:root {
            --bg-soft: #F0F2F5;
            --orange: #FF6B35;
            --neon: #39FF14;
            --slate: #2B2D42;
            --white: #FFFFFF;
            --font-main: 'Roboto Slab', serif;
            --font-mono: 'Fira Code', monospace;
            --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
            --shadow-sm: 0 4px 6px rgba(0,0,0,0.05);
            --shadow-lg: 0 20px 40px rgba(0,0,0,0.1);
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body { 
            background-color: var(--bg-soft); 
            color: var(--slate); 
            font-family: var(--font-main); 
            overflow-x: hidden;
            line-height: 1.8;
        }

        /* --- NAVIGATION --- */
        header {
            position: fixed; top: 0; width: 100%; z-index: 1000;
            background: rgba(240, 242, 245, 0.95); 
            backdrop-filter: blur(10px);
            padding: 15px 5%;
            display: flex; align-items: center; justify-content: space-between;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        header.scrolled { padding: 10px 5%; box-shadow: var(--shadow-lg); }
        
.logo {
    display: flex;
    align-items: center;
    cursor: pointer;
    text-decoration: none;
    color: var(--slate);
}

.logo span {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.4rem;
    margin-left: 10px;
}

.logo svg{
    transition:0.3s;
}

.logo:hover svg{
    transform:rotate(5deg) scale(1.05);
    filter:drop-shadow(0 0 8px var(--neon));
}

        nav ul { display: flex; list-style: none; gap: 25px; }
        nav ul li a { 
            text-decoration: none; color: var(--slate); font-weight: 500; font-size: 0.9rem;
            transition: var(--transition); position: relative;
        }
        nav ul li a:hover { color: var(--orange); }
        nav ul li a::after {
            content: ''; position: absolute; bottom: -5px; left: 0; width: 0;
            height: 2px; background: var(--neon); transition: var(--transition);
        }
        nav ul li a:hover::after { width: 100%; box-shadow: 0 0 8px var(--neon); }

        .auth-actions { display: flex; align-items: center; gap: 15px; }
        .btn-subscribe { 
            background: var(--orange); color: white; border: none; padding: 10px 22px;
            border-radius: 50px; font-weight: 700; cursor: pointer; transition: var(--transition);
        }
        .btn-subscribe:hover { box-shadow: 0 0 20px rgba(255, 107, 53, 0.5); transform: translateY(-2px); }

        /* --- PAGE SYSTEM --- */
        .page { display: none; min-height: 100vh; padding-top: 80px; }
        .page.active { display: block; animation: pageFade 0.6s ease; }
        @keyframes pageFade { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } }

        /* --- HERO --- */
        .hero {
            height: 100vh; display: flex; align-items: center; justify-content: center;
            background: radial-gradient(circle at top right, #e2e8f0, var(--bg-soft));
            position: relative; overflow: hidden; margin-top: -80px;
        }
        .hero-icons { position: absolute; inset: 0; pointer-events: none; z-index: 1; }
        .hero-content { position: relative; z-index: 2; text-align: center; max-width: 1000px; padding: 0 30px; }
        .hero h1 { font-size: 5rem; line-height: 1.1; margin-bottom: 25px; color: var(--slate); }
        .hero p { font-size: 1.5rem; color: #555; margin-bottom: 45px; max-width: 800px; margin-inline: auto; }

        /* --- REVEAL ANIMATIONS --- */
        .reveal { opacity: 0; transform: translateY(40px); transition: 0.8s ease-out; }
        .reveal.active { opacity: 1; transform: translateY(0); }

        /* --- SECTIONS --- */
        .section { padding: 120px 8%; }
        .section-dark { background: var(--slate); color: var(--white); }
        .section-alt { background: var(--white); }
        .section-orange { background: var(--orange); color: var(--white); }

        .flex-split { display: flex; align-items: center; gap: 80px; margin-bottom: 120px; }
        .flex-split.reverse { flex-direction: row-reverse; }
        .flex-split > div { flex: 1; }
        .flex-split img { width: 100%; border-radius: 24px; box-shadow: var(--shadow-lg); transition: var(--transition); }
        .flex-split img:hover { transform: scale(1.02); }

        /* --- CARDS --- */
        .grid { display: grid; gap: 35px; }
        .grid-3 { grid-template-columns: repeat(3, 1fr); }
        .card { 
            background: var(--white); padding: 45px; border-radius: 20px; 
            box-shadow: var(--shadow-sm); transition: var(--transition); color: var(--slate);
            border-top: 5px solid transparent; display: flex; flex-direction: column;
        }
        .card:hover { transform: translateY(-12px); box-shadow: var(--shadow-lg); border-top-color: var(--neon); }
        .card i { margin-bottom: 20px; color: var(--orange); }
        .card h3 { font-size: 1.6rem; margin-bottom: 15px; }
        .card p { color: #666; flex-grow: 1; margin-bottom: 25px; font-size: 0.95rem; }

