/* === ROOT VARIABLES === */
:root {
  /* Color Palette */
  --clr-primary: #00796b;
  --clr-primary-dark: #00564d;
  --clr-secondary: #0288d1;
  --clr-secondary-dark: #01579b;
  --clr-accent: #ffc107;
  --clr-accent-hover: #ffb300;
  --clr-light: #f8f9fa;
  --clr-dark: #232834;
  --clr-medium: #6c757d;
  --clr-white: #fff;
  --clr-bg-main: #181c23;
  --clr-bg-section: #232834;
  --clr-bg-card: #232834;
  --clr-bg-hero: #10131a;
  --clr-bg-download: #232834;
  --clr-text-main: #f3f6fa;
  --clr-text-secondary: #bfc7d5;
  --clr-border-dark: #232834;
  --clr-border-light: #eeeeee;
  --focus-outline: 2px solid var(--clr-accent);
  --border-radius: 8px;
  --transition-speed: 0.25s;

  /* Fonts */
  --font-primary: 'Poppins', sans-serif;
  --font-size-base: 1rem;
  --font-size-lg: 1.2rem;

  /* Spacing & Radius */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2.5rem;
  --spacing-xxl: 4rem;
}

/* === GLOBAL STYLES === */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Add padding to the top of the scroll container to offset the fixed header */
html {
  scroll-padding-top: 70px; /* Adjust this value to match your fixed header's height */
  scroll-behavior: smooth; /* Optional: Adds smooth scrolling effect */
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  color: var(--clr-text-main);
  background: var(--clr-bg-main);
  min-height: 100vh;
  line-height: 1.7;
  letter-spacing: 0.01em;
}

/* --- Container --- */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  background: var(--clr-bg-section);
  border-radius: var(--border-radius);
  border: 1px solid var(--clr-border-dark);
}

/* --- Unified, Oval, Beautiful Action Buttons --- */
.btn, button, input[type="submit"] {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-xl);
  border: 2px solid transparent;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition-speed), color var(--transition-speed), border-color var(--transition-speed), box-shadow 0.2s;
  text-align: center;
  font-size: 1rem;
  letter-spacing: 0.02em;
  background: var(--clr-primary);
  color: var(--clr-white);
  box-shadow: 0 2px 12px #0001;
  margin: 0.25em 0.5em 0.25em 0;
  min-width: 120px;
}

.btn--primary, .btn.btn--primary,
.download-button, .btn--pdf-action {
  background: var(--clr-primary);
  color: var(--clr-white);
  border: 2px solid transparent;
}

.btn--primary:hover, .btn--primary:focus,
.download-button:hover, .download-button:focus,
.btn--pdf-action:hover, .btn--pdf-action:focus {
  background: var(--clr-primary-dark);
  color: var(--clr-accent);
  border-color: var(--clr-accent);
  box-shadow: 0 6px 24px #0003;
  outline: var(--focus-outline);
  outline-offset: 2px;
}

.btn--secondary, .btn.btn--secondary {
  background: transparent;
  color: var(--clr-accent);
  border: 2px solid var(--clr-accent);
}

.btn--secondary:hover, .btn--secondary:focus {
  background: var(--clr-accent);
  color: var(--clr-bg-main);
}

.item-list__actions, .download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
  align-items: center;
  margin-top: 0.25em;
  margin-bottom: 0.25em;
}

/* Make sure buttons are always in a row unless on very small screens */
@media (max-width: 600px) {
  .item-list__actions, .download-actions {
    flex-direction: column;
    gap: 0.4em;
    align-items: stretch;
  }
  .btn, button, input[type="submit"] {
    min-width: 90px;
    font-size: 0.98rem;
    padding: var(--spacing-xs) var(--spacing-md);
  }
}

