@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;600&family=IBM+Plex+Sans:wght@400;600&display=swap');

:root {
  /* Colors */
  --color-white: #FFFFFF;
  --color-gray-10: #F4F4F4;
  --color-gray-20: #E0E0E0;
  --color-gray-30: #C6C6C6;
  --color-gray-60: #6F6F6F;
  --color-gray-70: #525252;
  --color-gray-90: #262626;
  --color-gray-100: #161616;
  --color-blue-60: #0043CE;
  --color-blue-80: #002D9C; /* Carbon Blue 80 */
  
  /* Typography */
  --font-sans: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  /* Spacing */
  --spacing-8: 8px;
  --spacing-16: 16px;
  --spacing-24: 24px;
  --spacing-32: 32px;
  --spacing-48: 48px;
  --spacing-64: 64px;
}

/* Global Resets */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-white);
  color: var(--color-gray-100);
  line-height: 1.5;
  font-size: 16px; /* Body = 16px/400 */
  font-weight: 400;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
}

a {
  color: var(--color-gray-100);
  text-decoration: none;
  transition: color 150ms ease;
}

a:hover {
  color: var(--color-blue-60);
}

ul {
  list-style: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

/* Typography Classes */
.text-hero {
  font-size: 54px;
  font-weight: 600;
  line-height: 1.2;
}

.text-section-title {
  font-size: 36px;
  font-weight: 400;
  line-height: 1.3;
}

.text-body {
  font-size: 16px;
  font-weight: 400;
}

.text-caption {
  font-size: 12px;
  font-weight: 400;
}

/* Layout Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-32);
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-gray-20);
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.nav-brand {
  font-weight: 600;
  font-size: 16px;
}

.nav-links {
  display: flex;
  gap: var(--spacing-32);
}

.nav-links a {
  font-size: 14px;
}

.nav-actions {
  display: flex;
  gap: var(--spacing-16);
  align-items: center;
}

.nav-action-btn {
  background: transparent;
  border: none;
  color: var(--color-gray-100);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 2px;
  transition: color 150ms ease, background-color 150ms ease;
}

.nav-action-btn svg {
  width: 20px;
  height: 20px;
}

.nav-action-btn:hover {
  color: var(--color-blue-60);
  background-color: var(--color-gray-10);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-16) var(--spacing-64);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 400;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: 2px;
  text-decoration: none;
  transition: background-color 150ms ease, border-color 150ms ease;
}

.btn-primary {
  background-color: var(--color-blue-60);
  color: var(--color-white);
}

.btn-primary:active,
.btn-primary:focus {
  background-color: var(--color-blue-80);
}

.btn-primary:hover {
  background-color: #0353e9; /* slightly lighter blue for hover, blue-80 for active */
  color: var(--color-white);
}

.btn-secondary {
  /* Ghost style */
  background-color: transparent;
  border-color: var(--color-blue-60);
  color: var(--color-blue-60);
}

.btn-secondary:hover {
  background-color: var(--color-blue-60);
  color: var(--color-white);
}

.btn-secondary:active {
  background-color: var(--color-blue-80);
  border-color: var(--color-blue-80);
}

/* Hero Section */
.hero {
  padding: 128px 0; /* ~2 * 64px */
  background-color: var(--color-white);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-64);
  align-items: center;
}

.hero-content h1 {
  margin-bottom: var(--spacing-16);
}

.hero-tagline {
  font-size: 20px;
  font-weight: 400;
  color: var(--color-gray-100);
  margin-bottom: var(--spacing-48);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual svg {
  width: 100%;
  max-width: 400px;
  color: var(--color-blue-60);
}

/* Animating SVG Grid */
@keyframes dash {
  to {
    stroke-dashoffset: 0;
  }
}

.animated-path {
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  animation: dash 5s linear forwards alternate infinite;
}

/* Services */
.services {
  background-color: var(--color-gray-10);
  padding: var(--spacing-64) 0;
  border-top: 1px solid var(--color-gray-20);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-32);
}

.service-card {
  background-color: var(--color-white);
  padding: var(--spacing-32);
  border-top: 1px solid var(--color-blue-60);
}

.service-icon {
  margin-bottom: var(--spacing-16);
  color: var(--color-blue-60);
}

.service-icon svg {
  width: 24px;
  height: 24px;
}

.service-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--spacing-16);
}

.service-desc {
  font-size: 14px;
  color: var(--color-gray-70);
  line-height: 1.5;
}

