:root {
            --bg: #0f172a;
            --bg-card: #1e293b;
            --bg-card-hover: #263348;
            --accent: #38bdf8;
            --accent2: #818cf8;
            --accent3: #f472b6;
            --accent4: #34d399;
            --text: #f1f5f9;
            --text-dim: #94a3b8;
            --border: #334155;
            --radius: 16px;
            --shadow: 0 4px 24px rgba(0,0,0,.25);
        }
        * { margin:0; padding:0; box-sizing:border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Inter', system-ui, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* ── Hero Section ── */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 20% 50%, rgba(56,189,248,.15) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(129,140,248,.15) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(244,114,182,.1) 0%, transparent 50%);
            z-index: 0;
        }
        .hero-content { position: relative; z-index: 1; padding: 2rem; }
        .hero h1 {
            font-family: 'Playfair Display', serif;
            font-size: clamp(2.5rem, 7vw, 5rem);
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent), var(--accent2), var(--accent3));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: .5rem;
            animation: fadeInUp .8s ease-out;
        }
        .hero .subtitle {
            font-size: clamp(1.1rem, 2.5vw, 1.4rem);
            color: var(--text-dim);
            font-weight: 300;
            letter-spacing: .05em;
            animation: fadeInUp .8s ease-out .2s both;
        }
        .hero .date-badge {
            display: inline-block;
            margin-top: 1.5rem;
            padding: .6rem 2rem;
            border: 1px solid var(--border);
            border-radius: 50px;
            font-size: .95rem;
            color: var(--accent);
            backdrop-filter: blur(8px);
            background: rgba(56,189,248,.05);
            animation: fadeInUp .8s ease-out .4s both;
        }
        .hero .route-visual {
            margin-top: 2.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            flex-wrap: wrap;
            animation: fadeInUp .8s ease-out .6s both;
        }
        .route-city {
            font-size: 1.3rem;
            font-weight: 700;
            padding: .4rem 1.2rem;
            border-radius: 12px;
            white-space: nowrap;
        }
        .route-city.sea { background: rgba(56,189,248,.15); color: var(--accent); }
        .route-city.pit { background: rgba(52,211,153,.15); color: var(--accent4); }
        .route-city.dc { background: rgba(129,140,248,.15); color: var(--accent2); }
        .route-arrow { font-size: 1.5rem; color: var(--text-dim); }
        .scroll-hint {
            position: absolute;
            bottom: 2rem;
            left: 50%;
            transform: translateX(-50%);
            animation: bounce 2s infinite;
            color: var(--text-dim);
            font-size: 1.5rem;
            cursor: pointer;
            z-index: 1;
        }

        /* ── Plan Switcher ── */
        .plan-switcher {
            position: fixed;
            top: 0; left: 0; right: 0;
            z-index: 130;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: .4rem;
            padding: .5rem;
            background: rgba(15,23,42,.9);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
        }
        .plan-switch-btn {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            border: 1px solid var(--border);
            background: var(--bg-card);
            color: var(--text-dim);
            font-family: inherit;
            font-size: .8rem;
            font-weight: 600;
            padding: .4rem .9rem;
            border-radius: 999px;
            cursor: pointer;
            transition: all .2s;
            white-space: nowrap;
        }
        .plan-switch-btn:hover { color: var(--text); border-color: var(--accent); }
        .plan-switch-btn.active {
            color: #fff;
            border-color: transparent;
            background: linear-gradient(135deg, var(--accent), var(--accent2));
            box-shadow: 0 2px 12px rgba(56,189,248,.35);
        }
        .plan-view { display: none; }
        .plan-view.active { display: block; }

        /* ── Navigation ── */
        nav {
            position: fixed;
            top: 46px;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(15,23,42,.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transform: translateY(-100%);
            transition: transform .3s ease;
        }
        nav.visible { transform: translateY(0); }
        nav .nav-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: .8rem 1.5rem;
            display: flex;
            align-items: center;
            gap: 1rem;
            overflow-x: auto;
            scrollbar-width: none;
        }
        nav .nav-inner::-webkit-scrollbar { display: none; }
        nav a {
            color: var(--text-dim);
            text-decoration: none;
            font-size: .85rem;
            font-weight: 500;
            white-space: nowrap;
            padding: .4rem .8rem;
            border-radius: 8px;
            transition: all .2s;
        }
        nav a:hover, nav a.active {
            color: var(--accent);
            background: rgba(56,189,248,.1);
        }
        nav .nav-logo {
            font-family: 'Playfair Display', serif;
            font-size: 1.1rem;
            color: var(--text);
            margin-right: auto;
            font-weight: 700;
        }

