/* ========================================
   HealthApp - Premium Design System
   ======================================== */

/* CSS Variables */
:root {
    /* Colors */
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary: #14b8a6;
    --secondary-light: #2dd4bf;
    --accent: #f472b6;

    /* Semantic Colors */
    --success: #22c55e;
    --warning: #eab308;
    --error: #ef4444;
    --info: #3b82f6;

    /* Background Colors */
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-glass: rgba(255, 255, 255, 0.08);

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #14b8a6 100%);
    --gradient-accent: linear-gradient(135deg, #f472b6 0%, #6366f1 100%);
    --gradient-dark: linear-gradient(180deg, #0f0f1a 0%, #1a1a2e 100%);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
}

/* Reset & Base */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--gradient-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.2;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    background: rgba(15, 15, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(15, 15, 26, 0.95);
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 1.8rem;
    animation: pulse 2s ease-in-out infinite;
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    padding: var(--space-sm) 0;
    transition: var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px var(--space-lg) var(--space-3xl);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.floating-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary);
    bottom: -150px;
    left: -100px;
    animation-delay: -5s;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: var(--accent);
    top: 50%;
    left: 50%;
    animation-delay: -10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    25% {
        transform: translate(30px, -30px) scale(1.05);
    }

    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }

    75% {
        transform: translate(20px, 10px) scale(1.02);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-3xl);
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-full);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(-100%);
    transition: var(--transition-normal);
}

.btn:hover::before {
    transform: translateX(0);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 60px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* ========================================
   Sections
   ======================================== */
.section {
    padding: var(--space-3xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-badge {
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-glass);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    margin-bottom: var(--space-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: var(--space-md);
}

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

/* ========================================
   Chat Section
   ======================================== */
.chat-container {
    max-width: 800px;
    margin: 0 auto;
}

.chat-window {
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    height: 450px;
    display: flex;
    flex-direction: column;
    position: relative;
    backdrop-filter: blur(20px);
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
}

.message {
    max-width: 80%;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    animation: messageSlide 0.3s ease-out;
    position: relative;
}

@keyframes messageSlide {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.bot {
    background: var(--bg-tertiary);
    align-self: flex-start;
    border-bottom-left-radius: var(--radius-sm);
}

.message.user {
    background: var(--gradient-primary);
    align-self: flex-end;
    border-bottom-right-radius: var(--radius-sm);
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

.typing-indicator {
    display: none;
    align-items: center;
    gap: 4px;
    padding: var(--space-md);
    position: absolute;
    bottom: 0;
    left: var(--space-lg);
}

.typing-indicator.active {
    display: flex;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: typing 1.4s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {

    0%,
    60%,
    100% {
        transform: translateY(0);
    }

    30% {
        transform: translateY(-8px);
    }
}

.chat-input-container {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(0, 0, 0, 0.2);
}

.chat-input {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    padding: var(--space-md) var(--space-lg);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.chat-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.chat-input::placeholder {
    color: var(--text-muted);
}

.chat-send-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.chat-send-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.quick-actions {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    margin-top: var(--space-md);
    justify-content: center;
}

.quick-action-btn {
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.quick-action-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--primary);
}

/* ========================================
   Chat Selection Options (Interactive)
   ======================================== */
.chat-selection-container {
    padding: var(--space-md);
    animation: messageSlide 0.3s ease-out;
}

.selection-options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.selection-option-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.selection-option-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-normal);
}

.selection-option-btn:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.2);
}

.selection-option-btn:hover::before {
    opacity: 0.1;
}

.selection-option-btn.selected {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(20, 184, 166, 0.2));
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

.selection-option-btn.selected::before {
    opacity: 0.15;
}

.option-icon {
    font-size: 1.75rem;
    position: relative;
    z-index: 1;
}

.option-label {
    font-size: 0.9rem;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.option-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    position: relative;
    z-index: 1;
}

.option-check {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    opacity: 0.3;
    transition: var(--transition-fast);
}

.selection-option-btn.selected .option-check {
    background: var(--gradient-primary);
    opacity: 1;
    animation: checkPop 0.3s ease-out;
}

@keyframes checkPop {
    0% {
        transform: scale(0);
    }

    50% {
        transform: scale(1.3);
    }

    100% {
        transform: scale(1);
    }
}

.selection-confirm-btn {
    width: 100%;
    padding: var(--space-md) var(--space-xl);
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-full);
    color: white;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-glow);
}

.selection-confirm-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(99, 102, 241, 0.5);
}

.selection-confirm-btn:active {
    transform: translateY(0);
}

/* ========================================
   BMI Calculator
   ======================================== */
.bmi-container {
    max-width: 900px;
    margin: 0 auto;
}

.bmi-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    backdrop-filter: blur(20px);
}

.bmi-inputs {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

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

.input-group label {
    font-weight: 500;
    color: var(--text-secondary);
}

.input-with-unit {
    display: flex;
    gap: var(--space-sm);
}

.input-with-unit input {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1.1rem;
    transition: var(--transition-fast);
}

.input-with-unit input:focus {
    outline: none;
    border-color: var(--primary);
}