/* Tech Stack */
.tech-stack {
  background-color: var(--color-gray-10);
  padding: var(--spacing-48) 0;
  border-top: 1px solid var(--color-gray-20);
}

.tech-stack-label {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  color: var(--color-gray-60);
  text-align: center;
  margin-bottom: var(--spacing-32);
}

.tech-logos {
  display: flex;
  justify-content: center;
  gap: var(--spacing-64);
  align-items: center;
  flex-wrap: wrap;
}

.tech-logo {
  color: var(--color-gray-60);
  transition: color 150ms ease;
  display: flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  gap: var(--spacing-8);
}

.tech-logo svg {
  width: 32px;
  height: 32px;
  fill: currentColor;
}

.tech-logo:hover {
  color: var(--color-blue-60);
}

/* Featured Project */
.featured {
  padding: var(--spacing-64) 0;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-gray-20);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-32);
}

.project-card {
  background-color: var(--color-gray-10);
  padding: var(--spacing-32);
  border-top: 1px solid var(--color-gray-30);
  transition: background-color 150ms ease, border-color 150ms ease, box-shadow 150ms ease;
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-blue-60);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.github-link {
  color: var(--color-blue-60);
  font-weight: 400;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-8);
  margin-top: auto;
}

.github-link:hover {
  text-decoration: underline;
}

.carbon-list {
  margin-bottom: var(--spacing-24);
}

.carbon-list li {
  position: relative;
  padding-left: var(--spacing-24);
  margin-bottom: var(--spacing-16);
  font-size: 16px;
}

.carbon-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  width: 8px;
  height: 8px;
  background-color: var(--color-blue-60);
}

/* About / Company */
.about {
  padding: var(--spacing-64) 0;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-gray-20);
}

.about-header {
  margin-bottom: var(--spacing-64);
  text-align: center;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-64);
}

.timeline {
  position: relative;
  padding-left: var(--spacing-32);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background-color: var(--color-gray-20);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-48);
}

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

.timeline-item::before {
  content: '';
  position: absolute;
  left: -36px; /* -32px offset + half of 8px */
  top: 6px;
  width: 8px;
  height: 8px;
  background-color: var(--color-blue-60);
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-gray-60);
  margin-bottom: var(--spacing-8);
}

.timeline-content {
  font-size: 16px;
  font-weight: 600;
}

.about-info .mission {
  color: var(--color-gray-100);
  font-size: 16px;
  margin-bottom: var(--spacing-48);
}

.stats-grid {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-32);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 48px;
  font-weight: 600;
  color: var(--color-blue-60);
  line-height: 1;
  margin-bottom: var(--spacing-8);
}

.stat-label {
  font-size: 12px;
  color: var(--color-gray-70);
  text-transform: uppercase;
}

/* Footer Section */
footer {
  border-top: 1px solid var(--color-gray-20);
}

.footer-top {
  background-color: var(--color-gray-90);
  padding: var(--spacing-64) 0;
  text-align: center;
}

.footer-top h2 {
  color: var(--color-white);
  margin-bottom: var(--spacing-16);
}

.footer-top p {
  color: var(--color-gray-30);
  margin-bottom: var(--spacing-48);
}

.footer-actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-16);
}

.footer-bottom {
  background-color: var(--color-gray-100);
  padding: var(--spacing-24) 0;
  border-top: 1px solid var(--color-gray-70);
}

.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom-text {
  font-size: 14px;
  color: var(--color-white);
}

.footer-nav {
  display: flex;
  gap: var(--spacing-32);
}

.footer-nav a {
  font-size: 14px;
  color: var(--color-gray-30);
}

.footer-nav a:hover {
  color: var(--color-white);
}

.footer-social {
  display: flex;
  gap: var(--spacing-16);
}

.footer-social a {
  color: var(--color-gray-30);
  display: flex;
  align-items: center;
}

.footer-social a:hover {
  color: var(--color-white);
}

/* Scroll Animation Utilities */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 400ms ease-out, transform 400ms ease-out;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive constraints just basics */
@media (max-width: 768px) {
  .hero-grid,
  .services-grid,
  .projects-grid,
  .about-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
}

/* Navigation Dropdowns & Modals */
.overlay-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(22, 22, 22, 0.4);
  z-index: 1000;
  display: none;
  opacity: 0;
  transition: opacity 200ms ease;
}
.overlay-backdrop.active {
  display: block;
  opacity: 1;
}

