/* =========================================================
   LUMA ONE — INTERACTIVE PRODUCT LANDING PAGE
   Marsharine A. Simpson
   ========================================================= */

:root {
    --ink: #151515;
    --ink-soft: #2d2d2d;
    --paper: #f5f1e9;
    --paper-deep: #ebe4d8;
    --white: #ffffff;

    --accent: #c98b52;
    --accent-dark: #9f6737;

    --sage: #7f8d78;
    --graphite: #434343;
    --sand: #d7bb96;

    --line: rgba(21, 21, 21, 0.12);
    --muted: #716d67;

    --shadow-sm: 0 10px 30px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 24px 70px rgba(0, 0, 0, 0.1);

    --radius-sm: 14px;
    --radius-md: 24px;
    --radius-lg: 36px;

    --max-width: 1220px;
}

/* RESET */

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;

    color: var(--ink);
    background: var(--paper);

    font-family:
        Inter,
        "Segoe UI",
        Arial,
        sans-serif;

    line-height: 1.6;
}

button,
input {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button {
    cursor: pointer;
}

a {
    color: inherit;
}

img,
svg {
    max-width: 100%;
}

/* ANNOUNCEMENT */

.announcement {
    padding: 9px 20px;

    color: var(--paper);
    background: var(--ink);

    text-align: center;
}

.announcement p {
    margin: 0;

    font-size: 0.76rem;
    font-weight: 700;

    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.announcement span {
    display: inline-block;
    margin: 0 7px;

    color: var(--accent);
}

/* HEADER */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;

    border-bottom: 1px solid var(--line);

    background: rgba(245, 241, 233, 0.9);

    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.nav-container {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 30px;

    width: min(100% - 40px, var(--max-width));
    min-height: 76px;
    margin: 0 auto;
}

.brand {
    color: var(--ink);

    font-size: 1rem;
    font-weight: 900;

    letter-spacing: 0.16em;
    text-decoration: none;
}

.brand span {
    color: var(--accent-dark);
}

.main-navigation {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.main-navigation a,
.footer-links a {
    color: var(--muted);

    font-size: 0.86rem;
    font-weight: 700;

    text-decoration: none;
}

.main-navigation a:hover,
.footer-links a:hover {
    color: var(--ink);
}

.cart-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;

    padding: 9px 15px;

    border: 1px solid var(--ink);
    border-radius: 999px;

    color: var(--ink);
    background: transparent;

    font-size: 0.86rem;
    font-weight: 800;
}

.cart-button span {
    display: grid;
    place-items: center;

    min-width: 24px;
    min-height: 24px;

    border-radius: 50%;

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

    font-size: 0.72rem;
}

.menu-button {
    display: none;

    width: 42px;
    height: 42px;

    padding: 9px;

    border: 1px solid var(--line);
    border-radius: 50%;

    background: transparent;
}

.menu-button span {
    display: block;

    width: 100%;
    height: 2px;
    margin: 4px 0;

    background: var(--ink);

    transition:
        transform 0.2s ease,
        opacity 0.2s ease;
}

/* TYPOGRAPHY */

.eyebrow {
    margin: 0 0 13px;

    color: var(--accent-dark);

    font-size: 0.75rem;
    font-weight: 900;

    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.section-heading {
    max-width: 780px;
}

.section-heading h2,
.design-copy h2,
.development-section h2,
.closing-section h2 {
    margin: 0;

    color: var(--ink);

    font-family:
        Georgia,
        "Times New Roman",
        serif;

    font-size: clamp(2.4rem, 5vw, 4.8rem);
    font-weight: 500;

    letter-spacing: -0.045em;
    line-height: 0.98;
}

.section-heading h2 span,
.design-copy h2 span,
.development-section h2 span,
.closing-section h2 span {
    color: var(--accent-dark);
}

