158, 11, 0.1);
  color: #f59e0b;
}

.change-badge.del {
  background-color: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

/* --- Responsive Adjustments --- */
@media (max-width: 1024px) {
  .navbar {
    padding: 0 2rem;
  }
  .hero-title {
    font-size: 3.5rem;
  }
  .showcase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-board {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 2rem;
  }
  .stat-item:not(:last-child)::after {
    display: none;
  }
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  .dash-content-container {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr auto;
  }
  .changelog-pane {
    border-left: none;
    border-top: 1px solid var(--border-color);
    padding: 2rem;
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 0 1.5rem;
  }
  .nav-menu {
    display: none; /* simple responsive bypass for high-fidelity code display */
  }
  .hero {
    padding: 80px 1.5rem 2rem 1.5rem;
  }
  .hero-title {
    font-size: 2.5rem;
  }
  .hero-ctas {
    flex-direction: column;
    width: 100%;
  }
  .btn-primary, .btn-secondary {
    width: 100%;
  }
  .section {
    padding: 4rem 1.5rem;
  }
  .showcase-grid {
    grid-template-columns: 1fr;
  }
  .timeline-line {
    left: 1.5rem;
  }
  .timeline-dot {
    left: 1.5rem;
  }
  .timeline-content {
    width: calc(100% - 3rem);
    margin-left: 3rem !important;
    margin-right: 0 !important;
  }
  .dashboard-main {
    grid-template-columns: 1fr;
  }

  /* Show hamburger toggle on mobile */
  .dash-sidebar-toggle {
    display: flex;
  }

  /* Sidebar: hidden by default, slides in as overlay when toggled */
  .dash-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    z-index: 1500;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    box-shadow: 4px 0 20px var(--shadow);
  }
  .dash-sidebar.sidebar-open {
    transform: translateX(0);
  }
}