/* ==========================================================================
   Moonwater - CSS Styles
   Design: Bold, minimal, high-contrast inspired by 37signals
   ========================================================================== */

/* CSS Custom Properties (Variables)
   ========================================================================== */
:root {
    /* Colors - Bold blue palette */
    --color-bg: #3E30FF;
    --color-text: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-link: #ffffff;
    --color-link-hover: rgba(255, 255, 255, 0.7);
    --color-border: rgba(255, 255, 255, 0.15);
    --color-button-bg: #ffffff;
    --color-button-text: #3E30FF;
    --color-button-hover: rgba(255, 255, 255, 0.9);
    
    /* Typography */
    --font-family: 'Satoshi', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 18px;
    --font-size-sm: 14px;
    --font-size-xs: 12px;
    --font-size-lg: 20px;
    --font-size-xl: 23px;
    --font-size-2xl: 28px;
    
    /* Spacing */
    --space-sm: 12px;
    --space-md: 20px;
    --space-lg: 28px;
    --space-xl: 64px;
    --space-2xl: 72px;
    
    /* Layout */
    --max-width: 640px;
    --header-height: 64px;
    
    /* Transitions */
    --transition-fast: 120ms ease-out;
    --transition-medium: 200ms ease-out;
}

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.25;
}

p {
    margin-bottom: 0.75em;
}

p:last-child {
    margin-bottom: 0;
}

strong {
    font-weight: 700;
}

a {
    color: var(--color-link);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 2px;
    transition: color var(--transition-fast);
}

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

/* Header - Desktop
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.header-inner {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: var(--font-size-lg);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.cta-button {
    display: inline-block;
    padding: 10px 20px;
    background: var(--color-button-bg);
    color: var(--color-button-text);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.cta-button:hover {
    background: var(--color-button-hover);
    color: var(--color-button-text);
    transform: translateY(-1px);
}

/* Main Content
   ========================================================================== */
.main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: calc(var(--header-height) + var(--space-xl)) var(--space-md) var(--space-xl);
}

/* Principles Section
   ========================================================================== */
.principles {
    margin-bottom: var(--space-2xl);
}

.principle {
    padding: 8px 0;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.principle:first-child {
    padding-top: 0;
}

.principles:hover .principle:not(:hover) {
    opacity: 0.35;
}

/* Scroll-based fade for principles */
.principle.fade-in {
    opacity: 0.25;
}

.principle-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.3em;
    line-height: 1.1;
}

.principle.expanded .principle-title {
    margin-bottom: 10px;
}

.principle-number {
    color: rgba(255, 255, 255, 0.55);
    font-weight: 700;
}

/* Toggle button styled as link */
.principle-toggle {
    background: none;
    border: none;
    padding: 0;
    font: inherit;
    font-size: inherit;
    font-weight: 700;
    color: var(--color-link);
    text-decoration: none;
    cursor: pointer;
    text-align: left;
    transition: opacity var(--transition-fast);
}

.principle-toggle:hover {
    opacity: 0.7;
}

.principle-toggle:focus-visible {
    outline: 2px solid var(--color-text);
    outline-offset: 2px;
}

a.principle-date {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text-secondary);
    white-space: nowrap;
    text-decoration: none;
    transition: color var(--transition-fast);
}

a.principle-date:hover {
    color: var(--color-text);
}

.principle-date em {
    font-style: normal;
}

.principle-content {
    color: rgba(255, 255, 255, 0.75);
    font-size: var(--font-size-base);
    line-height: 1.5;
    padding-left: 2.6em;
    padding-top: 4px;
    padding-bottom: 8px;
    overflow: hidden;
}

.principle-content[hidden] {
    display: none;
}

.principle-content strong {
    color: var(--color-text);
}

/* Testimonials Section
   ========================================================================== */
.testimonials {
    padding: var(--space-xl) 0;
}

.testimonials-headline {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--space-lg);
    letter-spacing: 0.02em;
}

