/* ===== Liquid Glass Design System ===== */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Glass Effects (Digital Supermaterial) ===== */
.glass-effect {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px) saturate(180%) brightness(110%);
    -webkit-backdrop-filter: blur(20px) saturate(180%) brightness(110%);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-container {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(24px) saturate(200%) brightness(120%);
    -webkit-backdrop-filter: blur(24px) saturate(200%) brightness(120%);
    border: 1.5px solid rgba(255, 255, 255, 0.15);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.glass-container-light {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px) saturate(180%) brightness(115%);
    -webkit-backdrop-filter: blur(20px) saturate(180%) brightness(115%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

/* ===== Navigation ===== */
.nav-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 24px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.nav-link:hover {
    color: white;
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.2), inset 0 0 10px rgba(255, 255, 255, 0.1);
}

/* ===== Buttons (Universal Soft Rounding) ===== */
.glass-button {
    position: relative;
    display: inline-block;
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: white;
    text-decoration: none;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.05));
    border: 1.5px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    backdrop-filter: blur(10px) saturate(150%);
    -webkit-backdrop-filter: blur(10px) saturate(150%);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.glass-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3), 
                inset 0 0 20px rgba(255, 255, 255, 0.2),
                0 0 30px rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.4);
}

.glass-button:hover::before {
    left: 100%;
}

.glass-button-large {
    padding: 1.25rem 3rem;
    font-size: 1.25rem;
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.4), rgba(236, 72, 153, 0.4));
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 24px;
    backdrop-filter: blur(15px) saturate(180%);
    -webkit-backdrop-filter: blur(15px) saturate(180%);
    color: white;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 6px 25px rgba(168, 85, 247, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.3);
    position: relative;
    overflow: hidden;
}

.glass-button-large:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 40px rgba(168, 85, 247, 0.6), 
                inset 0 0 25px rgba(255, 255, 255, 0.3),
                0 0 40px rgba(236, 72, 153, 0.5);
}

.button-primary {
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.button-primary:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3), inset 0 0 10px rgba(255, 255, 255, 0.2);
}

/* ===== Input Fields ===== */
.input-field {
    width: 100%;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1.5px solid rgba(255, 255, 255, 0.15);
    border-radius: 24px;
    color: white;
    font-size: 1rem;
    backdrop-filter: blur(10px) saturate(150%);
    -webkit-backdrop-filter: blur(10px) saturate(150%);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2);
}

.input-field::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.input-field:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1), 
                inset 0 0 15px rgba(255, 255, 255, 0.1),
                0 0 20px rgba(255, 255, 255, 0.2);
}

/* ===== Tags & Pills (rounded-full) ===== */
.ingredient-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.3), rgba(236, 72, 153, 0.3));
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 9999px;
    color: white;
    font-weight: 500;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: slideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.ingredient-tag:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(168, 85, 247, 0.4), inset 0 0 10px rgba(255, 255, 255, 0.2);
}

.remove-tag {
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.3s;
}

.remove-tag:hover {
    opacity: 1;
}

.tag-suggestion {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 9999px;
    color: white;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.tag-suggestion:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.2);
}

/* ===== Mood Cards ===== */
.mood-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1.5px solid rgba(255, 255, 255, 0.15);
    border-radius: 24px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px) saturate(150%);
    -webkit-backdrop-filter: blur(10px) saturate(150%);
}

.mood-card:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3), 
                inset 0 0 20px rgba(255, 255, 255, 0.15),
                0 0 25px rgba(255, 255, 255, 0.2);
}

.mood-card.selected {
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.4), rgba(236, 72, 153, 0.4));
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 8px 30px rgba(168, 85, 247, 0.5), 
                inset 0 0 20px rgba(255, 255, 255, 0.2),
                0 0 30px rgba(236, 72, 153, 0.4);
}

/* ===== Feature Cards ===== */
.feature-card {
    padding: 2rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1.5px solid rgba(255, 255, 255, 0.15);
    border-radius: 24px;
    backdrop-filter: blur(15px) saturate(160%);
    -webkit-backdrop-filter: blur(15px) saturate(160%);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.feature-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3), 
                inset 0 0 20px rgba(255, 255, 255, 0.1),
                0 0 30px rgba(255, 255, 255, 0.15);
}

/* ===== Recipe Result ===== */
.recipe-result {
    padding: 2.5rem;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.recipe-result h3 {
    color: white;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.recipe-result h4 {
    color: white;
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.recipe-result ul, .recipe-result ol {
    color: rgba(255, 255, 255, 0.9);
    padding-left: 1.5rem;
    line-height: 1.8;
}

.recipe-result li {
    margin-bottom: 0.5rem;
}

/* ===== Hero Glow ===== */
.hero-glow {
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.4), rgba(236, 72, 153, 0.4));
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(15px) saturate(180%);
    -webkit-backdrop-filter: blur(15px) saturate(180%);
    box-shadow: 0 8px 40px rgba(168, 85, 247, 0.6), 
                inset 0 0 30px rgba(255, 255, 255, 0.2),
                0 0 60px rgba(236, 72, 153, 0.4);
    animation: pulse 3s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ===== Animations (Fluid Physics-Based) ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 8px 40px rgba(168, 85, 247, 0.6), 
                    inset 0 0 30px rgba(255, 255, 255, 0.2),
                    0 0 60px rgba(236, 72, 153, 0.4);
    }
    50% {
        box-shadow: 0 8px 50px rgba(168, 85, 247, 0.8), 
                    inset 0 0 40px rgba(255, 255, 255, 0.3),
                    0 0 80px rgba(236, 72, 153, 0.6);
    }
}

.animate-fade-in {
    animation: fadeIn 1s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Smooth Scrolling ===== */
html {
    scroll-behavior: smooth;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .glass-container {
        padding: 2rem 1.5rem;
        border-radius: 24px;
    }

    .hero-glow {
        width: 100px;
        height: 100px;
    }

    h1 {
        font-size: 2.5rem !important;
    }

    h2 {
        font-size: 2rem !important;
    }
}

/* ===== Utility: Hidden ===== */
.hidden {
    display: none;
}