/**
 * Portfolio Website - Modern Clean Design
 * Professional styling with responsive layout
 */

:root {
  /* Colors */
  --bg-primary: #fbfaf7;
  --bg-secondary: #f2f0eb;
  --bg-tertiary: #e8e5de;
  --surface: #ffffff;
  --text-primary: #1f2523;
  --text-secondary: #5f6762;
  --text-light: #8a918b;
  --border-color: #d9d4ca;
  --accent-color: #9a5b1f;
  --accent-hover: #774414;
  --accent-soft: #f4e3cd;
  --support-color: #2f6f63;
  --success-color: #3f7f57;
  --shadow-sm: 0 1px 2px rgba(45, 38, 29, 0.06);
  --shadow-md: 0 4px 8px rgba(45, 38, 29, 0.08);
  --shadow-lg: 0 12px 24px rgba(45, 38, 29, 0.12);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --line-height-tight: 1.4;
  --line-height-normal: 1.6;
  --line-height-loose: 1.8;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--text-primary);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.65), rgba(251,250,247,0.95) 420px),
    var(--bg-primary);
  line-height: var(--line-height-normal);
  font-size: var(--font-size-base);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  line-height: var(--line-height-tight);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

p {
  margin-bottom: var(--spacing-md);
}

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

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

@media (max-width: 768px) {
  .container {
    padding: var(--spacing-md);
  }
}

/* Header Navigation */
header {
  background-color: rgba(242, 240, 235, 0.92);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
}

nav {
  display: flex;
  gap: var(--spacing-xl);
}

nav a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

nav a:hover,
nav a.active {
  color: var(--accent-color);
}

@media (max-width: 768px) {
  .header-content {
    padding: var(--spacing-md);
  }

  nav {
    gap: var(--spacing-lg);
  }

  nav a {
    font-size: var(--font-size-sm);
  }
}

/* Main Content Sections */
.page-section {
  padding: var(--spacing-3xl) 0;
  border-bottom: 1px solid var(--border-color);
}

.page-section:last-child {
  border-bottom: none;
}

/* Timeline Page Styles */
.timeline-page {
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.timeline-page.controls-collapsed {
  grid-template-columns: max-content minmax(0, 1fr);
  gap: var(--spacing-xl);
}

@media (max-width: 1024px) {
  .timeline-page {
    grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
    gap: var(--spacing-xl);
  }

  .timeline-page.controls-collapsed {
    grid-template-columns: max-content minmax(0, 1fr);
  }
}

@media (max-width: 768px) {
  .timeline-page {
    grid-template-columns: 1fr;
  }

  .timeline-page.controls-collapsed {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

/* Filters Sidebar */
.filters-sidebar {
  background-color: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: var(--spacing-lg);
  max-width: 320px;
  width: 100%;
  position: sticky;
  top: 90px;
  box-shadow: var(--shadow-sm);
}

.filters-sidebar.controls-collapsed {
  width: max-content;
  max-width: none;
  padding: 0;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

@media (max-width: 768px) {
  .filters-sidebar {
    position: static;
    margin-bottom: var(--spacing-lg);
  }

  .filters-sidebar.controls-collapsed {
    width: 100%;
    margin-bottom: var(--spacing-md);
  }
}

.filter-group {
  margin-bottom: var(--spacing-lg);
}

.filter-group:last-child {
  margin-bottom: 0;
}

.filter-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
}

.filter-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  cursor: pointer;
}

.filter-option input[type="checkbox"],
.filter-option input[type="radio"] {
  cursor: pointer;
  width: 16px;
  height: 16px;
}

.filter-option label {
  cursor: pointer;
  flex: 1;
  font-size: var(--font-size-sm);
}

.filter-option:hover label {
  color: var(--accent-color);
}

/* Sort Controls */
.sidebar-header {
  display: flex;
  justify-content: flex-start;
  margin-bottom: 0;
}

.icon-button {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.65rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background-color: var(--surface);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.icon-button:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
  background-color: var(--accent-soft);
}

.icon {
  display: inline-flex;
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
}