/* PRODUCT HERO */

.product-hero {
    display: grid;
    grid-template-columns: 0.95fr 1.05fr;
    align-items: center;
    gap: clamp(40px, 7vw, 90px);

    width: min(100% - 40px, var(--max-width));
    margin: 0 auto;

    padding: 90px 0 110px;
}

.hero-copy h1 {
    margin: 0;

    color: var(--ink);

    font-family:
        Georgia,
        "Times New Roman",
        serif;

    font-size: clamp(4rem, 7vw, 7rem);
    font-weight: 500;

    letter-spacing: -0.06em;
    line-height: 0.87;
}

.hero-copy h1 span {
    display: block;

    color: var(--accent-dark);
}

.hero-description {
    max-width: 630px;
    margin: 28px 0 0;

    color: var(--muted);

    font-size: 1.03rem;
}

.rating-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;

    margin-top: 26px;
}

.rating-row span {
    padding: 7px 12px;

    border: 1px solid var(--line);
    border-radius: 999px;

    background: rgba(255, 255, 255, 0.35);

    color: var(--ink-soft);

    font-size: 0.76rem;
    font-weight: 750;
}

.price-block {
    margin-top: 28px;
}

.price-label {
    display: block;

    margin-bottom: 2px;

    color: var(--muted);

    font-size: 0.78rem;
    font-weight: 700;
}

.price-block strong {
    color: var(--ink);

    font-family:
        Georgia,
        "Times New Roman",
        serif;

    font-size: 2rem;
}

/* FINISH SELECTOR */

.finish-selector {
    margin: 26px 0 0;
    padding: 0;

    border: 0;
}

.finish-selector legend {
    margin-bottom: 10px;

    color: var(--muted);

    font-size: 0.88rem;
}

.finish-selector legend strong {
    color: var(--ink);
}

.finish-options {
    display: flex;
    gap: 10px;
}

.finish-button {
    width: 42px;
    height: 42px;

    padding: 5px;

    border: 2px solid transparent;
    border-radius: 50%;

    background: transparent;
}

.finish-button span {
    display: block;

    width: 100%;
    height: 100%;

    border: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: 50%;
}

.finish-button.sand span {
    background: var(--sand);
}

.finish-button.graphite span {
    background: var(--graphite);
}

.finish-button.sage span {
    background: var(--sage);
}

.finish-button.active {
    border-color: var(--ink);
}

/* PURCHASE */

.purchase-row {
    display: flex;
    align-items: stretch;
    gap: 12px;

    margin-top: 28px;
}

.quantity-control {
    display: grid;
    grid-template-columns: 42px 44px 42px;
    align-items: center;

    border: 1px solid var(--ink);
    border-radius: 999px;

    background: rgba(255, 255, 255, 0.3);
}

.quantity-control button {
    border: 0;

    color: var(--ink);
    background: transparent;

    font-size: 1.15rem;
    font-weight: 800;
}

.quantity-control span {
    text-align: center;

    font-size: 0.9rem;
    font-weight: 800;
}

.add-button,
.source-button {
    display: inline-flex;
    justify-content: center;
    align-items: center;

    min-height: 48px;
    padding: 12px 22px;

    border: 1px solid var(--ink);
    border-radius: 999px;

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

    font-weight: 800;
    text-decoration: none;

    transition:
        transform 0.18s ease,
        background 0.18s ease;
}

.add-button:hover,
.source-button:hover {
    transform: translateY(-2px);

    background: var(--accent-dark);
}

.purchase-note {
    margin: 12px 0 0;

    color: var(--muted);

    font-size: 0.76rem;
}

.cart-message {
    min-height: 24px;
    margin: 8px 0 0;

    color: var(--accent-dark);

    font-size: 0.83rem;
    font-weight: 800;
}

/* PRODUCT VISUAL */

.product-visual {
    position: relative;

    min-height: 650px;
    overflow: hidden;

    border-radius: var(--radius-lg);

    background:
        radial-gradient(
            circle at 70% 25%,
            rgba(255, 239, 190, 0.9),
            transparent 28%
        ),
        linear-gradient(
            145deg,
            #e7d6bd,
            #cdb18b
        );

    box-shadow: var(--shadow-md);

    transition: background 0.3s ease;
}

.product-visual[data-theme="graphite"] {
    background:
        radial-gradient(
            circle at 70% 25%,
            rgba(255, 233, 181, 0.62),
            transparent 28%
        ),
        linear-gradient(
            145deg,
            #5a5a5a,
            #272727
        );
}

