:root{

    --black:#111111;
    --white:#ffffff;

    --text:#666666;

    --light:#fafafa;

    --border:#ececec;

    --accent:#234436;

    --card-bg:#ffffff;

    --radius-sm:12px;
    --radius-md:20px;
    --radius-lg:24px;
    --radius-pill:999px;
    
    /* CTA */
    --cta-bg:#111111;
    --cta-heading:#ffffff;
    --cta-text:#bdbdbd;
    --cta-btn-bg:#ffffff;
    --cta-btn-text:#111111;
    --cta-btn-border:#ffffff;

}



html.dark{

    --black:#ffffff;
    --white:#111111;

    --text:#cfcfcf;

    --light:#1a1a1a;

    --border:#333333;

    --accent:#2f6d56;

    --bg:#111111;
    --surface:#1b1b1b;
    --heading:#ffffff;
    
    --card-bg:#1b1b1b;
    
    /* CTA (same in both themes) */
    --cta-bg:#111111;
    --cta-heading:#ffffff;
    --cta-text:#bdbdbd;
    --cta-btn-bg:#ffffff;
    --cta-btn-text:#111111;
    --cta-btn-border:#ffffff;

}

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

input,
button,
textarea,
select{
    font:inherit;
}

html{
    scroll-behavior:smooth;
    scroll-padding-top:110px;
    -webkit-text-size-adjust:100%;
}

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

section{
    overflow:hidden;
}

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

body{
    font-family:'Inter',sans-serif;
    color:var(--black);
    background:var(--white);
    overflow-x:hidden;

    text-rendering:optimizeLegibility;
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale;

    transition:
        background-color .35s ease,
        color .35s ease;
}

.site-header{
    width:100%;
    background:var(--white);
    padding:22px 0;
    border-bottom:1px solid var(--border);

    position:sticky;
    top:0;
    z-index:1000;

    transition:
        padding .3s ease,
        box-shadow .3s ease,
        background-color .3s ease;
}

.container{
    width:100%;
    max-width:1380px;
    margin:0 auto;
    padding:0 20px;
}

.header-wrapper{
    display:flex;
    align-items:center;
    justify-content:space-between;
}

.logo img{
    width:185px;
    display:block;
}

.desktop-menu ul{
    display:flex;
    gap:55px;
    list-style:none;
    margin:0;
    padding:0;
}

.desktop-menu a{
    text-decoration:none;
    color:var(--black);
    font-size:16px;
    font-weight:600;
    position:relative;

    transition:
        color .3s ease;
}

/* Keep visited links black */
.desktop-menu a:visited{
    color:var(--black);
}

/* Hover */
.desktop-menu a:hover{
    color:var(--text);
}

.desktop-menu a:hover::after{
    transform:scaleX(1);
}

/* Active page */
.desktop-menu a.active{
    color:var(--black);
    font-weight:700;
}

.desktop-menu a.active::after{
    transform:scaleX(1);
    border-radius:2px;
}

.header-btn{
    background:var(--black);
    color:var(--white);
    text-decoration:none;
    padding:15px 34px;
    border-radius:var(--radius-pill);
    font-weight:600;
    transition:
        background-color .3s ease,
        color .3s ease,
        transform .3s ease,
        box-shadow .3s ease;
}

.header-actions{
    display:flex;
    align-items:center;
    gap:16px;
}

.theme-toggle{

    width:48px;
    height:48px;

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

    background:var(--black);
    color:var(--white);

    border:none;
    border-radius:50%;

    cursor:pointer;

    font-size:18px;

    transition:
        background-color .3s ease,
        color .3s ease,
        transform .3s ease;

}

.theme-toggle:hover{

    transform:translateY(-2px);
    box-shadow:0 12px 30px rgba(0,0,0,.15);

}

.header-btn:hover{
    background:var(--black);
    color:var(--white);
    transform:translateY(-2px);
    box-shadow:0 12px 30px rgba(0,0,0,.15);
}

.mobile-toggle{
    display:none;
}

.site-header.scrolled{
    background:rgba(255,255,255,.92);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);

    box-shadow:0 8px 24px rgba(0,0,0,.06);
}

html.dark .site-header.scrolled{

    background:rgba(17,17,17,.92);

}

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

.hero{

padding:80px 0 120px;

}

.hero-grid{

display:grid;
grid-template-columns:repeat(2,minmax(0,1fr));
align-items:center;

position:relative;