        /* ── Section Container ── */
        .container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        section {
            padding: 5rem 0 3rem;
        }
        .section-header {
            margin-bottom: 3rem;
        }
        .section-tag {
            display: inline-block;
            font-size: .75rem;
            font-weight: 600;
            letter-spacing: .15em;
            text-transform: uppercase;
            padding: .3rem .8rem;
            border-radius: 6px;
            margin-bottom: .8rem;
        }
        .tag-blue { background: rgba(56,189,248,.15); color: var(--accent); }
        .tag-purple { background: rgba(129,140,248,.15); color: var(--accent2); }
        .tag-pink { background: rgba(244,114,182,.15); color: var(--accent3); }
        .tag-green { background: rgba(52,211,153,.15); color: var(--accent4); }
        .tag-red { background: rgba(248,113,113,.15); color: #f87171; }
        .section-title {
            font-family: 'Playfair Display', serif;
            font-size: clamp(1.8rem, 4vw, 2.5rem);
            font-weight: 700;
            margin-bottom: .5rem;
        }
        .section-desc {
            color: var(--text-dim);
            font-size: 1rem;
            max-width: 600px;
        }

        /* ── Timeline Overview ── */
        .timeline {
            position: relative;
            padding-left: 2.5rem;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 10px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, var(--accent), var(--accent2), var(--accent3));
        }
        .tl-item {
            position: relative;
            margin-bottom: 1.5rem;
            padding: 1.2rem 1.5rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: all .3s;
        }
        .tl-item:hover {
            background: var(--bg-card-hover);
            transform: translateX(4px);
        }
        .tl-item::before {
            content: '';
            position: absolute;
            left: -2.15rem;
            top: 1.5rem;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent);
            border: 2px solid var(--bg);
            box-shadow: 0 0 0 3px rgba(56,189,248,.3);
        }
        .tl-item.pit::before { background: var(--accent4); box-shadow: 0 0 0 3px rgba(52,211,153,.3); }
        .tl-item.dc::before { background: var(--accent2); box-shadow: 0 0 0 3px rgba(129,140,248,.3); }
        .tl-date {
            font-size: .8rem;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: .05em;
        }
        .tl-item.pit .tl-date { color: var(--accent4); }
        .tl-item.dc .tl-date { color: var(--accent2); }
        .tl-title { font-weight: 600; font-size: 1.05rem; margin: .3rem 0; }
        .tl-desc { font-size: .9rem; color: var(--text-dim); }

        /* ── Cards Grid ── */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 1.5rem;
        }
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.8rem;
            transition: all .3s;
            position: relative;
            overflow: hidden;
        }
        .card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .card-icon {
            font-size: 2rem;
            margin-bottom: .8rem;
        }
        .card-title {
            font-weight: 700;
            font-size: 1.15rem;
            margin-bottom: .5rem;
        }
        .card-meta {
            font-size: .85rem;
            color: var(--text-dim);
            margin-bottom: .8rem;
        }
        .card-detail {
            font-size: .9rem;
            color: var(--text-dim);
            line-height: 1.7;
        }
        .card-detail strong { color: var(--text); }
        .card-detail a {
            color: var(--accent);
            text-decoration: none;
            border-bottom: 1px solid rgba(56,189,248,.4);
            font-weight: 600;
            transition: color .15s, border-color .15s;
        }
        .card-detail a:hover { color: var(--accent3); border-bottom-color: var(--accent3); }
        .card-detail code, .alert-card code {
            background: rgba(56,189,248,.12);
            color: var(--accent);
            padding: 1px 5px;
            border-radius: 4px;
            font-family: monospace;
            font-size: .82em;
        }
        .card-badge {
            display: inline-block;
            font-size: .7rem;
            font-weight: 600;
            padding: .2rem .6rem;
            border-radius: 4px;
            margin-bottom: .5rem;
        }

        /* ── Info Table ── */
        .info-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            margin-bottom: 1.5rem;
        }
        .info-table th {
            text-align: left;
            padding: .8rem 1.2rem;
            font-size: .75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: .1em;
            color: var(--text-dim);
            background: rgba(255,255,255,.03);
            border-bottom: 1px solid var(--border);
        }
        .info-table td {
            padding: .7rem 1.2rem;
            font-size: .9rem;
            border-bottom: 1px solid var(--border);
        }
        .info-table tr:last-child td { border-bottom: none; }
        .info-table .label {
            color: var(--text-dim);
            font-weight: 500;
            width: 140px;
            white-space: nowrap;
        }

