/* Habitto Website Styles */
/* Design System Colors */
:root {
    /* Primary Colors - Navy Blue Theme */
    --primary: #1C274C;
    --primary-focus: #2A3B5C;
    --primary-container: #F8F9FA;
    --primary-dim: #5A6B7C;
    
    /* Secondary Colors - Pastel Blue */
    --secondary: #B3C4FF;
    --secondary-container: #E8EBF0;
    
    /* Text Colors */
    --text-primary: #000000;
    --text-secondary: #1C274C;
    --text-tertiary: #5A6B7C;
    --text-quaternary: #8A9BA8;
    
    /* Surface Colors */
    --surface: #FFFFFF;
    --surface-2: #F8F9FA;
    --surface-dim: #E8EBF0;
    
    /* System Colors */
    --success: #10B981;
    --error: #EF4444;
    --warning: #F59E0B;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-primary);
    background-color: var(--surface);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--surface-dim);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.logo {
    text-decoration: none;
    display: inline-block;
    cursor: pointer;
    outline: none;
    border: none;
}

.logo:focus {
    outline: none;
    border: none;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.02em;
    transition: opacity 0.2s;
}

.logo:hover .logo-text {
    opacity: 0.8;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-links a.btn-primary {
    color: white !important;
}

.nav-links a.btn-primary:hover {
    color: white !important;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--primary);
    transition: all 0.3s;
}

/* Buttons */
.btn-primary {
    background: var(--primary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--primary-focus);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--primary-container);
    color: var(--primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    transition: all 0.2s;
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-1px);
}

.btn-large {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl);
    background: linear-gradient(180deg, var(--surface) 0%, var(--primary-container) 100%);
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

/* Phone Image */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    transform: none !important;
}

.phone-image {
    max-width: 280px;
    width: 100%;
    height: auto;
    display: block;
    transform: none !important;
}

.app-preview {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.app-header {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--surface-dim);
}

.app-content {
    flex: 1;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.habit-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--surface-2);
    border-radius: var(--radius-md);
    border: 2px solid var(--surface-dim);
    transition: all 0.2s;
}

.habit-card.incomplete {
    border-color: var(--primary);
    background: var(--primary-container);
}

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

.habit-info {
    flex: 1;
}

.habit-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.habit-streak {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.habit-check {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--success);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.habit-checkbox {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 3px solid var(--primary);
    background: transparent;
}

/* Features Section */
.features {
    padding: var(--spacing-2xl) 0;
    background: var(--surface);
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-tertiary);
    max-width: 600px;
    margin: 0 auto;
}

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

.feature-card {
    padding: var(--spacing-lg);
    background: var(--surface-2);
    border-radius: var(--radius-lg);
    border: 1px solid var(--surface-dim);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--text-tertiary);
    line-height: 1.7;
}

/* How It Works Section */
.how-it-works {
    padding: var(--spacing-2xl) 0;
    background: var(--primary-container);
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    text-align: center;
    padding: var(--spacing-lg);
}

.step-number {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    margin: 0 auto var(--spacing-md);
}

.step-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.step-description {
    color: var(--text-tertiary);
    line-height: 1.7;
}

/* Download Section */
.download {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-focus) 100%);
    color: white;
    text-align: center;
}

.download-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.download-description {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.download-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    color: white;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.download-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.download-btn-label {
    font-size: 0.75rem;
    opacity: 0.8;
}

.download-btn-name {
    font-size: 1.125rem;
}

/* Footer */
.footer {
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    background: var(--text-primary);
    color: white;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand .logo {
    text-decoration: none;
    outline: none;
    border: none;
}

.footer-brand .logo:focus {
    outline: none;
    border: none;
}

.footer-brand .logo-text {
    color: white;
    margin-bottom: var(--spacing-sm);
}

.footer-brand .logo:hover .logo-text {
    opacity: 0.8;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    max-width: 300px;
}

.footer-title {
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

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

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-stats {
        justify-content: space-around;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .phone-image {
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero {
        padding: calc(70px + var(--spacing-xl)) 0 var(--spacing-xl);
    }
    
    .download-title {
        font-size: 2rem;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: stretch;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.step {
    animation: fadeInUp 0.6s ease-out;
}

.feature-card:nth-child(2) {
    animation-delay: 0.1s;
}

.feature-card:nth-child(3) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(4) {
    animation-delay: 0.3s;
}