/* =========================================
   BASE RESET (VALIDATOR SAFE)
========================================= */
html {
    box-sizing: border-box;
}

body, h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, img,
header, footer, section, nav, div, a, button {
    margin: 0;
    padding: 0;
    box-sizing: inherit;
}

/* =========================================
   BODY + SNAP SCROLL (VALIDATOR SAFE)
========================================= */
body {
    -webkit-scroll-snap-type: y mandatory;
    scroll-snap-type: y mandatory;
    overflow-y: scroll;
    height: 100vh;
    font-family: 'Poppins', sans-serif;
    background: #05050a;
    color: #e6e6ff;
    line-height: 1.6;
}

/* Sections snap cleanly */
.section,
.golden-transition,
.footer {
    -webkit-scroll-snap-align: start;
    scroll-snap-align: start;
}

/* =========================================
   COLOR VARIABLES
========================================= */
:root {
    --purple: #b400ff;
    --pink:   #ff00d4;
    --blue:   #00eaff;
    --yellow: #ffe600;
    --white:  #ffffff;
}

/* =========================================
   GOLDEN RATIO SECTION HEIGHTS
========================================= */
.hero { height: 61.8vh; }
.golden-transition { height: 38.2vh; }
.section { height: 61.8vh; }
.section.short { height: 38.2vh; }

/* =========================================
   GOLDEN RATIO TYPOGRAPHY
========================================= */
h1 { font-size: 2.618rem; }
h2 { font-size: 1.618rem; }
h3 { font-size: 1.618rem; }
p { font-size: 1rem; }

/* =========================================
   NAVIGATION
========================================= */
.navbar {
    width: 100%;
    padding: 26px 39px;
    position: fixed;
    top: 0;
    left: 0;
    background: rgba(10, 10, 15, 0.7);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
}

.nav-container {
    width: 61.8%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.618rem;
    font-weight: 700;
    color: #b400ff;
    text-decoration: none;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 26px;
}

.nav-links a {
    color: #e6e6ff;
    text-decoration: none;
    font-weight: 500;
    transition: 0.25s ease;
}

/* =========================================
   HERO SECTION (GOLDEN RECTANGLE)
========================================= */
.hero {
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at center, #11111a, #050509);
    text-align: center;
    padding: 0 32px;
}

.hero-inner {
    width: 61.8%;
    max-width: 900px;
    margin: 0 auto;
}

.tagline {
    margin-top: 13px;
    margin-bottom: 26px;
}

/* =========================================
   BUTTONS (GOLDEN RATIO + VALIDATOR SAFE)
========================================= */
.button {
    padding: 13px 26px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    border: 2px solid;
    text-decoration: none;
    transition: 0.25s ease;
}

/* Literal hex values (no var()) */
.button.purple { border-color: #b400ff; color: #b400ff; }
.button.pink   { border-color: #ff00d4; color: #ff00d4; }
.button.blue   { border-color: #00eaff; color: #00eaff; }
.button.yellow { border-color: #ffe600; color: #ffe600; }
.button.white  { border-color: #ffffff; color: #ffffff; }

/* Hover states */
.button.purple:hover {
    background: #b400ff;
    color: #000;
}

.button.pink:hover {
    background: #ff00d4;
    color: #000;
}

.button.blue:hover {
    background: #00eaff;
    color: #000;
}

.button.yellow:hover {
    background: #ffe600;
    color: #000;
}

.button.white:hover {
    background: #ffffff;
    color: #000;
}

/* =========================================
   GOLDEN TRANSITION BAND
========================================= */
.golden-transition {
    background: #050509;
}

/* =========================================
   GOLDEN RATIO SECTION SPACING
========================================= */
.section {
    padding: 64px 39px;
    max-width: 1100px;
    margin: auto;
}

/* =========================================
   GOLDEN GRID (1 : 1.618)
========================================= */
.golden-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 420px));
    gap: 39px;
    justify-content: center;
}

/* =========================================
   GOLDEN CARDS (VALIDATOR SAFE BACKDROP)
========================================= */
.golden-card {
    padding: 39px;
    border-radius: 13px;
    background-color: rgba(15, 15, 25, 0.6);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    height: calc(260px * 1.618);
}

/* =========================================
   CONTACT SECTION
========================================= */
.contact-links {
    margin-top: 26px;
    font-size: 1rem;
}

/* =========================================
   FOOTER (GOLDEN RATIO)
========================================= */
.footer {
    padding: 39px;
    text-align: center;
    background: #050509;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    font-size: 1.618rem;
    margin-bottom: 26px;
}

.footer-links {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 26px;
    margin-bottom: 26px;
}

.footer-links a {
    color: #e6e6ff;
    text-decoration: none;
}

.footer-copy {
    opacity: 0.7;
}