*{
    box-sizing:border-box;
}

html{
    scroll-behavior:smooth;
    scroll-padding-top:85px;
}

body{
    margin:0;
    font-family:Arial,Helvetica,sans-serif;
    background:#f3f7fb;
    color:#263b52;
    line-height:1.7;
}


/* =========================
   HEADER
========================= */

.header{
    position:sticky;
    top:0;
    z-index:999;
    background:rgba(255,255,255,.97);
    border-bottom:1px solid #e2eaf3;
    box-shadow:0 2px 12px rgba(20,60,100,.06);
}

.header-inner{
    max-width:1250px;
    margin:auto;
    height:75px;
    padding:0 20px;
    display:flex;
    align-items:center;
    justify-content:space-between;
}

.logo{
    display:flex;
    align-items:center;
    gap:12px;
    text-decoration:none;
    font-size:25px;
    font-weight:800;
    color:#10233c;
}

.logo img{
    width:48px;
    height:48px;
    object-fit:cover;
    border-radius:11px;
    box-shadow:0 4px 12px rgba(20,88,235,.18);
}

nav{
    display:flex;
    gap:28px;
}

nav a{
    text-decoration:none;
    color:#40556d;
    font-weight:600;
    transition:.2s ease;
}

nav a:hover{
    color:#155ee8;
}

.menu-btn{
    display:none;
    background:none;
    border:0;
    font-size:27px;
    cursor:pointer;
    color:#10233c;
}


/* =========================
   HERO
========================= */

.hero{
    position:relative;
    padding:70px 20px 80px;
    text-align:center;
    color:white;
    overflow:hidden;

    background:
    radial-gradient(
        circle at 50% 20%,
        rgba(36,112,255,.38),
        transparent 38%
    ),
    linear-gradient(
        135deg,
        #071a42 0%,
        #0b3da8 48%,
        #0757dc 100%
    );

    border-bottom:4px solid #2475ff;
}

.hero:before{
    content:"";
    position:absolute;
    width:420px;
    height:420px;
    border-radius:50%;
    background:rgba(255,255,255,.04);
    top:-220px;
    left:-150px;
}

.hero:after{
    content:"";
    position:absolute;
    width:350px;
    height:350px;
    border-radius:50%;
    background:rgba(255,255,255,.04);
    bottom:-220px;
    right:-100px;
}

.hero-content{
    position:relative;
    z-index:2;
    max-width:950px;
    margin:auto;
}

.hero-logo{
    width:125px;
    height:125px;
    object-fit:cover;
    border-radius:28px;
    margin-bottom:22px;

    border:4px solid rgba(255,255,255,.95);

    box-shadow:
    0 12px 35px rgba(0,0,0,.28),
    0 0 0 8px rgba(255,255,255,.08);
}

.hero h1{
    font-size:48px;
    line-height:1.2;
    margin:10px 0 20px;

    background:
    linear-gradient(
        90deg,
        #ffffff 0%,
        #e8f3ff 45%,
        #9ed2ff 100%
    );

    -webkit-background-clip:text;
    background-clip:text;
    color:transparent;
}

.hero p{
    font-size:18px;
    max-width:800px;
    margin:0 auto 32px;
    color:#e3efff;
}

.hero-buttons{
    display:flex;
    justify-content:center;
    gap:15px;
    flex-wrap:wrap;
}

.primary-btn,
.secondary-btn{
    padding:15px 27px;
    border-radius:10px;
    text-decoration:none;
    font-weight:700;
    transition:.25s ease;
}

.primary-btn{
    background:#ffffff;
    color:#0759d7;
    box-shadow:0 8px 22px rgba(0,0,0,.16);
}

.primary-btn:hover{
    transform:translateY(-2px);
    box-shadow:0 12px 28px rgba(0,0,0,.22);
}

.secondary-btn{
    border:1px solid rgba(255,255,255,.55);
    color:white;
    background:rgba(5,30,75,.45);
    backdrop-filter:blur(8px);
}

.secondary-btn:hover{
    background:rgba(255,255,255,.12);
    transform:translateY(-2px);
}


/* =========================
   MAIN CONTAINER
========================= */

.container{
    max-width:1250px;
    margin:auto;
    padding:38px 18px;
}


/* =========================
   CARDS
========================= */

.card{
    background:white;
    border:1px solid #dce6f0;
    border-radius:18px;
    padding:32px;
    margin-bottom:28px;

    box-shadow:
    0 4px 16px rgba(20,50,80,.05);

    transition:
    transform .2s ease,
    box-shadow .2s ease;
}

.card:hover{
    box-shadow:
    0 8px 24px rgba(20,70,120,.08);
}

.card h2{
    font-size:30px;
    color:#10243e;
    margin:0 0 22px;
    padding-bottom:13px;

    border-bottom:2px solid #edf2f6;
}

.card h2:after{
    content:"";
    display:block;
    width:55px;
    height:3px;
    margin-top:12px;
    border-radius:5px;
    background:linear-gradient(
        90deg,
        #0d5de8,
        #27a5ff
    );
}

