:root{--color-primary: #3b82f6;--color-primary-dark: #2563eb;--color-secondary: #64748b;--color-success: #22c55e;--color-error: #ef4444;--color-warning: #f59e0b;--color-background: #ffffff;--color-surface: #f8fafc;--color-text: #1e293b;--color-text-secondary: #64748b;--color-border: #e2e8f0;--font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--border-radius: 8px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1);--transition: .15s ease-in-out}@media(prefers-color-scheme:dark){:root{--color-background: #0f172a;--color-surface: #1e293b;--color-text: #f1f5f9;--color-text-secondary: #94a3b8;--color-border: #334155}}*,*:before,*:after{box-sizing:border-box}html{font-size:16px;line-height:1.5}body{margin:0;padding:0;font-family:var(--font-family);background-color:var(--color-background);color:var(--color-text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:var(--color-primary);text-decoration:none;transition:color var(--transition)}a:hover{color:var(--color-primary-dark)}button{font-family:inherit;cursor:pointer;border:none;border-radius:var(--border-radius);padding:.5rem 1rem;font-size:.875rem;font-weight:500;transition:all var(--transition)}button:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}h1,h2,h3,h4,h5,h6{margin:0;font-weight:600;line-height:1.25}p{margin:0}#root{min-height:100vh;display:flex;flex-direction:column}.layout{display:flex;flex-direction:column;min-height:100vh}.header{background-color:var(--color-surface);border-bottom:1px solid var(--color-border);padding:1rem 0;position:sticky;top:0;z-index:100}.header-content{max-width:1200px;margin:0 auto;padding:0 1.5rem;display:flex;justify-content:space-between;align-items:center}.logo{font-size:1.5rem;font-weight:700;color:var(--color-text)}.logo:hover{color:var(--color-primary)}.nav{display:flex;gap:1.5rem}.nav-link{color:var(--color-text-secondary);font-weight:500}.nav-link:hover,.nav-link.active{color:var(--color-primary)}.main{flex:1;max-width:1200px;width:100%;margin:0 auto;padding:2rem 1.5rem}.footer{background-color:var(--color-surface);border-top:1px solid var(--color-border);padding:1.5rem;text-align:center;color:var(--color-text-secondary);font-size:.875rem}.loading-spinner{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem}.spinner{width:40px;height:40px;border:3px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin 1s linear infinite}.loading-spinner.small .spinner{width:24px;height:24px}.loading-spinner.large .spinner{width:56px;height:56px}.loading-message{margin-top:1rem;color:var(--color-text-secondary)}@keyframes spin{to{transform:rotate(360deg)}}.error-message{background-color:#fef2f2;border:1px solid #fecaca;border-radius:var(--border-radius);padding:1.5rem;text-align:center}@media(prefers-color-scheme:dark){.error-message{background-color:#450a0a;border-color:#7f1d1d}}.error-text{color:var(--color-error);margin-bottom:1rem}.retry-button{background-color:var(--color-primary);color:#fff}.retry-button:hover{background-color:var(--color-primary-dark)}.trip-card{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--border-radius);padding:1.5rem;box-shadow:var(--shadow-sm);transition:box-shadow var(--transition)}.trip-card:hover{box-shadow:var(--shadow-md)}.trip-card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:.75rem}.trip-card-title{font-size:1.25rem;color:var(--color-text)}.trip-card-description{color:var(--color-text-secondary);margin-bottom:1rem;font-size:.875rem}.trip-card-dates{display:flex;gap:1rem;font-size:.875rem;color:var(--color-text-secondary);margin-bottom:1rem}.trip-card-link{display:inline-block;padding:.5rem 1rem;background-color:var(--color-primary);color:#fff;border-radius:var(--border-radius);font-size:.875rem;font-weight:500}.trip-card-link:hover{background-color:var(--color-primary-dark);color:#fff}.delete-button{background-color:transparent;color:var(--color-error);padding:.25rem .5rem;font-size:.75rem}.delete-button:hover{background-color:#fef2f2}@media(prefers-color-scheme:dark){.delete-button:hover{background-color:#450a0a}}.home-page{text-align:center}.hero{padding:4rem 0}.hero h1{font-size:2.5rem;margin-bottom:1rem}.hero p{font-size:1.25rem;color:var(--color-text-secondary);margin-bottom:2rem}.cta-button{display:inline-block;padding:.75rem 2rem;background-color:var(--color-primary);color:#fff;border-radius:var(--border-radius);font-size:1rem;font-weight:600}.cta-button:hover{background-color:var(--color-primary-dark);color:#fff}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;padding:2rem 0}.feature{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--border-radius);padding:2rem;text-align:center}.feature h3{margin-bottom:.75rem;color:var(--color-text)}.feature p{color:var(--color-text-secondary);font-size:.875rem}.trips-page{width:100%}.page-header{margin-bottom:2rem}.page-header h1{font-size:2rem}.trips-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}.empty-state{text-align:center;padding:3rem;background-color:var(--color-surface);border:1px dashed var(--color-border);border-radius:var(--border-radius);color:var(--color-text-secondary)}.not-found-page{text-align:center;padding:4rem 0}.not-found-page h1{font-size:6rem;color:var(--color-primary);margin-bottom:.5rem}.not-found-page h2{font-size:1.5rem;margin-bottom:1rem}.not-found-page p{color:var(--color-text-secondary);margin-bottom:2rem}.home-link{display:inline-block;padding:.75rem 1.5rem;background-color:var(--color-primary);color:#fff;border-radius:var(--border-radius);font-weight:500}.home-link:hover{background-color:var(--color-primary-dark);color:#fff}