        /* ── Day Itinerary ── */
        .day-tabs {
            display: flex;
            gap: .5rem;
            margin-bottom: 2rem;
            overflow-x: auto;
            padding-bottom: .5rem;
            scrollbar-width: none;
        }
        .day-tabs::-webkit-scrollbar { display: none; }
        .day-tab {
            padding: .6rem 1.2rem;
            border-radius: 12px;
            font-size: .9rem;
            font-weight: 600;
            cursor: pointer;
            border: 1px solid var(--border);
            background: var(--bg-card);
            color: var(--text-dim);
            white-space: nowrap;
            transition: all .2s;
        }
        .day-tab:hover { background: var(--bg-card-hover); color: var(--text); }
        .day-tab.active {
            background: var(--accent2);
            color: #fff;
            border-color: var(--accent2);
        }
        .day-content { display: none; }
        .day-content.active { display: block; }
        .day-schedule-item {
            display: flex;
            gap: 1.2rem;
            padding: 1rem 0;
            border-bottom: 1px solid var(--border);
            align-items: flex-start;
        }
        .day-schedule-item:last-child { border-bottom: none; }
        .ds-time {
            font-size: .85rem;
            font-weight: 600;
            color: var(--accent);
            min-width: 70px;
            white-space: nowrap;
            padding-top: .1rem;
        }
        .ds-info { flex: 1; }
        .ds-title { font-weight: 600; font-size: 1rem; }
        .ds-desc { font-size: .85rem; color: var(--text-dim); margin-top: .2rem; }
        .ds-tag {
            display: inline-block;
            font-size: .7rem;
            font-weight: 600;
            padding: .15rem .5rem;
            border-radius: 4px;
            margin-top: .3rem;
        }

        /* ── Reservation Alert ── */
        .alert-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.2rem;
        }
        .alert-card {
            padding: 1.5rem;
            border-radius: var(--radius);
            border: 1px solid;
            position: relative;
        }
        .alert-card.critical {
            background: rgba(248,113,113,.06);
            border-color: rgba(248,113,113,.3);
        }
        .alert-card.warning {
            background: rgba(251,191,36,.06);
            border-color: rgba(251,191,36,.3);
        }
        .alert-card.info {
            background: rgba(56,189,248,.06);
            border-color: rgba(56,189,248,.3);
        }
        .alert-icon { font-size: 1.5rem; margin-bottom: .5rem; }
        .alert-title { font-weight: 700; font-size: 1rem; margin-bottom: .3rem; }
        .alert-desc { font-size: .85rem; color: var(--text-dim); line-height: 1.6; }
        .alert-action {
            display: inline-block;
            margin-top: .8rem;
            font-size: .8rem;
            font-weight: 600;
            color: var(--accent);
            text-decoration: none;
            padding: .3rem .8rem;
            border: 1px solid var(--accent);
            border-radius: 6px;
            transition: all .2s;
        }
        .alert-action:hover {
            background: var(--accent);
            color: var(--bg);
        }

        /* ── Restaurant Section ── */
        .resto-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.2rem;
        }
        .resto-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.5rem;
            transition: all .3s;
        }
        .resto-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-2px);
        }
        .resto-name { font-weight: 700; font-size: 1.05rem; }
        .resto-cuisine { font-size: .8rem; color: var(--accent2); margin-top: .2rem; }
        .resto-addr { font-size: .82rem; color: var(--text-dim); margin-top: .4rem; }
        .resto-price { margin-top: .5rem; }
        .resto-price span {
            color: #fbbf24;
            font-size: .9rem;
        }
        .resto-walk {
            font-size: .75rem;
            color: var(--text-dim);
            margin-top: .3rem;
        }

        /* ── Checklist ── */
        .checklist {
            list-style: none;
        }
        .checklist li {
            display: flex;
            align-items: flex-start;
            gap: .8rem;
            padding: .8rem 1rem;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: .6rem;
            font-size: .9rem;
            transition: all .2s;
            cursor: pointer;
        }
        .checklist li:hover { background: var(--bg-card-hover); }
        .checklist li.checked {
            opacity: .5;
            text-decoration: line-through;
        }
        .check-box {
            width: 20px;
            height: 20px;
            border: 2px solid var(--border);
            border-radius: 6px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-top: 1px;
            transition: all .2s;
        }
        .checklist li.checked .check-box {
            background: var(--accent4);
            border-color: var(--accent4);
        }
        .checklist li.checked .check-box::after {
            content: '✓';
            color: #fff;
            font-size: .7rem;
            font-weight: 800;
        }
        .check-priority {
            font-size: .7rem;
            font-weight: 600;
            padding: .15rem .5rem;
            border-radius: 4px;
            white-space: nowrap;
        }
        .priority-now { background: rgba(248,113,113,.15); color: #f87171; }
        .priority-july { background: rgba(251,191,36,.15); color: #fbbf24; }
        .priority-before { background: rgba(56,189,248,.15); color: var(--accent); }

