/* ══════════════════════════════════════════════════════════════
   SHARED STYLES — The Discount Philosophy
   All pages link to this file. Page-specific overrides live in
   each HTML file's <style> tag (loaded after this stylesheet).
   ══════════════════════════════════════════════════════════════ */

/* ── RESET & BASE ── */
* { margin: 0; padding: 0; box-sizing: border-box; }
img { max-width: 100%; height: auto; }
html { scroll-behavior: smooth; scroll-padding-top: 2rem; font-size: 16px; }

body {
  background: var(--cream);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── VARIABLES ── */
:root {
  --cream: #F8F5EF;
  --paper: #FFFDF7;
  --ink: #1A1A18;
  --ink-light: #4A4A42;
  --ink-faint: #8A8A7E;
  --rule: #DDD8CC;
  --accent: #2A5A7A;
  --accent-glow: rgba(42,90,122,0.08);
  --serif: 'Instrument Serif', Georgia, serif;
  --sans: 'DM Sans', system-ui, sans-serif;
  --mono: 'JetBrains Mono', monospace;
}

/* ── SITE NAV ── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.site-nav.scrolled {
  background: rgba(17,17,16,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: rgba(255,255,255,0.06);
}

.site-nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
  padding: 0 2rem;
}

.site-nav-left {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

.site-nav-up {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(242,237,228,0.35);
  text-decoration: none;
  padding: 0.3rem 0.5rem;
  border: 1px solid rgba(242,237,228,0.1);
  border-radius: 3px;
  transition: all 0.2s;
  white-space: nowrap;
}

.site-nav-up:hover {
  color: rgba(242,237,228,0.7);
  border-color: rgba(242,237,228,0.2);
}

.site-nav-sep {
  color: rgba(242,237,228,0.15);
  font-size: 0.8rem;
  font-weight: 300;
}

.site-nav-brand {
  font-family: var(--serif);
  font-size: 0.85rem;
  font-weight: 400;
  color: rgba(242,237,228,0.6);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s;
}

.site-nav-brand:hover {
  color: rgba(242,237,228,0.9);
}

.site-nav-links {
  display: flex;
  gap: 0.3rem;
}

.site-nav-links a {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(242,237,228,0.4);
  text-decoration: none;
  padding: 0.35rem 0.7rem;
  border-radius: 3px;
  transition: all 0.2s;
  white-space: nowrap;
}

.site-nav-links a:hover {
  color: rgba(242,237,228,0.8);
}

.site-nav-links a.active {
  color: rgba(242,237,228,0.9);
  background: rgba(242,237,228,0.08);
}

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 6rem 2rem;
  position: relative;
  background: #111110;
  color: #F2EDE4;
  overflow: hidden;
}

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  opacity: 0.4;
  margin-bottom: 3rem;
  position: relative;
  z-index: 1;
}

.hero-number {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.4;
  margin-bottom: 3rem;
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.hero h1 em {
  font-style: italic;
  display: block;
  font-size: 0.6em;
  line-height: 1.3;
  margin-top: 0.3em;
  letter-spacing: 0;
}

.hero-sub {
  font-size: 1.05rem;
  font-weight: 300;
  opacity: 0.6;
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 3rem;
  position: relative;
  z-index: 1;
}

.hero-author {
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.5;
  margin-bottom: 4rem;
  position: relative;
  z-index: 1;
}

.hero-cover {
  max-height: 200px;
  max-width: 100%;
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
  border-radius: 2px;
  margin: 2rem 0;
  position: relative;
  z-index: 1;
  transition: transform 0.3s ease;
}

.hero-cover:hover {
  transform: rotate(0deg) scale(1.03);
}

.hero-books {
  display: flex;
  align-items: center;
  gap: 0;
  position: relative;
  z-index: 1;
  margin-bottom: 1rem;
}