/* --- Card Grid --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}
.card {
  background: var(--clr-bg-card);
  color: var(--clr-text-main);
  border-radius: var(--border-radius);
  border: 1px solid var(--clr-border-dark);
  transition: transform 0.18s, box-shadow 0.18s, background 0.18s;
  overflow: hidden;
  text-decoration: none;
  display: flex;
  flex-direction: column;
}
.card:hover {
  background: #232f3e;
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 32px #0003;
}
.card__icon.number-icon {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--clr-primary);
  color: var(--clr-white);
  font-size: 2rem;
  font-weight: bold;
  border-radius: 50%;
  width: 3.2rem;
  height: 3.2rem;
  margin: 1.2rem auto 0.5rem auto;
}
.card__body {
  padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-lg) var(--spacing-lg);
  text-align: center;
  flex-grow: 1;
}
.card__title {
  color: var(--clr-accent);
  font-size: 1.15em;
  font-weight: 600;
}
.card__desc {
  color: var(--clr-text-secondary);
  font-size: 0.97rem;
  line-height: 1.6;
}

/* --- Download/Item List --- */
.item-list, .download-list {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin: 0;
}
.item-list__item, .download-item {
  background-color: var(--clr-bg-card);
  border: 1px solid var(--clr-border-dark);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  transition: box-shadow var(--transition-speed) ease, border-left-color var(--transition-speed) ease;
}
.item-list__item:hover, .download-item:hover {
  box-shadow: 0 6px 15px rgba(0,0,0,0.18);
  border-left: 4px solid var(--clr-primary);
}
.item-list__title, .item-title {
  font-weight: 600;
  color: var(--clr-accent);
  flex-grow: 1;
  margin-right: var(--spacing-md);
  word-break: break-word;
}
.file-meta {
  color: var(--clr-text-secondary);
  font-size: 0.97em;
  margin-left: 0.75em;
  display: inline-block;
  vertical-align: middle;
  white-space: nowrap;
}
.download-icon {
  margin-left: 0.5em;
  display: inline-flex;
  align-items: center;
  color: var(--clr-accent);
  font-size: 1.2em;
}
.download-list a, .item-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--clr-bg-card);
  color: var(--clr-text-main);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: background-color var(--transition-speed), color var(--transition-speed), box-shadow var(--transition-speed);
  font-size: 1.08rem;
  font-family: var(--font-primary);
  font-weight: 500;
  min-height: 48px;
  border: 1px solid var(--clr-border-dark);
}
.download-list a:hover, .item-list a:hover,
.download-list a:focus, .item-list a:focus {
  background-color: var(--clr-primary-dark);
  color: var(--clr-white);
}

/* --- Search --- */
.search-section {
  margin-bottom: 1.5rem;
  text-align: center;
}
#search-input {
  width: 100%;
  max-width: 400px;
  padding: 0.8rem;
  border: 1px solid var(--clr-border-light);
  border-radius: var(--border-radius);
  font-size: 1rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: border-color 0.2s, box-shadow 0.2s;
  margin-bottom: 0.5rem;
}
#search-input:focus {
  border-color: var(--clr-accent-hover);
  box-shadow: 0 0 5px rgba(0, 200, 150, 0.5);
  outline: none;
}
#search-input::placeholder {
  color: var(--clr-medium);
  font-style: italic;
}
#no-results-message {
  font-size: 1rem;
  margin-top: 1rem;
  color: var(--clr-medium);
}

/* --- Messages --- */
.message {
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin: var(--spacing-md) auto;
  max-width: 600px;
  text-align: center;
  font-size: 1rem;
  background: #232834;
  color: var(--clr-text-main);
}
.message--info {
  border: 1px solid var(--clr-accent);
  color: var(--clr-accent);
}
.message--error {
  border: 1px solid #c62828;
  color: #ff6b6b;
}

/* --- Breadcrumb --- */
.breadcrumb {
  background-color: #232834;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
}
.breadcrumb a { color: var(--clr-accent); }
.breadcrumb span { color: var(--clr-text-secondary); }

