@import url('https://fonts.googleapis.com/css2?family=Fraunces:wght@400;500;600;700&family=Source+Serif+4:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {

/* -----------------------------
   FONT TOKENS
----------------------------- */

--font-title: "Fraunces", serif;
--font-body: "Source Serif 4", serif;
--font-button: "Space Grotesk", sans-serif;

--weight-normal: 400;
--weight-medium: 500;
--weight-semibold: 600;
--weight-bold: 700;

/* -----------------------------
   COLOR SYSTEM (OKLCH)
   Cosmic Void Theme
----------------------------- */

/* Default Dark Theme */
--color-bg-0: oklch(8% 0.02 260);   /* deep void */
--color-bg-1: oklch(12% 0.03 260);  /* panels */
--color-bg-2: oklch(16% 0.04 260);  /* elevated */

/* Text */
--color-text-primary: oklch(92% 0.01 260);
--color-text-secondary: oklch(70% 0.02 260);
--color-text-muted: oklch(55% 0.02 260);

/* Accent — Arcane Cyan */
--color-accent: oklch(78% 0.19 210);
--color-accent-soft: oklch(65% 0.12 210);
--color-accent-glow: oklch(85% 0.22 210);
--color-accent-contrast: oklch(8% 0.02 260);

/* Borders */
--color-border-subtle: oklch(30% 0.03 260 / 0.4);
--color-border-strong: oklch(50% 0.05 260);

/* States */
--color-danger: oklch(65% 0.22 25);
--color-danger-soft: oklch(65% 0.22 25 / 0.15);
--color-success: oklch(70% 0.18 150);
--color-success-soft: oklch(70% 0.18 150 / 0.15);

/* Semantic colors */
--color-surface-mixed: oklch(12% 0.08 210 / 0.2);
--color-overlay: oklch(0% 0 0 / 0.7);

/* -----------------------------
   SPACING SCALE (fluid)
----------------------------- */

--space-xs: clamp(0.4rem, 0.3rem + 0.2vw, 0.6rem);
--space-sm: clamp(0.6rem, 0.5rem + 0.3vw, 0.9rem);
--space-md: clamp(1rem, 0.8rem + 0.4vw, 1.4rem);
--space-lg: clamp(1.6rem, 1.2rem + 0.6vw, 2.4rem);
--space-xl: clamp(2.4rem, 2rem + 1vw, 3.5rem);

/* -----------------------------
   TYPOGRAPHY SCALE
----------------------------- */

--text-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.85rem);
--text-sm: clamp(0.9rem, 0.85rem + 0.2vw, 1rem);
--text-md: clamp(1rem, 0.95rem + 0.3vw, 1.15rem);
--text-lg: clamp(1.2rem, 1.1rem + 0.4vw, 1.4rem);
--text-xl: clamp(1.6rem, 1.3rem + 1vw, 2.2rem);
--text-2xl: clamp(2rem, 1.5rem + 2vw, 3rem);
--text-3xl: clamp(2.5rem, 2rem + 4vw, 5rem);
--text-hero: clamp(3rem, 2.5rem + 5vw, 6rem);

--leading-tight: 1.2;
--leading-normal: 1.5;
--leading-relaxed: 1.8;

--tracking-tight: -0.01em;
--tracking-normal: 0;
--tracking-wide: 0.02em;

/* -----------------------------
   RADIUS
----------------------------- */

--radius-sm: 6px;
--radius-md: 12px;
--radius-lg: 18px;
--radius-pill: 999px;

/* -----------------------------
   SHADOW + GLOW
----------------------------- */

--shadow-elev-1:
  0 2px 10px oklch(0% 0 0 / 0.35);

--shadow-elev-2:
  0 10px 30px oklch(0% 0 0 / 0.5);

--glow-accent:
  0 0 6px var(--color-accent),
  0 0 18px var(--color-accent-soft);

/* -----------------------------
   MOTION
----------------------------- */

--ease-smooth: cubic-bezier(.22,.61,.36,1);
--duration-fast: 120ms;
--duration-mid: 240ms;
--duration-slow: 600ms;

/* -----------------------------
   LAYOUT WIDTH
----------------------------- */

--content-width: 72ch;
--wide-width: 1200px;

}

/* -----------------------------
   GLOBAL RESET + BASE
----------------------------- */

*, *::before, *::after {
  box-sizing: border-box;
}

:where(html) {
  color-scheme: dark light;
  hanging-punctuation: first last;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

