/* Home page styles extracted from inline <style> */

.hero-section {
  text-align: center;
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, rgba(34, 197, 94, 0.05), rgba(59, 130, 246, 0.05));
  z-index: -1;
}

.hero-title {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: floatY 8s ease-in-out infinite;
}

@keyframes floatY { 0%,100% { transform: translateY(0) } 50% { transform: translateY(-6px) } }

.hero-subtitle {
  font-size: 1.3rem;
  color: var(--text-muted);
  margin-bottom: 3rem;
}

.profile-section { padding: 3rem 0; }
.profile-image-container { text-align: center; }

.profile-image {
  width: 250px;
  height: 250px;
  border-radius: 50%;
  border: 4px solid var(--accent-green);
  transition: transform 0.3s ease;
  position: relative;
  animation: bob 8s ease-in-out infinite;
}

.profile-image:hover { transform: scale(1.03); }

.profile-image::before {
  content: '';
  position: absolute;
  top: -10px; left: -10px; right: -10px; bottom: -10px;
  border: 1px dashed var(--border-color);
  border-radius: 50%;
  animation: rotate 20s linear infinite;
  opacity: 0.5;
}

@keyframes rotate { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes bob { 0%,100% { transform: translateY(0) } 50% { transform: translateY(-8px) } }

.profile-info { padding: 2rem; }
.profile-info h2 { font-size: 2.5rem; margin-bottom: 1.5rem; color: var(--accent-green); }
.profile-info p { font-size: 1.1rem; line-height: 1.8; margin-bottom: 1.5rem; color: var(--text-primary); }

.skills-section { padding: 3rem 0; background: var(--bg-secondary); margin: 3rem 0; border-radius: 15px; }
.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; max-width: 800px; margin: 0 auto; }
.skill-card { background: var(--bg-tertiary); border: 1px solid var(--border-color); border-radius: 10px; padding: 1.5rem; text-align: center; position: relative; overflow: hidden; will-change: transform, box-shadow; }
.skill-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: linear-gradient(90deg, var(--accent-green), var(--accent-blue)); transform: scaleX(0); transition: transform 0.3s ease; }
.skill-card:hover::before { transform: scaleX(1); }
.skill-card:hover { transform: translateY(-3px); border-color: var(--accent-green); }
.skill-icon { font-size: 2.5rem; margin-bottom: 1rem; animation: floatY 7s ease-in-out infinite; }
.skill-name { font-size: 1.2rem; color: var(--accent-green); margin-bottom: 0.5rem; }
.skill-description { color: var(--text-muted); font-size: 0.9rem; }

.apps-section { padding: 3rem 0; background: var(--bg-secondary); margin: 3rem 0; border-radius: 15px; }
.apps-cta { text-align:center; margin-top:1.5rem; }

.cta-section { text-align: center; padding: 3rem 0; }
.cta-buttons { display: flex; gap: 2rem; justify-content: center; flex-wrap: wrap; margin-top: 2rem; }