/* --- Section Titles --- */
.section-title, .page-header h1, .page-title-section h2 {
  color: var(--clr-accent);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.04em;
}
.section-subtitle, .page-header .subtitle, .quick-access-subtitle {
  color: var(--clr-text-secondary);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .container { padding: 0 var(--spacing-sm); }
  .card-grid { grid-template-columns: 1fr; }
  .section-title { font-size: 1.4rem; }
  .section-subtitle { font-size: 1rem; }
  .item-list__item, .download-item {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-sm) var(--spacing-md);
  }
  .btn, button, input[type="submit"] {
    font-size: 0.95rem;
    padding: var(--spacing-sm) var(--spacing-md);
  }
  #search-input { max-width: 100%; }
}

/* --- Utility --- */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}
.focusable:active,
.focusable:focus {
  position: static !important;
  width: auto !important;
  height: auto !important;
  margin: 0 !important;
  overflow: visible !important;
  clip: auto !important;
  white-space: normal !important;
  background: var(--clr-accent);
  color: var(--clr-dark);
  padding: 0.5em 1em;
  z-index: 10000;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 8px #0002;
}
.skip-link {
  left: 0;
  top: 0;
  position: absolute;
}
a:focus-visible, button:focus-visible, .btn:focus-visible, input:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px #ffc10733;
  z-index: 2;
}
.btn:hover, .btn:focus {
  filter: brightness(1.08);
  box-shadow: 0 4px 16px rgba(0,0,0,0.13);
}
html[lang] { font-family: var(--font-primary); }

/* === DOWNLOADS PAGE === */
.downloads-page {
  padding: var(--dl-padding-page);
  max-width: 900px;
  margin: 0 auto;
}

.download-section {
  margin-bottom: var(--dl-margin-bottom-section);
  background: var(--clr-bg-download);
  border-radius: var(--dl-border-radius-section);
  padding: var(--dl-padding-section);
  border: 1px solid var(--clr-border-dark);
  /* Remove box-shadow for a flatter look, inspired by old design */
}

.download-section h2 {
  color: var(--clr-accent);
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: var(--dl-margin-bottom-heading);
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--dl-heading-border-color);
  text-align: left;
  letter-spacing: 0.01em;
}

.download-list {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: var(--dl-gap-list);
  margin: 0;
}

.download-list li {
  display: block;
  margin-bottom: 0.5rem;
  border-radius: var(--dl-border-radius-link);
  transition: transform 0.2s, box-shadow 0.2s;
}

.download-list li:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.10);
}

.download-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--clr-bg-card);
  color: var(--clr-text-main);
  padding: var(--dl-padding-link);
  border-radius: var(--dl-border-radius-link);
  text-decoration: none;
  transition: background-color var(--transition-speed), transform var(--transition-speed), box-shadow var(--transition-speed);
  text-align: left;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--clr-border-dark);
  font-size: 1.08rem;
  font-family: var(--font-primary);
  letter-spacing: 0.01em;
  font-weight: 500;
  min-height: 48px;
}
.download-list .download-icon {
  margin-left: 0.5em;
  color: var(--clr-accent);
  font-size: 1.2em;
  vertical-align: middle;
  flex-shrink: 0;
  user-select: none;
  pointer-events: none;
}

.download-list .download-icon svg {
  transition: transform 0.18s;
}
.download-list a:hover .download-icon svg,
.download-list a:focus .download-icon svg {
  transform: scale(1.12) translateY(1px);
}

.download-list .item-title {
  font-weight: 600;
  color: var(--clr-accent);
  flex: 1 1 auto;
  margin-right: 1em;
  letter-spacing: 0.01em;
  font-size: 1.08em;
  word-break: break-word;
}

.download-list .file-meta {
  font-size: 0.97em;
  color: var(--clr-text-secondary);
  margin-left: 0.75em;
  display: inline-block;
  vertical-align: middle;
  white-space: nowrap;
  word-break: break-word;
}

.page-header {
  background: var(--clr-bg-section);
  padding: var(--spacing-lg) 0;
  text-align: center;
  border-bottom: 1px solid #232834;
  margin-bottom: var(--spacing-xl);
  border-radius: var(--border-radius);
}
.page-header h1,
.page-header .subtitle {
  color: var(--clr-text-main);
}

