/* ===========================================
   TDEE Calculator - Premium Glassmorphic Design
   =========================================== */

:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #121217;
    
    --fire-primary: #FF6B00;
    --fire-secondary: #FF8C00;
    --fire-accent: #FFD700;
    --neon-cyan: #00F5FF;
    --neon-purple: #B026FF;
    --neon-pink: #FF006E;
    
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.5);
    
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

button, a, input, .activity-card, .gender-btn, .goal-card {
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 107, 0, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 245, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(176, 38, 255, 0.15) 0%, transparent 50%);
    z-index: -2;
    animation: backgroundPulse 15s ease-in-out infinite;
    will-change: opacity;
}

@keyframes backgroundPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(90deg, rgba(255, 107, 0, 0.03) 1px, transparent 1px),
        linear-gradient(rgba(255, 107, 0, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -1;
    animation: gridMove 20s linear infinite;
    will-change: transform;
}

@keyframes gridMove {
    0% { transform: translate3d(0, 0, 0); }
    100% { transform: translate3d(50px, 50px, 0); }
}

/* Floating Particles */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    will-change: transform;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: radial-gradient(circle, var(--fire-primary), transparent);
    border-radius: 50%;
    opacity: 0.6;
    animation: float linear infinite;
    will-change: transform, opacity;
}

@keyframes float {
    0% {
        transform: translateY(100vh) translateX(0) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.6;
    }
    100% {
        transform: translateY(-100px) translateX(100px) scale(1);
        opacity: 0;
    }
}

/* Navbar - Glassmorphic */
.navbar {
    background: rgba(10, 10, 15, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.navbar .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 10;
    flex-wrap: wrap;
    gap: 1rem;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    white-space: nowrap;
}

.logo::before {
    content: '';
    position: absolute;
    inset: -10px;
    background: radial-gradient(circle, rgba(255, 107, 0, 0.2), transparent);
    opacity: 0;
    transition: opacity 0.3s;
    border-radius: 50%;
    z-index: -1;
}

.logo:hover::before {
    opacity: 1;
}

.logo:hover {
    transform: translateX(-3px);
    filter: drop-shadow(0 0 10px rgba(255, 107, 0, 0.8));
}

.logo i {
    color: var(--fire-primary);
}

.logo .accent {
    background: linear-gradient(135deg, var(--fire-primary), var(--fire-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.back-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(255, 107, 0, 0.2), transparent);
    transform: translate(-50%, -50%);
    transition: width 0.5s, height 0.5s;
    border-radius: 50%;
}

.back-btn:hover::before {
    width: 300px;
    height: 300px;
}

.back-btn:hover {
    border-color: var(--fire-primary);
    box-shadow: 0 0 20px rgba(255, 107, 0, 0.3);
    transform: translateX(-5px);
}

/* Main Container */
.calculator-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
    position: relative;
    z-index: 10;
}

/* Hero Section */
.hero-section {
    margin-bottom: var(--spacing-xl);
}

.hero-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

/* Metrics Display */
.metrics-display {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.metric-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 16px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.metric-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 107, 0, 0.1), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.metric-item:hover::before {
    opacity: 1;
}

.metric-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(255, 107, 0, 0.2);
}

.metric-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    font-size: 2.5rem;
    flex-shrink: 0;
    position: relative;
}

.metric-icon.fire-glow {
    background: linear-gradient(135deg, rgba(255, 107, 0, 0.2), rgba(255, 140, 0, 0.2));
    color: var(--fire-primary);
    animation: fireGlow 2s ease-in-out infinite;
}

.metric-icon.heart-glow {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(220, 38, 38, 0.2));
    color: #EF4444;
    animation: heartbeat 1.5s ease-in-out infinite;
}

.metric-icon.muscle-glow {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(37, 99, 235, 0.2));
    color: #3B82F6;
    animation: muscleGlow 2s ease-in-out infinite;
}

@keyframes fireGlow {
    0%, 100% { 
        box-shadow: 0 0 20px rgba(255, 107, 0, 0.4);
        transform: scale(1);
    }
    50% { 
        box-shadow: 0 0 30px rgba(255, 107, 0, 0.6);
        transform: scale(1.05);
    }
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    10% { transform: scale(1.1); }
    20% { transform: scale(1); }
    30% { transform: scale(1.1); }
    40% { transform: scale(1); }
}