/* Modal */
.modal-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,.45); display: none; align-items: flex-start; justify-content: center; z-index: 999; padding: clamp(16px, env(safe-area-inset-top) + 72px, 96px) 1rem 1rem; }
.modal-backdrop.show { display: flex; }
.modal { width: min(900px, 100%); max-height: 85vh; background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: 14px; padding: 1.5rem; box-shadow: 0 20px 50px rgba(0,0,0,.35); position: relative; animation: modal-pop .18s ease-out; overflow: hidden; display: flex; flex-direction: column; max-height: 90dvh; margin-top: 0; }
.modal-body { flex: 1; overflow: auto; -webkit-overflow-scrolling: touch; padding: 0 .25rem .75rem; }
@keyframes modal-pop { from { transform: translateY(6px) scale(.98); opacity: .6 } to { transform: translateY(0) scale(1); opacity: 1 } }
.modal-close { position: absolute; top: .9rem; right: 1rem; border: none; background: transparent; font-size: 1.6rem; line-height: 1; color: var(--text-muted); cursor: pointer; }
.modal-close:hover { color: var(--accent-green); }
.modal-header { position: sticky; top: 0; display: flex; align-items: center; justify-content: center; gap: .5rem; background: var(--bg-primary); margin: -1.5rem -1.5rem 0 -1.5rem; padding: 1rem 2.25rem; border-bottom: 1px solid var(--border-color); z-index: 1; }
.modal-header h3 { margin: 0; text-align: center; font-size: 1.15rem; }
.app-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem; margin-top: 1rem; padding-right: .25rem; align-content: start; }
.app-card { background: var(--bg-tertiary); border: 1px solid var(--border-color); border-radius: 12px; padding: 1.25rem; position: relative; overflow: hidden; transition: transform .25s ease, border-color .3s ease; height: auto; }
.app-card:hover { transform: translateY(-3px); border-color: var(--accent-green); }
.app-card::before { content: ''; position: absolute; inset: 0; border-radius: 12px; pointer-events: none; background: linear-gradient(135deg, rgba(34,197,94,.06), rgba(59,130,246,.04)); opacity: 1; }
.app-title { font-size: 1.25rem; color: var(--accent-green); margin-bottom: .5rem; font-weight: 700; letter-spacing: .2px; }
.app-desc { color: var(--text-muted); margin-bottom: 1rem; font-size: .98rem; }
.app-links { display: flex; gap: .6rem; flex-wrap: wrap; row-gap: .5rem; }
.badge { display: inline-block; padding: .35rem .6rem; border: 1px solid var(--border-color); border-radius: 999px; font-size: .85rem; color: var(--text-muted); }

/* Page fade-in and reveal */
body { opacity: 0; animation: page-fade-in .6s ease both; }
@keyframes page-fade-in { from { opacity: 0 } to { opacity: 1 } }
.reveal { opacity: 0; transform: translateY(24px); }
.reveal.in { opacity: 1; transform: translateY(0); transition: opacity .8s ease, transform .8s ease; transition-delay: var(--d, 0s); }

/* Nav link underline */
.nav-menu a { position: relative; display: inline-block; overflow: hidden; text-decoration: none; }
.nav-menu a::after { content: ''; position: absolute; left: 0; bottom: 0; height: 2px; width: 100%; background: linear-gradient(90deg, var(--accent-green), var(--accent-blue)); transform: scaleX(0); transform-origin: left; transition: transform .28s ease; }
.nav-menu a:hover::after, .nav-menu a.active::after { transform: scaleX(1); }

/* 返回顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 56px;
  height: 56px;
  background: var(--bg-primary);
  border: 2px solid var(--accent-green);
  border-radius: 50%;
  color: var(--accent-green);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease, visibility 0.3s ease, background 0.2s ease, color 0.2s ease;
  z-index: 1000;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.back-to-top:hover {
  background: var(--accent-green);
  color: var(--bg-primary);
  transform: translateY(-2px) scale(1.05);
  border-color: var(--accent-green);
}

.back-to-top:active {
  transform: translateY(0) scale(0.95);
}

.back-to-top svg {
  transition: transform 0.2s ease;
}

.back-to-top:hover svg {
  transform: translateY(-2px);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .back-to-top {
    bottom: 1.5rem;
    right: 1.5rem;
    width: 48px;
    height: 48px;
  }
  
  .back-to-top svg {
    width: 20px;
    height: 20px;
  }
}

@media (max-width: 480px) {
  .back-to-top {
    bottom: 1rem;
    right: 1rem;
    width: 44px;
    height: 44px;
  }
  
  .back-to-top svg {
    width: 18px;
    height: 18px;
  }
}

/* Responsive */
@media (max-width: 768px) {
  .profile-image { width: 200px; height: 200px; }
  .hero-title { font-size: 2.5rem; }
  .hero-subtitle { font-size: 1.1rem; }
  .skills-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1rem; }
  .cta-buttons { flex-direction: column; align-items: center; }
  .cta-buttons .btn { width: 100%; max-width: 300px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2rem; }
  .profile-image { width: 150px; height: 150px; }
  .skills-grid { grid-template-columns: 1fr; }
}