/* ============================================
   WORKS by nekoojisan - Portfolio Stylesheet
   ============================================ */

/* --------------------------------------------
   CSS Variables
-------------------------------------------- */
:root {
  /* Colors */
  --color-primary: #4A4A4A;
  --color-secondary: #333333;
  --color-accent: #FF6B81;
  --color-accent-hover: #ff8a9b;
  --color-gold: #D4AF37;
  --color-gold-hover: #e5c356;
  --color-bg: #F5F5F5;
  --color-bg-secondary: #FFFFFF;
  --color-text: #4A4A4A;
  --color-text-muted: #888888;
  --color-border: #e0e0e0;

  /* Typography */
  --font-family: 'Noto Sans JP', sans-serif;
  --font-display: 'Playfair Display', serif;
  --font-size-base: 16px;
  --font-weight-normal: 400;
  --font-weight-bold: 700;
  --line-height: 1.6;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;
  --section-gap: 100px;

  /* Visual */
  --radius: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);

  /* Transition */
  --transition: 0.5s ease;
  --transition-fast: 0.3s ease;

  /* Layout */
  --container-max: 1200px;
  --header-height: 80px;
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

@media (min-width: 1024px) {
  .container {
    padding: 0 40px;
  }
}

/* --------------------------------------------
   Loading Screen
-------------------------------------------- */
.loading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading.fade-out {
  opacity: 0;
  visibility: hidden;
}

.loading-content {
  text-align: center;
}

.loading-logo {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: var(--font-weight-bold);
  color: #fff;
  letter-spacing: 0.2em;
  margin-bottom: var(--spacing-md);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.loading-bar {
  width: 200px;
  height: 4px;
  background: rgba(255,255,255,0.2);
  border-radius: 2px;
  overflow: hidden;
}

.loading-bar-inner {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  border-radius: 2px;
  animation: loading 1.5s ease forwards;
}

@keyframes loading {
  0% { width: 0%; }
  100% { width: 100%; }
}

/* --------------------------------------------
   Header
-------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(74, 74, 74, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media (min-width: 1024px) {
  .header-inner {
    padding: 0 40px;
  }
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: #fff;
  letter-spacing: 0.1em;
  transition: var(--transition-fast);
}

.logo:hover {
  color: var(--color-accent);
}

.nav {
  display: none;
}

@media (min-width: 768px) {
  .nav {
    display: block;
  }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-link {
  font-size: 0.875rem;
  font-weight: var(--font-weight-bold);
  color: rgba(255,255,255,0.8);
  transition: var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: var(--transition-fast);
}

.nav-link:hover {
  color: #fff;
}

.nav-link:hover::after {
  width: 100%;
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 30px;
  height: 30px;
  padding: 0;
}

.mobile-menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background: #fff;
  transition: var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  background: var(--color-primary);
  padding: var(--spacing-md);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
}

.mobile-menu.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.mobile-nav-link {
  display: block;
  padding: var(--spacing-sm);
  font-size: 1rem;
  font-weight: var(--font-weight-bold);
  color: rgba(255,255,255,0.8);
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius);
  text-align: center;
  transition: var(--transition-fast);
}

.mobile-nav-link:hover {
  color: #fff;
  background: rgba(255,255,255,0.1);
}

@media (min-width: 768px) {
  .mobile-menu {
    display: none;
  }
}

/* --------------------------------------------
   Parallax Sections
-------------------------------------------- */
.parallax-section {
  position: relative;
  overflow: hidden;
}

.parallax-bg {
  position: absolute;
  top: -20%;
  left: 0;
  width: 100%;
  height: 140%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  will-change: transform;
  z-index: 0;
}

.parallax-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(74, 74, 74, 0.85);
  z-index: 1;
}

/* --------------------------------------------
   Hero Section
-------------------------------------------- */
.hero {
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
}

.hero-subtitle {
  font-size: clamp(0.875rem, 2vw, 1rem);
  color: var(--color-gold);
  letter-spacing: 0.3em;
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(4rem, 15vw, 10rem);
  font-weight: var(--font-weight-bold);
  color: #fff;
  letter-spacing: 0.1em;
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.hero-tagline {
  font-size: clamp(1rem, 3vw, 1.5rem);
  color: rgba(255,255,255,0.7);
  letter-spacing: 0.2em;
  margin-bottom: var(--spacing-lg);
}

.hero-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 16px 32px;
  font-size: 0.875rem;
  font-weight: var(--font-weight-bold);
  color: #fff;
  background: transparent;
  border: 2px solid var(--color-accent);
  border-radius: 50px;
  transition: var(--transition-fast);
}

.hero-btn:hover {
  background: var(--color-accent);
  color: #fff;
}

.hero-btn i {
  animation: bounce 2s ease-in-out infinite;
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.5);
  font-size: 1.5rem;
  animation: bounce 2s ease-in-out infinite;
  z-index: 2;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(10px); }
}

/* --------------------------------------------
   Section Header
-------------------------------------------- */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-xs);
}

.section-subtitle {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  letter-spacing: 0.2em;
}

/* --------------------------------------------
   Works Section
-------------------------------------------- */
.works-section {
  padding: var(--section-gap) 0;
  background: var(--color-bg);
}