.testimonials-container {
    overflow: hidden;
    position: relative;
}

.testimonials-track {
    display: flex;
    transition: transform 400ms ease;
}

.testimonial {
    min-width: 100%;
    padding: 0;
}

.testimonial blockquote {
    text-align: center;
}

.testimonial p {
    font-size: var(--font-size-xl);
    font-weight: 600;
    line-height: 1.5;
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

.testimonial cite {
    display: block;
    font-style: normal;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* Navigation Dots */
.testimonials-nav {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: var(--space-lg);
}

.nav-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    padding: 0;
    transition: all var(--transition-fast);
}

.nav-dot:hover {
    background: rgba(255, 255, 255, 0.6);
}

.nav-dot.active {
    background: var(--color-text);
    transform: scale(1.3);
}

.nav-dot:focus {
    outline: 2px solid var(--color-text);
    outline-offset: 2px;
}

/* Footer
   ========================================================================== */
.footer {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-xl) var(--space-md) var(--space-lg);
    text-align: center;
}

.footer p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin: 0;
}

/* Responsive Design
   ========================================================================== */

/* Tablet */
@media (max-width: 900px) {
    :root {
        --font-size-base: 16px;
        --font-size-2xl: 24px;
    }
    
    .header-inner {
        padding: 0 var(--space-md);
    }
}

/* Mobile */
@media (max-width: 680px) {
    :root {
        --font-size-base: 15px;
        --font-size-2xl: 20px;
        --font-size-lg: 16px;
        --space-md: 16px;
        --space-xl: 36px;
        --header-height: 56px;
    }
    
    .header-inner {
        padding: 0 var(--space-sm);
    }
    
    .cta-button {
        padding: 8px 14px;
        font-size: var(--font-size-xs);
    }
    
    .principle {
        padding: 6px 0;
    }
    
    .principle-title {
        gap: 0.25em;
    }
    
    .principle-content {
        padding-left: 0;
    }
    
    /* Disable hover fade on mobile */
    .principles:hover .principle:not(:hover) {
        opacity: 1;
    }
    
    .testimonial p {
        font-size: var(--font-size-lg);
    }
    
}

/* Small Mobile */
@media (max-width: 400px) {
    :root {
        --font-size-2xl: 18px;
    }
    
    .logo {
        font-size: var(--font-size-base);
    }
}

/* Accessibility
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    .testimonials-track {
        transition: none;
    }
    
    .nav-dot,
    .cta-button,
    a {
        transition: none;
    }
}

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-text);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .header,
    .testimonials-nav {
        display: none;
    }
    
    .main {
        padding-top: 0;
    }
    
    .testimonials-track {
        display: block;
    }
    
    .testimonial {
        page-break-inside: avoid;
        margin-bottom: var(--space-md);
    }
}

/* Contact Modal
   ========================================================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: var(--space-md);
}

.modal-overlay[hidden] {
    display: none;
}

.modal {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    width: 100%;
    max-width: 440px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.3);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* Contact Form
   ========================================================================== */
.contact-form {
    padding: var(--space-lg);
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--color-text);
}

.form-group .optional {
    font-weight: 400;
    color: var(--color-text-secondary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.15);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-submit {
    width: 100%;
    padding: 14px 20px;
    background: var(--color-button-bg);
    color: var(--color-button-text);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 600;
    border: 2px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-top: var(--space-sm);
}

.form-submit:hover {
    background: var(--color-bg);
    color: var(--color-text);
    border: 2px solid var(--color-text);
    transform: translateY(-1px);
}

.form-submit:active {
    transform: translateY(0);
}

.form-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Mobile Modal - Full screen feel */
@media (max-width: 680px) {
    .modal-overlay {
        padding: 0;
        align-items: flex-end;
    }
    
    .modal {
        max-width: 100%;
        max-height: 95vh;
        border-radius: 16px 16px 0 0;
        border-bottom: none;
    }
    
    .modal-header {
        padding: var(--space-md);
    }
    
    .contact-form {
        padding: var(--space-md);
    }
}