@keyframes muscleGlow {
    0%, 100% { 
        box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
    }
    50% { 
        box-shadow: 0 0 30px rgba(59, 130, 246, 0.6);
    }
}

.metric-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.metric-value {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--text-primary);
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.metric-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Hero Text Section */
.hero-text-section {
    text-align: center;
}

.hero-main-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.title-line {
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.title-highlight {
    background: linear-gradient(135deg, var(--fire-primary), var(--fire-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
}

.title-highlight::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--fire-primary), transparent);
    border-radius: 2px;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Old Hero Styles - KEEP FOR BACKWARDS COMPATIBILITY BUT HIDDEN */

/* Calculator Card - Glassmorphic */
.calculator-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    padding: var(--spacing-xl);
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    position: relative;
}

.calculator-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 30px;
    padding: 2px;
    background: linear-gradient(135deg, rgba(255, 107, 0, 0.3), rgba(0, 245, 255, 0.3), rgba(176, 38, 255, 0.3));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0.5;
    animation: borderShine 3s linear infinite;
}

@keyframes borderShine {
    0% { opacity: 0.3; }
    50% { opacity: 0.7; }
    100% { opacity: 0.3; }
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--fire-secondary), var(--fire-accent), var(--neon-cyan));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 20px rgba(255, 107, 0, 0.4));
}

/* Form */
.calculator-form {
    max-width: 900px;
    margin: 0 auto;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.input-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.input-group label i {
    color: var(--fire-primary);
    filter: drop-shadow(0 0 5px rgba(255, 107, 0, 0.5));
}

.input-group input {
    width: 100%;
    padding: 1.1rem 1.3rem;
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
    border: 2px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1.05rem;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.3s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--fire-primary);
    box-shadow: 0 0 0 4px rgba(255, 107, 0, 0.1), 0 0 20px rgba(255, 107, 0, 0.2);
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

.input-wrapper {
    position: relative;
}

/* Gender Buttons - Glassmorphic */
.gender-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.gender-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 2px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.gender-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 107, 0, 0.1), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.gender-btn:hover::before {
    opacity: 1;
}

.gender-btn i {
    font-size: 1.8rem;
    transition: transform 0.3s;
}

.gender-btn:hover {
    border-color: var(--fire-primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255, 107, 0, 0.2);
}

.gender-btn:hover i {
    transform: scale(1.1);
}

.gender-btn.active {
    border-color: var(--fire-primary);
    background: rgba(255, 107, 0, 0.15);
    color: var(--text-primary);
    box-shadow: 0 0 30px rgba(255, 107, 0, 0.3);
}

.gender-btn.active i {
    color: var(--fire-primary);
}

/* Unit Switcher - Glassmorphic */
.unit-switcher {
    position: absolute;
    right: 0.6rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: 0.25rem;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border-radius: 8px;
    padding: 0.3rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.unit-btn {
    padding: 0.5rem 0.9rem;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-tertiary);
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
}

.unit-btn.active {
    background: linear-gradient(135deg, var(--fire-primary), var(--fire-secondary));
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(255, 107, 0, 0.4);
}

/* Activity Grid */
.activity-group {
    grid-column: 1 / -1;
}

.activity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.activity-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1.8rem 1.2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 2px solid var(--glass-border);
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.activity-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(255, 107, 0, 0.2), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

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

.activity-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 107, 0, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    margin-bottom: var(--spacing-sm);
    transition: all 0.4s;
    position: relative;
}

.activity-icon::after {
    content: '';
    position: absolute;
    inset: -5px;
    background: linear-gradient(135deg, var(--fire-primary), var(--neon-cyan));
    border-radius: 50%;
    opacity: 0;
    filter: blur(15px);
    transition: opacity 0.3s;
    z-index: -1;
}

.activity-card:hover .activity-icon::after {
    opacity: 0.6;
}

.activity-icon i {
    font-size: 2rem;
    color: var(--fire-primary);
    transition: transform 0.3s;
}

.activity-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
    color: var(--text-primary);
}

.activity-card p {
    font-size: 0.9rem;
    color: var(--text-tertiary);
}

.activity-card:hover {
    border-color: var(--fire-primary);
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(255, 107, 0, 0.3);
}

