/* ===================================
   NeuroGlint - Style Sheet
   Modern, Green × Orange Gradient
   =================================== */

/* --- CSS Variables --- */
:root {
  /* Colors */
  --color-green-dark: #1a4d3a;
  --color-green: #2D6A4F;
  --color-green-light: #40916C;
  --color-orange: #F4A261;
  --color-orange-light: #F6B879;
  --color-white: #FFFFFF;
  --color-bg: #FAFAFA;
  --color-bg-alt: #F0F0F0;
  --color-text: #2C2C2C;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  
  /* Gradients */
  --gradient-main: linear-gradient(135deg, var(--color-green) 0%, var(--color-orange) 100%);
  --gradient-subtle: linear-gradient(135deg, var(--color-green-light) 0%, var(--color-orange-light) 100%);
  
  /* Typography */
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Noto Sans JP', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul, ol {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.3;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
}

p {
  margin-bottom: 1em;
}

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

/* --- Layout --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
}

.section--alt {
  background-color: var(--color-white);
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: transform var(--transition-base);
}

.header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.header__logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header__nav {
  display: flex;
  gap: var(--spacing-md);
}

.header__nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-light);
  position: relative;
  padding: var(--spacing-xs) 0;
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-main);
  transition: width var(--transition-base);
}

.header__nav-link:hover {
  color: var(--color-text);
}

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

/* Mobile Menu Button */
.header__menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
}

.header__menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  transition: var(--transition-base);
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: var(--color-white);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 80%;
  height: 150%;
  background: var(--gradient-subtle);
  opacity: 0.15;
  border-radius: 50%;
  filter: blur(80px);
}

.hero__content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero__catchphrase {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease forwards;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease 0.2s forwards;
}

.hero__scroll {
  position: absolute;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  opacity: 0;
  animation: fadeIn 1s ease 0.6s forwards;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: var(--gradient-main);
  animation: scrollLine 1.5s ease-in-out infinite;
}

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

.section__title {
  display: inline-block;
  position: relative;
  margin-bottom: var(--spacing-sm);
}

.section__title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--gradient-main);
  border-radius: var(--radius-full);
}

.section__subtitle {
  color: var(--color-text-light);
  font-size: 1rem;
}

/* --- Cards --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.card__image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: var(--color-bg-alt);
}

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

.card__tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--gradient-main);
  color: var(--color-white);
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-sm);
}

.card__title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
}

.card__text {
  color: var(--color-text-light);
  font-size: 0.9rem;
}

.card__meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
  padding-top: var(--spacing-sm);
  border-top: 1px solid var(--color-bg-alt);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 14px 32px;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn--primary {
  background: var(--gradient-main);
  color: var(--color-white);
  box-shadow: 0 4px 16px rgba(45, 106, 79, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(45, 106, 79, 0.4);
}

.btn--outline {
  background: transparent;
  color: var(--color-green);
  border: 2px solid var(--color-green);
}

.btn--outline:hover {
  background: var(--color-green);
  color: var(--color-white);
}

/* --- Skills Grid --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--spacing-sm);
}

.skill-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md);
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base);
}

.skill-item:hover {
  transform: translateY(-4px);
}

.skill-item__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-subtle);
  border-radius: var(--radius-md);
  color: var(--color-white);
  font-size: 1.5rem;
}

.skill-item__name {
  font-size: 0.85rem;
  font-weight: 500;
  text-align: center;
}

/* --- Profile --- */
.profile {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.profile__section {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.profile__section-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-bg-alt);
}

.profile__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.profile__list-item {
  padding: 8px 16px;
  background: var(--color-bg);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
}

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

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.footer__logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer__nav {
  display: flex;
  gap: var(--spacing-md);
}

.footer__nav-link {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.footer__nav-link:hover {
  color: var(--color-white);
}

.footer__copyright {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  color: var(--color-text-light);
}

.empty-state__icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.3;
}

.empty-state__text {
  font-size: 1.1rem;
}

/* --- Page Header --- */
.page-header {
  padding-top: calc(72px + var(--spacing-xl));
  padding-bottom: var(--spacing-lg);
  background: var(--color-white);
  text-align: center;
}

.page-header__title {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
}

.page-header__subtitle {
  color: var(--color-text-light);
}

/* --- Blog Article --- */
.article {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
}

.article__header {
  margin-bottom: var(--spacing-lg);
}

.article__title {
  margin-bottom: var(--spacing-sm);
}

.article__meta {
  display: flex;
  gap: var(--spacing-md);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.article__content {
  line-height: 2;
}

.article__content h2 {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.article__content h3 {
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.article__content p {
  margin-bottom: var(--spacing-md);
}

.article__content code {
  background: var(--color-bg-alt);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
}

.article__content pre {
  background: var(--color-text);
  color: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

.article__content pre code {
  background: none;
  padding: 0;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes scrollLine {
  0% {
    transform: scaleY(0);
    transform-origin: top;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
  }
  50.1% {
    transform-origin: bottom;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
  }
}

/* Scroll Animation Classes */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.fade-in-delay-1 {
  transition-delay: 0.1s;
}

.fade-in-delay-2 {
  transition-delay: 0.2s;
}

.fade-in-delay-3 {
  transition-delay: 0.3s;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
  }
  
  .header__nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-white);
    padding: var(--spacing-md);
    gap: 0;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    border-bottom: 1px solid var(--color-bg-alt);
  }
  
  .header__nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .header__nav-link {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-bg-alt);
  }
  
  .header__menu-btn {
    display: flex;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .profile__list-item {
    font-size: 0.8rem;
    padding: 6px 12px;
  }
}

.hero-subtitle {
  font-family: 'Outfit', sans-serif;
  font-size: 1.4rem;
  letter-spacing: 0.15em;
  color: #F4A261;
  margin-top: -0.5rem;
  margin-bottom: 2rem;
}