/* ═══════════════════════════════════════════
       WORLDVELOPERS — Custom CSS · Apple-Inspired
       Zero frameworks. Pure craft.
       ═══════════════════════════════════════════ */

    /* ── Reset ── */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { 
        scroll-behavior: smooth; 
        -webkit-font-smoothing: antialiased; 
        -moz-osx-font-smoothing: grayscale;
        font-size: 16px;
    }
    body { 
        font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        color: var(--text);
        background: var(--bg);
        line-height: 1.6;
        overflow-x: hidden;
    }
    img { max-width: 100%; display: block; }
    a { color: inherit; text-decoration: none; }
    button { cursor: pointer; border: none; background: none; font: inherit; }
    ul, ol { list-style: none; }

    /* ── Design Tokens ── */
    :root {
        /* Palette — light, airy, Apple-clean */
        --bg:          #fafafa;
        --bg-white:    #ffffff;
        --bg-subtle:   #f5f5f7;
        --bg-dark:     #1d1d1f;
        --bg-hero:     #000000;

        --text:        #1d1d1f;
        --text-secondary: #6e6e73;
        --text-tertiary:  #86868b;
        --text-inverse:   #f5f5f7;

        --accent:      #0071e3;
        --accent-hover:#0077ED;
        --accent-light:#e3f2ff;
        --gradient:    linear-gradient(135deg, #6366f1 0%, #0ea5e9 50%, #14b8a6 100%);
        --gradient-text: linear-gradient(135deg, #6366f1, #0ea5e9, #14b8a6);

        /* Layout */
        --container:   1200px;
        --container-wide: 1400px;
        --nav-h:       72px;
        --section-pad: clamp(80px, 12vw, 160px);
        --radius:      16px;
        --radius-sm:   10px;
        --radius-xs:   8px;

        /* Shadows — Apple-style layered */
        --shadow-sm:   0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
        --shadow:      0 4px 6px rgba(0,0,0,0.04), 0 2px 4px rgba(0,0,0,0.06);
        --shadow-md:   0 10px 30px rgba(0,0,0,0.06), 0 4px 10px rgba(0,0,0,0.04);
        --shadow-lg:   0 25px 60px rgba(0,0,0,0.08), 0 10px 20px rgba(0,0,0,0.04);
        --shadow-glow: 0 0 40px rgba(99,102,241,0.15);

        /* Transition */
        --ease:        cubic-bezier(0.25, 0.46, 0.45, 0.94);
        --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
        --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    /* ── Container ── */
    .container { 
        max-width: var(--container); 
        margin: 0 auto; 
        padding: 0 clamp(20px, 5vw, 40px); 
    }
    .container-wide { 
        max-width: var(--container-wide); 
        margin: 0 auto; 
        padding: 0 clamp(20px, 5vw, 40px); 
    }

    /* ── Typography — Apple-scale ── */
    .headline-hero {
        font-size: clamp(3rem, 8vw, 6.5rem);
        font-weight: 800;
        letter-spacing: -0.03em;
        line-height: 1.05;
    }
    .headline-xl {
        font-size: clamp(2.5rem, 5vw, 4.5rem);
        font-weight: 700;
        letter-spacing: -0.025em;
        line-height: 1.1;
    }
    .headline-lg {
        font-size: clamp(2rem, 4vw, 3rem);
        font-weight: 700;
        letter-spacing: -0.02em;
        line-height: 1.15;
    }
    .headline-md {
        font-size: clamp(1.5rem, 2.5vw, 2rem);
        font-weight: 600;
        letter-spacing: -0.015em;
        line-height: 1.25;
    }
    .subhead {
        font-size: clamp(1.1rem, 2vw, 1.35rem);
        color: var(--text-secondary);
        line-height: 1.5;
        font-weight: 400;
    }
    .overline {
        font-size: 0.8rem;
        font-weight: 600;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--accent);
    }
    .gradient-text {
        background: var(--gradient-text);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    /* ── Sections ── */
    .section { padding: var(--section-pad) 0; }
    .section-dark { 
        background: var(--bg-dark); 
        color: var(--text-inverse); 
    }
    .section-dark .subhead,
    .section-dark .text-secondary { color: #86868b; }
    .section-subtle { background: var(--bg-subtle); }
    .section-white { background: var(--bg-white); }