.filter-icon {
  display: inline-block;
  margin-right: 0.5rem;
  color: var(--accent-color);
  font-size: 1rem;
  vertical-align: middle;
}

.filter-controls {
  margin-top: var(--spacing-lg);
}

.sort-panel {
  margin: 0 0 var(--spacing-lg);
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--border-color);
  display: grid;
  gap: var(--spacing-sm);
}

.hidden {
  display: none !important;
}

.sort-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.sort-btn {
  flex: 1 1 88px;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
}

.sort-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.sort-btn.active {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
  color: white;
}

/* Timeline Container */
.timeline-container {
  position: relative;
  padding-left: 1.5rem;
}

.timeline-container::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, rgba(154, 91, 31, 0.25), var(--border-color));
}

@media (max-width: 768px) {
  .timeline-container {
    padding-left: 0;
  }

  .timeline-container::before {
    display: none;
  }
}

/* Timeline Entry Card */
.entry-card {
  position: relative;
  margin-bottom: var(--spacing-2xl);
  padding-left: 2.5rem;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .entry-card {
    padding-left: 0;
  }
}

.entry-card::before {
  content: '';
  position: absolute;
  left: -18px;
  top: 18px;
  width: 12px;
  height: 12px;
  background-color: var(--surface);
  border: 2px solid var(--support-color);
  border-radius: 50%;
}

.entry-card::after {
  content: '';
  position: absolute;
  left: -12px;
  top: 34px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--border-color) 0%, rgba(217,212,202,0) 100%);
}

@media (max-width: 768px) {
  .entry-card::before,
  .entry-card::after {
    display: none;
  }
}

.entry-card:hover .card-content {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-content {
  background-color: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.card-header {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  align-items: center;
}

@media (max-width: 768px) {
  .card-header {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
}

.card-header.no-image {
  grid-template-columns: 1fr;
}

.card-image {
  width: 140px;
  height: 140px;
  background:
    linear-gradient(135deg, rgba(47, 111, 99, 0.06), rgba(154, 91, 31, 0.08)),
    var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  flex-shrink: 0;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--spacing-sm);
}

.card-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.entry-type {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: rgba(242, 240, 235, 0.88);
  border-radius: 999px;
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-sm);
}

.entry-type::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--support-color);
  border-radius: 50%;
}

.entry-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.entry-date {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.entry-location {
  font-size: var(--font-size-sm);
  color: var(--text-light);
  margin-bottom: 0;
}

.entry-summary {
  color: var(--text-secondary);
  line-height: var(--line-height-loose);
  margin-bottom: var(--spacing-md);
}

.entry-details {
  display: none;
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.entry-details.visible {
  display: block;
}

.entry-details > * + * {
  margin-top: var(--spacing-lg);
}

.entry-gallery {
  position: relative;
  margin-bottom: var(--spacing-lg);
  background-color: var(--bg-secondary);
  border-radius: 12px;
  overflow: hidden;
}

.gallery-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.gallery-slides {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  transition: transform 0.4s ease;
}

.gallery-slide {
  min-width: 100%;
  width: 100%;
  height: 100%;
}

.gallery-slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background-color: var(--bg-secondary);
}

.gallery-controls {
  position: absolute;
  bottom: var(--spacing-md);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--spacing-sm);
  z-index: 10;
}

.gallery-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
}

.gallery-dot.active {
  background-color: var(--surface);
  width: 24px;
  border-radius: 4px;
}

.gallery-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  background-color: rgba(31, 37, 35, 0.68);
  color: white;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.gallery-nav:hover {
  background-color: rgba(31, 37, 35, 0.82);
}

.gallery-prev {
  left: var(--spacing-md);
}

.gallery-next {
  right: var(--spacing-md);
}

.gallery-counter {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background-color: rgba(31, 37, 35, 0.72);
  color: white;
  padding: 0.35rem 0.75rem;
  border-radius: 20px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  z-index: 10;
}

.entry-description {
  color: var(--text-secondary);
  line-height: var(--line-height-loose);
  margin-bottom: var(--spacing-lg);
}

.card-footer {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: center;
  justify-content: space-between;
  margin-top: var(--spacing-lg);
}