/* Filter */
.filter-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

@media (min-width: 768px) {
  .filter-container {
    flex-direction: row;
    justify-content: center;
    gap: var(--spacing-lg);
  }
}

.filter-group {
  text-align: center;
}

.filter-label {
  display: block;
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-xs);
}

.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.filter-btn {
  padding: 8px 16px;
  font-size: 0.8rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-muted);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  transition: var(--transition-fast);
}

.filter-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.filter-btn.active {
  color: #fff;
  background: var(--color-primary);
  border-color: var(--color-primary);
}

/* Works Grid (Masonry) */
.works-grid {
  columns: 1;
  column-gap: var(--spacing-md);
}

@media (min-width: 640px) {
  .works-grid {
    columns: 2;
  }
}

@media (min-width: 1024px) {
  .works-grid {
    columns: 3;
  }
}

/* Work Card */
.work-card {
  break-inside: avoid;
  margin-bottom: var(--spacing-md);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-secondary);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
  cursor: pointer;
}

.work-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.work-card-image {
  position: relative;
  overflow: hidden;
}

.work-card-image img {
  width: 100%;
  height: auto;
  transition: var(--transition);
}

.work-card:hover .work-card-image img {
  transform: scale(1.05);
}

.work-card-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(74,74,74,0.9) 0%, transparent 50%);
  opacity: 0;
  transition: var(--transition-fast);
  display: flex;
  align-items: flex-end;
  padding: var(--spacing-md);
}

.work-card:hover .work-card-overlay {
  opacity: 1;
}

.work-card-overlay-content {
  color: #fff;
}

.work-card-overlay-title {
  font-size: 1.125rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-xs);
}

.work-card-overlay-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--color-accent);
}

.work-card-info {
  padding: var(--spacing-md);
}

.work-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--spacing-xs);
}

.work-tag {
  padding: 4px 10px;
  font-size: 0.7rem;
  font-weight: var(--font-weight-bold);
  border-radius: 50px;
}

.work-tag.industry {
  color: var(--color-accent);
  background: rgba(255, 107, 129, 0.1);
}

.work-tag.type {
  color: var(--color-gold);
  background: rgba(212, 175, 55, 0.1);
}

.work-card-title {
  font-size: 1rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.work-card-desc {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* No Results */
.no-results {
  text-align: center;
  padding: var(--spacing-xl) 0;
  color: var(--color-text-muted);
}

/* --------------------------------------------
   Divider Section
-------------------------------------------- */
.divider-section {
  padding: var(--section-gap) 0;
}

.divider-content {
  position: relative;
  z-index: 2;
  text-align: center;
}

.divider-text {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-style: italic;
  color: #fff;
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.divider-author {
  font-size: 0.875rem;
  color: var(--color-gold);
  letter-spacing: 0.1em;
}

/* --------------------------------------------
   About Section
-------------------------------------------- */
.about-section {
  padding: var(--section-gap) 0;
  background: var(--color-bg-secondary);
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-text {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.about-text p {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 2;
  margin-bottom: var(--spacing-sm);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.skill-item {
  text-align: center;
  padding: var(--spacing-md);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  transition: var(--transition-fast);
}

.skill-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.skill-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-gold));
  color: #fff;
  border-radius: 50%;
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.skill-item h4 {
  font-size: 1.125rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.skill-item p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* --------------------------------------------
   Contact Section
-------------------------------------------- */
.contact-section {
  padding: var(--section-gap) 0;
}

.contact-content {
  position: relative;
  z-index: 2;
  text-align: center;
}

.contact-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: var(--font-weight-bold);
  color: #fff;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.contact-text {
  font-size: 1rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: var(--spacing-md);
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 16px 40px;
  font-size: 1rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  background: var(--color-gold);
  border-radius: 50px;
  transition: var(--transition-fast);
}

.contact-btn:hover {
  background: var(--color-gold-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(212, 175, 55, 0.4);
}

/* --------------------------------------------
   Footer
-------------------------------------------- */
.footer {
  padding: var(--spacing-lg) 0;
  background: var(--color-primary);
}

.footer-content {
  text-align: center;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: #fff;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-sm);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.footer-link {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  transition: var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-accent);
}

.footer-copy {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.4);
}

/* --------------------------------------------
   Modal
-------------------------------------------- */
.work-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
}

.work-modal.active {
  display: flex;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.8);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: rgba(0,0,0,0.5);
  border-radius: 50%;
  z-index: 10;
  transition: var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-accent);
}

.modal-body {
  overflow-y: auto;
  max-height: 90vh;
}

.modal-image {
  width: 100%;
  height: auto;
}

.modal-info {
  padding: var(--spacing-md);
}

.modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: var(--spacing-sm);
}

.modal-title {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.modal-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.modal-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.9rem;
  font-weight: var(--font-weight-bold);
  color: #fff;
  background: linear-gradient(135deg, var(--color-accent), var(--color-gold));
  border-radius: 50px;
  transition: var(--transition-fast);
}

.modal-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(255, 107, 129, 0.4);
}

/* --------------------------------------------
   Animations (GSAP classes)
-------------------------------------------- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
}

.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
}