:root {
  /* Fonts */
  --font-heading: "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont,
    sans-serif;
  --font-body: "Work Sans", system-ui, -apple-system, BlinkMacSystemFont,
    sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas,
    monospace;

  /* Colors - Core */
  --color-bg-body: #fafbfc;
  --color-bg-content: #ffffff;
  --color-bg-navbar: #ffffff;
  --color-text-primary: #4a4f5c;
  --color-text-heading: #2a2e38;
  --color-text-muted: #8892a0;

  /* Colors - Accents */
  --color-accent: #5b6ee8;
  --color-accent-hover: #4655c9;
  --color-accent-soft: #eef0fd;
  --color-warm: #e8a33d;
  --color-warm-soft: #fdf1dd;

  /* Colors - Nav */
  --color-nav-link: #6a7080;
  --color-nav-link-hover: #2a2e38;
  --color-link-hover: #5b6ee8;

  /* Colors - Borders */
  --color-border: #eaecf1;
  --color-border-light: #f0f1f5;

  /* Status */
  --color-success: #3aa876;
  --color-danger: #d9726f;

  /* Spacing */
  --spacing-xl: 5rem;

  /* Sizing */
  --article-img-size: 4rem; /* 64px converted to rem */
  --account-img-size: 7.813rem; /* 125px converted to rem */
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
}

/* Base Styles */
body {
  font-family: var(--font-body);
  background: var(--color-bg-body);
  color: var(--color-text-primary);
  font-size: 1.02rem;
  line-height: 1.65;
}

main {
  padding-top: calc(var(--spacing-xl) + 0.5rem);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  color: var(--color-text-heading);
  letter-spacing: -0.01em;
}

.navbar-brand {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text-heading) !important;
  font-size: 1.3rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.navbar-brand::before {
  content: "";
  display: inline-block;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent), #8a7bf0);
  box-shadow: 0 0 0 4px var(--color-accent-soft);
}

a {
  text-decoration: none;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Headers and Navigation */
.bg-steel {
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 4px 24px rgba(20, 23, 31, 0.05);
  padding-top: 0.35rem;
  padding-bottom: 0.35rem;
}

.site-header .navbar-nav .nav-link {
  color: var(--color-nav-link);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0.9rem !important;
  border-radius: 999px;
  transition: color 0.2s ease-in-out, background-color 0.2s ease-in-out;
}

.site-header .navbar-nav .nav-link:hover,
.site-header .navbar-nav .nav-link:focus {
  color: var(--color-nav-link-hover);
  background-color: var(--color-accent-soft);
}

.site-header .navbar-nav .nav-link.active {
  font-weight: 700;
  color: var(--color-accent);
  background-color: var(--color-accent-soft);
}

.site-header .btn-outline-light {
  --bs-btn-color: var(--color-text-heading);
  --bs-btn-border-color: var(--color-border);
  --bs-btn-hover-color: var(--color-text-heading);
  --bs-btn-hover-bg: var(--color-bg-body);
  --bs-btn-hover-border-color: var(--color-border);
  --bs-btn-active-color: var(--color-text-heading);
  --bs-btn-active-bg: var(--color-bg-body);
  --bs-btn-active-border-color: var(--color-border);
  border-radius: 999px;
  font-weight: 600;
  padding-left: 1.1rem;
  padding-right: 1.1rem;
}

.site-header .btn-light {
  --bs-btn-color: #ffffff;
  --bs-btn-bg: var(--color-accent);
  --bs-btn-border-color: var(--color-accent);
  --bs-btn-hover-color: #ffffff;
  --bs-btn-hover-bg: var(--color-accent-hover);
  --bs-btn-hover-border-color: var(--color-accent-hover);
  --bs-btn-active-color: #ffffff;
  --bs-btn-active-bg: var(--color-accent-hover);
  --bs-btn-active-border-color: var(--color-accent-hover);
  border-radius: 999px;
  font-weight: 600;
  padding-left: 1.1rem;
  padding-right: 1.1rem;
  box-shadow: 0 4px 14px rgba(91, 110, 232, 0.28);
  transition: box-shadow 0.2s ease, transform 0.15s ease, background-color 0.2s ease;
}

