:root {
    --primary: #1a1a1f;
    --primary-light: #252530;
    --primary-dark: #13131a;
    --accent: #b8860b;
    --accent-light: #d4af37;
    --accent-dark: #9c7412;
    --background: #1c1c24;
    --text: #e6e6e6;
    --text-light: #b0b0b0;
    --text-muted: #888890;
    --border: #2d2d38;
    --card-background: #212128;
    --sidebar-width: 360px;
    --sidebar-collapsed: 80px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.15);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.2);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.25);
    --card-radius: 12px;
    --transition: all 0.35s cubic-bezier(0.3, 0, 0.2, 1);
    --font-serif: 'Playfair Display', Georgia, serif;
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInLeft {
    from { transform: translateX(-100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOutLeft {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(-100%); opacity: 0; }
}

@keyframes subtleGlow {
    0%, 100% { box-shadow: 0 0 5px rgba(184, 134, 11, 0.2); }
    50% { box-shadow: 0 0 8px rgba(184, 134, 11, 0.3); }
}

@keyframes softHighlight {
    0%, 100% { background-color: rgba(184, 134, 11, 0.08); }
    50% { background-color: rgba(184, 134, 11, 0.12); }
}

body {
    font-family: 'Inter', 'Helvetica Neue', sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    display: flex;
    min-height: 100vh;
    margin: 0;
    letter-spacing: 0.01em;
}

.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(to bottom, var(--primary-dark), var(--primary) 70%);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    transform: translateX(-100%);
    transition: var(--transition);
    color: white;
    z-index: 100;
    box-shadow: var(--shadow-md);
    border-right: 1px solid rgba(255,255,255,0.03);
    display: flex;
    flex-direction: column;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar.collapsed .sidebar-title span,
.sidebar.collapsed .search-container,
.sidebar.collapsed .recipe-content {
    display: none;
}

.sidebar.collapsed .recipe-item {
    justify-content: center;
    padding: 15px;
}

.sidebar.collapsed .recipe-item::after {
    content: attr(data-title);
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-light);
    padding: 10px 15px;
    border-radius: var(--card-radius);
    font-size: 0.9rem;
    white-space: nowrap;
    opacity: 0;
    transition: var(--transition);
    margin-left: 10px;
    pointer-events: none;
    box-shadow: var(--shadow-md);
    z-index: 101;
    border: 1px solid var(--border);
}

.sidebar.collapsed .recipe-item:hover::after {
    opacity: 1;
    transform: translateY(-50%) translateX(5px);
}

.sidebar.mobile-visible {
    transform: translateX(0);
    animation: slideInLeft 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar.mobile-hiding {
    animation: slideOutLeft 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-header {
    height: 90px;
    display: flex;
    align-items: center;
    padding: 0 30px;
    background: rgba(0, 0, 0, 0.12);
    position: relative;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    flex-shrink: 0;
}

.sidebar-title {
    display: flex;
    align-items: center;
    gap: 15px;
}

.sidebar-title i {
    font-size: 26px;
    color: var(--accent-light);
}

.sidebar-title span {
    font-family: var(--font-serif);
    font-size: 21px;
    font-weight: 500;
    white-space: nowrap;
    letter-spacing: 0.5px;
}

.toggle-sidebar {
    display: none;
}

.toggle-sidebar:hover {
    background: var(--accent-dark);
    transform: scale(1.05);
}

.toggle-sidebar:active {
    transform: scale(0.97);
}

.toggle-sidebar i {
    font-size: 22px;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.search-container {
    position: relative;
    margin: 24px 30px;
    padding: 0;
    flex-shrink: 0;
}

#searchBar {
    width: 100%;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    padding: 14px 20px 14px 45px;
    border-radius: 8px;
    color: white;
    font-size: 0.95rem;
    transition: var(--transition);
    backdrop-filter: blur(5px);
}

.search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-light);
    font-size: 18px;
    pointer-events: none;
    opacity: 0.8;
}

#searchBar:focus {
    outline: none;
    background: rgba(255,255,255,0.06);
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(184, 134, 11, 0.2);
}

#searchBar::placeholder {
    color: rgba(255,255,255,0.35);
    font-style: italic;
}

#recipeList {
    display: flex;
    flex-direction: column;
    gap: 15px;
    overflow-y: auto;
    height: calc(100vh - 290px);
    padding: 10px 25px 25px 25px;
}

#recipeList::-webkit-scrollbar {
    width: 4px;
}

#recipeList::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.02);
    border-radius: 10px;
    margin: 5px;
}

#recipeList::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 10px;
}

#recipeList::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,0.15);
}

.recipe-item {
    background: rgba(255,255,255,0.03);
    padding: 16px 20px;
    border-radius: var(--card-radius);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    min-height: 80px;
}

.recipe-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 0;
    background: var(--accent);
    transition: height 0.4s ease;
}

