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

/* CSS Custom Design System Properties */
:root {
    --bg-primary: #0b0f19;
    --bg-secondary: rgba(17, 24, 39, 0.7);
    --bg-card: rgba(30, 41, 59, 0.45);
    
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-glass-active: rgba(139, 92, 246, 0.4);
    
    --accent-violet: #8b5cf6;
    --accent-violet-hover: #7c3aed;
    --accent-violet-glow: rgba(139, 92, 246, 0.35);
    
    --accent-pink: #ec4899;
    --accent-blue: #3b82f6;
    --accent-emerald: #10b981;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --font-heading: 'Outfit', 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius-lg: 16px;
    --border-radius-md: 10px;
}

/* Reset and Core Layout */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(at 10% 10%, rgba(139, 92, 246, 0.12) 0px, transparent 40%),
        radial-gradient(at 90% 90%, rgba(59, 130, 246, 0.12) 0px, transparent 40%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    padding: 2rem 1rem;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.app-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Typography & Titles */
header {
    text-align: center;
    margin-bottom: 2.5rem;
}

h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #ffffff 30%, var(--accent-violet) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Layout Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    align-items: start;
}

@media (min-width: 992px) {
    .dashboard-grid {
        grid-template-columns: 1.1fr 1.9fr;
    }
}

/* Glassmorphism Card System */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    transition: var(--transition-smooth);
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.12);
    box-shadow: 0 15px 35px -5px rgba(0, 0, 0, 0.6);
}

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

label {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.input-control {
    width: 100%;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-md);
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-smooth);
}

.input-control:focus {
    outline: none;
    border-color: var(--accent-violet);
    box-shadow: 0 0 0 3px var(--accent-violet-glow);
    background: rgba(15, 23, 42, 0.8);
}

/* Two-column Input Groups */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.75rem;
}

/* Toggle & Radio Custom Styles */
.unit-toggle {
    display: flex;
    background: rgba(15, 23, 42, 0.6);
    padding: 0.25rem;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-glass);
    margin-bottom: 1.5rem;
}

.unit-toggle select {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-weight: 600;
    padding: 0.5rem;
    outline: none;
    cursor: pointer;
}

.unit-toggle select option {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.gender-select-wrapper {
    display: flex;
    gap: 1rem;
}

.gender-option {
    flex: 1;
    position: relative;
}

.gender-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.gender-label {
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-md);
    padding: 0.75rem;
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
    user-select: none;
}

.gender-option input[type="radio"]:checked + .gender-label {
    background: var(--accent-violet-glow);
    border-color: var(--accent-violet);
    color: var(--text-primary);
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.2);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    accent-color: var(--accent-violet);
    width: 1.15rem;
    height: 1.15rem;
    cursor: pointer;
}

/* Buttons */
.btn-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.btn {
    width: 100%;
    padding: 0.85rem;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    border-radius: var(--border-radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-violet) 0%, var(--accent-violet-hover) 100%);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.5);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

/* Results Formatting styling */
.results-container {
    display: none; /* Controlled via JS */
    animation: fadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.results-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .results-grid {
        grid-template-columns: 1fr 1fr;
    }
    .full-width-result {
        grid-column: span 2;
    }
}

/* Key Metrics Cards */
.metric-card {
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-md);
    padding: 1.25rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}

.metric-card.violet::before { background: var(--accent-violet); }
.metric-card.emerald::before { background: var(--accent-emerald); }
.metric-card.pink::before { background: var(--accent-pink); }
.metric-card.blue::before { background: var(--accent-blue); }

.metric-title {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.metric-value {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
}

.metric-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Multi-Target Compare Panel */
.targets-box {
    margin-top: 1.5rem;
}

.target-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.target-row:last-child {
    border-bottom: none;
}

.target-label {
    display: flex;
    flex-direction: column;
}

.target-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.target-subtext {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.target-calories {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.05rem;
}

/* Macros section layout */
.macros-panel {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    align-items: center;
}

@media (min-width: 768px) {
    .macros-panel {
        grid-template-columns: 1.2fr 0.8fr;
    }
}

.macro-table-container {
    width: 100%;
}

.macro-select-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.macro-select-bar select {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    padding: 0.4rem 0.75rem;
    border-radius: var(--border-radius-md);
    font-family: var(--font-heading);
    font-weight: 600;
    cursor: pointer;
}

.macro-table {
    width: 100%;
    border-collapse: collapse;
}

.macro-table th, .macro-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.macro-table th {
    font-family: var(--font-heading);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
}

.macro-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 8px;
}
.indicator-carb { background: var(--accent-violet); }
.indicator-prot { background: var(--accent-pink); }
.indicator-fat { background: var(--accent-blue); }

.chart-wrapper {
    position: relative;
    height: 200px;
    width: 100%;
}

/* Warning & Security/Help Blocks */
.warning-block {
    display: none; /* Managed by JS */
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.35);
    border-radius: var(--border-radius-md);
    padding: 1rem 1.25rem;
    margin-top: 1.5rem;
    gap: 0.75rem;
    align-items: flex-start;
}

.warning-icon {
    font-size: 1.2rem;
    color: #ef4444;
}

.warning-text {
    font-size: 0.85rem;
    color: #fca5a5;
    line-height: 1.5;
}

.info-cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 2rem;
}

@media (min-width: 768px) {
    .info-cards-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.info-card {
    background: rgba(15, 23, 42, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: var(--border-radius-md);
    padding: 1.25rem;
}

.info-card h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.badge-sec {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-emerald);
    padding: 0.2rem 0.5rem;
    font-size: 0.7rem;
    border-radius: 4px;
    font-family: var(--font-heading);
    font-weight: 800;
    text-transform: uppercase;
}

/* Tooltip definitions */
.tooltip-term {
    border-bottom: 1px dashed var(--text-muted);
    cursor: help;
    position: relative;
    display: inline-block;
}

/* Custom Scrollbar for modern feel */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(139, 92, 246, 0.3);
}