.input-with-unit select {
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    color: var(--text-primary);
    font-family: inherit;
    cursor: pointer;
}

.bmi-result {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.bmi-gauge {
    position: relative;
    margin-bottom: var(--space-lg);
}

.gauge-svg {
    width: 200px;
    height: 120px;
}

.gauge-indicator {
    transition: var(--transition-normal);
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.5));
}

.bmi-value {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bmi-category {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.bmi-message {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.bmi-info-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.info-card {
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
    transition: var(--transition-fast);
}

.info-card:hover {
    transform: translateY(-4px);
}

.info-card.underweight {
    border-top: 3px solid var(--secondary);
}

.info-card.normal {
    border-top: 3px solid var(--success);
}

.info-card.overweight {
    border-top: 3px solid var(--warning);
}

.info-card.obese {
    border-top: 3px solid var(--error);
}

.info-range {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.info-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ========================================
   Tasks Section
   ======================================== */
.tasks-container {
    max-width: 700px;
    margin: 0 auto;
}

.task-input-container {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.task-input {
    flex: 1;
    min-width: 200px;
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.task-input:focus {
    outline: none;
    border-color: var(--primary);
}

.task-time {
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    color: var(--text-primary);
    font-family: inherit;
    cursor: pointer;
}

.tasks-stats {
    display: flex;
    gap: var(--space-lg);
    justify-content: center;
    margin-bottom: var(--space-xl);
}

.task-stat {
    text-align: center;
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-xl);
}

.task-stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-light);
}

.task-stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.tasks-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.task-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    transition: var(--transition-fast);
    animation: taskSlide 0.3s ease-out;
}

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

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.task-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.task-item.completed {
    opacity: 0.6;
}

.task-item.completed .task-text {
    text-decoration: line-through;
}

.task-checkbox {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid var(--primary);
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.task-checkbox:hover {
    background: rgba(99, 102, 241, 0.2);
}

.task-checkbox.checked {
    background: var(--gradient-primary);
    border: none;
}

.task-checkbox.checked::after {
    content: '✓';
    color: white;
    font-size: 14px;
}

.task-content {
    flex: 1;
}

.task-text {
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.task-time-display {
    font-size: 0.875rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.task-actions {
    display: flex;
    gap: var(--space-sm);
}

.task-action-btn {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.task-action-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.task-action-btn.delete:hover {
    color: var(--error);
}

.empty-tasks {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-muted);
}

.empty-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--space-md);
}

/* ========================================
   Diet Section
   ======================================== */
.diet-container {
    max-width: 900px;
    margin: 0 auto;
}

.diet-locked {
    text-align: center;
    padding: var(--space-3xl);
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
}

.locked-icon {
    font-size: 4rem;
    margin-bottom: var(--space-lg);
}

.diet-locked h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
}

.diet-locked p {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.diet-plan {
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.diet-summary {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-xl);
    align-items: center;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.calorie-ring {
    position: relative;
    width: 120px;
    height: 120px;
}

.calorie-ring svg {
    transform: rotate(-90deg);
}

.calorie-info {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.calorie-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.calorie-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.macro-breakdown {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.macro-item {
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: center;
    gap: var(--space-md);
}

.macro-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.macro-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.macro-bar.protein .macro-fill {
    background: var(--primary);
}

.macro-bar.carbs .macro-fill {
    background: var(--secondary);
}

.macro-bar.fats .macro-fill {
    background: var(--accent);
}

.macro-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    width: 60px;
}

.macro-value {
    font-weight: 600;
    width: 50px;
    text-align: right;
}

.meals-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.meal-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    transition: var(--transition-fast);
}

.meal-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.meal-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.meal-icon {
    font-size: 2rem;
}

.meal-title {
    font-weight: 600;
}

.meal-time {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.meal-items {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.meal-items li {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
}

.meal-items li:last-child {
    border-bottom: none;
}

.meal-item-calories {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.hidden {
    display: none !important;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--bg-secondary);
    padding: var(--space-2xl) 0 var(--space-lg);
    margin-top: var(--space-3xl);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: var(--space-xl);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ========================================
   Toast Notifications
   ======================================== */
.toast-container {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.toast {
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    animation: toastSlide 0.3s ease-out;
    box-shadow: var(--shadow-lg);
}

@keyframes toastSlide {
    from {
        opacity: 0;
        transform: translateX(100%);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--error);
}

.toast.info {
    border-left: 4px solid var(--info);
}

.toast.warning {
    border-left: 4px solid var(--warning);
}

.toast-icon {
    font-size: 1.25rem;
}

.toast-message {
    flex: 1;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-xs);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .bmi-info-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .meals-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(15, 15, 26, 0.98);
        padding: var(--space-lg);
        gap: var(--space-md);
        border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero-stats {
        gap: var(--space-lg);
    }

    .bmi-card {
        grid-template-columns: 1fr;
    }

    .bmi-info-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .task-input-container {
        flex-direction: column;
    }

    .task-input-container .btn {
        width: 100%;
        justify-content: center;
    }

