/* ==========================================================================
   SMK Ventures:design tokens
   Palette: 0x9950DC (purple)  ·  0x1440D0 (blue)  ·  0x000000 (black)
   ========================================================================== */
:root {
    --font-ui: -apple-system, "SF Pro Text", "SF Pro Display", system-ui,
               "Helvetica Neue", Arial, sans-serif;

    --purple: #9950DC;
    --blue:   #1440D0;
    --black:  #000000;

    --fg:        #f5f5f7;
    --muted:     rgba(235, 235, 245, 0.62);
    --dim:       rgba(235, 235, 245, 0.30);

    /* glass system:lifted from personal-website */
    --glass-bg:    rgba(20, 18, 36, 0.42);
    --glass-edge:  rgba(255, 255, 255, 0.14);
    --glass-sheen: linear-gradient(180deg,
                    rgba(255, 255, 255, 0.10),
                    rgba(255, 255, 255, 0.02) 40%,
                    rgba(255, 255, 255, 0) 70%);
    --glass-blur: blur(34px) saturate(200%);
    --glass-elev: 0 10px 34px rgba(0, 0, 0, 0.40);

    --radius-nav:    12px;   /* per spec */
    --radius-card:   18px;
    --radius-pill:   999px;
}

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

html { scroll-behavior: smooth; }

html, body {
    background: var(--black);
    color: var(--fg);
    font-family: var(--font-ui);
    font-size: 15px;
    line-height: 1.5;
    letter-spacing: -0.01em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100%;
}

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

img, svg { display: block; }

/* ==========================================================================
   Vanta.js HALO background:fixed behind everything
   ========================================================================== */
#vanta-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background: var(--black);
}

/* Soft black overlay so scroll sections stay legible while vanta shows through */
#vanta-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 40%,
                transparent 0%,
                rgba(0, 0, 0, 0.25) 55%,
                rgba(0, 0, 0, 0.45) 100%);
    pointer-events: none;
}

/* Progressive darken overlay:opacity grows with scroll, full at contact.
   --d (0 → 1) is driven by JS; --m (0 / 1) is forced full by modal open. */
#bg-darken {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: #000000;
    opacity: max(var(--d, 0), var(--m, 0));
    transition: opacity 0.35s ease;
}

main { position: relative; z-index: 2; }

/* ==========================================================================
   Logo:top-left, fixed
   ========================================================================== */
.site-logo {
    position: fixed;
    top: 18px;
    left: clamp(16px, 3vw, 32px);
    z-index: 110;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    padding: 0;
    border-radius: 50%;
    transition: transform 0.25s ease, filter 0.25s ease;
}

.site-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 4px 18px rgba(153, 80, 220, 0.45));
}

.site-logo:hover { transform: translateY(-2px) scale(1.04); }

/* ==========================================================================
   Navbar:floating glass pill, corner-radius 12
   (ported from personal-website .navbar, radius adjusted per spec)
   ========================================================================== */
.navbar {
    position: fixed;
    top: calc(env(safe-area-inset-top, 0px) + 14px);
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;

    display: flex;
    align-items: center;
    justify-content: center;
    height: 56px;
    padding: 0 18px;

    border: 0.5px solid var(--glass-edge);
    border-radius: var(--radius-nav);
    background: var(--glass-sheen), var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: inset 0 1px 0 var(--glass-edge), var(--glass-elev);
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 6px;
    height: 100%;
}

.nav-links li { display: flex; align-items: center; }

.nav-link {
    display: inline-flex;
    align-items: center;
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    padding: 8px 16px;
    border-radius: var(--radius-pill);
    transition: background 0.25s ease, color 0.2s ease;
}

.nav-link:hover {
    color: var(--fg);
    background: color-mix(in srgb, var(--purple) 22%, transparent);
}

.nav-link.active {
    color: var(--fg);
    background: color-mix(in srgb, var(--purple) 30%, transparent);
}

@media (max-width: 600px) {
    .navbar { height: 50px; padding: 0 12px; }
    .nav-link { padding: 6px 12px; font-size: 0.82rem; }
    .site-logo { width: 46px; height: 46px; top: 12px; left: 12px; }
}

/* ==========================================================================
   Hero:slogan + X icon + scroll arrow
   ========================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100svh;
    padding: 120px clamp(20px, 5vw, 60px) 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
    text-align: center;
}

.hero-headline {
    font-weight: 700;
    font-size: clamp(2rem, 5.6vw, 4.4rem);
    line-height: 1.18;
    letter-spacing: -0.035em;
    color: #ffffff;
    padding-bottom: 0.08em;

    opacity: 0;
    transform: translateY(12px);
    animation: hero-fade 2s ease-out 0.2s forwards;
}

.hero-x {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    color: var(--fg);
    border: 0.5px solid var(--glass-edge);
    background: var(--glass-sheen), var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: inset 0 1px 0 var(--glass-edge), var(--glass-elev);
    transition: background 0.25s ease, transform 0.25s ease,
                box-shadow 0.3s ease, border-color 0.25s ease;

    opacity: 0;
    transform: translateY(8px);
    animation: hero-fade 2s ease-out 0.6s forwards;
}