.activity-card:hover .activity-icon {
    transform: scale(1.1) rotate(5deg);
}

.activity-card:hover .activity-icon i {
    transform: scale(1.1);
}

.activity-card.active {
    border-color: var(--fire-primary);
    background: rgba(255, 107, 0, 0.12);
    box-shadow: 0 20px 50px rgba(255, 107, 0, 0.4);
    transform: scale(1.05);
}

.activity-card.active .activity-icon {
    background: linear-gradient(135deg, var(--fire-primary), var(--fire-secondary));
    box-shadow: 0 0 30px rgba(255, 107, 0, 0.6);
}

.activity-card.active .activity-icon i {
    color: white;
}

/* Calculate Button - Premium */
.calculate-btn {
    grid-column: 1 / -1;
    width: 100%;
    padding: 1.5rem 2.5rem;
    background: linear-gradient(135deg, var(--fire-primary), var(--fire-secondary), var(--fire-accent));
    background-size: 200% 200%;
    border: none;
    border-radius: 16px;
    color: var(--text-primary);
    font-size: 1.3rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    transition: all 0.4s;
    margin-top: var(--spacing-md);
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(255, 107, 0, 0.4);
    animation: gradientShift 3s ease infinite;
    will-change: transform;
    -webkit-tap-highlight-color: transparent;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.calculate-btn::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 0.5s;
}

.calculate-btn:hover::before {
    left: 100%;
}

.calculate-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 50px rgba(255, 107, 0, 0.6);
}

.calculate-btn:active {
    transform: translateY(-1px) scale(0.98);
}

/* Results Section - Glassmorphic */
.results-section {
    display: none;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
}

.results-section.active {
    display: block;
}

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

.results-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--fire-primary), var(--fire-accent), var(--neon-cyan));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 20px rgba(255, 107, 0, 0.5));
}

/* TDEE Result - Premium Glass */
.tdee-result {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 2px solid var(--fire-primary);
    border-radius: 20px;
    box-shadow: 
        0 0 50px rgba(255, 107, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.tdee-result::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent 0deg, rgba(255, 107, 0, 0.2) 90deg, transparent 180deg);
    animation: rotate 4s linear infinite;
    will-change: transform;
}

.tdee-result::after {
    content: '';
    position: absolute;
    inset: 2px;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-radius: 18px;
    z-index: 1;
}

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

.tdee-result > * {
    position: relative;
    z-index: 2;
}

.tdee-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 3px;
}

.tdee-number {
    font-size: 5.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--fire-accent), var(--fire-primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin: 1.5rem 0;
    filter: drop-shadow(0 0 30px rgba(255, 107, 0, 0.6));
    animation: numberPulse 2s ease-in-out infinite;
    will-change: transform;
}

@keyframes numberPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

.tdee-unit {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 600;
}

/* Breakdown Grid - Glass Cards */
.breakdown-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.breakdown-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 2px solid var(--glass-border);
    border-radius: 16px;
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}

.breakdown-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 107, 0, 0.1), transparent);
    transition: left 0.6s;
}

.breakdown-card:hover::before {
    left: 100%;
}

.breakdown-card:hover {
    border-color: var(--fire-primary);
    transform: translateX(5px);
    box-shadow: 0 10px 40px rgba(255, 107, 0, 0.3);
}

.breakdown-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 107, 0, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 14px;
    transition: all 0.3s;
}

.breakdown-card:hover .breakdown-icon {
    transform: scale(1.1) rotate(-5deg);
    box-shadow: 0 0 30px rgba(255, 107, 0, 0.5);
}

.breakdown-icon i {
    font-size: 2.2rem;
    color: var(--fire-primary);
}

.breakdown-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.breakdown-value {
    font-size: 2.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--fire-primary), var(--fire-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.breakdown-desc {
    font-size: 0.9rem;
    color: var(--text-tertiary);
}

/* Chart - Glass */
.chart-section {
    padding: var(--spacing-xl);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 2px solid var(--glass-border);
    border-radius: 20px;
    margin-bottom: var(--spacing-xl);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.chart-section h3 {
    font-size: 1.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--fire-primary), var(--fire-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Goals - Premium Glass Cards */
.goals-section {
    margin-bottom: var(--spacing-lg);
}