    .tasks-stats {
        flex-wrap: wrap;
    }

    .diet-summary {
        grid-template-columns: 1fr;
        justify-items: center;
        text-align: center;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .quick-actions {
        flex-direction: column;
    }

    .quick-action-btn {
        width: 100%;
    }

    .bmi-info-cards {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Authentication Pages
   ======================================== */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.auth-bg {
    position: fixed;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}

.auth-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 440px;
}

.auth-card {
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    backdrop-filter: blur(20px);
    animation: fadeInUp 0.6s ease-out;
}

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

.auth-header .logo {
    justify-content: center;
    margin-bottom: var(--space-lg);
}

.auth-title {
    font-size: 1.75rem;
    margin-bottom: var(--space-sm);
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-group label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: var(--space-md);
    font-size: 1.1rem;
    pointer-events: none;
}

.input-wrapper input {
    width: 100%;
    background: var(--bg-tertiary);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-md) var(--space-md) 48px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.input-wrapper input::placeholder {
    color: var(--text-muted);
}

.toggle-password {
    position: absolute;
    right: var(--space-md);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.error-message {
    font-size: 0.8rem;
    color: var(--error);
    min-height: 1rem;
    opacity: 0;
    transition: var(--transition-fast);
}

.error-message.visible {
    opacity: 1;
}

.password-strength {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-xs);
}

.strength-bar {
    flex: 1;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    width: 0;
    border-radius: var(--radius-full);
    transition: var(--transition-normal);
}

.strength-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    min-width: 100px;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.checkbox-wrapper input {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.checkbox-wrapper input:checked+.checkmark {
    background: var(--gradient-primary);
    border-color: transparent;
}

.checkbox-wrapper input:checked+.checkmark::after {
    content: '✓';
    color: white;
    font-size: 0.8rem;
}

.forgot-link,
.terms-link,
.auth-link {
    color: var(--primary-light);
    text-decoration: none;
    transition: var(--transition-fast);
}

.forgot-link:hover,
.terms-link:hover,
.auth-link:hover {
    color: var(--secondary-light);
    text-decoration: underline;
}

.form-message {
    text-align: center;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    min-height: 0;
    overflow: hidden;
    transition: var(--transition-fast);
}

.form-message:empty {
    padding: 0;
}

.form-message.success {
    background: rgba(34, 197, 94, 0.2);
    color: var(--success);
}

.form-message.error {
    background: rgba(239, 68, 68, 0.2);
    color: var(--error);
}

.auth-footer {
    text-align: center;
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
}

.auth-divider span {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.social-login {
    margin-top: var(--space-lg);
}

.social-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.social-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
}

/* ========================================
   User Profile Dropdown
   ======================================== */
.user-profile {
    position: relative;
}

.user-avatar-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.user-avatar-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

.user-name {
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.dropdown-arrow {
    font-size: 0.7rem;
    transition: var(--transition-fast);
}

.user-profile.open .dropdown-arrow {
    transform: rotate(180deg);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + var(--space-sm));
    right: 0;
    min-width: 200px;
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-fast);
    z-index: 100;
}

.user-profile.open .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    font-family: inherit;
    font-size: 0.9rem;
}

.dropdown-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.dropdown-item.logout {
    color: var(--error);
}

.dropdown-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: var(--space-sm) 0;
}

/* Auth buttons for navbar */
.auth-buttons {
    display: flex;
    gap: var(--space-sm);
}

.btn-login {
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-family: inherit;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition-fast);
}

.btn-login:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
}

.btn-signup {
    padding: var(--space-sm) var(--space-md);
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-full);
    color: white;
    font-family: inherit;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition-fast);
}

.btn-signup:hover {
    box-shadow: var(--shadow-glow);
}

/* ========================================
   Dashboard Section
   ======================================== */
.dashboard-section {
    padding: var(--space-2xl) 0;
}

.dashboard-welcome {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.welcome-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: var(--space-sm);
}

.welcome-subtitle {
    color: var(--text-secondary);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.dashboard-card {
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: var(--transition-fast);
}

.dashboard-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.card-title {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.card-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.progress-ring {
    width: 80px;
    height: 80px;
    position: relative;
}

.progress-ring svg {
    transform: rotate(-90deg);
}

.progress-ring-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.1);
    stroke-width: 6;
}

.progress-ring-fill {
    fill: none;
    stroke: url(#progressGradient);
    stroke-width: 6;
    stroke-linecap: round;
    stroke-dasharray: 226;
    stroke-dashoffset: 56;
    transition: stroke-dashoffset 0.5s ease;
}

.progress-text {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

/* Motivational quote */
.quote-card {
    background: var(--gradient-primary);
    border: none;
}

.quote-icon {
    font-size: 2rem;
    margin-bottom: var(--space-md);
}

.quote-text {
    font-size: 1.1rem;
    font-style: italic;
    margin-bottom: var(--space-md);
}

.quote-author {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Hide elements when not logged in */
.logged-in-only {
    display: none;
}

.logged-out-only {
    display: flex;
}

body.logged-in .logged-in-only {
    display: flex;
}

body.logged-in .logged-out-only {
    display: none;
}