/* ========================================
   Fitbam Landing Page - Light Mode Styles
   ======================================== */

/* CSS Custom Properties */
:root {
    /* Colors - Light Mode */
    --color-bg: #ffffff;
    --color-bg-elevated: #f8fafc;
    --color-bg-card: #ffffff;
    --color-border: rgba(0, 0, 0, 0.08);

    --color-text: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #94a3b8;

    --color-primary: #22c55e;
    --color-primary-dark: #16a34a;
    --color-secondary: #10b981;

    --gradient-primary: linear-gradient(135deg, #22c55e 0%, #10b981 100%);
    --gradient-hero: linear-gradient(180deg, #f0fdf4 0%, #ffffff 100%);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;
    --radius-full: 9999px;

    /* Shadows - Light Mode */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 25px 50px rgba(0, 0, 0, 0.15);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-glow: 0 0 40px rgba(34, 197, 94, 0.25);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

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

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
    color: var(--color-text);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-xl);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn-primary {
    background: #000;
    color: #fff;
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    color: #fff;
    background: #1a1a1a;
}

.btn-large {
    padding: var(--space-5) var(--space-10);
    font-size: var(--font-size-lg);
}

.btn-icon {
    width: 20px;
    height: 20px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-4) 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text);
}

.logo:hover {
    color: var(--color-text);
}

.logo-icon {
    font-size: var(--font-size-2xl);
}

.nav-cta {
    padding: var(--space-2) var(--space-6);
    background: #000;
    color: #fff;
    font-weight: 600;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
}

.nav-cta:hover {
    color: #fff;
    background: #1a1a1a;
    transform: scale(1.05);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-24) 0 var(--space-16);
    overflow: hidden;
    background: var(--gradient-hero);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-6);
    color: var(--color-text);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    max-width: 500px;
    line-height: 1.7;
}

.hero-cta {
    margin-bottom: var(--space-10);
}

.hero-stats {
    display: flex;
    gap: var(--space-10);
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-primary);
}

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

/* Phone Mockup */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    position: relative;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {

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

    50% {
        transform: translateY(-15px);
    }
}

.phone-frame {
    width: 280px;
    height: 580px;
    background: linear-gradient(145deg, #1f2937 0%, #111827 100%);
    border-radius: 45px;
    padding: 10px;
    box-shadow:
        0 50px 100px rgba(0, 0, 0, 0.25),
        0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    position: relative;
    z-index: 1;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 38px;
    overflow: hidden;
    padding: var(--space-6);
}

.phone-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(34, 197, 94, 0.15) 0%, transparent 70%);
    z-index: 0;
    filter: blur(40px);
}

/* App Preview inside phone */
.app-preview {
    color: var(--color-text);
}

.app-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.app-date {
    color: var(--color-primary);
    font-weight: 600;
}

.app-calories {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-6);
}

.calories-ring {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 8px solid #e5e7eb;
    border-top-color: var(--color-primary);
    border-right-color: var(--color-secondary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    animation: pulse 2s ease-in-out infinite;
    background: #fff;
}

@keyframes pulse {

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

    50% {
        transform: scale(1.02);
    }
}

.calories-value {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--color-text);
}

.calories-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.app-macros {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-6);
}

.macro {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
}

.macro-bar {
    width: 40px;
    height: 6px;
    border-radius: var(--radius-full);
}

.macro-bar.protein {
    background: #ef4444;
}

.macro-bar.carbs {
    background: #3b82f6;
}

.macro-bar.fat {
    background: #eab308;
}

.macro-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.macro-value {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
}

.app-meal {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    background: #f8fafc;
    padding: var(--space-3);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.meal-image {
    font-size: var(--font-size-2xl);
}

.meal-info {
    display: flex;
    flex-direction: column;
}

.meal-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
}

.meal-cal {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* Hero Background */
.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.6;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: rgba(34, 197, 94, 0.15);
    top: -200px;
    right: -100px;
    animation: orb-float 8s ease-in-out infinite;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: rgba(16, 185, 129, 0.1);
    bottom: -100px;
    left: -100px;
    animation: orb-float 10s ease-in-out infinite reverse;
}

@keyframes orb-float {

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

    50% {
        transform: translate(30px, -30px);
    }
}

/* Features Section */
.features {
    padding: var(--space-24) 0;
    position: relative;
    background: var(--color-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-card);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(34, 197, 94, 0.3);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-4);
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-3);
    color: var(--color-text);
}

.feature-desc {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

/* How It Works Section */
.how-it-works {
    padding: var(--space-24) 0;
    background: var(--color-bg-elevated);
}

.steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: var(--space-4);
}

.step {
    flex: 1;
    max-width: 280px;
    text-align: center;
    padding: var(--space-8);
    position: relative;
}

.step-number {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    color: #fff;
    font-weight: 800;
    font-size: var(--font-size-sm);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    margin-top: var(--space-8);
}

.step-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--color-text);
}

.step-desc {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.step-connector {
    width: 60px;
    height: 2px;
    background: var(--color-border);
    margin-top: 100px;
    flex-shrink: 0;
}

/* Testimonials Section */
.testimonials {
    padding: var(--space-24) 0;
    background: var(--color-bg);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.testimonial-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-card);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: rgba(34, 197, 94, 0.3);
}

.testimonial-text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-6);
    font-style: italic;
}

.testimonial-text::before {
    content: '"';
    color: var(--color-primary);
    font-weight: 700;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: var(--color-bg-elevated);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 600;
    font-style: normal;
    color: var(--color-text);
}

.author-title {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* CTA Section */
.cta {
    padding: var(--space-24) 0;
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, #f0fdf4 0%, #dcfce7 100%);
}

.cta .container {
    position: relative;
    z-index: 1;
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.cta-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
}

.cta-note {
    margin-top: var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.cta-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.orb-3 {
    width: 500px;
    height: 500px;
    background: rgba(34, 197, 94, 0.1);
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
}

.orb-4 {
    width: 300px;
    height: 300px;
    background: rgba(16, 185, 129, 0.1);
    bottom: -100px;
    right: 10%;
}

/* Footer */
.footer {
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border);
    padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-12);
}

.footer-brand .logo {
    margin-bottom: var(--space-3);
}

.footer-tagline {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.footer-links {
    display: flex;
    gap: var(--space-16);
}

.footer-col h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--color-text);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.footer-col a {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
        margin-bottom: var(--space-8);
    }

    .phone-mockup {
        transform: scale(0.85);
    }

    .features-grid,
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: var(--font-size-3xl);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .features-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .steps {
        flex-direction: column;
        align-items: center;
    }

    .step-connector {
        width: 2px;
        height: 40px;
        margin: 0;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--space-8);
    }

    .footer-links {
        flex-direction: column;
        gap: var(--space-6);
    }

    .cta-title {
        font-size: var(--font-size-3xl);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-4);
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--space-4);
    }

    .phone-mockup {
        transform: scale(0.75);
    }

    .btn {
        width: 100%;
    }
}

/* Scroll animations */
.feature-card,
.testimonial-card,
.step {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.feature-card.visible,
.testimonial-card.visible,
.step.visible {
    opacity: 1;
    transform: translateY(0);
}