.hero-book-cover {
  max-height: 150px;
  max-width: 100%;
  box-shadow: 0 8px 30px rgba(0,0,0,0.35);
  border-radius: 2px;
  transition: transform 0.3s ease;
}

.hero-prepared {
  position: relative;
  z-index: 1;
  margin-top: 2rem;
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.35;
}

.hero-prepared a {
  color: inherit;
  text-decoration: none;
}

.hero-prepared a:hover {
  opacity: 0.8;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.hero-back {
  position: absolute;
  top: 2rem;
  left: 2rem;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #F2EDE4;
  opacity: 0.4;
  text-decoration: none;
  z-index: 2;
  transition: opacity 0.2s;
}

.hero-back:hover { opacity: 0.7; }

.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0.3;
  animation: pulse 2s ease-in-out infinite;
}

.hero-scroll span {
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-family: var(--mono);
}

.hero-scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, #F2EDE4, transparent);
}

@keyframes pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.6; }
}

.hero-accent-line {
  width: 40px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin: 1.5rem 0;
  position: relative;
  z-index: 1;
}

/* ── SECTIONS ── */
.section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--rule);
}

.section:last-of-type { border-bottom: none; }

.section-eyebrow {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
}

.section-lead {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--ink-light);
  line-height: 1.75;
  margin-bottom: 2.5rem;
  max-width: 700px;
}

.section-prose {
  font-size: 0.95rem;
  font-weight: 300;
  color: var(--ink-light);
  line-height: 1.8;
  max-width: 680px;
}

.section-prose p {
  margin-bottom: 1.2rem;
}

.section-prose p:last-child {
  margin-bottom: 0;
}

/* ── CONTENT WRAPPER ── */
.content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── SIDEBAR (ALDI + TJ pages) ── */
.page-body {
  display: grid;
  grid-template-columns: 260px 1fr;
  max-width: 1400px;
  margin: 0 auto;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 2rem 0 2rem 2rem;
  border-right: 1px solid var(--rule);
  background: var(--cream);
  scrollbar-width: thin;
  scrollbar-color: var(--rule) transparent;
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--rule); border-radius: 2px; }

.sidebar-label {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 1.2rem;
  padding-right: 1.5rem;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.nav-item a {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.45rem 1.5rem 0.45rem 0;
  text-decoration: none;
  color: var(--ink-light);
  font-size: 0.78rem;
  font-weight: 400;
  line-height: 1.35;
  transition: all 0.2s ease;
  border-left: 2px solid transparent;
  padding-left: 0.8rem;
  margin-left: -0.8rem;
}

.nav-item a:hover {
  color: var(--ink);
}

.nav-item a.active {
  color: var(--accent);
  font-weight: 500;
  border-left-color: var(--accent);
}

.nav-num {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--ink-faint);
  min-width: 1.4em;
  flex-shrink: 0;
}

.nav-item a.active .nav-num {
  color: var(--accent);
}

.nav-divider {
  height: 1px;
  background: var(--rule);
  margin: 1rem 1.5rem 1rem 0;
}

/* ── MAIN CONTENT (sidebar layout) ── */
.main-content {
  padding: 0 3rem 6rem;
  min-width: 0;
}

/* ── THEME SECTIONS (ALDI + TJ) ── */
.theme-section {
  padding-top: 4rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--rule);
}

.theme-section:last-of-type {
  border-bottom: none;
}

.section-header {
  margin-bottom: 2.5rem;
}

.section-number {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
}

.section-subtitle {
  font-size: 0.95rem;
  font-weight: 300;
  color: var(--ink-light);
  line-height: 1.6;
  max-width: 600px;
}

/* ── QUOTE CARDS (ALDI + TJ) ── */
.quotes-container {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.quote-card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 1.8rem 2rem;
  position: relative;
  transition: all 0.3s ease;
}

.quote-card:hover {
  border-color: var(--rule-dark, #B0AA98);
  box-shadow: 0 2px 20px rgba(26,26,24,0.04);
}

