:root{--primary-color:#2563eb;--primary-hover:#1d4ed8;--bg-color:#f9fafb;--text-main:#111827;--text-muted:#6b7280;--border-color:#e5e7eb;--bg-surface:#fff;--error-color:#ef4444}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-main);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol;line-height:1.5}.app-container{min-height:100vh;padding:2rem 1rem}.app-content{max-width:800px;margin:0 auto}.app-header{text-align:center;border-bottom:1px solid var(--border-color);margin-bottom:2rem;padding-bottom:1.5rem}.app-header h1{margin-bottom:.5rem;font-size:2rem;font-weight:700}.app-header p{color:var(--text-muted)}.upload-section{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:8px;margin-bottom:2rem;padding:1.5rem}.section-title{margin-bottom:1rem;font-size:1.25rem;font-weight:600}.upload-container{flex-direction:column;align-items:center;display:flex}.error-message{color:var(--error-color);margin-bottom:1rem;font-weight:500}.upload-btn{background-color:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:6px;padding:.5rem 1.5rem;font-size:1rem;transition:background-color .2s}.upload-btn:hover:not(:disabled){background-color:var(--primary-hover)}.upload-btn:disabled{opacity:.6;cursor:not-allowed}.hidden-input{display:none}.gallery-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1.5rem;display:grid}.photo-card{border:1px solid var(--border-color);background-color:var(--bg-surface);border-radius:8px;padding:.5rem;overflow:hidden}.photo-image{object-fit:cover;border-radius:4px;width:100%;height:200px;margin-bottom:.5rem}.photo-time{color:var(--text-muted);font-size:.875rem}.empty-state{color:var(--text-muted);text-align:center;padding:2rem 0}