.entry-details:not(.visible) + .card-footer {
  margin-top: 0;
}

.expand-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: var(--spacing-md);
  background: transparent;
  border: none;
  color: var(--accent-color);
  font-weight: 700;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.expand-button:hover {
  color: var(--accent-hover);
}

.expand-button svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
}

.file-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 38px;
  flex-shrink: 0;
  font-size: 0.62rem;
  font-weight: 700;
  line-height: 1;
  text-transform: uppercase;
  background: var(--surface);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.file-icon::after {
  content: '';
  position: absolute;
  top: -1px;
  right: -1px;
  width: 10px;
  height: 10px;
  background: linear-gradient(135deg, var(--bg-secondary) 50%, var(--border-color) 50%);
  border-left: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  border-top-right-radius: 4px;
}

.file-icon.pdf {
  color: #9f3f24;
}

.file-icon.doc {
  color: #2f6f63;
}

.file-icon.xls {
  color: #467a37;
}

.file-icon.img {
  color: #9a5b1f;
}

.file-icon.py,
.file-icon.txt {
  color: #344054;
}

/* Downloads Section */
.entry-downloads {
  background-color: rgba(242, 240, 235, 0.76);
  border-radius: 12px;
  padding: var(--spacing-lg);
  border: 1px solid var(--border-color);
}

.entry-downloads h4 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.downloads-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.preview-select {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  max-width: 100%;
  padding: 0.65rem 0.85rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-secondary);
  font: inherit;
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.preview-select:hover,
.preview-select.active {
  background-color: var(--surface);
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.preview-stack {
  margin-top: var(--spacing-md);
}

.preview-pane {
  display: none;
}

.preview-pane.active {
  display: block;
}

.preview-pane iframe {
  width: 100%;
  height: min(62vh, 560px);
  min-height: 320px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--surface);
}

.preview-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-sm);
}

/* External Links Section */
.entry-links-section {
  background-color: rgba(242, 240, 235, 0.76);
  border-radius: 12px;
  padding: var(--spacing-lg);
  border: 1px solid var(--border-color);
}

.entry-links-section h4 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.entry-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.entry-links .preview-select {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.entry-links .preview-select:hover,
.entry-links .preview-select.active {
  background-color: var(--support-color);
  color: white;
  border-color: var(--support-color);
  text-decoration: none;
  transform: translateY(-1px);
}

.entry-links .preview-select svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  flex-shrink: 0;
}

/* Tags */
.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: rgba(242, 240, 235, 0.78);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.tag:hover {
  border-color: var(--support-color);
  color: var(--support-color);
}

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



/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
  color: var(--text-light);
}

.empty-state p {
  font-size: var(--font-size-lg);
}

/* About Page Styles */
.about-hero {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
  margin-bottom: var(--spacing-3xl);
}

@media (max-width: 768px) {
  .about-hero {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

.about-image {
  width: 300px;
  height: 300px;
  background-color: var(--bg-secondary);
  border-radius: 8px;
  overflow: hidden;
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-text h1 {
  margin-bottom: var(--spacing-lg);
}

.about-text p {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-loose);
  color: var(--text-secondary);
}

/* Contact Section */
.contact-section {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: var(--spacing-2xl);
  margin-top: var(--spacing-3xl);
}

.contact-section h2 {
  margin-bottom: var(--spacing-lg);
}

.contact-form-embed {
  width: 100%;
  height: 600px;
  min-height: 500px;
  border: none;
  border-radius: 8px;
  overflow: auto;
}

/* Loading State */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  padding: var(--spacing-2xl);
  color: var(--text-light);
}

.loading::after {
  content: '';
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.contact-form-wrapper {
  border-radius: 8px;
  overflow: hidden;
  background-color: white;
  box-shadow: var(--shadow-sm);
}

.contact-section p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.about-content {
  max-width: 100%;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

/* Print Styles */
@media print {
  header {
    position: static;
  }

  .filters-sidebar {
    display: none;
  }

  .entry-card:hover .card-content {
    box-shadow: none;
    transform: none;
  }
}