.site-header .btn-light:hover {
  box-shadow: 0 6px 18px rgba(91, 110, 232, 0.36);
  transform: translateY(-1px);
}

.site-header .navbar-toggler {
  border-color: var(--color-border);
}

.site-header #bd-theme {
  border-radius: 999px;
  padding: 0.5rem 0.9rem !important;
}

/* Content Sections */
.content-section {
  background: var(--color-bg-content);
  border: 1px solid var(--color-border);
  border-left: 3px solid transparent;
  border-radius: var(--radius-md);
  box-shadow: 0 1px 2px rgba(20, 23, 31, 0.04);
  transition: box-shadow 0.2s ease, transform 0.2s ease,
    border-color 0.2s ease;
}

article.content-section:hover {
  box-shadow: 0 8px 20px rgba(20, 23, 31, 0.08);
  border-color: var(--color-border-light);
  border-left-color: var(--color-accent);
  transform: translateY(-2px);
}

/* Articles */
.article-title {
  color: var(--color-text-heading);
  font-weight: 600;
  transition: color 0.2s ease-in-out;
}

a.article-title:hover,
a.article-title:focus {
  color: var(--color-accent);
  text-decoration: none;
}

.article-content {
  white-space: pre-line;
  font-size: 1.15rem;
  color: var(--color-text-primary);
}

.article-img {
  height: var(--article-img-size);
  width: var(--article-img-size);
  flex-shrink: 0;
  object-fit: cover;
  border: 2px solid var(--color-bg-content);
  box-shadow: 0 0 0 2px var(--color-accent-soft);
}

.article-metadata {
  padding-bottom: 0.5rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border-light);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-metadata::before {
  content: "\25CF"; /* commit dot */
  color: var(--color-accent);
  font-size: 0.6rem;
}

.article-metadata a {
  color: var(--color-text-heading);
  font-weight: 600;
  transition: color 0.2s ease-in-out;
}

.article-metadata a:hover,
.article-metadata a:focus {
  color: var(--color-accent);
  text-decoration: none;
}

.article-svg {
  width: 1.563rem; /* 25px converted to rem */
  height: 1.563rem;
  vertical-align: middle;
}

/* Account/Profile */
.account-img {
  height: var(--account-img-size);
  width: var(--account-img-size);
  object-fit: cover;
  border: 3px solid var(--color-bg-content);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.account-heading {
  font-size: 2.5rem;
  font-weight: 700;
}

.file-input-sm {
  max-width: 300px;
}

/* Sidebar */
aside h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

aside .list-group-item {
  border: none;
  border-bottom: 1px solid var(--color-border-light);
  background: transparent;
  padding-left: 0;
  font-size: 0.95rem;
}

aside .list-group-item:last-child {
  border-bottom: none;
}

/* Custom Button Colors - Light Mode */
.btn-outline-primary {
  --bs-btn-color: var(--color-accent);
  --bs-btn-border-color: var(--color-accent);
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: var(--color-accent);
  --bs-btn-hover-border-color: var(--color-accent-hover);
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: var(--color-accent-hover);
  --bs-btn-active-border-color: var(--color-accent-hover);
}

.btn-outline-secondary {
  --bs-btn-color: #495057;
  --bs-btn-border-color: #6c757d;
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #5a6268;
  --bs-btn-hover-border-color: #545b62;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #545b62;
  --bs-btn-active-border-color: #4e555b;
}

.btn-outline-danger {
  --bs-btn-color: var(--color-danger);
  --bs-btn-border-color: var(--color-danger);
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: var(--color-danger);
  --bs-btn-hover-border-color: #a8433f;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #a8433f;
  --bs-btn-active-border-color: #983b38;
}

