/* ==========================================================================
   style.css - Editorial Portfolio Design System
   Inspired by s0animation.com (expanding reveal rhythm) & bymonolog.com (paper-cut stacking)
   ========================================================================== */

/* Design Tokens & CSS Variables */
:root {
  --bg-canvas: #FAF8F5;          /* Warm ivory art paper */
  --bg-card: #FFFFFF;            /* Pure white paper-cut plinth */
  --bg-subtle: #F2EFE9;          /* Tactile paper gray */
  --border-paper: rgba(18, 19, 22, 0.08); /* 1px paper edge */
  --border-focus: rgba(18, 19, 22, 0.25);
  
  --ink-primary: #121316;        /* Deep charcoal ink */
  --ink-secondary: #4A4D57;      /* Refined editorial secondary */
  --ink-muted: #8A8D98;          /* Muted coordinate stamp */
  
  --accent-color: #121316;       /* Minimalist high-contrast accent */
  --font-serif: 'Playfair Display', 'Noto Serif TC', 'Songti TC', Georgia, serif;
  --font-sans: 'Inter', 'Noto Serif TC', -apple-system, BlinkMacSystemFont, serif;
  --font-mono: 'Geist Mono', 'SF Mono', monospace;

  --ease-expo: cubic-bezier(0.83, 0, 0.17, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Global Scaffolding */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-serif);
  background-color: var(--bg-canvas);
  color: var(--ink-primary);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  background-color: var(--bg-canvas);
  position: relative;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Lenis Smooth Scroll Core Rules (Standard Specificity) */
html.lenis, html.lenis body {
  height: auto;
}
html.lenis .lenis.lenis-smooth {
  scroll-behavior: auto;
}
html.lenis .lenis.lenis-smooth [data-lenis-prevent] {
  overscroll-behavior: contain;
}
html.lenis .lenis.lenis-stopped {
  overflow: hidden;
}

/* ==========================================================================
   Paper Grain Texture Overlay
   ========================================================================== */
.grain-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 999;
  opacity: 0.042;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Background Ambient Canvas */
#ambient-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
}

/* ==========================================================================
   Navigation Bar & bymonolog Hover Micro-Interactions
   ========================================================================== */
/* ==========================================================================
   Navigation Bar (1:1 bymonolog.com Header Hierarchy)
   ========================================================================== */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem 4vw;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
  pointer-events: auto;
}

.navbar-brand-wrap {
  display: flex;
  align-items: center;
}

.nav-brand {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--ink-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

/* Right Navigation Group: Single Unified Seamless Bar */
.navbar-right-group {
  display: flex;
  align-items: center;
}

/* 1. Monolog Contiguous Seamless Links List (ul / li) */
.navbar-links-ul {
  list-style: none;
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
  gap: 0px;
}

.navbar-links-li {
  display: flex;
  align-items: center;
}

/* Unified Link Item with Pure 0px Sharp Block Fill */
.navbar-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink-primary);
  text-decoration: none;
  letter-spacing: 0.03em;
  position: relative;
  padding: 0.45rem 1.15rem;
  border-radius: 0px;
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  background: transparent;
  overflow: hidden;
  transition: color 0.3s cubic-bezier(0.16, 1, 0.35, 1);
  z-index: 1;
}

/* Monolog Exact [data-link-hover]::before Block Wipe */
.navbar-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 0px;
  background-color: var(--ink-primary);
  transform-origin: right;
  transform: scaleX(0);
  transition: transform 600ms cubic-bezier(0.2, 1, 0.36, 1);
  z-index: -1;
}

.navbar-link-text {
  position: relative;
  z-index: 2;
  transition: color 0.3s cubic-bezier(0.16, 1, 0.35, 1);
}

.navbar-link:hover::before {
  transform-origin: left;
  transform: scaleX(1);
}

.navbar-link:hover .navbar-link-text {
  color: var(--bg-canvas);
}

/* GitHub 45° Vector Flying Arrow Inside Unified Bar */
.navbar-arrow-box {
  position: relative;
  width: 10px;
  height: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  z-index: 2;
}

.navbar-arrow-svg {
  position: relative;
  width: 10px;
  height: 10px;
  color: var(--ink-primary);
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.35, 1), color 0.3s ease;
}

.navbar-arrow-svg.is-duplicate {
  position: absolute;
  top: 0;
  left: 0;
  transform: translate(-100%, 100%);
}

.navbar-link:hover .navbar-arrow-svg {
  color: var(--bg-canvas);
}

.navbar-link:hover .navbar-arrow-svg:not(.is-duplicate) {
  transform: translate(100%, -100%);
}

.navbar-link:hover .navbar-arrow-svg.is-duplicate {
  transform: translate(0, 0);
}

/* ==========================================================================
   Hero Section & s0animation 1:1 Viewport Reveal Frame
   ========================================================================== */
.hero-section {
  position: relative;
  width: 100vw;
  height: 100vh;
  min-height: 640px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.hero-viewport-frame {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-canvas);
  border: 1px solid var(--border-paper);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  will-change: clip-path, transform;
}

.hero-media-inner {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4vw;
  will-change: transform;
}

.preloader-center-badge {
  position: absolute;
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--ink-secondary);
}

.preloader-spin-icon {
  width: 24px;
  height: 24px;
  border: 2px solid rgba(18, 19, 22, 0.15);
  border-top-color: var(--ink-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.hero-content-wrap {
  max-width: 960px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
  z-index: 10;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1rem;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--border-paper);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-secondary);
  letter-spacing: 0.05em;
  box-shadow: 0 2px 8px rgba(18, 19, 22, 0.03);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.hero-title-container {
  overflow: hidden;
}