.quote-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--rule);
  border-radius: 2px 0 0 2px;
  transition: background 0.3s ease;
}

.quote-card:hover::before {
  background: var(--accent);
}

.quote-text {
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink);
  font-style: italic;
}

.quote-text:not(:only-child) {
  margin-bottom: 0;
}

.quote-card.featured {
  background: var(--ink);
  color: var(--cream);
  border-color: var(--ink);
  padding: 2.5rem 2.5rem;
}

.quote-card.featured::before {
  background: var(--accent);
}

.quote-card.featured .quote-text {
  color: var(--cream);
  font-size: 1.25rem;
  line-height: 1.6;
}

/* ── CHECKLIST (ALDI + TJ) ── */
.checklist-card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 2rem 2rem;
}

.checklist-title {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.2rem;
}

.checklist {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem 2rem;
}

.checklist li {
  font-size: 0.82rem;
  color: var(--ink-light);
  padding-left: 1.2rem;
  position: relative;
  line-height: 1.5;
}

.checklist li::before {
  content: '\2013';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 600;
}

/* ── TAKEAWAYS (ALDI + TJ) ── */
.takeaways-section {
  padding-top: 4rem;
}

.takeaways-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin-top: 2.5rem;
}

.takeaway-card {
  background: var(--paper);
  padding: 2rem;
  transition: background 0.2s ease;
}

.takeaway-card:hover {
  background: var(--highlight-bg, #FDF6E3);
}

.takeaway-num {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.6rem;
}

.takeaway-title {
  font-family: var(--serif);
  font-size: 1.1rem;
  line-height: 1.3;
  margin-bottom: 0.5rem;
  color: var(--ink);
}

.takeaway-desc {
  font-size: 0.82rem;
  color: var(--ink-light);
  line-height: 1.55;
  font-weight: 300;
}

/* ── INTRO SECTION (ALDI + TJ) ── */
.intro-section {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--rule);
}

.intro-header {
  margin-bottom: 2.5rem;
}

.intro-lead {
  font-family: var(--serif);
  font-size: 1.2rem;
  line-height: 1.7;
  color: var(--ink);
  max-width: 640px;
  margin-bottom: 2.5rem;
  font-weight: 400;
}

.intro-lead strong {
  color: var(--accent);
  font-weight: 400;
}

.intro-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 2.5rem;
}

.intro-pillar {
  background: var(--paper);
  padding: 2rem 1.5rem;
  transition: background 0.2s ease;
}

.intro-pillar:hover {
  background: var(--highlight-bg, #FDF6E3);
}

.intro-pillar-num {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
}

.intro-pillar-title {
  font-family: var(--serif);
  font-size: 1.15rem;
  line-height: 1.25;
  margin-bottom: 0.6rem;
  color: var(--ink);
}

.intro-pillar-desc {
  font-size: 0.8rem;
  color: var(--ink-light);
  line-height: 1.55;
  font-weight: 300;
}

.intro-context {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.intro-context-block {
  padding: 1.5rem 0;
  border-top: 2px solid var(--ink);
}

.intro-context-label {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.5rem;
}

.intro-context-text {
  font-size: 0.88rem;
  color: var(--ink-light);
  line-height: 1.6;
  font-weight: 300;
}

.intro-equation {
  background: var(--ink);
  color: var(--cream);
  border-radius: 3px;
  padding: 2.5rem 2rem;
  text-align: center;
  margin-bottom: 2rem;
}

.intro-equation-text {
  font-family: var(--serif);
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  line-height: 1.5;
  font-weight: 400;
}

.intro-equation-text .eq-accent {
  color: var(--accent);
}

.intro-equation-text .eq-dim {
  opacity: 0.4;
}

.intro-oneliner {
  font-family: var(--serif);
  font-size: 1rem;
  font-style: italic;
  color: var(--ink-light);
  text-align: center;
  padding-top: 0.5rem;
}

