:root{--primary:#3b82f6;--primary-hover:#2563eb;--bg:#f8fafc;--card-bg:#fff;--text:#1e293b;--text-muted:#64748b;--border:#e2e8f0;--radius:12px;--shadow:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a}[data-theme=dark]{--primary:#3b82f6;--primary-hover:#2563eb;--bg:#000;--card-bg:#121212;--text:#fff;--text-muted:#a0a0a0;--border:#262626;--shadow:0 4px 6px -1px #ffffff0d, 0 2px 4px -2px #ffffff0d}[data-theme=dark] input[type=date]::-webkit-calendar-picker-indicator{filter:invert()}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--primary:#3b82f6;--primary-hover:#2563eb;--bg:#000;--card-bg:#121212;--text:#fff;--text-muted:#a0a0a0;--border:#262626;--shadow:0 4px 6px -1px #ffffff0d, 0 2px 4px -2px #ffffff0d}:root:not([data-theme=light]) input[type=date]::-webkit-calendar-picker-indicator{filter:invert()}}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5}a{color:inherit;text-decoration:none}button{cursor:pointer;font:inherit;background:0 0;border:none}.container{width:100%;max-width:1000px;margin:0 auto;padding:1rem}@media (width>=640px){.container{padding:2rem}}header{background:var(--card-bg);border-bottom:1px solid var(--border);z-index:100;padding:.75rem 0;position:sticky;top:0}.header-content{justify-content:space-between;align-items:center;max-width:1000px;margin:0 auto;padding:0 1rem;display:flex}@media (width>=640px){.header-content{padding:0 2rem}}h1{color:var(--primary);font-size:1.25rem;font-weight:700}@media (width>=640px){h1{font-size:1.5rem}}.btn{border-radius:var(--radius);white-space:nowrap;justify-content:center;align-items:center;gap:.5rem;padding:.5rem 1rem;font-size:.9rem;font-weight:500;transition:all .2s;display:inline-flex}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-outline{border:1px solid var(--border);color:var(--text);background:var(--card-bg)}.btn-outline:hover{background:var(--bg)}.card{background:var(--card-bg);border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow);padding:1.25rem}.grid{grid-template-columns:1fr;gap:1rem;display:grid}@media (width>=640px){.grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}}.form-group{margin-bottom:1.25rem}.form-group label{margin-bottom:.4rem;font-size:.9rem;font-weight:500;display:block}input,textarea,select{border:1px solid var(--border);border-radius:var(--radius);width:100%;font:inherit;background:var(--card-bg);color:var(--text);padding:.75rem;font-size:1rem}input:focus,textarea:focus,select:focus{outline:2px solid var(--primary);outline-offset:-1px}.animate-spin{animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.trip-preview-header{flex-direction:column;gap:1rem}@media (width>=640px){.trip-preview-header{flex-direction:row}}.nav-user-email{display:none}@media (width>=640px){.nav-user-email{display:inline}}