.hero-title-line {
  font-family: var(--font-serif);
  font-size: clamp(3.4rem, 9vw, 6.8rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--ink-primary);
}

.hero-tagline {
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  color: var(--ink-secondary);
  line-height: 1.6;
  max-width: 620px;
  font-weight: 400;
}

.hero-scroll-prompt {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
  letter-spacing: 0.06em;
}

.hero-scroll-arrow {
  animation: bounceDown 1.8s infinite ease-in-out;
}

@keyframes bounceDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(5px); }
}

/* ==========================================================================
   Works Section & bymonolog 1:1 Open Editorial Grid Layout
   ========================================================================== */
.works-section {
  position: relative;
  width: 100%;
  padding: 8rem 4vw 10rem 4vw;
  z-index: 20;
}

.section-header-block {
  max-width: 1200px;
  margin: 0 auto 5rem auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 1px solid rgba(18, 19, 22, 0.08);
  padding-bottom: 2rem;
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-muted);
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  color: var(--ink-primary);
  letter-spacing: -0.02em;
}

.section-index-stamp {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-secondary);
}

/* Open-Air List Container (Zero Cards, Continuous Canvas) */
.works-cards-wrap {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

/* Individual Open Editorial Item */
.works-home-item {
  width: 100%;
  border-bottom: 1px solid rgba(18, 19, 22, 0.08);
  padding: 4.5rem 0;
}

.works-home-item:first-child {
  padding-top: 1rem;
}

.works-home-link {
  display: grid;
  grid-template-columns: 7fr 5fr; /* 1:1 Monolog 7:5 Column Ratio */
  gap: clamp(2rem, 5vw, 5rem);
  align-items: stretch;
  text-decoration: none;
  color: inherit;
}

/* Left: Architecture Visual Window (Columns 1-7, 58%) */
.works-visual-column {
  width: 100%;
}

.works-image-mask {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: 4px; /* Minimal crisp architectural frame */
  overflow: hidden;
  position: relative;
  background: #18191D;
}

.works-home-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  will-change: transform;
  filter: brightness(0.96) contrast(1.04);
  transition: filter 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.works-home-link:hover .works-home-image {
  filter: brightness(1.02) contrast(1.06);
}

.works-placeholder-visual {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.placeholder-icon {
  font-size: 2.2rem;
}

.placeholder-text {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--ink-secondary);
}

/* Right: Open Editorial Content Details (Columns 8-12, 42%) */
.works-content-column {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 0.5rem 0 1rem 0;
}

.works-content-header {
  display: flex;
  flex-direction: column;
}

/* SS / 01/03 Stamp Badge */
.works-meta-stamp {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-secondary);
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.meta-index-pill {
  border: 1px solid rgba(18, 19, 22, 0.25);
  border-radius: 3px;
  padding: 0.1rem 0.4rem;
  font-size: 0.72rem;
}

.works-project-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 2.8vw, 2.4rem);
  font-weight: 700; /* 思源宋體 Bold */
  color: var(--ink-primary);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.2rem;
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.35, 1);
}

.works-home-link:hover .works-project-title {
  transform: translateX(4px);
}

.works-project-desc {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 300; /* 思源宋體 Light / 細體 提升長文呼吸感 */
  line-height: 1.8;
  color: var(--ink-secondary);
  max-width: 440px;
}

/* Bottom Highlight Impact Metric (21% Increase...) */
.works-result-block {
  margin-top: 3.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.result-number {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 3.2vw, 2.8rem);
  font-weight: 700;
  color: var(--ink-primary);
  line-height: 1;
  letter-spacing: -0.03em;
}

.result-label {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  font-weight: 500; /* 思源宋體 Medium / 中黑 強化標籤辨識度 */
  line-height: 1.5;
  color: var(--ink-muted);
  max-width: 380px;
}

/* Responsive Grid for Tablets & Mobile */
@media (max-width: 860px) {
  .works-home-link {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .works-result-block {
    margin-top: 2rem;
  }
}

  background: #94A3B8;
}

/* ==========================================================================
   About & Statement Section
   ========================================================================== */
.about-section {
  position: relative;
  width: 100%;
  padding: 6rem 4vw 8rem 4vw;
  background: #F4F1EA;
  border-top: 1px solid var(--border-paper);
  border-bottom: 1px solid var(--border-paper);
  z-index: 20;
}

.about-content-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.about-quote {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.8vw, 2.8rem);
  font-weight: 400;
  line-height: 1.35;
  color: var(--ink-primary);
}

.about-details-p {
  font-size: 1.1rem;
  color: var(--ink-secondary);
  line-height: 1.7;
  max-width: 760px;
}

/* ==========================================================================
   Footer Section
   ========================================================================== */
.site-footer {
  position: relative;
  width: 100%;
  padding: 5rem 4vw 4rem 4vw;
  background: var(--bg-canvas);
  z-index: 20;
}

.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.footer-cta-block {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-paper);
  padding-bottom: 2.5rem;
}

.footer-big-heading {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5.5vw, 3.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.footer-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1.8rem;
  border-radius: 9999px;
  background: var(--ink-primary);
  color: var(--bg-canvas);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  transition: transform 0.25s ease;
}

.footer-action-btn:hover {
  transform: translateY(-3px);
}

.footer-bottom-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
}

/* ==========================================================================
   Responsive Adaptations (< 768px)
   ========================================================================== */
@media (max-width: 768px) {
  .site-nav {
    padding: 1.25rem 5vw;
  }

  .nav-links {
    gap: 1rem;
  }

  .card-grid-split {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .paper-stack-card {
    padding: 1.5rem;
    border-radius: 18px;
  }

  .footer-cta-block {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }

  .footer-bottom-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.8rem;
  }
}