/* Global Styles for yamapez.github.io */
:root {
  --color-background: #f5f6fb;
  --color-surface: #ffffff;
  --color-surface-muted: rgba(255, 255, 255, 0.95);
  --color-primary: #3356d8;
  --color-primary-light: #5f7ef0;
  --color-accent: #22c1c3;
  --color-text: #1f2933;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;
  --gradient-background: linear-gradient(180deg, #eef2ff 0%, var(--color-background) 60%, #ffffff 100%);
  --font-base: 'Noto Sans JP', 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 4px 18px rgba(51, 86, 216, 0.1);
  --shadow-lg: 0 24px 60px rgba(28, 44, 128, 0.15);
  --blur-surface: rgba(238, 242, 255, 0.9);
  scroll-behavior: smooth;
}

[data-theme="dark"] {
  --color-background: #0f172a;
  --color-surface: #111b2f;
  --color-surface-muted: rgba(15, 23, 42, 0.92);
  --color-primary: #5c8bff;
  --color-primary-light: #7aa2ff;
  --color-accent: #10b981;
  --color-text: #f8fafc;
  --color-text-muted: rgba(226, 232, 240, 0.76);
  --color-border: rgba(96, 165, 250, 0.25);
  --gradient-background: radial-gradient(circle at top, rgba(45, 63, 146, 0.6), rgba(15, 23, 42, 0.95) 50%, rgba(15, 23, 42, 1) 100%);
  --shadow-sm: 0 10px 30px rgba(12, 20, 37, 0.6);
  --shadow-lg: 0 24px 80px rgba(8, 12, 24, 0.75);
  --blur-surface: rgba(15, 23, 42, 0.85);
}

* {
  box-sizing: border-box;
}

.text-muted {
  color: var(--color-text-muted) !important;
}

.mt-sm { margin-top: 0.75rem !important; }
.mt-md { margin-top: 1.25rem !important; }
.mt-lg { margin-top: 1.75rem !important; }

.align-right {
  text-align: right !important;
}

.stacked-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.stacked-list {
  padding-left: 1.2rem;
  margin: 1rem 0;
}

.form-note {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--gradient-background);
  line-height: 1.6;
  transition: background 0.6s ease, color 0.3s ease;
}

a {
  color: inherit;
}

a:hover {
  color: var(--color-primary);
}

.container {
  width: min(1080px, 90vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  background: var(--blur-surface);
  border-bottom: 1px solid rgba(51, 86, 216, 0.08);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 0;
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-primary);
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  font-size: 0.98rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  position: relative;
  padding: 0.2rem 0;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.3rem;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a:focus::after {
  transform: scaleX(1);
}

.button-primary,
.button-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.button-primary {
  color: #fff;
  background: linear-gradient(120deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  box-shadow: var(--shadow-sm);
}

.button-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.button-secondary {
  color: var(--color-primary);
  background: rgba(51, 86, 216, 0.12);
}

.hero {
  padding: clamp(3rem, 8vw, 6rem) 0;
}

.hero-content {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(2.4rem, 6vw, 3.4rem);
  margin: 0;
  line-height: 1.2;
}

.hero-text p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin: 1.5rem 0 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.hero-card {
  background: var(--color-surface);
  padding: 1.8rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 360px;
  justify-self: center;
}

.hero-card h3 {
  margin-top: 0;
  margin-bottom: 0.8rem;
}

.hero-card p {
  margin: 0;
  color: var(--color-text-muted);
}

.section {
  padding: clamp(3rem, 8vw, 5rem) 0;
}

.section-header {
  margin-bottom: 2rem;
}

.section-title {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.4rem;
}

.section-title span {
  font-size: 1.6rem;
}

.section-description {
  margin-top: 0.6rem;
  color: var(--color-text-muted);
}

.card-grid {
  display: grid;
  gap: 1.6rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card-grid[data-loading="true"],
.timeline[data-loading="true"] {
  position: relative;
  min-height: 160px;
}

