@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    color-scheme: light dark;
    --color-bg: #f5f7fb;
    --color-surface: #ffffff;
    --color-accent: #005bff;
    --color-accent-soft: rgba(0, 91, 255, 0.1);
    --color-text: #1b2845;
    --color-muted: #5a6885;
    --color-border: #d7ddef;
    --color-highlight: #00a0e3;
    --max-width: 1200px;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow-lg: 0 30px 60px rgba(0, 30, 80, 0.08);
    --shadow-md: 0 16px 32px rgba(0, 50, 120, 0.08);
    --shadow-sm: 0 8px 16px rgba(0, 25, 60, 0.06);
    --font-primary: "Inter", "Segoe UI", Arial, sans-serif;
    --transition-base: all 0.3s ease;
}

* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-primary);
    background: var(--color-bg);
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
}

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

a:hover,
a:focus {
    color: var(--color-accent);
}

img {
    max-width: 100%;
    display: block;
    border-radius: var(--radius-md);
}

.container {
    width: min(100% - 2rem, var(--max-width));
    margin-inline: auto;
}

main.main-content {
    padding-block: 3.5rem 4.5rem;
}

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

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(14px);
    background: rgba(245, 247, 251, 0.88);
    border-bottom: 1px solid rgba(215, 221, 239, 0.7);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    padding-block: 0.9rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: 0.04em;
    color: var(--color-accent);
}

.brand__mark {
    width: 44px;
    height: 44px;
    display: inline-flex;
    border-radius: 14px;
    background: linear-gradient(135deg, #005bff, #00a0e3);
    box-shadow: var(--shadow-sm);
    padding: 8px;
}

.brand__mark {
    object-fit: contain;
}

.brand__text {
    color: var(--color-text);
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle__bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    margin: 4px 0;
    transition: var(--transition-base);
}

body.is-nav-open {
    overflow: hidden;
}

body.is-nav-open::before {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(15, 26, 48, 0.45);
    backdrop-filter: blur(4px);
    z-index: 900;
}

.nav-toggle.is-active .nav-toggle__bar:nth-of-type(1) {
    transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-active .nav-toggle__bar:nth-of-type(2) {
    opacity: 0;
}

.nav-toggle.is-active .nav-toggle__bar:nth-of-type(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.site-nav .cta {
    padding: 0.6rem 1.4rem;
    background: var(--color-accent);
    color: #ffffff;
    border-radius: 999px;
    font-weight: 600;
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.site-nav .cta:hover,
.site-nav .cta:focus {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.nav-list {
    list-style: none;
    display: flex;
    gap: 1.2rem;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-list > li {
    position: relative;
}

.nav-list > li > a {
    font-weight: 600;
    color: var(--color-muted);
    padding: 0.6rem 0.2rem;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    transition: var(--transition-base);
}

.nav-list > li > a:hover,
.nav-list > li > a:focus,
.nav-list > li > a.is-active {
    color: var(--color-accent);
}

.has-children:hover .sub-nav,
.has-children:focus-within .sub-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.sub-nav {
    list-style: none;
    position: absolute;
    inset-inline-start: 0;
    top: 100%;
    min-width: 220px;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 0.8rem;
    margin: 0;
    display: grid;
    gap: 0.2rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: var(--transition-base);
}

.sub-nav li a {
    display: block;
    padding: 0.45rem 0.6rem;
    border-radius: var(--radius-sm);
    color: var(--color-muted);
}

.sub-nav li a:hover,
.sub-nav li a:focus {
    background: var(--color-accent-soft);
    color: var(--color-accent);
}

/* Hero */
.hero {
    display: grid;
    gap: 2rem;
    align-items: center;
    padding-block: 4rem 2rem;
}

.hero__content {
    display: grid;
    gap: 1.5rem;
}

.hero__label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-highlight);
    text-transform: uppercase;
    letter-spacing: 0.14em;
}

.hero__title {
    font-size: clamp(2.4rem, 5vw, 3.2rem);
    margin: 0;
}

.hero__description {
    font-size: 1.05rem;
    color: var(--color-muted);
    line-height: 1.7;
    max-width: 600px;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 1.6rem;
    border-radius: 999px;
    border: 1px solid transparent;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

.button--primary {
    background: var(--color-accent);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}