.goals-section h3 {
    font-size: 1.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--fire-primary), var(--fire-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.goals-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.goal-card {
    padding: var(--spacing-xl);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 2px solid var(--glass-border);
    border-radius: 18px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.goal-card::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0;
    background: linear-gradient(to top, rgba(255, 107, 0, 0.15), transparent);
    transition: height 0.4s;
}

.goal-card:hover::before {
    height: 100%;
}

.goal-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 50px rgba(255, 107, 0, 0.4);
}

.goal-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 107, 0, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    margin: 0 auto var(--spacing-sm);
    transition: all 0.4s;
    position: relative;
}

.goal-card:hover .goal-icon {
    transform: scale(1.15) rotateY(360deg);
    box-shadow: 0 0 30px rgba(255, 107, 0, 0.6);
}

.goal-icon i {
    font-size: 1.7rem;
}

.goal-card h4 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 2;
}

.goal-value {
    font-size: 2.2rem;
    font-weight: 900;
    margin: var(--spacing-sm) 0;
    position: relative;
    z-index: 2;
}

.goal-card p {
    font-size: 0.95rem;
    color: var(--text-tertiary);
    position: relative;
    z-index: 2;
}

.goal-card.loss {
    border-color: #3B82F6;
}

.goal-card.loss .goal-icon {
    background: rgba(59, 130, 246, 0.1);
}

.goal-card.loss .goal-icon i {
    color: #3B82F6;
}

.goal-card.loss .goal-value {
    background: linear-gradient(135deg, #3B82F6, #60A5FA);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.goal-card.maintain {
    border-color: #10B981;
}

.goal-card.maintain .goal-icon {
    background: rgba(16, 185, 129, 0.1);
}

.goal-card.maintain .goal-icon i {
    color: #10B981;
}

.goal-card.maintain .goal-value {
    background: linear-gradient(135deg, #10B981, #34D399);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.goal-card.gain {
    border-color: var(--fire-primary);
}

.goal-card.gain .goal-icon i {
    color: var(--fire-primary);
}

.goal-card.gain .goal-value {
    background: linear-gradient(135deg, var(--fire-primary), var(--fire-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Recalculate Button - Glass */
.recalculate-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    padding: 1.2rem 2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 2px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1.15rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.recalculate-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 107, 0, 0.1), rgba(0, 245, 255, 0.1));
    opacity: 0;
    transition: opacity 0.3s;
}

.recalculate-btn:hover::before {
    opacity: 1;
}

.recalculate-btn:hover {
    border-color: var(--fire-primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255, 107, 0, 0.3);
}

.recalculate-btn i {
    transition: transform 0.3s;
}

.recalculate-btn:hover i {
    transform: rotate(180deg);
}

/* Ripple Effect */
.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 107, 0, 0.5);
    transform: scale(0);
    animation: ripple-animation 0.6s ease-out;
    pointer-events: none;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* Macro Calculator Section */
.macro-section {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 2px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.macro-section h3 {
    font-size: 1.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--neon-cyan), var(--fire-primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.macro-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.macro-card {
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
    border: 2px solid var(--glass-border);
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.macro-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 107, 0, 0.05), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

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

.macro-card:hover {
    border-color: var(--fire-primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(255, 107, 0, 0.2);
}

.macro-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 107, 0, 0.1);
    border-radius: 50%;
    font-size: 1.5rem;
}

.macro-card.protein .macro-icon {
    background: rgba(59, 130, 246, 0.1);
    color: #3B82F6;
}

.macro-card.carbs .macro-icon {
    background: rgba(16, 185, 129, 0.1);
    color: #10B981;
}

.macro-card.fats .macro-icon {
    background: rgba(255, 107, 0, 0.1);
    color: var(--fire-primary);
}

.macro-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.macro-value {
    font-size: 2rem;
    font-weight: 900;
    margin: 0.5rem 0;
}

.macro-card.protein .macro-value {
    color: #3B82F6;
}

.macro-card.carbs .macro-value {
    color: #10B981;
}

.macro-card.fats .macro-value {
    color: var(--fire-primary);
}

.macro-desc {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

/* Tooltip */
.tooltip {
    position: relative;
    display: inline-block;
    cursor: help;
}

