/* 
   QSBS Chemicals - Modern & Premium Style
*/

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

:root {
    /* Colors */
    --color-primary: #0077b6;
    --color-primary-dark: #023e8a;
    --color-secondary: #48cae4;
    --color-accent: #caf0f8;
    --color-text: #2b2d42;
    --color-text-light: #6c757d;
    --color-background: #ffffff;
    --color-background-alt: #f8f9fa;
    --color-white: #ffffff;
    --color-success: #2a9d8f;

    /* Typography */
    --font-family-base: 'Cairo', system-ui, -apple-system, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Effects */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --border-radius-lg: 16px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family-base);
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: var(--line-height-base);
    -webkit-font-smoothing: antialiased;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section {
    padding: var(--spacing-lg) 0;
}

.grid {
    display: grid;
    gap: var(--spacing-md);
}

/* Typography Utilities */
.text-gradient {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-inline: auto;
    /* RTL-friendly margin */
}

.section__title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary-dark);
}

.section__subtitle {
    font-size: 1.25rem;
    color: var(--color-text-light);
}

/* Header & Nav */
.header {
    padding: var(--spacing-sm) 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

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

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-img {
    height: 40px;
    width: auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.5px;
}

.nav__list {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav__link {
    font-weight: 600;
    color: var(--color-text);
}

.nav__link:hover {
    color: var(--color-primary);
}

.nav__link--btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--color-primary);
    color: var(--color-white) !important;
    border-radius: var(--border-radius);
}

.nav__link--btn:hover {
    background-color: var(--color-primary-dark);
}

.lang-toggle {
    background: none;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    margin-inline-start: var(--spacing-sm);
}

.lang-toggle:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.nav__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 4px;
}

.nav__toggle-bar {
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    background: linear-gradient(to bottom, var(--color-accent) 0%, var(--color-white) 100%);
    overflow: hidden;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero__title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

.hero__desc {
    font-size: 1.25rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    max-width: 500px;
}

.hero__actions {
    display: flex;
    gap: var(--spacing-sm);
}

.hero__image-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero__image-placeholder {
    position: relative;
    width: 100%;
    max-width: 500px;
    aspect-ratio: 1;
}

.hero__image-placeholder svg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(1.5);
    z-index: 1;
}

/* Flip blob for RTL/LTR variety if needed, but centering works fine */

.hero__img {
    position: relative;
    z-index: 2;
    mask-image: url('data:image/svg+xml;utf8,<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"><path d="M47.1,-57.1C59.9,-47.4,68.5,-31.2,71.7,-14.3C74.9,2.6,72.7,20.2,64.3,35.5C55.9,50.8,41.2,63.9,25,69.5C8.8,75.1,-9,73.3,-25.1,66.3C-41.2,59.3,-55.6,47.1,-63.9,31.7C-72.2,16.3,-74.3,-2.3,-68.8,-18.2C-63.3,-34.1,-50.2,-47.3,-36.4,-56.4C-22.6,-65.5,-8.1,-70.5,2.9,-73.9C13.9,-77.4,27.8,-79.3,47.1,-57.1Z" transform="translate(100 100)" /></svg>');
    mask-size: contain;
    mask-repeat: no-repeat;
    mask-position: center;
    -webkit-mask-image: url('data:image/svg+xml;utf8,<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"><path d="M47.1,-57.1C59.9,-47.4,68.5,-31.2,71.7,-14.3C74.9,2.6,72.7,20.2,64.3,35.5C55.9,50.8,41.2,63.9,25,69.5C8.8,75.1,-9,73.3,-25.1,66.3C-41.2,59.3,-55.6,47.1,-63.9,31.7C-72.2,16.3,-74.3,-2.3,-68.8,-18.2C-63.3,-34.1,-50.2,-47.3,-36.4,-56.4C-22.6,-65.5,-8.1,-70.5,2.9,-73.9C13.9,-77.4,27.8,-79.3,47.1,-57.1Z" transform="translate(100 100)" /></svg>');
    -webkit-mask-size: contain;
    -webkit-mask-repeat: no-repeat;
    -webkit-mask-position: center;
    width: 100%;
    height: 100%;
    object-fit: contain;
}


/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

.btn--primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn--primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn--outline {
    background-color: transparent;
    color: var(--color-primary);
    border-color: currentcolor;
}

.btn--outline:hover {
    background-color: rgba(0, 119, 182, 0.1);
}

.btn--sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn--block {
    display: block;
    width: 100%;
}

/* Cards */
.card {
    background-color: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-md);
    transition: var(--transition);
    border: 1px solid var(--color-background-alt);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* Features Section */
.features__grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.feature-card {
    text-align: center;
}

.feature-card__icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
    padding: 1rem;
    background-color: var(--color-accent);
    border-radius: 50%;
}

.feature-card__title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.feature-card__desc {
    color: var(--color-text-light);
}

/* Products Section */
.products {
    background-color: var(--color-background-alt);
}

.products__grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.product-card {
    padding: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.product-card__image {
    height: 250px;
    width: 100%;
    overflow: hidden;
}

.product-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-card__image img {
    transform: scale(1.05);
}

.product-card__content {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.product-card__title {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.product-card__desc {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
    flex-grow: 1;
}

/* About Section */
.about {
    text-align: center;
}

.about__content {
    max-width: 800px;
    margin: 0 auto;
}

.about__content p {
    font-size: 1.125rem;
    color: var(--color-text-light);
}

/* Contact Section */
.contact__wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    background-color: var(--color-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    color: var(--color-white);
}

.contact__info .section__title {
    color: var(--color-white);
    text-align: inherit;
    /* Inherit parent text alignment which will follow dir */
}

.contact__info p {
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.contact__list {
    margin-top: var(--spacing-md);
}

.contact__list li {
    margin-bottom: var(--spacing-sm);
}

.contact__form {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    color: var(--color-text);
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 119, 182, 0.1);
}

/* Footer */
.footer {
    background-color: #212529;
    /* Dark gray */
    color: #f8f9fa;
    padding: var(--spacing-md) 0;
    margin-top: var(--spacing-xl);
}

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

.footer__links {
    display: flex;
    gap: var(--spacing-md);
}

.footer__links a:hover {
    color: var(--color-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .nav__list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        width: 100%;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        text-align: center;
    }

    .nav__list.active {
        display: flex;
    }

    .nav__toggle {
        display: flex;
    }

    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero__actions {
        justify-content: center;
    }

    .hero__title {
        font-size: 2.5rem;
    }

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

    .footer__container {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}