.theme-light {
  /* Base surfaces */
  --color-bg-0: oklch(98% 0.01 260);
  --color-bg-1: oklch(95% 0.01 260);
  --color-bg-2: oklch(92% 0.01 260);

  /* Text */
  --color-text-primary: oklch(20% 0.02 260);
  --color-text-secondary: oklch(40% 0.02 260);
  --color-text-muted: oklch(55% 0.02 260);

  /* Accent — Arcane Cyan (slightly adjusted for light mode) */
  --color-accent: oklch(60% 0.15 210);
  --color-accent-soft: oklch(70% 0.1 210);
  --color-accent-glow: oklch(50% 0.2 210);
  --color-accent-contrast: oklch(98% 0.01 260);

  /* Borders */
  --color-border-subtle: oklch(85% 0.01 260);
  --color-border-strong: oklch(70% 0.02 260);

  /* Semantic colors */
  --color-surface-mixed: oklch(90% 0.05 210 / 0.2);
  --color-overlay: oklch(0% 0 0 / 0.4);
  --color-danger-soft: oklch(65% 0.22 25 / 0.1);
  --color-success-soft: oklch(70% 0.18 150 / 0.1);

  /* Overrides for specific components */
  --shadow-elev-1: 0 2px 10px oklch(0% 0 0 / 0.1);
  --shadow-elev-2: 0 10px 30px oklch(0% 0 0 / 0.15);
}

:where(body) {
  min-height: 100dvh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--color-bg-0);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: var(--leading-relaxed);
}

/* Remove default margins safely */
:where(h1, h2, h3, h4, p, figure, blockquote, dl, dd) {
  margin: 0;
}

:where(h1, h2, h3, h4) {
  font-family: var(--font-title);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
  text-wrap: balance;
}

/* Media defaults */
:where(img, picture, video, canvas, svg) {
  display: block;
  max-width: 100%;
}

/* Form elements inherit fonts */
:where(input, button, textarea, select) {
  font: inherit;
}

/* Page wrapper becomes a query container */
.page {
  container-type: inline-size;
  container-name: layout;
}

/* Example container query */
@container layout (width >= 900px) {
  .main {
    padding: var(--space-xl);
  }
}

a {
  color: var(--color-accent);
  text-decoration: none;
  position: relative;

  &::after {
    content: "";
    position: absolute;
    inset-inline: 0;
    bottom: -2px;
    height: 1px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--duration-fast) var(--ease-smooth);
  }

  &:hover::after {
    transform: scaleX(1);
  }
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-accent-soft) var(--color-bg-1);
}

*::-webkit-scrollbar {
  width: 10px;
}

*::-webkit-scrollbar-track {
  background: var(--color-bg-1);
}

*::-webkit-scrollbar-thumb {
  background: var(--color-accent-soft);
  border-radius: var(--radius-pill);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

p {
  color: var(--color-text-secondary);
  max-width: 65ch;
  line-height: var(--leading-relaxed);
}

strong {
  color: var(--color-text-primary);
}

small {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* -----------------------------
   LAYOUT UTILITIES
----------------------------- */

.main {
  max-width: var(--wide-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

/* Panel component for cards */
.panel {
  background: var(--color-bg-1);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-elev-1);
}

/* -----------------------------
   HEADER
----------------------------- */

.site-header {
  position: fixed;
  inset-block-start: 1rem;
  inset-inline-start: 50%;
  transform: translateX(-50%);
  inline-size: min(var(--wide-width), calc(100% - 2rem));
  z-index: 1000;
  padding-block: 0.6rem;
  background: var(--color-bg-1);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-elev-2);
  transition: all var(--duration-mid) var(--ease-smooth);

  &.scrolled {
    border-color: var(--color-accent-soft);
    box-shadow: var(--shadow-elev-2), 0 0 15px oklch(0% 0 0 / 0.1);
  }
}

.header-container {
  max-width: var(--wide-width);
  margin-inline: auto;
  padding-inline: var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  position: relative; /* For absolute positioned mobile menu */
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-title);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: var(--tracking-tight);
}

.site-logo::after {
  display: none;
}

.sigil-icon {
  width: 32px;
  height: 32px;
  color: var(--color-accent);
  filter: drop-shadow(0 0 8px var(--color-accent-soft));
}

.site-title {
  white-space: nowrap;
}

/* Navigation */
.main-nav {
  flex: 1;
}

.nav-list {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  padding: 0;
  margin: 0;
  justify-content: center;

  & a {
    font-family: var(--font-button);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-smooth);
    letter-spacing: var(--tracking-wide);