/* ── BIG QUOTE ── */
.big-quote {
  background: #111110;
  color: #F2EDE4;
  padding: 4rem 2rem;
  text-align: center;
  margin: 0 -2rem;
}

.big-quote-text {
  font-family: var(--serif);
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  font-weight: 400;
  font-style: italic;
  line-height: 1.6;
  max-width: 700px;
  margin: 0 auto 1rem;
}

.big-quote-source {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.4;
}

/* ── MOBILE NAV TOGGLE (ALDI + TJ) ── */
.mobile-nav-toggle {
  display: none;
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 101;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--cream);
  border: none;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  font-size: 1.2rem;
}

.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 99;
}

.mobile-overlay.open {
  display: block;
}

/* ── BACK TO TOP (ALDI + TJ) ── */
.back-to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 40px;
  height: 40px;
  background: var(--ink);
  color: var(--cream);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease;
  z-index: 50;
  font-size: 1rem;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--accent);
}

/* ── FOOTER ── */
.page-footer {
  text-align: center;
  padding: 4rem 2rem;
  border-top: 1px solid var(--rule);
  margin-top: 2rem;
}

.footer-text {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.footer-text a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-nav {
  margin-bottom: 1.5rem;
}

.footer-nav a {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  text-decoration: none;
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  margin: 0 0.3rem;
  transition: all 0.2s;
}

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

/* ── ANIMATIONS ── */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Stagger children */
.quotes-container .quote-card:nth-child(1) { transition-delay: 0ms; }
.quotes-container .quote-card:nth-child(2) { transition-delay: 60ms; }
.quotes-container .quote-card:nth-child(3) { transition-delay: 120ms; }
.quotes-container .quote-card:nth-child(4) { transition-delay: 180ms; }
.quotes-container .quote-card:nth-child(5) { transition-delay: 240ms; }
.quotes-container .quote-card:nth-child(6) { transition-delay: 300ms; }
.quotes-container .quote-card:nth-child(7) { transition-delay: 360ms; }
.quotes-container .quote-card:nth-child(8) { transition-delay: 420ms; }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .page-body {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    left: -100%;
    top: 0;
    width: 280px;
    z-index: 100;
    border-right: 1px solid var(--rule);
    transition: left 0.3s ease;
    box-shadow: 4px 0 30px rgba(0,0,0,0.1);
  }

  .sidebar.open {
    left: 0;
  }

  .mobile-nav-toggle {
    display: flex;
  }

  .main-content {
    padding: 0 1.5rem 4rem;
  }

  .intro-pillars {
    grid-template-columns: 1fr;
  }

  .intro-context {
    grid-template-columns: 1fr;
  }

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

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

  .quote-card {
    padding: 1.4rem 1.2rem;
  }

  .quote-card.featured {
    padding: 1.8rem 1.5rem;
  }

  .back-to-top {
    bottom: 5rem;
  }
}

@media (min-width: 901px) {
  .mobile-nav-toggle,
  .mobile-overlay {
    display: none !important;
  }
}

@media (max-width: 768px) {
  .hero h1 { font-size: clamp(2rem, 8vw, 2.5rem); }
  .hero-book-cover { max-height: 100px; }
  .content { padding: 0 1.5rem; }
  .section { padding: 3rem 0; }
  .big-quote { padding: 3rem 1.5rem; margin: 0 -1.5rem; }
  .footer-nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem; }
  .footer-nav a { margin: 0; }
}

@media (max-width: 600px) {
  .site-nav-left { display: none; }
  .site-nav-inner { justify-content: center; }
  .site-nav-links a {
    font-size: 0.55rem;
    padding: 0.5rem 0.5rem;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
}

@media (max-width: 375px) {
  .site-nav-links { gap: 0.1rem; }
  .site-nav-links a { font-size: 0.5rem; letter-spacing: 0.04em; padding: 0.5rem 0.4rem; }
}