/* ===================================
    LIGHT THEME (default)
=================================== */
:root,
[data-theme="light"] {
    --bg: #f0f4ff;
    --bg-alt: #e6ecff;
    --surface: #ffffff;
    --surface2: #edf0fb;
    --border: rgba(0, 0, 0, 0.09);
    --text: #0b1230;
    --text2: #5560880;
    --text-muted: #7a85aa;
    --accent: #1a5fff;
    --accent-h: #3472ff;
    --accent-glow: rgba(26, 95, 255, 0.16);
    --cyan: #1a5fff;
    --ring-track: rgba(0, 0, 0, 0.08);
    --card-shadow: 0 4px 32px rgba(26, 95, 255, 0.11);
    --hover-shadow: 0 8px 40px rgba(26, 95, 255, 0.18);
    --star: #f59e0b;
    --check: #0a7c3e;
    --cross: #c0392b;
    --table-stripe: #f5f7ff;
    --nav-bg: rgba(240, 244, 255, 0.93);
    --nav-border: rgba(0, 0, 0, 0.07);
    --toggle-track: #c8d4ff;
    --badge-bg: rgba(26, 95, 255, 0.09);
    --badge-border: rgba(26, 95, 255, 0.25);
    --badge-text: #1a5fff;
    --step-num-bg: rgba(26, 95, 255, 0.1);
    --step-num-b: rgba(26, 95, 255, 0.28);
    --pill-bg: #ffffff;
}

/* ===================================
    DARK THEME
=================================== */
[data-theme="dark"] {
    --bg: #060f2c;
    --bg-alt: #0a1840;
    --surface: #0d1d50;
    --surface2: #111f55;
    --border: rgba(255, 255, 255, 0.07);
    --text: #f0f4ff;
    --text2: #8492b0;
    --text-muted: #6272a0;
    --accent: #1e6bff;
    --accent-h: #3d83ff;
    --accent-glow: rgba(30, 107, 255, 0.22);
    --cyan: #00d4ff;
    --ring-track: rgba(255, 255, 255, 0.08);
    --card-shadow: 0 4px 32px rgba(30, 107, 255, 0.18);
    --hover-shadow: 0 8px 44px rgba(30, 107, 255, 0.26);
    --star: #ffd700;
    --check: #00e676;
    --cross: #ff5252;
    --table-stripe: #0f2260;
    --nav-bg: rgba(6, 15, 44, 0.93);
    --nav-border: rgba(255, 255, 255, 0.06);
    --toggle-track: #1e3a8a;
    --badge-bg: rgba(0, 212, 255, 0.1);
    --badge-border: rgba(0, 212, 255, 0.28);
    --badge-text: #00d4ff;
    --step-num-bg: rgba(30, 107, 255, 0.18);
    --step-num-b: rgba(30, 107, 255, 0.4);
    --pill-bg: #0d1d50;
}

/* ===================================
    RESET & BASE
=================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "DM Sans", sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    transition:
        background 0.3s,
        color 0.3s;
}

/* ===================================
    NAV
=================================== */
nav {
    position: sticky;
    top: 0;
    z-index: 200;
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--nav-border);
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    transition:
        background 0.3s,
        border-color 0.3s;
}

.nav-logo {
    font-family: "Sora", sans-serif;
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-logo em {
    font-style: normal;
    color: var(--accent);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-muted);
    font-size: 0.87rem;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--text);
}

.nav-cta {
    background: var(--accent) !important;
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.84rem;
    font-weight: 700;
    text-decoration: none;
    transition:
        background 0.2s,
        transform 0.15s;
    white-space: nowrap;
}

.nav-cta:hover {
    background: var(--accent-h) !important;
    transform: translateY(-1px);
}

/* theme toggle */
.theme-btn {
    width: 52px;
    height: 28px;
    border-radius: 50px;
    background: var(--toggle-track);
    border: none;
    cursor: pointer;
    position: relative;
    transition: background 0.3s;
    flex-shrink: 0;
}

.theme-btn::after {
    content: "";
    position: absolute;
    top: 4px;
    left: 4px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
    transition: transform 0.3s;
}

[data-theme="dark"] .theme-btn::after {
    transform: translateX(24px);
}

.t-icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 11px;
    pointer-events: none;
    transition: opacity 0.25s;
    line-height: 1;
}

.t-sun {
    left: 7px;
    opacity: 1;
}

.t-moon {
    right: 6px;
    opacity: 0;
}

[data-theme="dark"] .t-sun {
    opacity: 0;
}

[data-theme="dark"] .t-moon {
    opacity: 1;
}

/* hamburger */
.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
}

.hamburger span {
    width: 23px;
    height: 2px;
    background: var(--text);
    display: block;
    border-radius: 2px;
    transition: 0.3s;
}