    /* ── Navigation — Apple glass ── */
    .nav {
        position: fixed; top: 0; left: 0; right: 0;
        height: var(--nav-h);
        z-index: 100;
        background: rgba(255,255,255, 0.72);
        backdrop-filter: saturate(180%) blur(20px);
        -webkit-backdrop-filter: saturate(180%) blur(20px);
        border-bottom: 1px solid rgba(0,0,0,0.06);
        transition: background 0.3s, box-shadow 0.3s;
    }
    .nav.scrolled {
        background: rgba(255,255,255, 0.92);
        box-shadow: 0 1px 20px rgba(0,0,0,0.06);
    }
    /* Nav on dark panels (home page) */
    .nav.nav-on-dark:not(.scrolled) {
        background: rgba(0,0,0,0.3);
        border-bottom-color: rgba(255,255,255,0.06);
    }
    .nav.nav-on-dark:not(.scrolled) .nav-brand span,
    .nav.nav-on-dark:not(.scrolled) .nav-link {
        color: rgba(255,255,255,0.85);
    }
    .nav.nav-on-dark:not(.scrolled) .nav-link:hover,
    .nav.nav-on-dark:not(.scrolled) .nav-link.active {
        color: #fff;
    }
    .nav.nav-on-dark:not(.scrolled) .nav-toggle span {
        background: #f5f5f7;
    }
    .nav.nav-on-dark:not(.scrolled) .nav-dropdown-menu {
        background: rgba(30,30,30,0.95);
    }
    .nav.nav-on-dark:not(.scrolled) .nav-dropdown-item:hover {
        background: rgba(255,255,255,0.06);
    }
    .nav.nav-on-dark:not(.scrolled) .nav-dropdown-text strong {
        color: #f5f5f7;
    }
    .nav.nav-on-dark:not(.scrolled) .nav-dropdown-text span {
        color: #86868b;
    }
    .nav-inner {
        max-width: var(--container-wide);
        margin: 0 auto;
        padding: 0 clamp(20px, 5vw, 40px);
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
    }
    .nav-brand {
        display: flex; align-items: center; gap: 10px;
        font-weight: 700; font-size: 1.2rem;
        transition: opacity 0.2s;
    }
    .nav-brand:hover { opacity: 0.7; }
    .nav-brand-icon {
        width: 36px; height: 36px; border-radius: 10px;
        background: var(--gradient);
        display: flex; align-items: center; justify-content: center;
        color: #fff; font-weight: 800; font-size: 1rem;
        transition: transform 0.3s var(--ease-spring);
    }
    .nav-brand:hover .nav-brand-icon { transform: rotate(10deg) scale(1.05); }

    .nav-links { display: flex; align-items: center; gap: 32px; }
    .nav-link {
        font-size: 0.9rem; font-weight: 500;
        color: var(--text-secondary);
        transition: color 0.2s;
        position: relative;
    }
    .nav-link:hover, .nav-link.active { color: var(--text); }
    .nav-link.active::after {
        content: ''; position: absolute;
        bottom: -6px; left: 50%; transform: translateX(-50%);
        width: 4px; height: 4px; border-radius: 50%;
        background: var(--accent);
    }