.card {
  background: var(--color-surface);
  padding: 1.6rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid rgba(51, 86, 216, 0.08);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card .tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 1.5rem;
}

.card .tag {
  font-size: 0.8rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: rgba(51, 86, 216, 0.12);
  color: var(--color-primary);
  font-weight: 600;
}

.blog-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.blog-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.blog-tag {
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: rgba(51, 86, 216, 0.16);
  color: var(--color-primary);
  font-weight: 600;
}

.contact-hero {
  padding: clamp(4rem, 9vw, 6rem) 0 2rem;
  text-align: center;
}

.contact-hero h1 {
  margin-bottom: 0.8rem;
}

.contact-hero p {
  max-width: 640px;
  margin: 0 auto;
  color: var(--color-text-muted);
}

.contact-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  margin-top: 2rem;
}

.contact-card {
  background: var(--color-surface);
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(51, 86, 216, 0.15);
}

.contact-card h2 {
  margin-top: 0;
}

.contact-form {
  display: grid;
  gap: 1rem;
}

.contact-form label {
  text-align: left;
  font-weight: 600;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
  background: var(--color-surface-muted);
  color: var(--color-text);
  font-size: 1rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

[data-theme="dark"] .contact-form input,
[data-theme="dark"] .contact-form textarea {
  border-color: rgba(92, 139, 255, 0.2);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(51, 86, 216, 0.2);
}

.contact-form textarea {
  min-height: 160px;
  resize: vertical;
}

.contact-form button {
  justify-self: flex-start;
}

.timeline {
  display: grid;
  gap: 1.2rem;
}

.timeline-item {
  display: grid;
  gap: 0.4rem;
  padding: 1.4rem;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-primary);
}

.timeline-item time {
  font-weight: 600;
  color: var(--color-primary);
}

.status-message {
  margin: 1rem 0 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.status-message::before {
  content: "⏳";
  margin-right: 0.4rem;
}

.status-message[aria-live="assertive"]::before {
  content: "⚠️";
}

.badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.badge {
  padding: 0.4rem 1rem;
  border-radius: 999px;
  font-size: 0.9rem;
  color: #fff;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.badge-html { background: #e34c26; }
.badge-css { background: #2965f1; }
.badge-js { background: #f0db4f; color: #222; }
.badge-git { background: #f34f29; }
.badge-github { background: #24292f; }
.badge-react { background: #61dafb; color: #0c3c50; }
.badge-node { background: #68a063; }

.link-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
}

.link-card {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1.2rem;
  border-radius: var(--radius-md);
  color: var(--color-text);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(51, 86, 216, 0.1);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .link-card {
  background: rgba(17, 27, 47, 0.85);
  border-color: rgba(92, 139, 255, 0.2);
}
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid rgba(51, 86, 216, 0.25);
  background: rgba(51, 86, 216, 0.08);
  color: var(--color-primary);
  cursor: pointer;
  transition: transform 0.3s ease, background 0.3s ease;
}

.theme-toggle:hover {
  transform: translateY(-2px);
  background: rgba(51, 86, 216, 0.16);
}

[data-theme="dark"] .theme-toggle {
  border-color: rgba(92, 139, 255, 0.4);
  background: rgba(92, 139, 255, 0.18);
  color: #cbd5f5;
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.link-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.site-footer {
  text-align: center;
  padding: 2.5rem 0 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.site-footer .menu {
  margin-bottom: 1rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.site-footer a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--color-primary);
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .navbar-actions {
    gap: 0.6rem;
  }

  .hero-card {
    order: -1;
  }

  .hero-actions {
    justify-content: center;
  }

  .timeline-item {
    border-left: none;
    border-top: 4px solid var(--color-primary);
  }

  .site-footer .menu {
    flex-direction: column;
    gap: 0.6rem;
  }
}