/* CSS Design System for Bio-Hacker's Supplement Engine */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
    --bg-primary: #07080a;
    --bg-secondary: #0f1117;
    --bg-card: #151821;
    --accent-cyan: #00e5ff;
    --accent-green: #00ff66;
    --accent-purple: #9d4edd;
    --accent-orange: #ff9e00;
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #4b5563;
    
    --border-color: rgba(255, 255, 255, 0.06);
    --border-glow: rgba(0, 229, 255, 0.15);
    
    --shadow-cyan: 0 0 15px rgba(0, 229, 255, 0.25);
    --shadow-green: 0 0 15px rgba(0, 255, 102, 0.25);
    --shadow-purple: 0 0 15px rgba(157, 78, 221, 0.25);
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --transition-speed: 0.3s;
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(157, 78, 221, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(0, 229, 255, 0.05) 0%, transparent 40%);
    background-attachment: fixed;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--bg-card);
    border-radius: 4px;
    border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-cyan);
}

/* Layout Elements */
header {
    background: rgba(7, 8, 10, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 2rem;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo span {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-secondary);
    border-left: 1px solid var(--text-muted);
    padding-left: 0.5rem;
    letter-spacing: 2px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.btn-icon {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.1rem;
    padding: 0.6rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.btn-icon:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    box-shadow: var(--shadow-cyan);
}

.stack-indicator {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.stack-indicator:hover {
    border-color: var(--accent-green);
    box-shadow: var(--shadow-green);
}

.stack-count {
    background: var(--accent-green);
    color: var(--bg-primary);
    font-weight: 700;
    font-size: 0.8rem;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

/* Hero Section */
.hero {
    max-width: 800px;
    margin: 4rem auto 2rem;
    text-align: center;
    padding: 0 1.5rem;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.hero h1 span {
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}

/* Search and Filters */
.search-container {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-bar {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 1.1rem 1.5rem 1.1rem 3rem;
    border-radius: 50px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1.05rem;
    transition: all var(--transition-speed);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.search-bar:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: var(--shadow-cyan), 0 10px 30px rgba(0,0,0,0.3);
}

.search-icon {
    position: absolute;
    left: 1.2rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.2rem;
    pointer-events: none;
}

.search-suggestions {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    z-index: 10;
    max-height: 250px;
    overflow-y: auto;
    display: none;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

.suggestion-item {
    padding: 0.8rem 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.02);
}

.suggestion-item:hover {
    background: rgba(0, 229, 255, 0.05);
    color: var(--accent-cyan);
}

.suggestion-type {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0.2rem 0.5rem;
    background: rgba(255,255,255,0.05);
    border-radius: 4px;
    color: var(--text-secondary);
}

/* Category Filters */
.filters-section {
    max-width: 900px;
    margin: 2rem auto;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.8rem;
    padding: 0 1rem;
}

.filter-pill {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--transition-speed);
}

.filter-pill:hover {
    border-color: var(--accent-cyan);
    color: var(--text-primary);
}

.filter-pill.active {
    background: rgba(0, 229, 255, 0.1);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    box-shadow: 0 0 10px rgba(0, 229, 255, 0.15);
}

/* App Main Grid */
main {
    max-width: 1200px;
    margin: 2rem auto 6rem;
    padding: 0 1.5rem;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

/* Supplement Card Design */
.supp-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.2s, border-color var(--transition-speed), box-shadow var(--transition-speed);
    position: relative;
    overflow: hidden;
}

/* Card Image Banner */
.card-banner {
    width: calc(100% + 3rem);
    margin: -1.5rem -1.5rem 1.2rem -1.5rem;
    height: 160px;
    overflow: hidden;
    position: relative;
    background: rgba(0,0,0,0.3);
}

.card-banner-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease, opacity 0.3s ease;
}

.supp-card:hover .card-banner-img {
    transform: scale(1.06);
}

.supp-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-cyan);
    box-shadow: 0 10px 25px rgba(0, 229, 255, 0.05), var(--border-glow);
}

.supp-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent-cyan);
    opacity: 0;
    transition: opacity var(--transition-speed);
    z-index: 2;
}

.supp-card:hover::before {
    opacity: 1;
}

/* Card Header */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.8rem;
}

.card-title-group h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
}

.chemical-name {
    font-size: 0.8rem;
    font-style: italic;
    color: var(--text-secondary);
}

.score-badge {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 0.9rem;
    padding: 0.3rem 0.7rem;
    border-radius: 6px;
    text-transform: uppercase;
}

.score-a {
    background: rgba(0, 255, 102, 0.1);
    color: var(--accent-green);
    border: 1px solid rgba(0, 255, 102, 0.2);
    box-shadow: 0 0 8px rgba(0, 255, 102, 0.1);
}

.score-b {
    background: rgba(0, 229, 255, 0.1);
    color: var(--accent-cyan);
    border: 1px solid rgba(0, 229, 255, 0.2);
}

.score-c {
    background: rgba(255, 158, 0, 0.1);
    color: var(--accent-orange);
    border: 1px solid rgba(255, 158, 0, 0.2);
}

/* Card Body */
.card-body {
    flex-grow: 1;
    margin-bottom: 1.5rem;
}

.supp-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.goal-tag {
    font-size: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    color: var(--text-secondary);
}