    &::after {
      display: none;
    }

    &:hover {
      color: var(--color-accent);
    }
  }
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: transparent;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-pill);
  inline-size: 36px;
  block-size: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-smooth);

  &:hover {
    background: var(--color-bg-1);
    border-color: var(--color-accent-soft);
    color: var(--color-accent);
  }

  & :is(svg, i) {
    inline-size: 20px;
    block-size: 20px;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* Show/hide icons based on theme */
.theme-toggle-btn .sun-icon { display: none; }
.theme-toggle-btn .moon-icon { display: flex; }

.theme-light .theme-toggle-btn .sun-icon { display: flex; }
.theme-light .theme-toggle-btn .moon-icon { display: none; }

/* Account Button */
.btn-account {
  font-family: var(--font-button);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-primary);
  padding: var(--space-xs) var(--space-md);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-pill);
  background: transparent;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-smooth);
  text-decoration: none;

  &::after {
    display: none;
  }

  &:hover {
    border-color: var(--color-accent);
    background: var(--color-bg-1);
    color: var(--color-accent);
  }
}

/* Responsive Header */
@media (width <= 768px) {
  .nav-list {
    gap: var(--space-md);
  }
  
  .site-title {
    display: none;
  }
}

/* -----------------------------
   MOBILE NAVIGATION
----------------------------- */

.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--radius-pill);
  transition: all var(--duration-fast) var(--ease-smooth);
  align-items: center;
  justify-content: center;

  &:hover {
    background: var(--color-bg-2);
    color: var(--color-accent);
  }

  & :is(svg, i) {
    inline-size: 24px;
    block-size: 24px;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  &.active {
    color: var(--color-accent);
    background: var(--color-bg-2);
  }
}

@media (width <= 600px) {
  .main-nav {
    display: none;
  }

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

  .header-container {
    padding-inline: var(--space-md);
    gap: var(--space-sm);
  }
}

.mobile-menu {
  position: absolute;
  top: calc(100% + 0.75rem);
  left: 0;
  width: 100%;
  background: var(--color-bg-1);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-elev-2);
  padding: var(--space-md);
  display: none;
  flex-direction: column;
  gap: var(--space-md);
  z-index: 999;
  animation: mobileMenuSlide 0.3s var(--ease-smooth);
}

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

.mobile-menu.active {
  display: flex;
}

.mobile-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.mobile-nav-list a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-button);
  font-size: var(--text-md);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-smooth);
}

.mobile-nav-list a:hover {
  background: var(--color-bg-2);
  color: var(--color-accent);
}

/* -----------------------------
   HERO SECTION
----------------------------- */

.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-block: var(--space-xl);
  padding-inline: var(--space-md);
  overflow: hidden;

  & .hero-ambient {
    position: absolute;
    inset: 0;
    background: radial-gradient(
      circle at 50% 50%,
      var(--color-surface-mixed) 0%,
      transparent 60%
    );
    pointer-events: none;
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.hero-sigil {
  inline-size: clamp(120px, 20vw, 200px);
  aspect-ratio: 1;
  color: var(--color-accent);
  filter: drop-shadow(var(--glow-accent));
  opacity: 0.9;
}

.hero-title {
  font-family: var(--font-title);
  font-size: var(--text-hero);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
}

.hero-tagline {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 60ch;
  margin: 0;
  line-height: var(--leading-relaxed);
}

/* -----------------------------
   BUTTONS
----------------------------- */

.btn-primary,
.btn-secondary {
  font-family: var(--font-button);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wide);
  padding-block: var(--space-sm);
  padding-inline: var(--space-lg);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--duration-mid) var(--ease-smooth);
  text-decoration: none;
  display: inline-block;
  border: 1px solid transparent;

  &::after {
    display: none;
  }
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  box-shadow: var(--glow-accent);

  &:hover {
    background: var(--color-accent-glow);
    transform: translateY(-2px);
    box-shadow: 0 0 12px var(--color-accent),
                0 0 24px var(--color-accent-soft);
  }
}

.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);

  &:hover {
    background: var(--color-accent);
    color: var(--color-accent-contrast);
    box-shadow: var(--glow-accent);
  }
}

/* -----------------------------
   SECTION TITLES
----------------------------- */

.section-title {
  font-family: var(--font-title);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  text-align: center;
  margin-bottom: var(--space-xl);
  letter-spacing: var(--tracking-tight);
}

