/* ── Reset & Base ─────────────────────────────────── */
    *, *::before, *::after {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    body {
        overflow-x: hidden;
    }

    ::selection {
        background: rgba(13, 148, 136, 0.15);
        color: #134e4a;
    }

    /* ── Hero Gradient ────────────────────────────────── */
    .hero-gradient {
        background: linear-gradient(
            135deg,
            #042f2e 0%,
            #134e4a 20%,
            #0f766e 40%,
            #1e293b 70%,
            #0f172a 100%
        );
    }

    /* ── Navbar ───────────────────────────────────────── */
    #navbar {
        background: transparent;
    }

    #navbar.scrolled {
        background: rgba(2, 6, 23, 0.92);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
    }

    #navbar.scrolled .nav-link,
    #navbar.scrolled .hero-btn-secondary {
        color: rgba(255, 255, 255, 0.85);
    }

    /* ── Hero Animations ─────────────────────────────── */
    .hero-subtitle {
        opacity: 0;
        animation: fadeSlideUp 1s ease 0.3s forwards;
    }

    .hero-title {
        opacity: 0;
        animation: fadeSlideUp 1.1s ease 0.5s forwards;
    }

    .hero-title span {
        display: block;
        opacity: 0;
        animation: fadeSlideUp 1.1s ease forwards;
    }

    .hero-title span:nth-child(1) { animation-delay: 0.6s; }
    .hero-title span:nth-child(2) { animation-delay: 0.8s; }
    .hero-title span:nth-child(3) { animation-delay: 1.0s; }

    .hero-description {
        opacity: 0;
        animation: fadeSlideUp 1s ease 1.3s forwards;
    }

    .hero-cta {
        opacity: 0;
        animation: fadeSlideUp 1s ease 1.5s forwards;
    }

    @keyframes fadeSlideUp {
        from {
            opacity: 0;
            transform: translateY(24px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* ── Hero Buttons ─────────────────────────────────── */
    .hero-btn-primary {
        background: transparent;
        backdrop-filter: blur(4px);
    }

    .hero-btn-primary:hover {
        background: rgba(255, 255, 255, 0.1);
        backdrop-filter: blur(8px);
    }

    /* ── Scroll Indicator ─────────────────────────────── */
    @keyframes scrollPulse {
        0%, 100% { opacity: 0.4; transform: translateY(0); }
        50% { opacity: 0.8; transform: translateY(6px); }
    }

    .scroll-indicator {
        animation: scrollPulse 2.5s ease-in-out infinite;
    }

    /* ── Section Labels ───────────────────────────────── */
    .section-label {
        letter-spacing: 0.3em;
    }

    /* ── Divider Lines ────────────────────────────────── */
    .divider-line {
        height: 1px;
        background: linear-gradient(
            to right,
            transparent,
            #e2e8f0 20%,
            #e2e8f0 80%,
            transparent
        );
    }

    /* ── Reveal Animations (below the fold only) ─────── */
    .reveal {
        will-change: transform;
    }

    @media (prefers-reduced-motion: no-preference) {
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                        transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        .reveal.revealed {
            opacity: 1;
            transform: translateY(0);
        }

        .reveal:nth-child(2) { transition-delay: 0.1s; }
        .reveal:nth-child(3) { transition-delay: 0.2s; }
    }

    /* ── Mobile Menu ──────────────────────────────────── */
    #mobile-menu.open {
        opacity: 1;
        pointer-events: all;
    }

    #mobile-menu.open .mobile-link {
        opacity: 1;
        transform: translateY(0);
    }

    .mobile-link {
        opacity: 0;
        transform: translateY(12px);
        transition: opacity 0.4s ease, transform 0.4s ease, color 0.3s ease;
    }

    .mobile-link:nth-child(1) { transition-delay: 0.1s; }
    .mobile-link:nth-child(2) { transition-delay: 0.15s; }
    .mobile-link:nth-child(3) { transition-delay: 0.2s; }
    .mobile-link:nth-child(4) { transition-delay: 0.25s; }
    .mobile-link:nth-child(5) { transition-delay: 0.3s; }

    /* ── Menu Toggle ──────────────────────────────────── */
    #menu-toggle.active .menu-line:nth-child(1) {
        transform: rotate(45deg);
        top: 5px;
    }

    #menu-toggle.active .menu-line:nth-child(2) {
        opacity: 0;
    }

    #menu-toggle.active .menu-line:nth-child(3) {
        transform: rotate(-45deg);
        top: auto;
        bottom: 5px;
    }

    /* ── Contact Inputs ───────────────────────────────── */
    .contact-input {
        border: none;
        border-bottom: 1px solid #e2e8f0;
        padding: 12px 0;
        font-family: 'Inter', system-ui, sans-serif;
        font-size: 0.9375rem;
        font-weight: 300;
        color: #1e293b;
        background: transparent;
        outline: none;
        transition: border-color 0.3s ease;
        width: 100%;
    }

    .contact-input::placeholder {
        color: #cbd5e1;
    }

    .contact-input:focus {
        border-bottom-color: #0d9488;
    }

    .contact-submit {
        letter-spacing: 0.2em;
    }

    .contact-submit:hover {
        letter-spacing: 0.25em;
    }

    /* ── Testimonial Slider ───────────────────────────── */
    .testimonial-slide {
        opacity: 0;
        transform: translateY(16px);
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        transition: opacity 0.6s ease, transform 0.6s ease;
        pointer-events: none;
    }

    .testimonial-slide.active {
        opacity: 1;
        transform: translateY(0);
        position: relative;
        pointer-events: all;
    }

    .testimonial-dot {
        cursor: pointer;
        transition: background-color 0.4s ease, transform 0.3s ease;
    }

    .testimonial-dot:hover {
        transform: scale(1.3);
    }

    .testimonial-dot.active {
        background-color: #0d9488;
        transform: scale(1.2);
    }

    /* ── Utility ──────────────────────────────────────── */
    @media (prefers-reduced-motion: reduce) {
        *, *::before, *::after {
            animation-duration: 0.01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 0.01ms !important;
        }

        html {
            scroll-behavior: auto;
        }

        .reveal {
            opacity: 1;
            transform: none;
        }
    }

    /* ── Focus Styles ─────────────────────────────────── */
    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    textarea:focus-visible {
        outline: 2px solid #0d9488;
        outline-offset: 2px;
    }

    /* ── Mobile Adjustments ───────────────────────────── */
    @media (max-width: 767px) {
        .hero-title {
            font-size: 2.5rem;
        }

        .hero-title span {
            font-size: 2.5rem;
        }
    }