.tooltip-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    background: rgba(255, 107, 0, 0.2);
    border-radius: 50%;
    font-size: 0.7rem;
    color: var(--fire-primary);
    margin-left: 0.3rem;
}

.tooltip-content {
    visibility: hidden;
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    padding: 0.75rem 1rem;
    min-width: 200px;
    background: rgba(26, 26, 31, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.4;
    z-index: 100;
    opacity: 0;
    transition: all 0.3s;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.tooltip-content::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: rgba(26, 26, 31, 0.95);
}

.tooltip:hover .tooltip-content {
    visibility: visible;
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Export Button */
.export-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 2px solid var(--glass-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin: var(--spacing-sm) auto;
}

.export-btn:hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 5px 20px rgba(0, 245, 255, 0.3);
    transform: translateY(-2px);
}

.export-btn i {
    font-size: 1.1rem;
}

/* Footer - Glass */
.calculator-footer {
    background: rgba(10, 10, 15, 0.7);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
    position: relative;
    z-index: 10;
}

.calculator-footer .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    position: relative;
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--fire-primary), var(--fire-accent));
    transition: width 0.3s;
}

.footer-links a:hover::after {
    width: 100%;
}

.footer-links a:hover {
    color: var(--fire-primary);
}

/* Responsive */
@media (max-width: 1024px) {
    .calculator-container {
        padding: 2rem 1.5rem;
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .activity-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    /* Disable expensive animations on mobile */
    .calculator-card::before,
    .tdee-result::before,
    body::after {
        animation: none;
    }
    
    /* Reduce backdrop blur for performance */
    .calculator-card,
    .navbar,
    .results-section > * {
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
    }
    
    /* Navbar Mobile */
    .navbar {
        padding: 0.75rem 0;
    }
    
    .navbar .container {
        padding: 0 1rem;
        gap: 0.75rem;
    }
    
    .logo {
        font-size: 1.2rem;
    }
    
    .logo i {
        font-size: 1.2rem;
    }
    
    .back-btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
        gap: 0.4rem;
    }
    
    .back-btn i {
        font-size: 0.9rem;
    }
    
    /* Hero Section Mobile */
    .metrics-display {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 1.5rem;
    }
    
    .metric-item {
        padding: 1.25rem;
    }
    
    .metric-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }
    
    .metric-value {
        font-size: 2rem;
    }
    
    .metric-label {
        font-size: 0.8rem;
    }
    
    .hero-main-title {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-icon {
        width: 100px;
        height: 100px;
        font-size: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .calculator-card {
        padding: 2rem 1.5rem;
        border-radius: 20px;
    }
    
    .section-title {
        font-size: 1.8rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .activity-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .activity-card {
        padding: 1.5rem 1rem;
    }
    
    .calculate-btn {
        font-size: 1.1rem;
        padding: 1.25rem 2rem;
    }

    .breakdown-grid,
    .goals-grid,
    .macro-grid {
        grid-template-columns: 1fr;
    }

    .tdee-number {
        font-size: 3.5rem;
    }
    
    .tdee-result {
        padding: 2rem 1.5rem;
    }
    
    .breakdown-card {
        padding: 1.5rem;
    }
    
    .chart-section,
    .macro-section {
        padding: 1.5rem;
    }
    
    .goal-card {
        padding: 1.5rem;
    }

    .calculator-footer .container {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    /* Hide particles on mobile for performance */
    .particles {
        display: none;
    }
}

@media (max-width: 480px) {
    .calculator-container {
        padding: 1.5rem 1rem;
    }
    
    /* Extra small navbar */
    .navbar {
        padding: 0.5rem 0;
    }
    
    .navbar .container {
        padding: 0 0.75rem;
        gap: 0.5rem;
        justify-content: center;
    }
    
    .logo {
        font-size: 1rem;
        gap: 0.3rem;
    }
    
    .logo i {
        font-size: 1rem;
    }
    
    .logo .accent {
        font-size: 1rem;
    }
    
    .back-btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
        border-radius: 8px;
    }
    