.btn-primary {
  --bs-btn-color: #fff;
  --bs-btn-bg: var(--color-accent);
  --bs-btn-border-color: var(--color-accent);
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: var(--color-accent-hover);
  --bs-btn-hover-border-color: var(--color-accent-hover);
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #223585;
  --bs-btn-active-border-color: #223585;
}

.btn-danger {
  --bs-btn-color: #fff;
  --bs-btn-bg: var(--color-danger);
  --bs-btn-border-color: var(--color-danger);
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #a8433f;
  --bs-btn-hover-border-color: #983b38;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #983b38;
  --bs-btn-active-border-color: #883432;
}

.btn {
  border-radius: 0.5rem;
  font-weight: 600;
  transition: transform 0.15s ease, box-shadow 0.15s ease,
    background-color 0.15s ease, border-color 0.15s ease;
}

.btn-primary:hover {
  box-shadow: 0 4px 12px rgba(52, 84, 209, 0.3);
}

/* Custom Button Colors - Dark Mode */
[data-bs-theme="dark"] .btn-outline-primary {
  --bs-btn-color: #8ea0f0;
  --bs-btn-border-color: #8ea0f0;
  --bs-btn-hover-color: #0e1016;
  --bs-btn-hover-bg: #8ea0f0;
  --bs-btn-hover-border-color: #a3b3f4;
  --bs-btn-active-color: #0e1016;
  --bs-btn-active-bg: #a3b3f4;
  --bs-btn-active-border-color: #b8c5f7;
}

[data-bs-theme="dark"] .btn-outline-secondary {
  --bs-btn-color: #b8bfc6;
  --bs-btn-border-color: #8a939b;
  --bs-btn-hover-color: #000;
  --bs-btn-hover-bg: #b8bfc6;
  --bs-btn-hover-border-color: #adb5bd;
  --bs-btn-active-color: #000;
  --bs-btn-active-bg: #adb5bd;
  --bs-btn-active-border-color: #a2aab2;
}

[data-bs-theme="dark"] .btn-outline-danger {
  --bs-btn-color: #e29a97;
  --bs-btn-border-color: #e29a97;
  --bs-btn-hover-color: #0e1016;
  --bs-btn-hover-bg: #e29a97;
  --bs-btn-hover-border-color: #e8aeab;
  --bs-btn-active-color: #0e1016;
  --bs-btn-active-bg: #e8aeab;
  --bs-btn-active-border-color: #edc2c0;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .account-heading {
    font-size: 2rem;
  }

  .article-img {
    height: 3rem;
    width: 3rem;
  }
}

/* Dark Mode Features */

[data-bs-theme="dark"] {
  --color-bg-body: #0f1117;
  --color-bg-content: #181b24;
  --color-text-primary: #d8dae2;
  --color-text-heading: #f2f3f7;
  --color-text-muted: #8992a8;
  --color-border: #2a2e3a;
  --color-border-light: #333748;
  --color-accent-soft: #1f2745;
  --color-warm-soft: #2e2515;
}

[data-bs-theme="dark"] .content-section {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

[data-bs-theme="dark"] article.content-section:hover {
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.5);
}

[data-bs-theme="dark"] {
  --color-bg-navbar: #181b24;
  --color-nav-link: #9298a8;
  --color-nav-link-hover: #f2f3f7;
}

[data-bs-theme="dark"] .bg-steel {
  background-color: rgba(24, 27, 36, 0.85);
  border-bottom: 1px solid var(--color-border);
  box-shadow: none;
}

/* Custom Modal Colors */
.modal-header.bg-success {
  background-color: var(--color-success) !important;
}

.modal-header.bg-danger {
  background-color: var(--color-danger) !important;
}

/* Ensure modal header text stays white in both themes */
.modal-header.bg-success .modal-title,
.modal-header.bg-danger .modal-title {
  color: #ffffff !important;
}

.modal-content {
  border-radius: var(--radius-lg);
  border: none;
}

/* Keep Bootstrap's semantic text/border utilities aligned with the palette */
.text-danger {
  color: var(--color-danger) !important;
}

.border-top {
  border-color: var(--color-border-light) !important;
}