/* -----------------------------
   LATEST CHAPTER SECTION
----------------------------- */

.latest-chapter {
  padding-block: var(--space-xl);
  background: var(--color-bg-0);
}

.chapter-highlight {
  max-width: var(--content-width);
  margin-inline: auto;

  & .chapter-meta {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
  }

  & .chapter-number {
    font-weight: var(--weight-semibold);
    color: var(--color-accent);
    font-family: var(--font-button);
    letter-spacing: var(--tracking-wide);
  }

  & .chapter-title {
    font-family: var(--font-title);
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
    letter-spacing: var(--tracking-tight);
  }

  & .chapter-excerpt {
    margin-bottom: var(--space-lg);
    line-height: var(--leading-relaxed);
    font-size: var(--text-md);
  }
}

/* -----------------------------
   UNIVERSE PORTAL GRID
----------------------------- */

.universe-portals {
  padding-block: var(--space-xl);
  background: var(--color-bg-0);
}

.portal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.portal-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transition: all var(--duration-mid) var(--ease-smooth);
  cursor: pointer;

  &:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-elev-2);
    border-color: var(--color-accent-soft);

    & .portal-link {
      transform: translateX(4px);
    }
  }

  & .portal-icon {
    inline-size: 48px;
    block-size: 48px;
    color: var(--color-accent);
    opacity: 0.8;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
  }

  & .portal-title {
    font-family: var(--font-title);
    font-size: var(--text-lg);
    font-weight: var(--weight-semibold);
    color: var(--color-text-primary);
    letter-spacing: var(--tracking-tight);
  }

  & .portal-description {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    flex: 1;
    margin: 0;
    line-height: var(--leading-normal);
  }

  & .portal-link {
    font-family: var(--font-button);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-accent);
    align-self: flex-start;
    transition: transform var(--duration-fast) var(--ease-smooth);
  }
}

/* -----------------------------
   ABOUT PROJECT SECTION
----------------------------- */

.about-project {
  padding-block: var(--space-xl);
  background: var(--color-bg-0);
}

.about-content {
  display: grid;
  gap: var(--space-xl);
  max-width: var(--content-width);
  margin-inline: auto;

  & :is(.about-story, .about-author) {
    & h3 {
      font-family: var(--font-title);
      font-size: var(--text-lg);
      font-weight: 600;
      color: var(--color-text-primary);
      margin-bottom: var(--space-md);
    }

    & p {
      margin-bottom: var(--space-md);

      &:last-child {
        margin-bottom: 0;
      }
    }
  }
}

@media (width >= 900px) {
  .about-content {
    grid-template-columns: 2fr 1fr;
    max-width: var(--wide-width);
  }
}

/* -----------------------------
   FOOTER
----------------------------- */

.site-footer {
  padding-block: var(--space-xl) var(--space-lg);
  background: var(--color-bg-1);
  border-block-start: 1px solid var(--color-border-subtle);
  margin-block-start: var(--space-xl);
}

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

.footer-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);

  & .footer-copyright {
    margin: 0;
  }
}

.footer-legal {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;

  & a {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    transition: color var(--duration-fast) var(--ease-smooth);

    &:hover {
      color: var(--color-accent);
    }
  }
}

.footer-social {
  display: flex;
  gap: var(--space-lg);

  & a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    transition: color var(--duration-fast) var(--ease-smooth);

    &:hover {
      color: var(--color-accent);
    }

    & :is(svg, i) {
      inline-size: 1.25rem;
      block-size: 1.25rem;
      font-size: 1.25rem;
      display: flex;
      align-items: center;
      justify-content: center;
    }
  }
}

/* -----------------------------
   TOAST NOTIFICATIONS
----------------------------- */

.toast-container {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  z-index: 2000;
}

.toast {
  background: var(--color-bg-1);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding-block: var(--space-sm);
  padding-inline: var(--space-md);
  box-shadow: var(--shadow-elev-2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-inline-size: 280px;
  max-inline-size: 400px;
  animation: toastSlideIn 0.3s var(--ease-smooth);

  &.toast-fade-out {
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s var(--ease-smooth);
  }

  &.toast-success {
    border-inline-start: 4px solid var(--color-success);
  }

  &.toast-error {
    border-inline-start: 4px solid var(--color-danger);
  }

  &.toast-info {
    border-inline-start: 4px solid var(--color-accent);
  }

  & .toast-content {
    font-size: var(--text-sm);
  }

  & .toast-close {
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    line-height: 1;

    &:hover {
      color: var(--color-text-primary);
    }
  }
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@media (width <= 600px) {
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}