@media (max-width: 700px) {
    .nav-links {
        display: none;
    }

    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--surface);
        padding: 18px 28px;
        gap: 14px;
        border-bottom: 1px solid var(--border);
        z-index: 199;
    }

    .hamburger {
        display: flex;
    }
}

/* ===================================
    HERO
=================================== */
.hero {
    min-height: calc(100vh - 64px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 20px 50px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(ellipse 80% 55% at 50% 0%,
            var(--accent-glow) 0%,
            transparent 68%);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--badge-bg);
    border: 1px solid var(--badge-border);
    color: var(--badge-text);
    border-radius: 50px;
    padding: 6px 18px;
    font-size: 0.79rem;
    font-weight: 700;
    margin-bottom: 22px;
    letter-spacing: 0.05em;
    position: relative;
}

.hero h1 {
    font-family: "Sora", sans-serif;
    font-size: clamp(2rem, 6vw, 3.7rem);
    font-weight: 800;
    line-height: 1.1;
    max-width: 660px;
    margin-bottom: 14px;
    position: relative;
}

.hero h1 em {
    font-style: normal;
    color: var(--accent);
}

.hero>p {
    color: var(--text-muted);
    max-width: 500px;
    font-size: 1.03rem;
    line-height: 1.75;
    margin-bottom: 48px;
    position: relative;
}

/* ===================================
    CLEANER CARD - transparent, blends with page bg
=================================== */
.cleaner-card {
    background: transparent;
    border: none;
    box-shadow: none;
    border-radius: 28px;
    padding: 40px 36px;
    width: 100%;
    max-width: 424px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    position: relative;
    overflow: hidden;
}

/* ring */
.ring-wrap {
    position: relative;
    width: 172px;
    height: 172px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ring-svg {
    position: absolute;
    inset: 0;
    transform: rotate(-90deg);
}

.ring-bg {
    fill: none;
    stroke: var(--ring-track);
    stroke-width: 9;
}

.ring-fg {
    fill: none;
    stroke: var(--accent);
    stroke-width: 9;
    stroke-linecap: round;
    stroke-dasharray: 485;
    stroke-dashoffset: 485;
    transition: stroke-dashoffset 0.12s linear;
    filter: drop-shadow(0 0 7px var(--accent-glow));
}

.ring-inner {
    text-align: center;
    z-index: 1;
}

.ring-pct {
    font-family: "Sora", sans-serif;
    font-size: 2.35rem;
    font-weight: 800;
    color: var(--text);
}

.ring-sub {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.11em;
    font-weight: 600;
    margin-top: 3px;
}

/* mode tabs */
.mode-tabs {
    display: flex;
    width: 100%;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 50px;
    overflow: hidden;
    transition: background 0.3s;
}

.mode-tab {
    flex: 1;
    padding: 11px 8px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: "DM Sans", sans-serif;
    font-size: 0.87rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition:
        background 0.2s,
        color 0.2s;
}

.mode-tab.active {
    background: var(--accent);
    color: #fff;
}

/* eject btn */
.eject-btn {
    width: 100%;
    padding: 16px;
    border-radius: 50px;
    border: none;
    background: linear-gradient(135deg, var(--accent), var(--accent-h));
    color: #fff;
    font-family: "Sora", sans-serif;
    font-size: 0.98rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    cursor: pointer;
    box-shadow: 0 4px 20px var(--accent-glow);
    transition:
        transform 0.15s,
        box-shadow 0.15s,
        background 0.3s;
}

.eject-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.eject-btn:active {
    transform: translateY(0);
}

.eject-btn.running {
    background: linear-gradient(135deg, #e63946, #c1121f);
    box-shadow: 0 4px 20px rgba(230, 57, 70, 0.35);
}

/* ripple overlay */
.ripple-overlay {
    position: absolute;
    inset: 0;
    border-radius: 28px;
    pointer-events: none;
    overflow: hidden;
}

@keyframes rippleOut {
    0% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 0.55;
    }

    100% {
        transform: translate(-50%, -50%) scale(5);
        opacity: 0;
    }
}

.ripple-circle {
    position: absolute;
    border-radius: 50%;
    border: 2px solid var(--accent);
    pointer-events: none;
    animation: rippleOut 1.5s ease-out forwards;
}

@keyframes floatUp {
    0% {
        transform: translateY(0) scale(1);
        opacity: 0.65;
    }

    100% {
        transform: translateY(-90px) scale(0.2);
        opacity: 0;
    }
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: var(--accent);
    pointer-events: none;
    animation: floatUp 1.3s ease-out forwards;
}

/* stars */
.stars-row {
    text-align: center;
}

.stars {
    color: var(--star);
    font-size: 1.15rem;
    letter-spacing: 2px;
}

.stars-label {
    font-size: 0.77rem;
    color: var(--text-muted);
    margin-top: 3px;
}