/* Side Panel (Help) */
.side-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 320px;
  background: var(--color-white);
  z-index: 1001;
  border-left: 1px solid var(--color-gray-20);
  transform: translateX(100%);
  transition: transform 250ms cubic-bezier(0.2, 0, 0.38, 0.9);
  display: flex;
  flex-direction: column;
}
.side-panel.active {
  transform: translateX(0);
}
.panel-header {
  padding: var(--spacing-24);
  border-bottom: 1px solid var(--color-gray-20);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.panel-header h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-gray-100);
}
.close-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-gray-60);
  font-size: 16px;
}
.panel-content {
  padding: var(--spacing-24);
  flex-grow: 1;
  overflow-y: auto;
}
.quick-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-16) 0;
  border-bottom: 1px solid var(--color-gray-10);
  color: var(--color-blue-60);
  font-size: 14px;
}
.quick-link:hover {
  text-decoration: underline;
}
.about-company-block {
  margin-top: var(--spacing-32);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-gray-60);
  line-height: 1.6;
}
.panel-footer {
  padding: var(--spacing-24);
}
.btn-block {
  width: 100%;
}

/* Dropdowns (Language, User) */
.nav-actions {
  position: relative; /* Container for absolute dropdowns */
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--color-white);
  border: 1px solid var(--color-gray-20);
  box-shadow: 0 4px 8px rgba(0,0,0,0.05);
  display: none;
  z-index: 100;
  flex-direction: column;
  margin-top: 16px;
}
.nav-dropdown.active {
  display: flex;
}
.nav-dropdown-lang {
  width: 200px;
  border-top: 2px solid var(--color-blue-60);
}
.nav-dropdown-user {
  width: 160px;
}

.dropdown-header {
  padding: 16px 16px 8px; /* specific standard */
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--color-gray-60);
}

.lang-row {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  font-size: 14px;
  cursor: pointer;
  border-left: 2px solid transparent;
  gap: var(--spacing-8);
}
.lang-row:hover {
  background: var(--color-gray-10);
}
.lang-row.active {
  border-left-color: var(--color-blue-60);
  font-weight: 600;
}

.dropdown-user-header {
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  border-bottom: 1px solid var(--color-gray-20);
}
.avatar-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-blue-60);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--spacing-8);
}
.user-name {
  font-size: 14px;
  font-weight: 600;
}
.user-email {
  font-size: 12px;
  color: var(--color-gray-60);
}
.dropdown-item {
  padding: 12px 16px;
  font-size: 14px;
  color: var(--color-gray-100);
  cursor: pointer;
  text-decoration: none;
  background: none;
  border: none;
  text-align: left;
  width: 100%;
}
.dropdown-item:hover {
  background: var(--color-gray-10);
  color: var(--color-blue-60);
}
.dropdown-item.danger {
  color: #da1e28; /* Carbon red 60 */
  border-top: 1px solid var(--color-gray-20);
}
.dropdown-item.danger:hover {
  background: #fff1f1;
}

/* Page Layouts: Settings & Profile */
.page-container {
  padding: var(--spacing-64) 0;
  min-height: calc(100vh - 64px - 200px); /* rough math */
}
.breadcrumb {
  font-size: 14px;
  color: var(--color-gray-60);
  margin-bottom: var(--spacing-32);
}
.breadcrumb a {
  color: var(--color-gray-100);
}
.breadcrumb a:hover {
  color: var(--color-blue-60);
}

/* Sidebar pattern */
.layout-sidebar {
  display: flex;
  gap: var(--spacing-64);
}
.sidebar-nav {
  width: 250px;
  flex-shrink: 0;
}
.sidebar-nav-link {
  display: block;
  padding: var(--spacing-16);
  color: var(--color-gray-100);
  border-left: 2px solid transparent;
  font-size: 14px;
  cursor: pointer;
}
.sidebar-nav-link:hover {
  background: var(--color-gray-10);
}
.sidebar-nav-link.active {
  border-left-color: var(--color-blue-60);
  font-weight: 600;
  background: var(--color-gray-10);
}
.content-area {
  flex-grow: 1;
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-24);
}
.form-label {
  display: block;
  font-size: 12px;
  color: var(--color-gray-70);
  margin-bottom: var(--spacing-8);
}
.form-input {
  width: 100%;
  padding: 0 16px;
  height: 40px;
  font-family: var(--font-sans);
  font-size: 14px;
  border: none;
  border-bottom: 1px solid var(--color-gray-60);
  background: var(--color-gray-10);
}
.form-input:focus {
  outline: 2px solid var(--color-blue-60);
  outline-offset: -2px;
}