/* Quick access section: dark background */
.section--quick-access {
  background: var(--clr-bg-section);
  padding: var(--spacing-xl) 0;
}

/* Card content */
.card__title {
  color: var(--clr-accent);
}
.card__desc {
  color: var(--clr-text-secondary);
}

/* Item list: dark background */
.item-list__item {
  background-color: var(--clr-bg-card);
  border: 1px solid #232834;
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  transition: box-shadow var(--transition-speed) ease, border-left-color var(--transition-speed) ease;
  border-left: 4px solid transparent;
}
.item-list__item:hover {
  box-shadow: 0 6px 15px rgba(0,0,0,0.18);
  border-left-color: var(--clr-primary);
}
.item-list__title {
  font-weight: 600;
  color: var(--clr-accent);
  flex-grow: 1;
  margin-right: var(--spacing-md);
  word-break: break-word;
}

/* Download button in lists */
.item-list .download-button {
  background-color: var(--clr-primary);
  color: var(--clr-white);
  border-color: var(--clr-accent);
}
.item-list .download-button:hover {
  background-color: var(--clr-primary-dark);
  border-color: var(--clr-primary-dark);
  color: var(--clr-white);
}

/* Download list links: dark background */
.download-list a {
  background-color: var(--clr-bg-card);
  color: var(--clr-text-main);
}
.download-list a:hover,
.download-list a:focus {
  background-color: var(--clr-primary-dark);
  color: var(--clr-white);
}

/* File meta: lighter text */
.file-meta {
  color: var(--clr-text-secondary);
}

/* Messages: dark background, colored border */
.message {
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin: var(--spacing-md) auto;
  max-width: 600px;
  text-align: center;
  font-size: 1rem;
  background: #232834;
  color: var(--clr-text-main);
}
.message--info {
  border: 1px solid var(--clr-accent);
  background: #232834;
  color: var(--clr-accent);
}
.message--error {
  border: 1px solid #c62828;
  background: #232834;
  color: #ff6b6b;
}

/* === BACK BUTTON SECTION === */
.back-button-container {
  text-align: center;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}
/* Back button uses .btn and .btn--secondary */
/* Ensure secondary button styles outside hero are correct */
.back-button-container .btn--secondary {
  color: var(--clr-accent);
  border-color: var(--clr-accent);
}
.back-button-container .btn--secondary:hover {
  background-color: var(--clr-accent);
  color: var(--clr-bg-main);
}


/* Scroll Progress Bar */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 4px;
  background-color: var(--clr-accent);
  z-index: 1000;
  transition: width 0.2s ease;
}

/* === QUICK ACCESS ACTIONS === */
.quick-access-actions {
  text-align: center;
  margin-top: var(--spacing-lg);
}

/* Added class for margin previously inline */
.quick-access-actions--margin-top {
    margin-top: var(--spacing-xl); /* 2.5rem */
}

.quick-access-actions .btn {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1rem;
}

/* === BREADCRUMB NAVIGATION === */
.breadcrumb {
  background-color: #232834;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
}
.breadcrumb a {
  color: var(--clr-accent);
}
.breadcrumb span {
  color: var(--clr-text-secondary);
}

/* === LOADING SPINNER === */
.loading-spinner {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 50px;
  height: 50px;
  border: 5px solid var(--clr-light);
  border-top: 5px solid var(--clr-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  z-index: 1000;
}

@keyframes spin {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  100% {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

/* === SEARCH FORM === */
.search-form {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.search-form input {
  padding: var(--spacing-sm);
  border: 1px solid var(--clr-border-light);
  border-radius: var(--border-radius);
  font-size: 1rem;
  width: 250px;
}

.search-form button {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 1rem;
}

/* === SEARCH SECTION === */
.search-section {
  margin-bottom: 1.5rem;
  text-align: center;
}

#search-input {
  width: 100%;
  max-width: 400px;
  padding: 0.8rem;
  border: 1px solid var(--clr-border-light);
  border-radius: var(--border-radius);
  font-size: 1rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

#search-input:focus {
  border-color: var(--clr-accent-hover);
  box-shadow: 0 0 5px rgba(0, 200, 150, 0.5);
  outline: none;
}