.product-visual[data-theme="sage"] {
    background:
        radial-gradient(
            circle at 70% 25%,
            rgba(255, 236, 181, 0.72),
            transparent 28%
        ),
        linear-gradient(
            145deg,
            #a4afa0,
            #6f7f6a
        );
}

.visual-badge {
    position: absolute;
    top: 28px;
    left: 30px;

    padding: 8px 12px;

    border: 1px solid rgba(255, 255, 255, 0.45);
    border-radius: 999px;

    color: rgba(255, 255, 255, 0.9);
    background: rgba(0, 0, 0, 0.12);

    font-size: 0.68rem;
    font-weight: 900;

    letter-spacing: 0.12em;
}

.light-glow {
    position: absolute;
    top: 120px;
    left: 50%;

    width: 300px;
    height: 300px;

    transform: translateX(-10%);

    border-radius: 50%;

    background:
        radial-gradient(
            circle,
            rgba(255, 241, 192, 0.8),
            rgba(255, 241, 192, 0.08) 55%,
            transparent 70%
        );

    filter: blur(4px);
}

.lamp {
    position: absolute;
    inset: 80px 0 70px;

    margin: auto;

    width: 380px;
    height: 500px;
}

.lamp-head {
    position: absolute;
    top: 48px;
    left: 170px;

    width: 170px;
    height: 64px;

    transform: rotate(-12deg);

    border-radius: 34px 34px 18px 18px;

    background: #2b2b2b;

    box-shadow: 0 16px 30px rgba(0, 0, 0, 0.18);
}

.lamp-light {
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 7px;

    height: 10px;

    border-radius: 999px;

    background: #ffe8a8;

    box-shadow:
        0 0 14px rgba(255, 232, 168, 0.95),
        0 0 34px rgba(255, 232, 168, 0.75);
}

.lamp-arm {
    position: absolute;

    width: 24px;

    border-radius: 999px;

    background: #323232;

    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.12);
}

.upper-arm {
    top: 110px;
    left: 210px;

    height: 165px;

    transform: rotate(18deg);
    transform-origin: top center;
}

.lower-arm {
    top: 248px;
    left: 162px;

    height: 150px;

    transform: rotate(-20deg);
    transform-origin: top center;
}

.lamp-joint {
    position: absolute;

    z-index: 2;

    width: 42px;
    height: 42px;

    border: 8px solid #323232;
    border-radius: 50%;

    background: #b6b6b6;

    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.16);
}

.top-joint {
    top: 96px;
    left: 202px;
}

.middle-joint {
    top: 250px;
    left: 168px;
}

.base-joint {
    top: 374px;
    left: 109px;
}

.lamp-base {
    position: absolute;
    left: 54px;
    bottom: 4px;

    width: 170px;
    height: 62px;

    border-radius: 50%;

    background: #2d2d2d;

    box-shadow: 0 22px 35px rgba(0, 0, 0, 0.2);
}

.touch-control {
    position: absolute;
    top: 17px;
    left: 70px;

    width: 28px;
    height: 28px;

    border: 2px solid rgba(255, 255, 255, 0.28);
    border-radius: 50%;
}

.visual-caption {
    position: absolute;
    right: 30px;
    bottom: 28px;

    display: flex;
    align-items: flex-start;
    gap: 12px;

    max-width: 230px;

    color: rgba(255, 255, 255, 0.88);
}

.visual-caption > span {
    font-size: 0.72rem;
    font-weight: 900;

    letter-spacing: 0.1em;
}

.visual-caption p {
    margin: 0;