.hero-x svg { width: 20px; height: 20px; }

.hero-x:hover {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--purple) 60%, var(--glass-edge));
    box-shadow: inset 0 1px 0 var(--glass-edge), var(--glass-elev),
                0 8px 28px color-mix(in srgb, var(--purple) 38%, transparent);
}

@keyframes hero-fade {
    to { opacity: 1; transform: translateY(0); }
}

/* Scroll arrow:appears after hero fade completes */
.scroll-arrow {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--fg);
    border: 0.5px solid var(--glass-edge);
    background: var(--glass-sheen), var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: inset 0 1px 0 var(--glass-edge), var(--glass-elev);

    opacity: 0;
    animation: arrow-in 0.8s ease-out 2.6s forwards,
               arrow-bob 2.4s ease-in-out 3.4s infinite;
    transition: transform 0.25s ease, color 0.2s ease,
                border-color 0.25s ease;
}

.scroll-arrow svg { width: 22px; height: 22px; }

.scroll-arrow:hover {
    color: #d9c6ff;
    border-color: color-mix(in srgb, var(--purple) 60%, var(--glass-edge));
}

@keyframes arrow-in {
    from { opacity: 0; transform: translate(-50%, 10px); }
    to   { opacity: 1; transform: translate(-50%, 0); }
}

@keyframes arrow-bob {
    0%, 100% { transform: translate(-50%, 0); }
    50%      { transform: translate(-50%, 8px); }
}

/* ==========================================================================
   Feature sections:glass cards, image left / text right
   ========================================================================== */
.feature {
    position: relative;
    padding: clamp(60px, 10vh, 120px) clamp(20px, 5vw, 60px);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
}

.feature-card {
    width: 100%;
    max-width: 1080px;
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: clamp(28px, 5vw, 64px);
    align-items: center;

    padding: clamp(28px, 4vw, 48px);
    border: 0.5px solid var(--glass-edge);
    border-radius: var(--radius-card);
    background: var(--glass-sheen), var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: inset 0 1px 0 var(--glass-edge), var(--glass-elev);
    transition: transform 0.4s ease, box-shadow 0.4s ease,
                border-color 0.4s ease;
}

.feature-card.reverse {
    grid-template-columns: 1.1fr 1fr;
}

.feature-card.reverse .feature-visual { order: 2; }
.feature-card.reverse .feature-text   { order: 1; }

.feature-card:hover {
    transform: translateY(-4px);
    border-color: color-mix(in srgb, var(--purple) 40%, var(--glass-edge));
    box-shadow: inset 0 1px 0 var(--glass-edge), var(--glass-elev),
                0 14px 40px color-mix(in srgb, var(--purple) 26%, transparent);
}

/* Visual block:stylized gradient placeholder; swap for an <img> later */
.feature-visual {
    position: relative;
    aspect-ratio: 4 / 3;
    border-radius: 14px;
    overflow: hidden;
    border: 0.5px solid var(--glass-edge);
    background: radial-gradient(circle at 30% 30%,
                rgba(153, 80, 220, 0.55),
                rgba(20, 64, 208, 0.30) 55%,
                rgba(0, 0, 0, 0.85) 100%);
}

.feature-visual[data-variant="do"] {
    background: radial-gradient(circle at 70% 30%,
                rgba(20, 64, 208, 0.65),
                rgba(153, 80, 220, 0.30) 55%,
                rgba(0, 0, 0, 0.85) 100%);
}

.feature-visual[data-variant="contact"] {
    background: conic-gradient(from 140deg at 50% 50%,
                rgba(153, 80, 220, 0.55),
                rgba(20, 64, 208, 0.55),
                rgba(0, 0, 0, 0.75),
                rgba(153, 80, 220, 0.55));
}

.visual-glow {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%),
                rgba(255, 255, 255, 0.18),
                transparent 45%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.feature-card:hover .visual-glow { opacity: 1; }

.feature-text {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.feature-title {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.1;
    color: var(--fg);
}

.feature-body {
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.65;
    max-width: 52ch;
}

@media (max-width: 800px) {
    .feature-card,
    .feature-card.reverse {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .feature-card.reverse .feature-visual { order: 0; }
    .feature-card.reverse .feature-text   { order: 0; }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    padding: 40px clamp(20px, 5vw, 60px) 60px;
}

.footer-inner {
    max-width: 1080px;
    margin: 0 auto;
    padding: 20px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;

    border: 0.5px solid var(--glass-edge);
    border-radius: var(--radius-nav);
    background: var(--glass-sheen), var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: inset 0 1px 0 var(--glass-edge), var(--glass-elev);
}

.footer-brand {
    color: var(--muted);
    font-size: 0.85rem;
    letter-spacing: -0.01em;
}

.footer-social {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    color: var(--fg);
    border: 0.5px solid var(--glass-edge);
    transition: background 0.25s ease, color 0.2s ease,
                transform 0.25s ease, border-color 0.25s ease;
}