.button--primary:hover,
.button--primary:focus {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.button--ghost {
    background: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent-soft);
}

.button--ghost:hover,
.button--ghost:focus {
    background: var(--color-accent-soft);
}

.hero__media {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.hero__statbar {
    position: absolute;
    inset-inline: 1.5rem;
    bottom: 1.5rem;
    background: rgba(0, 91, 255, 0.86);
    color: #ffffff;
    padding: 1rem 1.2rem;
    border-radius: var(--radius-md);
    display: grid;
    gap: 0.4rem;
}

.hero__statbar span {
    font-size: 0.9rem;
    opacity: 0.85;
}

.section {
    margin-top: 4rem;
}

.section__heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.6rem;
}

.section__title {
    margin: 0;
    font-size: 1.8rem;
}

.section__subtitle {
    margin: 0;
    color: var(--color-muted);
    max-width: 480px;
}

.card-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 1.6rem;
    box-shadow: var(--shadow-sm);
    display: grid;
    gap: 1rem;
    border: 1px solid rgba(215, 221, 239, 0.7);
}

.card__title {
    margin: 0;
    font-size: 1.2rem;
}

.card__meta {
    color: var(--color-muted);
    font-size: 0.95rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--color-accent-soft);
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.price-range {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--color-text);
}

.highlight-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 0.6rem;
}

.highlight-list li {
    position: relative;
    padding-left: 1.4rem;
    color: var(--color-muted);
    line-height: 1.6;
}

.highlight-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.55rem;
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 91, 255, 0.12);
}

.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

table.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
}

.data-table thead {
    background: rgba(0, 91, 255, 0.05);
    text-align: left;
}

.data-table th,
.data-table td {
    padding: 1rem 1.1rem;
    border-bottom: 1px solid rgba(215, 221, 239, 0.7);
    font-size: 0.95rem;
}

.data-table tbody tr:hover {
    background: rgba(0, 91, 255, 0.04);
}

.facts-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.fact-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 1.4rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(215, 221, 239, 0.7);
}

.fact-card h3 {
    margin-top: 0;
}

.tip-box {
    background: linear-gradient(145deg, rgba(0, 91, 255, 0.12), rgba(0, 160, 227, 0.12));
    border: 1px solid rgba(0, 91, 255, 0.2);
    border-radius: var(--radius-md);
    padding: 1.3rem;
    display: grid;
    gap: 0.8rem;
}

.alert {
    padding: 1rem 1.2rem;
    border-radius: var(--radius-md);
    background: rgba(255, 184, 0, 0.12);
    border: 1px solid rgba(255, 184, 0, 0.4);
    color: #805700;
}

.grid-two {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.callout {
    background: var(--color-surface);
    padding: 1.6rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(215, 221, 239, 0.7);
    display: grid;
    gap: 1rem;
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.tag-cloud span {
    background: rgba(0, 91, 255, 0.08);
    color: var(--color-accent);
    padding: 0.4rem 0.8rem;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 600;
}

.featured-phones {
    display: grid;
    gap: 1.8rem;
}

.featured-phones article {
    background: var(--color-surface);
    padding: 1.6rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(215, 221, 239, 0.7);
    display: grid;
    gap: 1.2rem;
}

.featured-phones header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.8rem 1.4rem;
}

.spec-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 0.5rem;
}

.spec-list li {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px dashed rgba(215, 221, 239, 0.7);
    padding-bottom: 0.4rem;
    color: var(--color-muted);
    font-size: 0.95rem;
}

.spec-list span {
    font-weight: 600;
    color: var(--color-text);
}

/* Footer */
.site-footer {
    background: #0f1a30;
    color: rgba(255, 255, 255, 0.78);
    padding-block: 3.5rem 2rem;
    margin-top: 5rem;
}

.footer__grid {
    display: grid;
    gap: 2.5rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.footer__lead {
    margin-top: 1rem;
    max-width: 320px;
    line-height: 1.7;
}

.footer__section {
    display: grid;
    gap: 1rem;
}

.footer__title {
    margin: 0;
    font-size: 1.1rem;
    color: #ffffff;
}

.footer__links,
.footer__tags {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 0.5rem;
}

.footer__links a,
.footer__tags a {
    color: rgba(255, 255, 255, 0.78);
}

.footer__links a:hover,
.footer__tags a:hover {
    color: var(--color-highlight);
}