.card p,
.card li{
    font-size:17px;
    color:#405a73;
}


/* =========================
   TABLE OF CONTENTS
========================= */

.toc{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:2px 30px;
}

.toc a{
    text-decoration:none;
    color:#315776;
    font-size:16px;
    padding:7px 0;
    border-bottom:1px solid #f0f3f6;
    transition:.2s ease;
}

.toc a:hover{
    color:#0b63e8;
    padding-left:4px;
}


/* =========================
   INVITE BOX
========================= */

.invite-box{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;

    padding:20px 25px;

    border:1px dashed #2180ef;
    border-radius:14px;

    background:
    linear-gradient(
        135deg,
        #f4f9ff,
        #eef6ff
    );
}

.invite-box span{
    display:block;
    font-size:12px;
    color:#67819b;
    font-weight:bold;
}

.invite-box strong{
    display:block;
    font-size:28px;
    letter-spacing:3px;
    color:#075fe1;
}

.invite-box button{
    border:0;
    background:linear-gradient(
        135deg,
        #075fe1,
        #1b91f5
    );
    color:white;
    padding:12px 22px;
    border-radius:9px;
    font-weight:bold;
    cursor:pointer;
    transition:.2s ease;
}

.invite-box button:hover{
    transform:translateY(-2px);
    box-shadow:0 7px 16px rgba(7,95,225,.22);
}

.small-note{
    font-size:14px!important;
    color:#70859a!important;
}


/* =========================
   DOWNLOAD BUTTON
========================= */

.download-btn{
    display:block;
    max-width:400px;
    margin:25px auto;

    padding:16px;

    text-align:center;
    text-decoration:none;

    color:white;
    font-weight:bold;
    font-size:18px;

    border-radius:12px;

    background:
    linear-gradient(
        100deg,
        #075bd8,
        #1688ee,
        #29aaf5
    );

    box-shadow:
    0 8px 20px rgba(0,100,220,.20);

    transition:.25s ease;
}

.download-btn:hover{
    transform:translateY(-2px);

    box-shadow:
    0 12px 26px rgba(0,100,220,.28);
}


/* =========================
   APP INFO
========================= */

.app-info{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:15px;
    margin-top:25px;
}

.app-info div{
    padding:18px;
    background:#f7faff;
    border:1px solid #e0e8ef;
    border-radius:12px;
    text-align:center;
}

.app-info span{
    display:block;
    font-size:11px;
    color:#73879b;
    font-weight:600;
}

.app-info strong{
    font-size:16px;
    color:#172e49;
}


/* =========================
   FEATURES
========================= */

.features{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:20px;
}

.feature{
    padding:25px;

    border:1px solid #dce5ee;
    border-radius:15px;

    background:
    linear-gradient(
        145deg,
        #ffffff,
        #f8fbff
    );

    transition:.25s ease;
}

.feature:hover{
    transform:translateY(-3px);

    border-color:#b9d7fa;

    box-shadow:
    0 8px 22px rgba(20,90,160,.08);
}

.feature-icon{
    width:52px;
    height:52px;

    display:flex;
    align-items:center;
    justify-content:center;

    font-size:27px;

    border-radius:13px;

    background:#edf6ff;
}

.feature h3{
    color:#0865df;
    margin:10px 0 5px;
}

.feature p{
    margin-bottom:0;
}


/* =========================
   TABLE
========================= */

table{
    width:100%;
    border-collapse:collapse;
}

th,
td{
    border:1px solid #dce5ee;
    padding:15px;
    text-align:left;
}

th{
    background:#f1f6fb;
    color:#18324d;
}

td{
    color:#405a73;
}


/* =========================
   SCREENSHOTS
========================= */

.screenshots{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:20px;
}

.screenshots div{
    border:1px solid #dce5ee;
    border-radius:14px;
    overflow:hidden;
    text-align:center;
    background:#ffffff;

    box-shadow:
    0 4px 12px rgba(20,50,80,.04);
}

.screenshots img{
    width:100%;
    height:400px;
    object-fit:contain;
    background:#07101a;
    display:block;
}