}

.hero-content{

    position:relative;
    z-index:2;

    width:120%;
    margin-right:-20%;

}

.hero-tag{

display:inline-block;

margin-bottom:4px;
font-size:11px;
letter-spacing:.8px;
text-transform:uppercase;
color:var(--text);

}

.hero h1{

font-size:68px;

line-height:1.08;

font-weight:800;

margin-bottom:28px;

}

.hero p{

font-size:20px;

line-height:1.8;

max-width:640px;

color:var(--text);

margin-bottom:24px;

}

.hero-buttons{

display:flex;

gap:18px;

margin-top:40px;

}

.btn-dark{
    background:var(--black);
    color:var(--white);
    padding:16px 36px;
    border-radius:var(--radius-pill);
    text-decoration:none;
    font-weight:600;

    transition:
        background-color .3s ease,
        color .3s ease,
        transform .3s ease,
        box-shadow .3s ease;
}

.btn-dark:hover{
    transform:translateY(-2px);
    box-shadow:0 12px 30px rgba(0,0,0,.15);
}

.btn-outline{
    border:2px solid var(--black);
    color:var(--black);
    padding:14px 36px;
    border-radius:var(--radius-pill);
    text-decoration:none;
    font-weight:600;

    transition:
        background-color .3s ease,
        color .3s ease,
        border-color .3s ease,
        transform .3s ease;
}

.btn-outline:hover{
    background:var(--black);
    color:var(--white);
    transform:translateY(-2px);
}

.hero-placeholder{

height:520px;
border-radius:var(--radius-lg);
background:var(--light);
border:2px dashed var(--border);

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

font-size:36px;
font-weight:700;
color:var(--text);

overflow:hidden;

}

.hero-image{
    display:flex;
    justify-content:center;
    align-items:center;
    min-width:0;
}

.hero-mockup{

width:1160px;
max-width:100%;
height:auto;
display:block;

}

/*==================================
CTA
==================================*/

.cta{

    margin-top:0;
    padding:110px 0;

    background:var(--cta-bg);

    text-align:center;

}

.cta h2{

    font-size:58px;
    font-weight:700;
    line-height:1.15;
    margin-bottom:20px;

    color:var(--cta-heading);

}

.cta p{

    font-size:20px;
    max-width:700px;
    margin:0 auto 40px;
    line-height:1.8;

    color:var(--cta-text);

}

.cta .btn-dark{

    background:var(--cta-btn-bg);
    color:var(--cta-btn-text);
    border:2px solid var(--cta-btn-border);

}

.cta .btn-dark:hover{

    background:transparent;
    color:var(--cta-btn-bg);
    border-color:var(--cta-btn-border);

}

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

.about-hero{

padding:100px 0 120px;

}

.about-hero h1{

max-width:650px;

}

.about-hero p{

max-width:620px;

}

.btn-secondary{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    padding:16px 34px;
    border:1px solid var(--black);
    border-radius:var(--radius-pill);
    color:var(--black);
    text-decoration:none;
    font-weight:600;

    transition:
        background-color .3s ease,
        color .3s ease,
        border-color .3s ease,
        transform .3s ease;
}

.btn-secondary:hover{
    background:var(--black);
    color:var(--white);
    transform:translateY(-2px);
}

.btn-primary{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    padding:15px 34px;
    background:var(--black);
    color:var(--white);
    border-radius:var(--radius-pill);
    text-decoration:none;
    font-weight:600;

    transition:
        background-color .3s ease,
        color .3s ease,
        transform .3s ease,
        box-shadow .3s ease;
}

.btn-primary:hover{
    background:var(--black);
    color:var(--white);
    transform:translateY(-2px);
    box-shadow:0 12px 30px rgba(0,0,0,.15);
}

.desktop-menu a::after{
    content:"";
    position:absolute;
    left:0;
    bottom:-8px;

    width:100%;
    height:2px;

    background:var(--black);

    transform:scaleX(0);
    transform-origin:left;

    transition:transform .3s ease;
}

/* ==========================
   SCROLL REVEAL
========================== */

.reveal{
    opacity:0;
    transform:translateY(40px);

    transition:
        opacity .8s ease,
        transform .8s cubic-bezier(.22,.61,.36,1);
}

.reveal.active{

    opacity:1;

    transform:translateY(0);

}