.footer__meta {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    margin-top: 2.5rem;
    padding-top: 1.8rem;
    font-size: 0.9rem;
    display: grid;
    gap: 0.5rem;
}

/* Media */
@media (max-width: 960px) {
    .site-nav {
        position: fixed;
        inset: 0 0 0 auto;
        width: min(360px, 86vw);
        height: 100dvh;
        display: flex;
        flex-direction: column;
        align-items: stretch;
        padding: 5.5rem 2rem 2.5rem;
        gap: 1.2rem;
        background: rgba(10, 18, 38, 0.94);
        backdrop-filter: blur(18px);
        box-shadow: -28px 0 60px rgba(5, 10, 22, 0.55);
        transform: translateX(100%);
        transition: transform 0.35s ease;
        z-index: 1000;
    }

    .site-nav.is-open {
        transform: translateX(0);
    }

    .site-nav .cta {
        align-self: stretch;
        justify-content: center;
        margin-top: 0.5rem;
    }

    .nav-list {
        flex: 1;
        overflow-y: auto;
        display: flex;
        flex-direction: column;
        gap: 0.6rem;
        margin: 0;
        padding: 0;
    }

    .nav-list > li {
        width: 100%;
        list-style: none;
    }

    .nav-list > li > a {
        display: flex;
        align-items: center;
        justify-content: space-between;
        color: rgba(255, 255, 255, 0.92);
        font-size: 1.05rem;
        padding: 0.85rem 1rem;
        border-radius: var(--radius-md);
        background: rgba(255, 255, 255, 0.06);
        box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.05);
    }

    .nav-list > li > a:focus,
    .nav-list > li > a:hover {
        background: rgba(0, 91, 255, 0.22);
        color: #ffffff;
    }

    .nav-list > li.has-children > a::after {
        content: "+";
        font-size: 1.2rem;
        line-height: 1;
        margin-left: 1rem;
        transition: transform 0.3s ease;
    }

    .nav-list > li.is-expanded > a::after {
        transform: rotate(45deg);
    }

    .sub-nav {
        display: none;
        margin-top: 0.35rem;
        padding-left: 0.8rem;
        list-style: none;
        border-left: 1px solid rgba(255, 255, 255, 0.12);
        gap: 0.25rem;
    }

    .has-children.is-expanded > .sub-nav {
        display: flex;
        flex-direction: column;
    }

    .sub-nav li a {
        display: block;
        color: rgba(255, 255, 255, 0.78);
        padding: 0.4rem 0.85rem 0.4rem 0.75rem;
        border-radius: var(--radius-sm);
    }

    .sub-nav li a:hover,
    .sub-nav li a:focus {
        background: rgba(255, 255, 255, 0.08);
        color: #ffffff;
    }

    .nav-toggle {
        display: inline-flex;
        flex-direction: column;
        justify-content: center;
    }

    .hero {
        padding-top: 3rem;
    }
}

@media (max-width: 640px) {
    main.main-content {
        padding-block: 2.5rem 3rem;
    }

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

    .card,
    .callout {
        padding: 1.3rem;
    }
}

/* Utility */
.text-muted {
    color: var(--color-muted);
}

.chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.chip {
    padding: 0.35rem 0.8rem;
    border-radius: 999px;
    background: rgba(0, 91, 255, 0.08);
    color: var(--color-accent);
    font-size: 0.8rem;
    font-weight: 600;
}

.banner {
    background: linear-gradient(120deg, rgba(0, 91, 255, 0.14), rgba(0, 160, 227, 0.14));
    border: 1px solid rgba(0, 91, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: grid;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
}

.banner h2 {
    margin: 0;
}

.media-card {
    display: grid;
    gap: 1rem;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(215, 221, 239, 0.7);
    overflow: hidden;
}

.media-card__body {
    padding: 1.5rem;
    display: grid;
    gap: 0.8rem;
}

.faq {
    display: grid;
    gap: 1rem;
}

.faq-item {
    border: 1px solid rgba(215, 221, 239, 0.8);
    border-radius: var(--radius-md);
    padding: 1.1rem 1.3rem;
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

.faq-item h3 {
    margin: 0 0 0.6rem;
    font-size: 1.1rem;
}