/* ===================================
    SECTIONS
=================================== */
section {
    padding: 86px 24px;
}

.section-alt {
    background: var(--bg-alt);
    transition: background 0.3s;
}

.section-inner {
    max-width: 900px;
    margin: 0 auto;
}

.section-label {
    color: var(--accent);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

h2 {
    font-family: "Sora", sans-serif;
    font-size: clamp(1.5rem, 4vw, 2.2rem);
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--text);
}

.subtitle {
    color: var(--text-muted);
    line-height: 1.75;
    max-width: 560px;
}

/* step cards */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(216px, 1fr));
    gap: 16px;
    margin-top: 44px;
}

.step-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 26px 22px;
    display: flex;
    flex-direction: column;
    gap: 13px;
    transition:
        transform 0.2s,
        box-shadow 0.2s,
        background 0.3s;
}

.step-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--hover-shadow);
}

.step-num {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--step-num-bg);
    border: 1px solid var(--step-num-b);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: "Sora", sans-serif;
    font-weight: 800;
    color: var(--accent);
    font-size: 0.9rem;
}

.step-card h3 {
    font-family: "Sora", sans-serif;
    font-size: 0.96rem;
    font-weight: 700;
    color: var(--text);
}

.step-card p {
    color: var(--text-muted);
    font-size: 0.86rem;
    line-height: 1.65;
}

/* table */
.table-wrap {
    overflow-x: auto;
    margin-top: 42px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 520px;
}

thead th {
    background: var(--accent);
    color: #fff;
    padding: 14px 20px;
    text-align: left;
    font-family: "Sora", sans-serif;
    font-size: 0.87rem;
    font-weight: 700;
}

tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background 0.2s;
}

tbody tr:last-child {
    border-bottom: none;
}

tbody tr:nth-child(even) {
    background: var(--table-stripe);
}

tbody tr:hover {
    background: rgba(26, 95, 255, 0.05);
}

tbody td {
    padding: 13px 20px;
    font-size: 0.86rem;
    color: var(--text-muted);
    vertical-align: middle;
}

tbody td:first-child {
    color: var(--text);
    font-weight: 600;
}

.check {
    color: var(--check);
    font-weight: 700;
}

.cross {
    color: var(--cross);
    font-weight: 700;
}

/* brands */
.brands-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 40px;
    justify-content: center;
}

.brand-pill {
    background: var(--pill-bg);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 10px 22px;
    font-size: 0.87rem;
    font-weight: 600;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
    transition:
        border-color 0.2s,
        color 0.2s,
        background 0.3s;
}

.brand-pill:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* CTA banner */
.cta-banner {
    background: linear-gradient(135deg, var(--accent), var(--accent-h));
    border-radius: 24px;
    padding: 52px 36px;
    text-align: center;
    margin-top: 56px;
    box-shadow: 0 8px 40px var(--accent-glow);
}

.cta-banner h2 {
    color: #fff;
    margin-bottom: 10px;
}

.cta-banner p {
    color: rgba(255, 255, 255, 0.78);
    margin-bottom: 28px;
}

.cta-banner a {
    display: inline-block;
    background: #fff;
    color: var(--accent);
    padding: 14px 34px;
    border-radius: 50px;
    font-family: "Sora", sans-serif;
    font-weight: 800;
    text-decoration: none;
    font-size: 0.95rem;
    transition:
        transform 0.15s,
        box-shadow 0.15s;
}

.cta-banner a:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

/* FAQ */
.faq-list {
    margin-top: 44px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition:
        background 0.3s,
        border-color 0.3s;
}

.faq-q {
    width: 100%;
    background: none;
    border: none;
    color: var(--text);
    font-family: "Sora", sans-serif;
    font-size: 0.92rem;
    font-weight: 700;
    text-align: left;
    padding: 19px 22px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
}

.faq-arrow {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--surface2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.74rem;
    transition:
        transform 0.3s,
        background 0.3s;
    color: var(--text-muted);
}

.faq-item.open .faq-arrow {
    transform: rotate(180deg);
    background: var(--accent);
    color: #fff;
}

.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.36s ease;
}

.faq-item.open .faq-a {
    max-height: 260px;
}

.faq-a p {
    padding: 0 22px 20px;
    color: var(--text-muted);
    font-size: 0.87rem;
    line-height: 1.72;
}

/* footer */
footer {
    border-top: 1px solid var(--border);
    padding: 44px 24px 34px;
    text-align: center;
    transition: border-color 0.3s;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px 28px;
    list-style: none;
    margin-bottom: 20px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.83rem;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--accent);
}

.footer-copy {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.footer-copy a {
    color: var(--accent);
    text-decoration: none;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 480px) {
    .cleaner-card {
        padding: 28px 16px;
    }

    .cta-banner {
        padding: 34px 20px;
    }
}