/* =========================================
   Al-Salwa Design System
   Warm Minimalist Quranic Food Encyclopedia
   Bilingual: English & Arabic with Carousel
   ========================================= */

:root {
    --color-background: #FAF9F7;
    --color-accent: #4A6C48;
    --color-accent-hover: #3E5F52;
    --color-text-primary: #1A1A1A;
    --color-text-secondary: #666666;
    --color-border: #E5E5E5;
    --color-card-bg: #FFFFFF;
    --color-wisdom-bg: #F5F4F2;

    --font-family-en: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-ar: 'Noto Sans Arabic', 'Segoe UI', Tahoma, sans-serif;
    --line-height: 1.6;
    --line-height-ar: 1.8;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-card: 0 4px 16px rgba(26, 26, 26, 0.06);
    --shadow-hover: 0 8px 24px rgba(26, 26, 26, 0.08);

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-en);
    font-size: 1rem;
    line-height: var(--line-height);
    color: var(--color-text-primary);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
}

html[dir="rtl"] body {
    font-family: var(--font-family-ar);
    line-height: var(--line-height-ar);
}

.hidden {
    display: none !important;
}

h1,
h2,
h3,
h4 {
    font-weight: 600;
    line-height: 1.3;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    color: var(--color-text-secondary);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--color-text-primary);
}

.logo-icon {
    width: 36px;
    height: 36px;
    color: var(--color-accent);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.logo-arabic {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-left: var(--spacing-xs);
    font-family: var(--font-family-ar);
}

html[dir="rtl"] .logo-arabic {
    margin-left: 0;
    margin-right: var(--spacing-xs);
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.lang-toggle:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.lang-toggle .lang-ar {
    font-family: var(--font-family-ar);
}

.lang-toggle .lang-divider {
    color: var(--color-border);
}

.lang-toggle .lang-en.active,
.lang-toggle .lang-ar.active {
    color: var(--color-accent);
    font-weight: 600;
}

/* Hero */
.hero {
    text-align: center;
    padding: var(--spacing-2xl) 0;
}

.hero h1 {
    margin-bottom: var(--spacing-md);
}

.hero p {
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Category */
.category {
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--color-border);
}

.category-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.category-title {
    font-size: 1.5rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

html[dir="rtl"] .category-title {
    letter-spacing: 0;
}

.category-subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

/* Carousel */
.carousel-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
}

.carousel-track-container {
    flex: 1;
    overflow: hidden;
}

.carousel-track {
    display: flex;
    gap: var(--spacing-xl);
    transition: transform 0.4s ease;
}

.carousel-btn {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-normal);
    z-index: 10;
}

.carousel-btn:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
}

.carousel-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.carousel-btn:disabled:hover {
    background: var(--color-card-bg);
    border-color: var(--color-border);
    color: inherit;
}

.carousel-btn svg {
    width: 24px;
    height: 24px;
}

html[dir="rtl"] .carousel-prev svg {
    transform: rotate(180deg);
}

html[dir="rtl"] .carousel-next svg {
    transform: rotate(180deg);
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-border);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-dot.active {
    background: var(--color-accent);
    width: 24px;
    border-radius: 4px;
}

/* Flip Card */
.flip-card {
    flex: 0 0 calc(50% - var(--spacing-xl) / 2);
    min-width: 320px;
    max-width: 400px;
    height: 460px;
    perspective: 1000px;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
}

.flip-card.flipped .flip-card-inner {
    transform: rotateY(180deg);
}

html[dir="rtl"] .flip-card.flipped .flip-card-inner {
    transform: rotateY(-180deg);
}

.flip-card-front,
.flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: var(--radius-lg);
    background: var(--color-card-bg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}

.flip-card-back {
    transform: rotateY(180deg);
    padding: var(--spacing-lg);
    overflow-y: auto;
}

html[dir="rtl"] .flip-card-back {
    transform: rotateY(-180deg);
}

.card-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.card-content {
    padding: var(--spacing-lg);
    text-align: center;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.card-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.reveal-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.reveal-btn:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.reveal-btn svg {
    width: 18px;
    height: 18px;
}

html[dir="rtl"] .reveal-btn {
    flex-direction: row-reverse;
}

.back-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.back-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.close-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.close-btn:hover {
    background: var(--color-border);
}

.close-btn svg {
    width: 16px;
    height: 16px;
    color: var(--color-text-secondary);
}

.recipe-section {
    margin-bottom: var(--spacing-md);
}

.section-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

html[dir="rtl"] .section-label {
    letter-spacing: 0;
}

.recipe-steps {
    list-style: none;
    counter-reset: step;
}

.recipe-steps li {
    counter-increment: step;
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

html[dir="rtl"] .recipe-steps li {
    padding-left: 0;
    padding-right: var(--spacing-lg);
}

.recipe-steps li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
}

html[dir="rtl"] .recipe-steps li::before {
    left: auto;
    right: 0;
}

.wisdom-box {
    background: var(--color-wisdom-bg);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border-left: 3px solid var(--color-accent);
}

html[dir="rtl"] .wisdom-box {
    border-left: none;
    border-right: 3px solid var(--color-accent);
}

.wisdom-box .section-label {
    margin-bottom: var(--spacing-xs);
}

.wisdom-text {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-style: italic;
}

html[dir="rtl"] .wisdom-text {
    font-style: normal;
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-xl);
}

.footer-logo {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.footer-text {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

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

.footer-link:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 900px) {
    .flip-card {
        flex: 0 0 100%;
        max-width: 100%;
    }

    .carousel-btn {
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 600px) {
    h1 {
        font-size: 1.75rem;
    }

    .hero {
        padding: var(--spacing-xl) 0;
    }

    .category {
        padding: var(--spacing-xl) 0;
    }

    .carousel-btn {
        width: 36px;
        height: 36px;
    }

    .carousel-btn svg {
        width: 20px;
        height: 20px;
    }

    .flip-card {
        height: 420px;
        min-width: 280px;
    }

    .card-image {
        height: 180px;
    }
}

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

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}