    /* Nav dropdown */
    .nav-dropdown { position: relative; }
    .nav-dropdown-menu {
        position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
        min-width: 280px; padding: 12px;
        background: rgba(255,255,255,0.96);
        backdrop-filter: blur(30px);
        border-radius: var(--radius);
        box-shadow: var(--shadow-lg), 0 0 0 1px rgba(0,0,0,0.04);
        opacity: 0; visibility: hidden;
        transform: translateX(-50%) translateY(8px);
        transition: all 0.25s var(--ease-out);
        margin-top: 12px;
    }
    .nav-dropdown:hover .nav-dropdown-menu {
        opacity: 1; visibility: visible;
        transform: translateX(-50%) translateY(0);
    }
    .nav-dropdown-item {
        display: flex; align-items: center; gap: 12px;
        padding: 10px 14px; border-radius: var(--radius-xs);
        transition: background 0.15s;
    }
    .nav-dropdown-item:hover { background: var(--bg-subtle); }
    .nav-dropdown-icon {
        width: 40px; height: 40px; border-radius: var(--radius-xs);
        display: flex; align-items: center; justify-content: center;
        font-size: 1.2rem; flex-shrink: 0;
    }
    .nav-dropdown-text strong { display: block; font-size: 0.88rem; font-weight: 600; }
    .nav-dropdown-text span { font-size: 0.76rem; color: var(--text-tertiary); }

    /* CTA Button */
    .btn {
        display: inline-flex; align-items: center; gap: 8px;
        padding: 12px 28px;
        font-weight: 600; font-size: 0.95rem;
        border-radius: 980px; /* Apple pill */
        transition: all 0.3s var(--ease);
    }
    .btn-primary {
        background: var(--accent); color: #fff;
    }
    .btn-primary:hover { 
        background: var(--accent-hover); 
        transform: scale(1.02); 
        box-shadow: 0 4px 20px rgba(0,113,227,0.3);
    }
    .btn-secondary {
        background: transparent; color: var(--accent);
    }
    .btn-secondary:hover { background: var(--accent-light); }
    .btn-dark {
        background: var(--bg-dark); color: #fff;
    }
    .btn-dark:hover { 
        background: #333; 
        transform: scale(1.02); 
    }
    .btn-outline {
        border: 1.5px solid rgba(0,0,0,0.12); color: var(--text);
    }
    .btn-outline:hover { 
        border-color: var(--accent); color: var(--accent);
        box-shadow: var(--shadow-sm);
    }
    .btn-white { background: #fff; color: var(--text); }
    .btn-white:hover { 
        background: #f0f0f0; 
        transform: scale(1.02); 
        box-shadow: var(--shadow-md); 
    }
    .btn-lg { padding: 16px 36px; font-size: 1.05rem; }
    .btn-sm { padding: 8px 20px; font-size: 0.85rem; }
    .btn-arrow::after { 
        content: '→'; margin-left: 4px; 
        transition: transform 0.2s; 
    }
    .btn-arrow:hover::after { transform: translateX(4px); }

    /* ── Cards — Apple-clean ── */
    .card {
        background: var(--bg-white);
        border-radius: var(--radius);
        border: 1px solid rgba(0,0,0,0.06);
        padding: clamp(28px, 4vw, 40px);
        transition: all 0.4s var(--ease);
    }
    .card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
        border-color: transparent;
    }
    .card-icon {
        width: 56px; height: 56px;
        border-radius: var(--radius-sm);
        display: flex; align-items: center; justify-content: center;
        font-size: 1.6rem;
        margin-bottom: 20px;
    }

    /* ── Grid ── */
    .grid { display: grid; gap: clamp(20px, 3vw, 32px); }
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-4 { grid-template-columns: repeat(4, 1fr); }
    @media (max-width: 1024px) { 
        .grid-4 { grid-template-columns: repeat(2, 1fr); }
        .grid-3 { grid-template-columns: repeat(2, 1fr); } 
    }
    @media (max-width: 640px) { 
        .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } 
    }

    /* ── Scroll Reveal — the Apple magic ── */
    .reveal {
        opacity: 0;
        transform: translateY(40px);
        transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
    }
    .reveal.visible {
        opacity: 1;
        transform: translateY(0);
    }
    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
    .reveal-delay-4 { transition-delay: 0.4s; }
    .reveal-delay-5 { transition-delay: 0.5s; }
    
    .reveal-scale {
        opacity: 0;
        transform: scale(0.92);
        transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
    }
    .reveal-scale.visible { opacity: 1; transform: scale(1); }
    
    .reveal-left {
        opacity: 0;
        transform: translateX(-50px);
        transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
    }
    .reveal-left.visible { opacity: 1; transform: translateX(0); }
    
