:root {
    --accent: #10b981;
    --accent-dark: #059669;
    --accent-soft: rgba(16, 185, 129, 0.14);
    --accent-glow: rgba(52, 211, 153, 0.22);
    --bg-body: #f2f8f5;
    --bg-surface: #ffffff;
    --bg-nav: #083525;
    --text-main: #16291f;
    --text-muted: #5c7268;
    --border: #def0e7;
    --shadow: 0 6px 18px rgba(14, 65, 44, 0.08);
    --shadow-hover: 0 14px 30px rgba(14, 65, 44, 0.16);
}

[data-theme="dark"] {
    --accent: #34d399;
    --accent-dark: #10b981;
    --accent-soft: rgba(52, 211, 153, 0.18);
    --accent-glow: rgba(52, 211, 153, 0.28);
    --bg-body: #081310;
    --bg-surface: #10201a;
    --bg-nav: #05130e;
    --text-main: #dff7ec;
    --text-muted: #8fb3a3;
    --border: #22443a;
    --shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
    --shadow-hover: 0 14px 30px rgba(0, 0, 0, 0.55);
}

body {
    background: var(--bg-body);
    color: var(--text-main);
    font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.site-navbar {
    background: var(--bg-nav);
    box-shadow: var(--shadow);
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: var(--accent);
    color: #ffffff;
    font-weight: 700;
    margin-right: 8px;
}

.site-navbar .nav-link {
    color: #cfe0f3;
    padding: 0.6rem 1rem;
    border-radius: 8px;
}

.site-navbar .nav-link.active {
    color: #ffffff;
    background: var(--accent);
}

.site-navbar .nav-link:hover:not(.active) {
    background: rgba(255, 255, 255, 0.1);
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #cfe0f3;
    background: transparent;
    margin-left: 0.5rem;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    transform: rotate(20deg);
    transition: transform 0.3s ease;
}

.theme-toggle.is-dark .icon-sun {
    display: block;
}

.theme-toggle.is-dark .icon-moon {
    display: none;
}

.theme-toggle .icon-sun {
    display: none;
}

.page-main {
    flex: 1 0 auto;
    padding-top: 2.5rem;
    padding-bottom: 3rem;
}

.page-head {
    margin-bottom: 1.8rem;
}

.page-head h1 {
    font-weight: 700;
}

.hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #083525 0%, var(--accent) 130%);
    border-radius: 18px;
    padding: 3.4rem 2rem;
    color: #ffffff;
    box-shadow: var(--shadow);
    margin-bottom: 2.5rem;
    text-align: center;
}

.hero::before {
    content: "";
    position: absolute;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-glow), transparent 70%);
    top: -150px;
    right: -120px;
    pointer-events: none;
    animation: heroGlow 5s ease-in-out infinite;
}

@keyframes heroGlow {
    0%, 100% { opacity: 0.7; }
    50%      { opacity: 1; }
}

.hero__content {
    position: relative;
}

.hero__title {
    font-size: 2.6rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
}

.hero__text {
    max-width: 620px;
    margin: 0 auto 1.6rem;
    font-size: 1.15rem;
    opacity: 0.92;
}

.btn-accent {
    background: linear-gradient(135deg, #16a34a 0%, #059669 100%);
    border: 1px solid transparent;
    color: #ffffff;
    font-weight: 600;
    padding: 0.6rem 1.6rem;
    transition: all 0.2s ease;
}

.btn-accent:hover {
    background: linear-gradient(135deg, #15803d 0%, #047857 100%);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.feature-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.8rem 1.4rem;
    height: 100%;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.25s ease;
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
}

.feature-card__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    background: var(--accent-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.7rem;
}

.feature-card__title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.product-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
    transition: all 0.25s ease;
}

.product-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
}

.product-card__image {
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.2rem;
}

.product-card__image--laptop {
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
}

.product-card__image--phone {
    background: linear-gradient(135deg, #ccfbf1, #99f6e4);
}

.product-card__image--tv {
    background: linear-gradient(135deg, #ecfccb, #d9f99d);
}

.product-card__image--headphones {
    background: linear-gradient(135deg, #dcfce7, #bbf7d0);
}

.product-card__body {
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
}

.product-card__category {
    color: var(--accent);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.3rem;
}

.product-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
}

.product-card__desc {
    color: var(--text-muted);
    font-size: 0.92rem;
    flex: 1 1 auto;
    margin-bottom: 0.9rem;
}

.product-card__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.product-card__price {
    color: var(--accent);
    font-weight: 700;
    font-size: 1.15rem;
}

.product-card__badge {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 0.2rem 0.5rem;
    border-radius: 20px;
}

.info-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.6rem;
    box-shadow: var(--shadow);
    height: 100%;
    transition: all 0.25s ease;
}

.info-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
}

.info-card__title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.info-card__subtitle {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.4rem;
}

.contact-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.contact-list__item {
    display: flex;
    align-items: center;
    padding: 0.45rem 0;
}

.contact-list__icon {
    margin-right: 0.7rem;
    font-size: 1.1rem;
}

.contact-list__item a {
    color: var(--accent);
    text-decoration: none;
}

.contact-list__item a:hover {
    text-decoration: underline;
}

.contact-form .form-label {
    font-weight: 600;
}

.contact-form .form-control {
    background: var(--bg-body);
    border-color: var(--border);
    color: var(--text-main);
}

.contact-form .form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 0.2rem var(--accent-soft);
}

.contact-form .form-control::placeholder {
    color: var(--text-muted);
}

.roles-section {
    margin-top: 2rem;
}

.roles-section__title {
    font-weight: 700;
    margin-bottom: 1.4rem;
}

.role-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.6rem;
    height: 100%;
    box-shadow: var(--shadow);
    transition: all 0.25s ease;
}

.role-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
}

.role-card__number {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--accent);
    color: #ffffff;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.8rem;
}

.role-card__title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.role-card__text {
    color: var(--text-muted);
    margin-bottom: 0;
}

.error-page {
    text-align: center;
    padding: 4rem 1rem;
}

.error-page__code {
    font-size: 5.5rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 0.8rem;
}

.error-page__title {
    font-weight: 700;
    margin-bottom: 0.6rem;
}

.error-page__text {
    color: var(--text-muted);
    max-width: 480px;
    margin: 0 auto 1.5rem;
}

.error-page__request {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.site-footer {
    background: var(--bg-nav);
    color: #aebfd4;
    padding: 1.2rem 0;
    flex-shrink: 0;
    margin-top: 2rem;
}

.site-footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.site-footer__project {
    font-weight: 600;
}

.site-footer__author {
    font-size: 0.92rem;
}

@media (max-width: 575px) {
    .hero {
        padding: 2.2rem 1.2rem;
        margin-bottom: 1.8rem;
    }

    .hero__title {
        font-size: 1.9rem;
    }

    .hero__text {
        font-size: 1rem;
    }

    .error-page__code {
        font-size: 4rem;
    }

    .site-footer .container {
        justify-content: center;
        text-align: center;
    }
}