    .back-btn span {
        display: none;
    }
    
    .back-btn i {
        font-size: 1.1rem;
        margin: 0;
    }
    
    /* Hero Section Extra Small */
    .hero-content {
        gap: 2rem;
    }
    
    .metrics-display {
        padding: 1.25rem;
        gap: 0.75rem;
    }
    
    .metric-item {
        padding: 1rem;
        gap: 1rem;
    }
    
    .metric-icon {
        width: 50px;
        height: 50px;
        font-size: 1.75rem;
    }
    
    .metric-value {
        font-size: 1.75rem;
    }
    
    .metric-label {
        font-size: 0.75rem;
    }
    
    .hero-main-title {
        font-size: 2rem;
    }
    
    .title-highlight::after {
        display: none;
    }
    
    .hero-description {
        font-size: 0.9rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-icon {
        width: 80px;
        height: 80px;
        font-size: 2.5rem;
    }
    
    .calculator-card {
        padding: 1.5rem 1rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .form-group input {
        padding: 0.9rem 1rem;
        font-size: 1rem;
    }
    
    .gender-btn {
        padding: 1rem;
        font-size: 0.9rem;
    }
    
    .activity-card {
        padding: 1.25rem 0.75rem;
    }
    
    .activity-icon {
        width: 50px;
        height: 50px;
    }
    
    .activity-icon i {
        font-size: 1.5rem;
    }
    
    .tdee-number {
        font-size: 2.5rem;
    }
    
    .breakdown-value,
    .goal-value {
        font-size: 1.8rem;
    }
    
    .macro-value {
        font-size: 1.6rem;
    }
}

@media (max-width: 360px) {
    /* Very small devices */
    .navbar .container {
        padding: 0 0.5rem;
    }
    
    .logo {
        font-size: 0.9rem;
    }
    
    .logo i {
        font-size: 0.9rem;
    }
    
    .logo span span.accent {
        display: none;
    }
    
    .back-btn {
        padding: 0.4rem 0.6rem;
    }
    
    .back-btn span::before {
        content: 'Home';
    }
    
    .back-btn span {
        font-size: 0;
    }
    
    .back-btn i {
        font-size: 1rem;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-icon {
        width: 70px;
        height: 70px;
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.3rem;
    }
    
    .tdee-number {
        font-size: 2rem;
    }
}

/* ===== MACROS CALCULATOR SPECIFIC STYLES ===== */

/* APPLE-STYLE: Initial animation states */
.metrics-display,
.metric-item,
.hero-text-section,
.title-line,
.hero-description,
.calculator-card,
.input-group,
.calculate-btn {
    opacity: 0;
}

/* Goal Selection Cards */
.goal-selection {
    margin-top: var(--spacing-md);
}

.goal-select {
    cursor: pointer;
    border: 2px solid var(--glass-border);
    padding: 1.5rem;
}

.goal-select .goal-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 107, 0, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    margin: 0 auto 1rem;
    transition: all 0.4s;
}

.goal-select .goal-icon i {
    font-size: 2rem;
    color: var(--fire-primary);
    transition: all 0.3s;
}

.goal-select:hover .goal-icon {
    transform: scale(1.1);
    box-shadow: 0 0 30px rgba(255, 107, 0, 0.4);
}

.goal-select.active {
    transform: scale(1.05);
    border-color: var(--fire-primary);
    background: rgba(255, 107, 0, 0.12);
    box-shadow: 0 0 30px rgba(255, 107, 0, 0.3);
}

.goal-select.active .goal-icon {
    background: linear-gradient(135deg, var(--fire-primary), var(--fire-secondary));
    box-shadow: 0 0 30px rgba(255, 107, 0, 0.6);
}

.goal-select.active .goal-icon i {
    color: white;
    transform: scale(1.1);
}

.goal-select h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-align: center;
}

.goal-select p {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    text-align: center;
    margin: 0;
}

/* Macro Cards Additional Info */
.macro-cals {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 0.5rem;
    font-weight: 500;
}

.macro-card:hover .macro-cals {
    color: var(--text-secondary);
}

.input-wrapper {
    position: relative;
}

@media (max-width: 768px) {
    .goal-selection {
        grid-template-columns: 1fr;
    }
    
    .goal-select .goal-icon {
        width: 60px;
        height: 60px;
    }
    
    .goal-select .goal-icon i {
        font-size: 1.8rem;
    }
}