/* ============================================================
   DR. GUPTA'S PLASTIC SURGERY INTELLIGENCE
   Design System — warm cream editorial
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,600&family=Cormorant:ital,wght@0,700;1,700&display=swap');
@import url('https://api.fontshare.com/v2/css?f[]=switzer@300,400,500&display=swap');

/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  /* Surfaces — warm cream palette from the brief */
  --color-bg:            #F5F0DC;
  --color-surface:       #F9F6E8;
  --color-surface-2:     #FDFAF0;
  --color-surface-offset:#EDE8D2;
  --color-divider:       #D9D2B8;
  --color-border:        #BBAF8A;

  /* Text */
  --color-text:          #1C1C1C;
  --color-text-muted:    #555547;
  --color-text-faint:    #888877;

  /* Accent — deep teal-green, clinical authority */
  --color-primary:       #2B6163;
  --color-primary-hover: #1D4547;

  /* Type */
  --font-display: 'Cormorant Garamond', 'Georgia', serif;
  --font-display-bold: 'Cormorant', 'Georgia', serif;
  --font-body:    'Switzer', 'Helvetica Neue', sans-serif;

  /* Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --content-narrow:  680px;
  --content-default: 1000px;
  --content-wide:    1240px;

  /* Other */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --shadow-sm: 0 1px 3px rgba(28,28,28,0.07);
  --shadow-md: 0 4px 16px rgba(28,28,28,0.09);
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme='dark'] {
  --color-bg:            #18160F;
  --color-surface:       #1E1B12;
  --color-surface-2:     #232017;
  --color-surface-offset:#151310;
  --color-divider:       #2E2B20;
  --color-border:        #3D3A2C;
  --color-text:          #E8E2C8;
  --color-text-muted:    #948E78;
  --color-text-faint:    #5A5648;
  --color-primary:       #6BAAAD;
  --color-primary-hover: #8EC4C7;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:            #18160F;
    --color-surface:       #1E1B12;
    --color-surface-2:     #232017;
    --color-surface-offset:#151310;
    --color-divider:       #2E2B20;
    --color-border:        #3D3A2C;
    --color-text:          #E8E2C8;
    --color-text-muted:    #948E78;
    --color-text-faint:    #5A5648;
    --color-primary:       #6BAAAD;
    --color-primary-hover: #8EC4C7;
  }
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 300;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color 0.3s, color 0.3s;
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'], ol[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }
button { cursor: pointer; background: none; border: none; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }

::selection {
  background: rgba(43, 97, 99, 0.18);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   SITE HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition), background-color 0.3s;
}
.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-8);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo-mark {
  width: 36px;
  height: 36px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.site-logo-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.site-logo-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--color-text);
  line-height: 1.1;
}

.site-logo-sub {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  line-height: 1;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.btn-theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition), background var(--transition);
}
.btn-theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* ============================================================
   PAGE LAYOUT
   ============================================================ */
.page-container {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-8);
}

/* ============================================================
   HOME — HERO MASTHEAD
   ============================================================ */
.home-masthead {
  padding: var(--space-20) 0 var(--space-12);
  border-bottom: 2px solid var(--color-text);
}

.masthead-eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}

.masthead-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
  line-height: 1.05;
  max-width: 14ch;
  margin-bottom: var(--space-6);
}

.masthead-desc {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--color-text-muted);
  max-width: 56ch;
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.masthead-meta {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.masthead-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.masthead-stat-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1;
}

.masthead-stat-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.masthead-divider {
  width: 1px;
  height: 36px;
  background: var(--color-divider);
  flex-shrink: 0;
}

/* ============================================================
   HOME — LATEST ISSUE FEATURE
   ============================================================ */
.section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-text);
  margin-bottom: var(--space-8);
  display: block;
}

.latest-feature {
  padding: var(--space-12) 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
  border-bottom: 1px solid var(--color-divider);
}

@media (max-width: 768px) {
  .latest-feature { grid-template-columns: 1fr; gap: var(--space-8); }
}

.feature-issue-tag {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.feature-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.1;
  margin-bottom: var(--space-5);
  letter-spacing: -0.01em;
}

.feature-title a {
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition);
}
.feature-title a:hover {
  border-color: var(--color-border);
}

.feature-summary {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-6);
}

.feature-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: 0.04em;
  transition: gap var(--transition), color var(--transition);
}
.feature-cta:hover {
  gap: var(--space-3);
  color: var(--color-primary-hover);
}
.feature-cta svg { flex-shrink: 0; }