.recipe-item:hover {
    background: rgba(255,255,255,0.05);
    border-color: rgba(255,255,255,0.07);
    transform: translateX(3px);
}

.recipe-item:hover::before {
    height: 100%;
}

.recipe-item.active {
    background: rgba(184, 134, 11, 0.08);
    border-color: rgba(184, 134, 11, 0.3);
    animation: softHighlight 3s infinite;
}

.recipe-item.active::before {
    height: 100%;
}

.recipe-content {
    overflow: hidden;
    flex: 1;
    padding-right: 8px;
}

.recipe-content h3 {
    color: white;
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 8px;
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
}

.recipe-meta {
    display: flex;
    gap: 12px;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.5);
}

.recipe-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.recipe-meta i {
    font-size: 13px;
    opacity: 0.9;
    color: var(--accent-light);
}

.main-content {
    margin-left: 0;
    flex: 1;
    padding: 85px 50px 50px 50px;
    transition: var(--transition);
    background: var(--background);
}

.main-content.expanded {
    margin-left: var(--sidebar-collapsed);
}

#recipeDisplay {
    max-width: 800px;
    margin: 0 auto;
    background: var(--card-background);
    border-radius: var(--card-radius);
    padding: 50px;
    box-shadow: var(--shadow-lg);
    animation: fadeIn 0.5s ease-out;
    border: 1px solid var(--border);
}

.recipe-header {
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
}

.recipe-header h2 {
    font-family: var(--font-serif);
    font-size: 2.6rem;
    color: var(--text);
    font-weight: 500;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    letter-spacing: 0.5px;
    position: relative;
    display: inline-block;
}

.recipe-header h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--accent);
    margin: 15px auto 0;
}

.recipe-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    background: rgba(0, 0, 0, 0.15);
    padding: 1.5rem;
    border-radius: var (--card-radius);
    margin-top: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
}

.stat-item i {
    font-size: 1.4rem;
    color: var(--accent);
}

.ingredients-section, .instructions-section {
    margin-top: 4rem;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    color: var(--text);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    letter-spacing: 0.5px;
    position: relative;
}

.section-title::before {
    content: '';
    width: 30px;
    height: 2px;
    background: var(--accent);
}

.ingredient-category {
    background: rgba(0, 0, 0, 0.15);
    border-radius: var(--card-radius);
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}

.ingredient-category h4 {
    font-family: var(--font-serif);
    color: var(--accent-light);
    font-size: 1.2rem;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(184, 134, 11, 0.2);
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: 0.3px;
    font-weight: 500;
}

.ingredient-category h4::before {
    content: '';
    width: 4px;
    height: 16px;
    background: var(--accent);
    border-radius: 2px;
}

.ingredients-list {
    list-style: none;
}

.ingredients-list li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    transition: transform 0.3s ease, color 0.3s ease;
    display: flex;
    align-items: center;
    line-height: 1.5;
}

.ingredients-list li::before {
    content: '•';
    color: var(--accent);
    margin-right: 12px;
    font-size: 1.2em;
    opacity: 0.8;
}

.ingredients-list li:hover {
    transform: translateX(6px);
    color: var(--accent-light);
}

.ingredients-list li:last-child {
    border-bottom: none;
}

.instruction-category {
    margin-bottom: 2.5rem;
}

.instruction-category h4 {
    font-family: var(--font-serif);
    color: var(--accent-light);
    font-size: 1.2rem;
    margin-bottom: 1.2rem;
    letter-spacing: 0.3px;
    font-weight: 500;
}

.instructions {
    background: rgba(0, 0, 0, 0.15);
    border-radius: var(--card-radius);
    padding: 5px;
    margin-top: 16px;
    border: 1px solid var(--border);
}

.instruction-step {
    display: flex;
    gap: 16px;
    padding: 18px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    align-items: flex-start;
    transition: background-color 0.3s ease;
}

.instruction-step:hover {
    background-color: rgba(184, 134, 11, 0.05);
}

.instruction-step:last-child {
    border-bottom: none;
}

.step-number {
    background: var(--accent);
    color: white;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 600;
    flex-shrink: 0;
}

.instruction-step p {
    flex: 1;
    line-height: 1.7;
    margin: 0;
    padding-top: 2px;
}

.empty-state {
    text-align: center;
    padding: 70px 30px;
    color: var(--text-light);
}

.empty-state i {
    font-size: 3.5rem;
    color: var(--accent-light);
    margin-bottom: 25px;
    opacity: 0.7;
}

.empty-state h3 {
    font-family: var(--font-serif);
    color: var(--text);
    font-size: 1.8rem;
    margin-bottom: 15px;
    font-weight: 500;
    letter-spacing: 0.3px;
}

.empty-state p {
    color: var(--text-light);
    max-width: 350px;
    margin: 0 auto;
    line-height: 1.7;
    font-style: italic;
}