.setting-section {
  margin-bottom: var(--spacing-48);
  padding-bottom: var(--spacing-32);
  border-bottom: 1px solid var(--color-gray-20);
}
.setting-section-title {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  color: var(--color-gray-60);
  margin-bottom: var(--spacing-24);
}

/* Toggle Switch */
.toggle-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-16);
}
.toggle-label {
  font-size: 14px;
}
.toggle-switch {
  position: relative;
  width: 48px;
  height: 24px;
  background: var(--color-gray-60);
  border-radius: 12px;
  cursor: pointer;
  transition: background 200ms ease;
}
.toggle-switch.active {
  background: var(--color-blue-60);
}
.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  transition: transform 200ms ease;
}
.toggle-switch.active::after {
  transform: translateX(24px);
}

/* Sticky Save Bar */
.sticky-save-bar {
  position: sticky;
  bottom: 0;
  background: rgba(255, 255, 255, 0.95);
  padding: var(--spacing-24) 0;
  border-top: 1px solid var(--color-gray-20);
  display: none;
}
.sticky-save-bar.visible {
  display: block;
}

/* Toasts */
.toast-container {
  position: fixed;
  top: 80px;
  right: 32px;
  z-index: 2000;
}
.toast {
  background: #24a148; /* Carbon green 50 */
  color: white;
  padding: 16px;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 16px;
  width: 288px;
  opacity: 0;
  transform: translateY(-20px);
  transition: all 300ms ease;
}
.toast.active {
  opacity: 1;
  transform: translateY(0);
}

/* Profile specific */
.profile-header {
  display: flex;
  gap: var(--spacing-64);
  align-items: flex-start;
  margin-bottom: var(--spacing-64);
}
.avatar-upload {
  width: 160px;
  height: 160px;
  border: 1px dashed var(--color-gray-30);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  color: var(--color-gray-60);
  cursor: pointer;
  flex-shrink: 0;
}
.avatar-upload:hover {
  background: var(--color-gray-10);
  border-color: var(--color-blue-60);
  color: var(--color-blue-60);
}
.profile-form {
  flex-grow: 1;
}

/* Tag Pill */
.tag-pill {
  display: inline-block;
  background: var(--color-gray-10);
  padding: 4px 8px;
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-gray-100);
  margin-right: 8px;
}
.project-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 24px;
}
.project-date {
  font-size: 12px;
  color: var(--color-gray-60);
}

.indicator-dot {
  position: relative;
}
.indicator-dot::after {
  content: '';
  position: absolute;
  top: 8px;
  right: 8px;
  width: 8px;
  height: 8px;
  background-color: var(--color-blue-60);
  border-radius: 50%;
  border: 2px solid white;
  display: none;
}
/* Search Overlay */
.nav-search-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-blue-60);
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-24);
  z-index: 110;
  opacity: 0;
  pointer-events: none;
  transition: opacity 150ms ease;
}
.nav-search-overlay.active {
  opacity: 1;
  pointer-events: auto;
}
.nav-search-input {
  flex-grow: 1;
  height: 100%;
  border: none;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 16px;
  outline: none;
  padding: 0 var(--spacing-16);
}
.nav-search-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-gray-100);
}
.nav-search-close:hover {
  color: var(--color-blue-60);
}

.indicator-dot.active::after {
  display: block;
}

/* Project Details Page Styles */
.project-page {
    padding: 64px 0 128px;
    max-width: 900px;
    margin: 0 auto;
}
.project-back {
    display: inline-flex;
    align-items: center;
    color: var(--color-gray-60);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 48px;
}
.project-back svg {
    margin-right: 8px;
}
.project-back:hover {
    color: var(--color-blue-60);
}
.project-title {
    font-size: 48px;
    font-weight: 300;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}
.project-desc {
    font-size: 20px;
    color: var(--color-gray-60);
    margin-bottom: 32px;
    line-height: 1.5;
}
.project-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 64px;
}
.project-tag {
    border: 1px solid var(--color-gray-30);
    padding: 4px 12px;
    font-size: 12px;
    font-family: var(--font-mono);
    color: var(--color-gray-100);
}
.project-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-bottom: 64px;
}
.project-card {
    background-color: var(--color-gray-10);
    padding: 32px;
}
.project-card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    font-size: 20px;
    font-weight: 400;
    color: var(--color-gray-100);
}
.project-card-icon {
    color: var(--color-blue-60);
}
.project-card p {
    color: var(--color-gray-60);
    line-height: 1.6;
}