    .reveal-right {
        opacity: 0;
        transform: translateX(50px);
        transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
    }
    .reveal-right.visible { opacity: 1; transform: translateX(0); }

    /* ── Step visual elements (used in home panels) ── */
    .step-number {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 36px; height: 36px;
        border-radius: 50%;
        background: var(--accent);
        color: #fff;
        font-size: 0.82rem;
        font-weight: 700;
        margin-bottom: 20px;
    }
    .step-visual {
        aspect-ratio: 4/3;
        border-radius: 24px;
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        overflow: hidden;
    }
    .step-visual span {
        font-size: 5rem;
        transition: transform 0.6s var(--ease-out);
    }

    /* ── Hero — full-screen Apple dark ── */
    .hero {
        min-height: 100vh;
        display: flex; align-items: center; justify-content: center;
        text-align: center;
        background: var(--bg-hero);
        color: #fff;
        position: relative;
        overflow: hidden;
    }
    .hero-inner { 
        position: relative; z-index: 2;
        padding: 120px 20px 80px;
    }
    .hero-bg-glow {
        position: absolute;
        width: 800px; height: 800px;
        border-radius: 50%;
        filter: blur(120px);
        opacity: 0.3;
        pointer-events: none;
    }
    .hero .subhead { color: #86868b; }

    /* ── Page hero (sub-pages) ── */
    .page-hero {
        padding: calc(var(--nav-h) + 60px) 0 60px;
        text-align: center;
        background: var(--bg-subtle);
    }
    .page-hero .overline { margin-bottom: 12px; }
    .page-hero .subhead { max-width: 600px; margin: 16px auto 0; }

    /* ── Forms ── */
    .form-group { margin-bottom: 20px; }
    .form-label { 
        display: block; font-size: 0.85rem; font-weight: 600; 
        margin-bottom: 8px; color: var(--text); 
    }
    .form-input {
        width: 100%; padding: 14px 18px;
        font-size: 0.95rem; font-family: inherit;
        background: var(--bg-white);
        border: 1.5px solid rgba(0,0,0,0.1);
        border-radius: var(--radius-sm);
        transition: border-color 0.2s, box-shadow 0.2s;
        outline: none; color: var(--text);
    }
    .form-input:focus {
        border-color: var(--accent);
        box-shadow: 0 0 0 4px rgba(0,113,227,0.1);
    }
    .form-input::placeholder { color: var(--text-tertiary); }
    select.form-input { appearance: none; cursor: pointer; }
    textarea.form-input { resize: vertical; min-height: 140px; }

    /* ── Tags / Chips ── */
    .tag {
        display: inline-block;
        padding: 4px 12px;
        font-size: 0.75rem; font-weight: 500;
        border-radius: 980px;
        background: var(--bg-subtle);
        color: var(--text-secondary);
        border: 1px solid rgba(0,0,0,0.04);
    }
    .tag-accent {
        background: var(--accent-light); 
        color: var(--accent);
        border-color: transparent;
    }

    /* ── Progress bar (scroll) ── */
    .scroll-progress {
        position: fixed; top: 0; left: 0;
        height: 3px; z-index: 200;
        background: var(--gradient);
        width: 0%; 
        transition: width 0.05s linear;
    }

    /* ── Mobile nav ── */
    .nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
    .nav-toggle span {
        width: 22px; height: 2px; background: var(--text);
        border-radius: 2px; transition: all 0.3s;
    }
    .nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .nav-toggle.open span:nth-child(2) { opacity: 0; }
    .nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

    .mobile-menu {
        position: fixed; inset: 0; top: var(--nav-h);
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(20px);
        z-index: 99;
        padding: 40px 24px;
        transform: translateX(100%);
        transition: transform 0.4s var(--ease-out);
    }
    .mobile-menu.open { transform: translateX(0); }
    .mobile-menu a {
        display: block; padding: 16px 0;
        font-size: 1.3rem; font-weight: 600;
        border-bottom: 1px solid rgba(0,0,0,0.06);
    }

