/* Main CSS - Base styles and variables */

:root {
    /* Colors from P1.express app */
    --color-bg: #ffffff;
    --color-surface: #fafafa;
    --color-border: #e0e0e0;
    --color-text-primary: #172b4d;
    --color-text-secondary: #5e6c84;
    --color-accent: #0052cc;
    --color-accent-hover: #0747a6;
    
    /* Status colors (from app) */
    --color-doing: #7c3aed;
    --color-postponed: #f59e0b;
    --color-finished: #059669;
    --color-cancelled: #dc2626;
    
    /* Neutral colors */
    --color-neutral: #6b7280;
    --color-danger: #dc2626;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Container width */
    --container-max-width: 1200px;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
    z-index: 1000;
    transition: background-color var(--transition-base), border-color var(--transition-base);
}

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

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

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

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger {
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    display: block;
    position: relative;
    transition: background-color var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: transform var(--transition-fast);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

.mobile-menu {
    display: none;
    flex-direction: column;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
}

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

.mobile-menu-link {
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.mobile-menu-link:hover {
    background-color: var(--color-bg);
    color: var(--color-accent);
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
}

/* Sections */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-alt {
    background-color: var(--color-surface);
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

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

@media (max-width: 768px) {
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .section-title {
        font-size: 1.875rem;
    }
    
    .section-description {
        font-size: 1rem;
    }
}

/* Hero Section */
.hero {
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    color: var(--color-text-primary);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.stat {
    font-weight: 600;
    color: var(--color-accent);
}

.stat-separator {
    color: var(--color-border);
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
}

/* Content Box */
.content-box {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
}

.large-text {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

.method-note {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

/* Features List */
.features-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.feature-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.feature-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.feature-text h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.feature-text p {
    color: var(--color-text-secondary);
}

/* Links */
.link-accent {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.link-accent:hover {
    color: var(--color-accent-hover);
    text-decoration: underline;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Smooth Scrolling */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}