.feature-toc {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-left: 3px solid var(--color-primary);
}

.feature-toc-heading {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}

.feature-toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.feature-toc-item {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--color-text-muted);
  line-height: 1.45;
}

.toc-number {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-faint);
  min-width: 20px;
  flex-shrink: 0;
}

/* ============================================================
   ARCHIVE GRID
   ============================================================ */
.archive-section {
  padding: var(--space-12) 0 var(--space-20);
}

.archive-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8) var(--space-6);
}

@media (max-width: 900px) {
  .archive-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .archive-grid { grid-template-columns: 1fr; }
}

.brief-card {
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-divider);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: opacity var(--transition);
}
.brief-card:hover { opacity: 0.8; }

.brief-card-date {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.brief-card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.2;
}

.brief-card-excerpt {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.brief-card-meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  border-top: 1px dashed var(--color-border);
}

.brief-card-count {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.brief-card-arrow {
  color: var(--color-primary);
  opacity: 0;
  transition: opacity var(--transition);
}
.brief-card:hover .brief-card-arrow { opacity: 1; }

/* ============================================================
   SITE FOOTER
   ============================================================ */
.site-footer {
  border-top: 2px solid var(--color-text);
  padding: var(--space-8) 0 var(--space-12);
}

.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-muted);
}

.footer-note {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 300;
  color: var(--color-text-faint);
  letter-spacing: 0.05em;
  text-align: right;
}

/* ============================================================
   BRIEF PAGE — INDIVIDUAL ISSUE
   ============================================================ */
.brief-masthead {
  padding: var(--space-16) 0 var(--space-10);
  border-bottom: 2px solid var(--color-text);
  margin-bottom: var(--space-10);
}

.brief-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-8);
  transition: color var(--transition), gap var(--transition);
}
.brief-back:hover { color: var(--color-primary); gap: var(--space-3); }

.brief-issue-number {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.brief-page-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-5);
}

.brief-page-meta {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.brief-page-date {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-muted);
}

.brief-page-stats {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
}

/* Brief page layout — two-column with TOC sidebar */
.brief-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-16);
  align-items: start;
  padding-bottom: var(--space-20);
}

@media (max-width: 860px) {
  .brief-layout { grid-template-columns: 1fr; }
}

/* Sidebar TOC */
.brief-sidebar {
  position: sticky;
  top: 80px;
}

.sidebar-toc {
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-top: 3px solid var(--color-primary);
}

.sidebar-toc-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}

.sidebar-toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-toc-link {
  display: block;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 300;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  line-height: 1.35;
  transition: background var(--transition), color var(--transition);
}
.sidebar-toc-link:hover,
.sidebar-toc-link.active {
  background: var(--color-surface-offset);
  color: var(--color-text);
}
.sidebar-toc-link.active {
  color: var(--color-primary);
}

/* Brief content sections */
.brief-content {}

.brief-section {
  padding-top: var(--space-10);
  margin-bottom: var(--space-2);
}

.brief-section-header {
  border-top: 2px solid var(--color-text);
  padding-top: var(--space-3);
  margin-bottom: var(--space-6);
}

.brief-section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-text);
}

.brief-article {
  padding-bottom: var(--space-6);
  margin-bottom: var(--space-6);
  border-bottom: 1px dashed var(--color-border);
}
.brief-article:last-child {
  border-bottom: none;
}

.article-kicker {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
}

.article-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: var(--space-3);
}

.article-title a {
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  transition: border-color var(--transition), color var(--transition);
}
.article-title a:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.article-summary {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-3);
  max-width: 70ch;
}

.article-meta {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.article-meta-dot {
  color: var(--color-border);
}

.article-meta-journal {
  font-style: italic;
}

/* Brief footer */
.brief-sources {
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 2px solid var(--color-text);
}

.brief-sources-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
}

.brief-sources-list {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 400;
  font-style: italic;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* Mobile adjustments */
@media (max-width: 600px) {
  .header-inner { padding: 0 var(--space-5); }
  .page-container { padding: 0 var(--space-5); }
  .home-masthead { padding: var(--space-12) 0 var(--space-8); }
  .masthead-title { font-size: var(--text-2xl); }
  .footer-inner { padding: 0 var(--space-5); flex-direction: column; gap: var(--space-3); }
  .footer-note { text-align: left; }
  .brief-layout { gap: var(--space-8); }
}