    font-size: 0.84rem;
}

.visual-caption strong {
    display: block;

    color: var(--white);
}

/* FEATURES */

.features-section,
.specifications-section,
.faq-section {
    width: min(100% - 40px, var(--max-width));
    margin: 0 auto;

    padding: 110px 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;

    margin-top: 45px;
}

.feature-card {
    min-height: 270px;
    padding: 26px;

    border: 1px solid var(--line);
    border-radius: var(--radius-md);

    background: rgba(255, 255, 255, 0.36);

    box-shadow: var(--shadow-sm);
}

.feature-number {
    display: block;

    margin-bottom: 58px;

    color: var(--accent-dark);

    font-size: 0.76rem;
    font-weight: 900;

    letter-spacing: 0.12em;
}

.feature-card h3 {
    margin: 0 0 10px;

    font-family:
        Georgia,
        "Times New Roman",
        serif;

    font-size: 1.45rem;
    font-weight: 500;
}

.feature-card p {
    margin: 0;

    color: var(--muted);

    font-size: 0.9rem;
}

/* DESIGN STORY */

.design-section {
    padding: 20px 20px 110px;
}

.design-panel {
    display: grid;
    grid-template-columns: 1.25fr 0.75fr;
    align-items: center;
    gap: 70px;

    width: min(100%, var(--max-width));
    margin: 0 auto;

    padding: clamp(38px, 6vw, 70px);

    border-radius: var(--radius-lg);

    color: var(--white);

    background: var(--ink);

    box-shadow: var(--shadow-md);
}

.design-panel .eyebrow {
    color: #ddb487;
}

.design-copy h2 {
    color: var(--white);
}

.design-copy h2 span {
    color: #ddb487;
}

.design-copy p {
    max-width: 650px;
    margin: 24px 0 0;

    color: #c8c4be;
}

.text-link {
    display: inline-block;

    margin-top: 22px;

    color: var(--white);

    font-weight: 800;
    text-decoration: none;
}

.text-link span {
    margin-left: 5px;
}

.design-details {
    display: grid;
    gap: 24px;
}

.design-details div {
    padding-bottom: 20px;

    border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.design-details div:last-child {
    border-bottom: 0;
}

.design-details strong {
    display: block;

    color: #ddb487;

    font-family:
        Georgia,
        "Times New Roman",
        serif;

    font-size: 2.5rem;
}

.design-details span {
    color: #c8c4be;

    font-size: 0.86rem;
}

/* SPECIFICATIONS */

.specification-list {
    margin-top: 46px;

    border-top: 1px solid var(--line);
}

.specification-row {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 40px;

    padding: 20px 0;

    border-bottom: 1px solid var(--line);
}

.specification-row span {
    color: var(--muted);

    font-size: 0.84rem;
    font-weight: 700;
}

.specification-row strong {
    color: var(--ink);

    font-size: 0.94rem;
}

/* DEVELOPMENT */

.development-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;

    padding: 110px max(20px, calc((100vw - var(--max-width)) / 2));

    background: var(--paper-deep);
}

.technology-grid {
    display: grid;
    gap: 18px;
}

.technology-grid article {
    padding: 22px 0;

    border-bottom: 1px solid var(--line);
}

.technology-grid article:last-child {
    border-bottom: 0;
}

.technology-grid strong {
    display: block;

    margin-bottom: 5px;

    color: var(--ink);

    font-size: 1rem;
}

.technology-grid p {
    margin: 0;

    color: var(--muted);

    font-size: 0.9rem;
}

/* FAQ */

.faq-list {
    margin-top: 46px;
}

.faq-item {
    border-top: 1px solid var(--line);
}

.faq-item:last-child {
    border-bottom: 1px solid var(--line);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;

    width: 100%;
    padding: 22px 0;

    border: 0;

    color: var(--ink);
    background: transparent;

    text-align: left;

    font-size: 1rem;
    font-weight: 800;
}

.faq-icon {
    display: grid;
    place-items: center;