.screenshots p{
    font-weight:bold;
    font-size:15px;
    padding:0 10px;
}


/* =========================
   NOTICE / WARNING
========================= */

.notice,
.warning{
    padding:20px;
    border-radius:12px;

    background:#f2f8ff;

    border-left:5px solid #078cff;
}

.warning{
    background:#fff8ed;
    border-left-color:#f09a28;
}

.notice p,
.warning p{
    margin-bottom:0;
}


/* =========================
   FAQ
========================= */

details{
    border:1px solid #dce5ee;
    border-radius:12px;
    margin:12px 0;
    padding:0 18px;

    background:#ffffff;

    transition:.2s ease;
}

details:hover{
    border-color:#b9d6f5;
}

summary{
    cursor:pointer;
    font-weight:bold;
    padding:17px 0;
    color:#183653;
}

details p{
    padding-bottom:12px;
}


/* =========================
   FOOTER
========================= */

footer{
    background:
    linear-gradient(
        135deg,
        #020912,
        #061426
    );

    color:#9bb9d1;
    padding:50px 20px 25px;

    border-top:4px solid #086ee8;
}

.footer-inner{
    max-width:1000px;
    margin:auto;

    display:grid;
    grid-template-columns:1.3fr 1fr 1fr;
    gap:50px;
}

footer h3{
    color:white;
    margin-top:0;
}

footer a{
    display:block;
    color:#9bb9d1;
    text-decoration:none;
    margin:7px 0;
    transition:.2s ease;
}

footer a:hover{
    color:#49adff;
    padding-left:3px;
}

.copyright{
    max-width:1000px;
    margin:35px auto 0;
    padding-top:22px;

    border-top:1px solid #26333e;

    text-align:center;
    font-size:14px;
}


/* =========================
   MOBILE
========================= */

@media(max-width:760px){

    .header-inner{
        height:65px;
    }

    .logo{
        font-size:21px;
    }

    .logo img{
        width:40px;
        height:40px;
    }

    .menu-btn{
        display:block;
    }

    nav{
        display:none;

        position:absolute;
        left:0;
        right:0;
        top:65px;

        background:white;

        padding:12px 20px;

        flex-direction:column;
        gap:0;

        border-bottom:1px solid #ddd;

        box-shadow:
        0 8px 18px rgba(20,50,80,.08);
    }

    nav.active{
        display:flex;
    }

    nav a{
        padding:11px 0;
        border-bottom:1px solid #f0f2f5;
    }

    .hero{
        padding:48px 17px 58px;
    }

    .hero-logo{
        width:95px;
        height:95px;
        border-radius:22px;
    }

    .hero h1{
        font-size:34px;
    }

    .hero p{
        font-size:16px;
    }

    .hero-buttons{
        gap:11px;
    }

    .primary-btn,
    .secondary-btn{
        width:100%;
        max-width:350px;
    }

    .container{
        padding:25px 13px;
    }

    .card{
        padding:23px 17px;
        border-radius:15px;
    }

    .card h2{
        font-size:25px;
    }

    .card p,
    .card li{
        font-size:16px;
    }

    .toc{
        grid-template-columns:1fr;
    }

    .invite-box{
        align-items:flex-start;
        flex-direction:column;
    }

    .invite-box button{
        width:100%;
    }

    .app-info,
    .features,
    .screenshots,
    .footer-inner{
        grid-template-columns:1fr;
    }

    .screenshots img{
        height:450px;
    }

    table{
        display:block;
        overflow-x:auto;
        white-space:nowrap;
    }

}


/* =========================
   SMALL MOBILE
========================= */

@media(max-width:420px){

    .hero h1{
        font-size:30px;
    }

    .hero-logo{
        width:85px;
        height:85px;
    }

    .card{
        padding:20px 15px;
    }

    .download-btn{
        font-size:16px;
        padding:15px;
    }

    .feature{
        padding:20px;
    }

}

.hero-invite{
    display:flex;
    align-items:center;
    gap:10px;
    padding:10px 14px;
    border:1px solid #168fe0;
    border-radius:10px;
    background:linear-gradient(135deg,#123452,#0b263e);
    color:#ffffff;
    box-shadow:0 4px 14px rgba(0,140,230,.15);
}

.hero-invite span{
    font-size:14px;
    color:#d5eaf7;
}

.hero-invite strong{
    color:#4fc3ff;
    font-size:16px;
    letter-spacing:1.5px;
}

.hero-invite button{
    border:0;
    padding:8px 13px;
    border-radius:7px;
    background:#078cff;
    color:#ffffff;
    font-weight:700;
    cursor:pointer;
    transition:.2s;
}

.hero-invite button:hover{
    background:#20a8ff;
    transform:translateY(-1px);
}

@media(max-width:760px){

    .hero-invite{
        width:100%;
        max-width:400px;
        justify-content:center;
    }

}