        /* ── Budget ── */
        .budget-bar-container {
            margin-bottom: 1rem;
        }
        .budget-label {
            display: flex;
            justify-content: space-between;
            font-size: .9rem;
            margin-bottom: .4rem;
        }
        .budget-bar {
            height: 8px;
            background: var(--border);
            border-radius: 4px;
            overflow: hidden;
        }
        .budget-fill {
            height: 100%;
            border-radius: 4px;
            transition: width 1s ease;
        }

        /* ── Auth Gate ── */
        #authGate {
            position: fixed;
            inset: 0;
            z-index: 9999;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        #authGate.hidden { display: none; }
        .auth-box {
            text-align: center;
            padding: 3rem 2.5rem;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            max-width: 380px;
            width: 90%;
        }
        .auth-box h2 {
            font-family: 'Playfair Display', serif;
            font-size: 1.6rem;
            margin-bottom: .3rem;
        }
        .auth-box p { color: var(--text-dim); font-size: .9rem; margin-bottom: 1.5rem; }
        .auth-input {
            width: 100%;
            padding: .8rem 1rem;
            border: 1px solid var(--border);
            border-radius: 10px;
            background: var(--bg);
            color: var(--text);
            font-size: 1.1rem;
            text-align: center;
            letter-spacing: .3em;
            outline: none;
            transition: border-color .2s;
        }
        .auth-input:focus { border-color: var(--accent); }
        .auth-input.error { border-color: #f87171; animation: shake .4s; }
        .auth-btn {
            width: 100%;
            margin-top: 1rem;
            padding: .8rem;
            border: none;
            border-radius: 10px;
            background: var(--accent2);
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all .2s;
        }
        .auth-btn:hover { background: #6366f1; }
        .auth-btn:disabled { opacity: .5; cursor: wait; }
        .auth-msg {
            margin-top: .8rem;
            font-size: .85rem;
            min-height: 1.2em;
        }
        .auth-msg.error { color: #f87171; }
        .auth-spinner {
            display: inline-block;
            width: 16px; height: 16px;
            border: 2px solid var(--text-dim);
            border-top-color: var(--accent);
            border-radius: 50%;
            animation: spin .6s linear infinite;
            vertical-align: middle;
            margin-right: .4rem;
        }
        @keyframes spin { to { transform: rotate(360deg); } }
        @keyframes shake {
            0%,100% { transform: translateX(0); }
            20%,60% { transform: translateX(-6px); }
            40%,80% { transform: translateX(6px); }
        }
        .gmap-link {
            display: inline-block;
            font-size: .7rem;
            font-weight: 600;
            color: var(--accent4);
            text-decoration: none;
            margin-left: .3rem;
            opacity: .8;
            transition: opacity .2s;
        }
        .gmap-link:hover { opacity: 1; text-decoration: underline; }

        /* ── Footer ── */
        footer {
            text-align: center;
            padding: 3rem 1.5rem;
            border-top: 1px solid var(--border);
            color: var(--text-dim);
            font-size: .85rem;
        }
        footer .heart { color: var(--accent3); }

        /* ── Animations ── */
        @keyframes fadeInUp {
            from { opacity:0; transform: translateY(20px); }
            to { opacity:1; transform: translateY(0); }
        }
        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
            40% { transform: translateX(-50%) translateY(-10px); }
            60% { transform: translateX(-50%) translateY(-5px); }
        }
        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity .6s ease, transform .6s ease;
        }
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ── Responsive ── */
        @media (max-width: 640px) {
            .cards-grid { grid-template-columns: 1fr; }
            .alert-grid { grid-template-columns: 1fr; }
            .resto-grid { grid-template-columns: 1fr; }
            .timeline { padding-left: 2rem; }
            section { padding: 3rem 0 2rem; }
            .day-schedule-item { flex-direction: column; gap: .3rem; }
            .ds-time { min-width: auto; }
        }