.dosage-info {
    font-size: 0.85rem;
    color: var(--text-primary);
    background: rgba(255,255,255,0.02);
    padding: 0.5rem 0.8rem;
    border-radius: 8px;
    border-left: 3px solid var(--accent-purple);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Card Actions */
.card-actions {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), #00b4d8);
    color: #000;
    border: none;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    font-family: var(--font-heading);
    transition: all var(--transition-speed);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary:hover {
    box-shadow: var(--shadow-cyan);
    transform: scale(1.02);
}

.buy-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.btn-affiliate {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.6rem 0.5rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    transition: all var(--transition-speed);
}

.btn-affiliate.amazon:hover {
    border-color: var(--accent-orange);
    color: var(--accent-orange);
}

.btn-affiliate.iherb:hover {
    border-color: var(--accent-green);
    color: var(--accent-green);
}

/* Stack Drawer */
.stack-drawer {
    position: fixed;
    top: 0;
    right: -400px;
    width: 380px;
    height: 100%;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    box-shadow: -10px 0 40px rgba(0,0,0,0.6);
    z-index: 101;
    transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
}

.stack-drawer.open {
    right: 0;
}

.drawer-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.drawer-header h2 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent-green);
}

.drawer-body {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.stack-empty {
    color: var(--text-muted);
    text-align: center;
    margin: auto 0;
    font-size: 0.95rem;
}

.stack-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stack-item-info h4 {
    font-weight: 600;
    font-size: 0.95rem;
}

.stack-item-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.btn-remove {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.1rem;
    transition: color var(--transition-speed);
}

.btn-remove:hover {
    color: #ef4444;
}

.drawer-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.btn-stack-action {
    width: 100%;
    padding: 0.8rem;
    border-radius: 8px;
    font-family: var(--font-heading);
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.btn-stack-copy {
    background: linear-gradient(135deg, var(--accent-green), #00cc52);
    color: #000;
    border: none;
}

.btn-stack-copy:hover {
    box-shadow: var(--shadow-green);
}

.btn-stack-clear {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-stack-clear:hover {
    border-color: #ef4444;
    color: #ef4444;
}

/* Modals & Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(8px);
    z-index: 102;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    width: 90%;
    max-width: 650px;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.6);
    overflow: hidden;
    position: relative;
    animation: modalSlideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
}

.modal-body {
    padding: 1.8rem;
    max-height: 70vh;
    overflow-y: auto;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.3rem;
    cursor: pointer;
    transition: color var(--transition-speed);
}

.modal-close:hover {
    color: var(--accent-cyan);
}

/* Settings Form */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-input {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.8rem 1rem;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: border-color var(--transition-speed);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
}

/* Details Research Panels */
.research-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.pubchem-panel, .pubmed-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.2rem;
}

.panel-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pubmed-paper {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.03);
    padding: 0.8rem;
    border-radius: 8px;
    margin-bottom: 0.8rem;
}

.pubmed-paper:last-child {
    margin-bottom: 0;
}

.paper-title {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.3rem;
}

.paper-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Loaders */
.loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    color: var(--text-secondary);
}

.spinner {
    width: 30px;
    height: 30px;
    border: 3px solid rgba(0, 229, 255, 0.1);
    border-top: 3px solid var(--accent-cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 0.8rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Utilities */
.text-cyan { color: var(--accent-cyan); }
.text-green { color: var(--accent-green); }
.text-purple { color: var(--accent-purple); }

/* Responsive adjustments */
@media(max-width: 768px) {
    .hero h1 {
        font-size: 2.2rem;
    }
    .results-grid {
        grid-template-columns: 1fr;
    }
    .stack-drawer {
        width: 100%;
        right: -100%;
    }
}

/* Toast Notification Styles */
.toast {
    background: rgba(15, 17, 23, 0.9);
    border: 1px solid var(--accent-cyan);
    color: var(--text-primary);
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-cyan);
    font-size: 0.85rem;
    font-weight: 500;
    min-width: 250px;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    animation: toastSlideIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
    backdrop-filter: blur(8px);
}

.toast.success {
    border-color: var(--accent-green);
    box-shadow: var(--shadow-green);
}

.toast.warning {
    border-color: var(--accent-orange);
    box-shadow: 0 0 15px rgba(255, 158, 0, 0.25);
}

@keyframes toastSlideIn {
    from {
        transform: translateY(20px) scale(0.9);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

.toast-fade-out {
    animation: toastFadeOut 0.4s forwards;
}

@keyframes toastFadeOut {
    to {
        transform: translateY(-20px) scale(0.9);
        opacity: 0;
    }
}

/* Alert Box Styles inside Drawer */
.stack-alert-box {
    background: rgba(255, 158, 0, 0.05);
    border: 1px dashed rgba(255, 158, 0, 0.3);
    color: var(--text-primary);
    padding: 0.8rem;
    border-radius: 8px;
    font-size: 0.8rem;
    margin-bottom: 0.6rem;
    display: flex;
    gap: 0.6rem;
    align-items: flex-start;
}

.stack-alert-box:last-child {
    margin-bottom: 0;
}

.stack-alert-icon {
    color: var(--accent-orange);
    font-size: 1rem;
    margin-top: 0.1rem;
}

.stack-alert-text {
    line-height: 1.4;
}