    @media (max-width: 900px) {
        .nav-links { display: none; }
        .nav-toggle { display: flex; }
    }

    /* ── Preloader ── */
    .preloader {
        position: fixed; inset: 0; z-index: 9999;
        background: #fff;
        display: flex; align-items: center; justify-content: center;
        transition: opacity 0.5s, visibility 0.5s;
    }
    .preloader.loaded { opacity: 0; visibility: hidden; }
    .preloader-logo {
        width: 48px; height: 48px; border-radius: 12px;
        background: var(--gradient);
        display: flex; align-items: center; justify-content: center;
        color: #fff; font-weight: 800; font-size: 1.2rem;
        animation: pulse-loader 1s ease-in-out infinite;
    }
    @keyframes pulse-loader {
        0%,100% { transform: scale(1); opacity: 1; }
        50% { transform: scale(1.15); opacity: 0.7; }
    }

    /* ── Cookie banner ── */
    .cookie-bar {
        position: fixed; bottom: 24px; left: 24px; right: 24px;
        max-width: 440px; z-index: 90;
        background: var(--bg-white);
        border-radius: var(--radius);
        box-shadow: var(--shadow-lg);
        border: 1px solid rgba(0,0,0,0.06);
        padding: 20px 24px;
        transform: translateY(150%);
        transition: transform 0.5s var(--ease-out);
    }
    .cookie-bar.show { transform: translateY(0); }

    /* ── Back to top ── */
    .back-top {
        position: fixed; bottom: 28px; right: 28px; z-index: 80;
        width: 44px; height: 44px; border-radius: 50%;
        background: var(--bg-white);
        box-shadow: var(--shadow-md);
        border: 1px solid rgba(0,0,0,0.06);
        display: flex; align-items: center; justify-content: center;
        opacity: 0; visibility: hidden; transform: translateY(10px);
        transition: all 0.3s var(--ease);
    }
    .back-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
    .back-top:hover { 
        transform: translateY(-3px); 
        box-shadow: var(--shadow-lg); 
    }
    .back-top svg { width: 18px; height: 18px; color: var(--text); }

    /* ── Utility ── */
    .text-center { text-align: center; }
    .text-secondary { color: var(--text-secondary); }
    .text-accent { color: var(--accent); }
    .mx-auto { margin-left: auto; margin-right: auto; }
    .mt-s { margin-top: 12px; }
    .mt-m { margin-top: 24px; }
    .mt-l { margin-top: 48px; }
    .mt-xl { margin-top: 80px; }
    .mb-s { margin-bottom: 12px; }
    .mb-m { margin-bottom: 24px; }
    .mb-l { margin-bottom: 48px; }
    .gap-s { gap: 12px; }
    .gap-m { gap: 24px; }
    .flex { display: flex; }
    .flex-col { flex-direction: column; }
    .items-center { align-items: center; }
    .justify-center { justify-content: center; }
    .justify-between { justify-content: space-between; }
    .flex-wrap { flex-wrap: wrap; }
    .w-full { width: 100%; }
    .max-w-narrow { max-width: 680px; }
    .max-w-mid { max-width: 900px; }
    .relative { position: relative; }
    .overflow-hidden { overflow: hidden; }
    .inline-flex { display: inline-flex; }

    /* Marquee */
    .marquee { overflow: hidden; }
    .marquee-inner,
    .marquee-track {
        display: flex; gap: 32px; width: max-content;
        animation: marquee 35s linear infinite;
    }
    .marquee-inner:hover,
    .marquee-track:hover { animation-play-state: paused; }
    .marquee-item { flex-shrink: 0; }
    @keyframes marquee { to { transform: translateX(-50%); } }

    /* Scrollbar */
    ::-webkit-scrollbar { width: 8px; }
    ::-webkit-scrollbar-track { background: transparent; }
    ::-webkit-scrollbar-thumb { background: #d1d1d6; border-radius: 4px; }
    ::-webkit-scrollbar-thumb:hover { background: #aeaeb2; }

    /* Dark section scrollbar override */
    .section-dark ::-webkit-scrollbar-thumb { background: #48484a; }