.footer-social svg { width: 16px; height: 16px; }

.footer-social:hover {
    transform: translateY(-2px);
    color: #d9c6ff;
    border-color: color-mix(in srgb, var(--purple) 60%, var(--glass-edge));
    background: color-mix(in srgb, var(--purple) 20%, transparent);
}

@media (max-width: 500px) {
    .footer-inner { flex-direction: column; text-align: center; }
}

/* Hide focus rings, use tint halo (matches personal-website) */
:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--purple) 35%, transparent);
}

/* ==========================================================================
   Contact CTA:bottom-right of the contact feature card
   ========================================================================== */
.feature-card { position: relative; }

.contact-cta {
    position: absolute;
    right: clamp(20px, 3vw, 32px);
    bottom: clamp(20px, 3vw, 32px);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px 10px 20px;
    font: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--fg);
    cursor: pointer;
    border: 0.5px solid color-mix(in srgb, var(--purple) 45%, var(--glass-edge));
    border-radius: var(--radius-pill);
    background: var(--glass-sheen),
                color-mix(in srgb, var(--purple) 22%, var(--glass-bg));
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: inset 0 1px 0 var(--glass-edge), var(--glass-elev);
    transition: background 0.25s ease, transform 0.25s ease,
                box-shadow 0.3s ease, border-color 0.25s ease;
}

.contact-cta svg { width: 16px; height: 16px; }

.contact-cta:hover {
    transform: translateY(-2px);
    background: var(--glass-sheen),
                color-mix(in srgb, var(--purple) 38%, var(--glass-bg));
    border-color: color-mix(in srgb, var(--purple) 70%, var(--glass-edge));
    box-shadow: inset 0 1px 0 var(--glass-edge), var(--glass-elev),
                0 10px 30px color-mix(in srgb, var(--purple) 38%, transparent);
}

@media (max-width: 800px) {
    .contact-cta {
        position: static;
        align-self: flex-start;
        margin-top: 8px;
    }
}

/* ==========================================================================
   Contact modal
   ========================================================================== */
.contact-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(16px, 4vw, 40px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
}

.contact-modal[hidden] { display: none; }

.contact-modal.open {
    opacity: 1;
    pointer-events: auto;
}

.contact-modal-backdrop {
    position: absolute;
    inset: 0;
    background: #000;
}

.contact-modal-panel {
    position: relative;
    width: 100%;
    max-width: 520px;
    padding: clamp(28px, 4vw, 44px);
    border: 0.5px solid var(--glass-edge);
    border-radius: 18px;
    background: var(--glass-sheen),
                color-mix(in srgb, var(--purple) 8%, rgba(14, 12, 24, 0.85));
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: inset 0 1px 0 var(--glass-edge),
                0 30px 80px rgba(0, 0, 0, 0.65);
    transform: translateY(12px) scale(0.98);
    transition: transform 0.4s cubic-bezier(0.2, 0.9, 0.25, 1);
}

.contact-modal.open .contact-modal-panel {
    transform: translateY(0) scale(1);
}

.contact-modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 0.5px solid var(--glass-edge);
    border-radius: 50%;
    color: var(--muted);
    cursor: pointer;
    transition: color 0.2s ease, border-color 0.25s ease,
                background 0.25s ease;
}

.contact-modal-close svg { width: 16px; height: 16px; }

.contact-modal-close:hover {
    color: var(--fg);
    border-color: color-mix(in srgb, var(--purple) 60%, var(--glass-edge));
    background: color-mix(in srgb, var(--purple) 18%, transparent);
}

.contact-modal-title {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--fg);
    margin-bottom: 22px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.contact-field-label {
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--muted);
}

.contact-field input,
.contact-field textarea {
    width: 100%;
    font: inherit;
    color: var(--fg);
    padding: 11px 14px;
    border: 0.5px solid var(--glass-edge);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.04);
    resize: vertical;
    transition: border-color 0.2s ease, box-shadow 0.2s ease,
                background 0.2s ease;
}

.contact-field textarea { min-height: 110px; line-height: 1.5; }

.contact-field input:focus,
.contact-field textarea:focus {
    outline: none;
    border-color: color-mix(in srgb, var(--purple) 60%, var(--glass-edge));
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--purple) 28%, transparent);
}

.contact-submit {
    align-self: flex-start;
    margin-top: 4px;
    padding: 11px 24px;
    font: inherit;
    font-weight: 600;
    color: #fff;
    cursor: pointer;
    border: 0.5px solid color-mix(in srgb, var(--purple) 70%, var(--glass-edge));
    border-radius: var(--radius-pill);
    background: linear-gradient(135deg, var(--purple), var(--blue));
    box-shadow: 0 8px 24px color-mix(in srgb, var(--purple) 38%, transparent);
    transition: transform 0.2s ease, box-shadow 0.3s ease;
}

.contact-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 30px color-mix(in srgb, var(--purple) 50%, transparent);
}

.contact-form-note {
    margin-top: 4px;
    font-size: 0.78rem;
    color: var(--dim);
}

body.modal-open { overflow: hidden; }