        /* --- AUTH PAGES --- */
        .auth-box { 
            max-width: 450px; margin: 100px auto; background: white; padding: 50px; 
            border-radius: 25px; box-shadow: var(--shadow-lg); 
        }
        .form-group { margin-bottom: 20px; }
        .form-group label { display: block; margin-bottom: 8px; font-size: 0.8rem; font-weight: 700; color: #888; text-transform: uppercase; }
        .form-group input { 
            width: 100%; padding: 15px; border: 2px solid #eee; border-radius: 10px; 
            font-family: var(--font-mono); transition: var(--transition);
        }
        .form-group input:focus { outline: none; border-color: var(--orange); }

        /* --- CHECKLIST --- */
        .checklist { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
        .check-card { 
            background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
            padding: 30px; border-radius: 15px; display: flex; gap: 20px; cursor: pointer; transition: var(--transition);
        }
        .check-card:hover { background: rgba(255,255,255,0.08); transform: scale(1.02); }
        .check-card.done { border-color: var(--neon); background: rgba(57, 255, 20, 0.05); }
        .check-indicator { 
            width: 28px; height: 28px; border: 2px solid #555; border-radius: 6px; 
            display: flex; align-items: center; justify-content: center;
        }
        .done .check-indicator { background: var(--neon); border-color: var(--neon); color: var(--slate); }

        /* --- BUTTONS --- */
        .btn { 
            padding: 16px 36px; border-radius: 50px; font-weight: 700; text-transform: uppercase; 
            cursor: pointer; border: none; transition: var(--transition); text-decoration: none; 
            display: inline-block; text-align: center;
        }
        .btn-orange { background: var(--orange); color: white; }
        .btn-orange:hover { background: #e05a2b; box-shadow: 0 10px 25px rgba(255, 107, 53, 0.4); }
        .btn-outline { background: transparent; border: 2px solid var(--neon); color: var(--neon); }
        .btn-outline:hover { background: var(--neon); color: var(--slate); }

        /* --- FOOTER --- */
        footer { background: var(--slate); color: white; padding: 100px 8% 50px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 60px; margin-bottom: 80px; }
        .footer-col h4 { color: var(--neon); margin-bottom: 30px; text-transform: uppercase; letter-spacing: 2px; }
        .footer-col a { 
            display: block; color: #bbb; text-decoration: none; margin-bottom: 15px; 
            font-size: 0.9rem; transition: var(--transition);
        }
        .footer-col a:hover { color: var(--white); transform: translateX(8px); }

        /* --- MODALS --- */
        .modal { 
            position: fixed; inset: 0; background: rgba(0,0,0,0.85); z-index: 2000; 
            display: none; align-items: center; justify-content: center; padding: 30px; 
            backdrop-filter: blur(5px);
        }
        .modal-content { 
            background: white; width: 100%; max-width: 900px; border-radius: 25px; 
            overflow: hidden; position: relative; color: var(--slate); animation: modalOpen 0.4s ease;
        }
        @keyframes modalOpen { from { opacity: 0; scale: 0.9; } to { opacity: 1; scale: 1; } }
        .modal-body { padding: 50px; max-height: 80vh; overflow-y: auto; }
        .close-modal { position: absolute; top: 25px; right: 25px; cursor: pointer; color: var(--slate); z-index: 10; }

        /* --- STATS --- */
        .stat-group { margin-bottom: 40px; }
        .stat-label { display: flex; justify-content: space-between; margin-bottom: 12px; font-weight: 700; }
        .stat-track { height: 14px; background: #eee; border-radius: 20px; overflow: hidden; }
        .stat-fill { height: 100%; background: var(--orange); width: 0; transition: 2s cubic-bezier(0.1, 0, 0.2, 1); }

        @media (max-width: 1000px) {
            .hero h1 { font-size: 3rem; }
            .flex-split { flex-direction: column !important; gap: 40px; }
            .grid-3 { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

/* hamburger */
.menu-toggle{
    display:none;
    font-size:26px;
    cursor:pointer;
}

/* mobile */
@media (max-width:900px){

    #main-header{
        padding:18px 20px;
    }

    nav{
        position:absolute;
        top:70px;
        left:0;
        width:100%;
        background:white;
        display:none;
        flex-direction:column;
        border-top:1px solid #eee;
    }

    nav ul{
        flex-direction:column;
        padding:20px;
        gap:15px;
    }

    nav.active{
        display:flex;
    }

    .menu-toggle{
        display:block;
    }

    .auth-actions{
        display:none;
    }

}