.empty-search {
    padding: 30px 20px;
    text-align: center;
    color: rgba(255,255,255,0.7);
}

.empty-search i {
    font-size: 2rem;
    margin-bottom: 15px;
    color: var(--accent-light);
    opacity: 0.8;
}

.home-button-container {
    padding: 0 25px;
    margin: 15px 0;
    flex-shrink: 0;
}

.home-button {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 14px 18px;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    gap: 12px;
    justify-content: center;
}

.home-button i {
    font-size: 1.2rem;
}

.home-button:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.home-button:active {
    transform: translateY(0);
}

.sidebar.collapsed .home-button span {
    display: none;
}

.sidebar.collapsed .home-button {
    padding: 14px;
}

.sidebar.collapsed .home-button i {
    font-size: 1.4rem;
}

.home-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: 60px 30px;
    background: var(--card-background);
    border-radius: var(--card-radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    animation: fadeIn 0.8s ease-out;
}

.home-state .logo {
    width: 120px;
    height: 120px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 40px;
    box-shadow: 0 10px 25px rgba(184, 134, 11, 0.25);
    animation: subtleGlow 3s infinite;
}

.home-state .logo i {
    font-size: 50px;
    color: white;
}

.home-state h1 {
    font-family: var(--font-serif);
    font-size: 2.8rem;
    color: var(--text);
    font-weight: 500;
    margin-bottom: 30px;
    letter-spacing: 0.5px;
    line-height: 1.2;
    position: relative;
}

.home-state h1::after {
    content: '';
    display: block;
    width: 80px;
    height: 3px;
    background: var(--accent);
    margin: 20px auto 0;
}

.home-description {
    color: var(--text-light);
    max-width: 450px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.6;
    font-family: var(--font-serif);
    font-style: italic;
    letter-spacing: 0.3px;
}

.mobile-menu-button {
    display: block;
    position: fixed;
    left: 20px;
    top: 20px;
    z-index: 101;
    background: var(--accent);
    border: none;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    color: white;
    font-size: 1.4rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-menu-button:hover, .mobile-menu-button:focus {
    background: var(--accent-dark);
    transform: scale(1.05);
}

.mobile-menu-button:active {
    transform: scale(0.95);
}

.mobile-menu-button.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
}

.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 99;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.mobile-overlay.visible {
    display: block;
    opacity: 1;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 85vw;
        max-width: 350px;
        z-index: 1000;
    }

    .sidebar.collapsed {
        transform: translateX(-100%);
    }

    .toggle-sidebar {
        opacity: 0;
        pointer-events: none;
    }

    .main-content {
        margin-left: 0;
        padding: 85px 20px 30px 20px;
    }

    .main-content.expanded {
        margin-left: 0;
    }

    #recipeDisplay {
        padding: 35px 25px;
    }

    .recipe-header h2 {
        font-size: 2rem;
    }
    
    .sidebar.collapsed .recipe-content {
        display: block;
    }
    
    .sidebar.collapsed .recipe-item {
        padding: 16px 20px;
        justify-content: flex-start;
    }
    
    .sidebar.mobile-visible .recipe-content,
    .sidebar.mobile-visible .search-container {
        display: block;
    }
    
    .sidebar.mobile-visible .recipe-item {
        padding: 16px 20px;
        justify-content: flex-start;
    }

    .section-title {
        font-size: 1.4rem;
    }

    .instruction-step {
        padding: 16px;
    }

    .ingredient-category h4 {
        font-size: 1.1rem;
    }
    
    .sidebar.collapsed .home-button span {
        display: inline;
    }
    
    .sidebar.collapsed .home-button {
        padding: 14px 18px;
    }
    
    .home-state h1 {
        font-size: 2.2rem;
    }
    
    .home-state .logo {
        width: 100px;
        height: 100px;
    }
    
    .home-description {
        font-size: 1rem;
        max-width: 320px;
    }
    
    #recipeList {
        height: calc(100vh - 300px);
        padding-top: 15px;
    }
}

@media (min-width: 769px) {
    .mobile-menu-button {
        width: 52px;
        height: 52px;
        font-size: 1.5rem;
    }
    
    .main-content {
        padding-left: 60px;
        padding-top: 60px;
    }
    
    .sidebar.collapsed .recipe-content {
        display: none;
    }
    
    .sidebar.collapsed .recipe-item {
        padding: 15px;
        justify-content: center;
    }

    .sidebar.collapsed .recipe-item i {
        font-size: 1.5rem;
    }
}

.recipe-header, .section-title, .ingredient-category, .instruction-step {
    animation: fadeIn 0.7s ease-out forwards;
    animation-delay: calc(var(--animation-order) * 0.1s);
    opacity: 0;
}

.recipe-header { --animation-order: 1; }
.section-title { --animation-order: 2; }
.ingredient-category { --animation-order: 3; }
.instruction-step { --animation-order: 4; }