/* =========================
   RESET
========================= */

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

:root{
    --background:#0d0d0d;
    --surface:#151515;
    --surface-hover:#1d1d1d;

    --border:rgba(255,255,255,0.08);

    --text:#f5f5f5;
    --text-secondary:#9a9a9a;

    --radius:14px;

    --container:1400px;
}

/* =========================
   GLOBAL
========================= */

body{
    background:var(--background);
    color:var(--text);
    font-family:Arial, Helvetica, sans-serif;
}

.container{
    width:90%;
    max-width:var(--container);
    margin:auto;
}

a{
    text-decoration:none;
    color:inherit;
}

img{
    max-width:100%;
    display:block;
}

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

.header{
    position:sticky;
    top:0;

    z-index:1000;

    background:rgba(13,13,13,0.96);

    backdrop-filter:blur(12px);

    border-bottom:1px solid var(--border);
}

.header-container{
    height:80px;

    display:flex;
    justify-content:space-between;
    align-items:center;
}

.logo{
    font-size:1.5rem;
    font-weight:800;
    letter-spacing:8px;
}

.nav{
    display:flex;
    gap:35px;
}

.nav a{
    color:var(--text-secondary);
    transition:0.25s;
}

.nav a:hover{
    color:var(--text);
}

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

.hero{
    min-height:calc(100vh - 80px);

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

    text-align:center;
}

.hero-subtitle{
    letter-spacing:6px;
    color:var(--text-secondary);

    margin-bottom:20px;
}

.hero-title{
    font-size:7rem;
    letter-spacing:12px;

    margin-bottom:25px;
}

.hero-description{
    max-width:700px;

    margin:0 auto;

    line-height:1.8;

    color:var(--text-secondary);
}

.hero-button{
    display:inline-block;

    margin-top:40px;

    padding:16px 34px;

    border:1px solid var(--border);

    border-radius:12px;

    background:var(--surface);

    transition:0.25s;
}

.hero-button:hover{
    background:var(--surface-hover);
}

/* =========================
   BUTTONS
========================= */

.btn{
    display:inline-flex;

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

    padding:14px 28px;

    border-radius:12px;

    background:var(--surface);

    border:1px solid var(--border);
}

.btn:hover{
    background:var(--surface-hover);
}

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

.card{
    background:var(--surface);

    border:1px solid var(--border);

    border-radius:16px;

    padding:25px;
}

/* =========================
   FORMS
========================= */

.input{
    width:100%;

    padding:15px;

    border:none;

    outline:none;

    border-radius:12px;

    background:#1a1a1a;

    color:white;

    border:1px solid var(--border);
}

/* =========================
   GRID
========================= */

.grid{
    display:grid;
    gap:25px;
}

.grid-2{
    grid-template-columns:repeat(2,1fr);
}

.grid-3{
    grid-template-columns:repeat(3,1fr);
}

.grid-4{
    grid-template-columns:repeat(4,1fr);
}

/* =========================
   RESPONSIVE
========================= */

@media(max-width:1000px){

    .grid-4{
        grid-template-columns:repeat(2,1fr);
    }

    .hero-title{
        font-size:5rem;
    }

}

@media(max-width:768px){

    .header-container{
        flex-direction:column;

        gap:15px;

        height:auto;

        padding:20px 0;
    }

    .nav{
        flex-wrap:wrap;
        justify-content:center;
    }

    .grid-2,
    .grid-3,
    .grid-4{
        grid-template-columns:1fr;
    }

    .hero-title{
        font-size:3rem;
    }

}
/* =========================
   HEADER ACTIONS
========================= */

.header-actions{
    display:flex;
    align-items:center;
    gap:12px;
}

.user-greeting{
    color:var(--text-secondary);
    font-size:0.95rem;
}

@media(max-width:1100px){

    .header-container{
        flex-direction:column;
        gap:15px;
        padding:20px 0;
        height:auto;
    }

    .header-actions{
        flex-wrap:wrap;
        justify-content:center;
    }

}

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

.menu-toggle{
    display:none;

    background:none;
    border:none;

    color:white;

    font-size:2rem;
}

.mobile-menu{

    display:none;

    flex-direction:column;

    gap:20px;

    padding:25px;

    background:#111111;

    border-bottom:1px solid var(--border);

}

.mobile-menu a{

    color:white;

}

.mobile-menu-open{

    display:flex;

}

@media(max-width:900px){

    .nav{
        display:none;
    }

    .header-actions{
        display:none;
    }

    .menu-toggle{
        display:block;
    }

}