#search-input::placeholder {
  color: var(--clr-medium);
  font-style: italic;
}

/* Search bar for notes */
#notes-search-section {
  margin-bottom: 1.5rem;
  text-align: center;
}
#notes-search-input {
  width: 100%;
  max-width: 400px;
  padding: 0.8rem;
  border: 1px solid var(--clr-border-light);
  border-radius: var(--border-radius);
  font-size: 1rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: border-color 0.2s, box-shadow 0.2s;
  margin-bottom: 0.5rem;
}
#notes-search-input:focus {
  border-color: var(--clr-accent-hover);
  box-shadow: 0 0 5px rgba(0, 200, 150, 0.5);
  outline: none;
}
#notes-no-results-message {
  font-size: 1rem;
  margin-top: 1rem;
  color: var(--clr-medium);
  display: none;
}

/* === BACK TO TOP BUTTON === */
.back-to-top {
  text-align: center;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.back-to-top .btn {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 1rem;
  background-color: var(--clr-primary);
  color: var(--clr-white);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color var(--transition-speed), transform var(--transition-speed);
}

.back-to-top .btn:hover {
  background-color: var(--clr-primary-dark);
  transform: translateY(-2px);
}

.back-to-top .btn:active {
  transform: translateY(0);
}

/* === RESPONSIVENESS === */
@media (max-width: 768px) {
  .section {
    padding: var(--spacing-xl) 0;
  }

  .hero-title {
    font-size: 2.2rem;
  }
  .hero-subtitle {
    font-size: 1.1rem;
  }

  .hero-actions {
      flex-direction: column;
      align-items: center;
      gap: var(--spacing-md); /* Add gap for vertical spacing */
  }
  .hero-actions .btn {
      width: 80%;
      max-width: 300px;
      /* No individual margins needed if using gap */
  }

  /* Adjust item list for mobile */
  .item-list__item {
      flex-direction: column; /* Stack title and button vertically */
      align-items: flex-start; /* Align items to the start */
      border-left-width: 0; /* Remove left border hover effect on mobile? */
      padding: var(--spacing-sm) var(--spacing-md); /* Reduce padding */
  }

  .page-header h1 {
      font-size: 1.6rem; /* Smaller page titles */
  }

  .card-grid {
      grid-template-columns: 1fr;
  }

  .btn--lg {
      font-size: 1rem;
      padding: var(--spacing-sm) var(--spacing-lg);
  }

  .container {
      padding-right: var(--spacing-sm);
      padding-left: var(--spacing-sm);
  }

  .downloads-page {
    padding: var(--spacing-md);
  }

  .download-section {
    padding: var(--spacing-sm);
  }

  .download-list a {
    text-align: left;
    padding: var(--spacing-sm);
  }

  #search-input {
    max-width: 100%; /* Ensure it fits smaller screens */
  }
}

/* === FILE ICON === */
.file-icon {
  width: 24px;
  height: 24px;
  margin-right: var(--spacing-sm);
  vertical-align: middle;
}

/* 404 Page Styles */
.error-page {
  background: var(--clr-bg-section);
  border-radius: var(--border-radius);
  text-align: center;
  padding: var(--spacing-xxl) var(--spacing-md);
}

.error-title {
  font-size: 6rem;
  font-weight: bold;
  color: var(--clr-primary-dark);
  margin-bottom: var(--spacing-md);
}

.error-message {
  font-size: 1.5rem;
  color: var(--clr-medium);
  margin-bottom: var(--spacing-sm);
}

.error-suggestion {
  font-size: 1rem;
  color: var(--clr-dark);
  margin-bottom: var(--spacing-lg);
}

.error-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}
  margin-bottom: 1rem;
  font-size: 1rem;
  line-height: 1.5;
}

.section-divider {
  border: 0;
  border-top: 1px solid var(--clr-border-dark);
  margin: 2.5rem 0 2rem 0;
}

/* Remove duplicate .visually-hidden, .focusable, .skip-link if present here */