    min-width: 34px;
    min-height: 34px;

    border: 1px solid var(--line);
    border-radius: 50%;

    transition: transform 0.2s ease;
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    display: none;

    max-width: 800px;
    padding: 0 0 24px;
}

.faq-answer p {
    margin: 0;

    color: var(--muted);
}

.faq-item.open .faq-answer {
    display: block;
}

/* CLOSING CTA */

.closing-section {
    width: min(100% - 40px, var(--max-width));
    margin: 0 auto;

    padding: 80px 0 120px;

    text-align: center;
}

.closing-section h2 {
    max-width: 850px;
    margin: 0 auto;
}

.closing-section > p:not(.eyebrow) {
    max-width: 640px;
    margin: 24px auto 26px;

    color: var(--muted);
}

/* FOOTER */

.site-footer {
    padding: 38px 20px;

    color: #d3d0ca;
    background: var(--ink);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 28px;

    width: min(100%, var(--max-width));
    margin: 0 auto;
}

.footer-inner p {
    margin: 0;
}

.footer-name {
    margin-bottom: 4px !important;

    color: var(--white);

    font-weight: 900;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 20px;
}

.footer-links a {
    color: #d3d0ca;
}

/* ACCESSIBILITY */

button:focus-visible,
a:focus-visible {
    outline: 3px solid rgba(201, 139, 82, 0.5);
    outline-offset: 4px;
}

/* TABLET */

@media (max-width: 960px) {

    .product-hero {
        grid-template-columns: 1fr;

        padding-top: 70px;
    }

    .product-visual {
        min-height: 600px;
    }

    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .design-panel,
    .development-section {
        grid-template-columns: 1fr;

        gap: 45px;
    }

}

/* MOBILE NAV */

@media (max-width: 760px) {

    .nav-container {
        grid-template-columns: auto auto auto;
    }

    .menu-button {
        display: block;

        justify-self: center;
    }

    .main-navigation {
        position: absolute;
        top: 76px;
        left: 0;

        display: none;
        flex-direction: column;
        gap: 0;

        width: 100%;

        border-bottom: 1px solid var(--line);

        background: var(--paper);

        box-shadow: var(--shadow-sm);
    }

    .main-navigation.open {
        display: flex;
    }

    .main-navigation a {
        padding: 16px 24px;

        border-bottom: 1px solid var(--line);
    }

}

/* SMALL MOBILE */

@media (max-width: 620px) {

    .announcement p {
        font-size: 0.66rem;
    }

    .nav-container {
        width: min(100% - 24px, var(--max-width));

        gap: 10px;
    }

    .brand {
        font-size: 0.88rem;
    }

    .cart-button {
        padding: 8px 11px;
    }

    .product-hero,
    .features-section,
    .specifications-section,
    .faq-section,
    .closing-section {
        width: min(100% - 28px, var(--max-width));
    }

    .product-hero {
        padding: 54px 0 80px;
    }

    .hero-copy h1 {
        font-size: clamp(3.5rem, 18vw, 5.6rem);
    }

    .purchase-row {
        flex-direction: column;
        align-items: stretch;
    }

    .quantity-control {
        width: fit-content;
    }

    .add-button {
        width: 100%;
    }

    .product-visual {
        min-height: 500px;
    }

    .lamp {
        transform: scale(0.8);
        transform-origin: center bottom;
    }

    .visual-caption {
        right: 20px;
        bottom: 20px;
    }

    .features-section,
    .specifications-section,
    .faq-section {
        padding: 80px 0;
    }

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

    .feature-card {
        min-height: auto;
    }

    .feature-number {
        margin-bottom: 34px;
    }

    .design-section {
        padding: 0 14px 80px;
    }

    .design-panel {
        padding: 34px 24px;

        border-radius: 26px;
    }

    .specification-row {
        grid-template-columns: 1fr;

        gap: 4px;
    }

    .development-section {
        padding: 80px 20px;
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }

}

/* REDUCED MOTION */

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;

        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }

}