/**
 * Agentic Renaissance - Main Stylesheet
 * Design System: Modern Business Professional
 * Mobile-First Responsive Design
 */

/* ============================================
   CSS VARIABLES - DESIGN TOKENS
   ============================================ */

:root {
    /* Colors - Primary Palette */
    --color-primary: #1a365d;        /* Deep Blue - Trust, Expertise */
    --color-primary-light: #2d4a7c;
    --color-primary-dark: #0f2744;
    
    --color-accent: #14b8a6;         /* Electric Teal - Innovation */
    --color-accent-light: #2dd4bf;
    --color-accent-dark: #0f766e;
    
    /* Colors - Neutrals */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-tertiary: #f1f5f9;
    
    --color-text-primary: #1e293b;
    --color-text-secondary: #475569;
    --color-text-tertiary: #64748b;
    --color-text-inverse: #ffffff;
    
    /* Colors - Semantic */
    --color-success: #10b981;
    --color-error: #ef4444;
    --color-warning: #f59e0b;
    --color-info: #3b82f6;
    
    /* Colors - Borders & Dividers */
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-border-dark: #cbd5e1;
    
    /* Typography - Font Families */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    
    /* Typography - Font Sizes */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 1rem;       /* 16px */
    --text-lg: 1.125rem;     /* 18px */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.5rem;      /* 24px */
    --text-3xl: 1.875rem;    /* 30px */
    --text-4xl: 2.25rem;     /* 36px */
    --text-5xl: 3rem;        /* 48px */
    --text-6xl: 3.75rem;     /* 60px */
    
    /* Typography - Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    
    /* Typography - Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Spacing Scale */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    --space-24: 6rem;     /* 96px */
    --space-32: 8rem;     /* 128px */
    
    /* Border Radius */
    --radius-sm: 0.25rem;   /* 4px */
    --radius-md: 0.5rem;    /* 8px */
    --radius-lg: 0.75rem;   /* 12px */
    --radius-xl: 1rem;      /* 16px */
    --radius-2xl: 1.5rem;   /* 24px */
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-Index Scale */
    --z-base: 0;
    --z-dropdown: 1000;
    --z-sticky: 1100;
    --z-fixed: 1200;
    --z-modal-backdrop: 1300;
    --z-modal: 1400;
    --z-popover: 1500;
    --z-tooltip: 1600;
    
    /* Container Max Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    min-height: 100vh;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

h1 {
    font-size: var(--text-5xl);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--text-4xl);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--text-3xl);
}

h4 {
    font-size: var(--text-2xl);
}

h5 {
    font-size: var(--text-xl);
}

h6 {
    font-size: var(--text-lg);
}

p {
    margin-bottom: var(--space-4);
    color: var(--color-text-secondary);
}

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

a:hover {
    color: var(--color-accent-dark);
}

strong {
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
}

/* Responsive Typography */
@media (max-width: 768px) {
    h1 { font-size: var(--text-4xl); }
    h2 { font-size: var(--text-3xl); }
    h3 { font-size: var(--text-2xl); }
    h4 { font-size: var(--text-xl); }
}

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */

.container {
    width: 100%;
    max-width: var(--container-xl);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-6);
    padding-right: var(--space-6);
}

@media (max-width: 640px) {
    .container {
        padding-left: var(--space-4);
        padding-right: var(--space-4);
    }
}

.section {
    padding-top: var(--space-20);
    padding-bottom: var(--space-20);
}

@media (max-width: 768px) {
    .section {
        padding-top: var(--space-12);
        padding-bottom: var(--space-12);
    }
}

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-4);
    padding-bottom: var(--space-4);
}

.nav-logo {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
}

.nav-menu {
    display: flex;
    gap: var(--space-8);
    list-style: none;
}

.nav-link {
    color: var(--color-text-secondary);
    font-weight: var(--font-medium);
    transition: color var(--transition-fast);
}

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

.nav-cta {
    padding: var(--space-2) var(--space-6);
    background-color: var(--color-accent);
    color: var(--color-text-inverse);
    border-radius: var(--radius-md);
    font-weight: var(--font-semibold);
    transition: background-color var(--transition-fast);
}

.nav-cta:hover {
    background-color: var(--color-accent-dark);
    color: var(--color-text-inverse);
}

.social-icon {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* Mobile nav handled in index.php inline styles for hamburger menu */

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-block;
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    line-height: var(--leading-normal);
    text-align: center;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-text-inverse);
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background-color: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    color: var(--color-text-inverse);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-accent {
    background-color: var(--color-accent-light);
    color: var(--color-primary-dark);
    border-color: var(--color-accent-light);
}

.btn-accent:hover {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hero .btn-secondary {
    color: rgba(255, 255, 255, 0.95);
    border-color: rgba(255, 255, 255, 0.8);
}

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

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
}

.btn-small {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    transition: all var(--transition-base);
}

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

.card-title {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--space-3);
    color: var(--color-primary);
}

.card-text {
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    position: relative;
    color: var(--color-text-inverse);
    padding-top: var(--space-24);
    padding-bottom: var(--space-24);
    text-align: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
}

@media (prefers-reduced-motion: reduce) {
    .hero-video {
        display: none;
    }

    .hero-background::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('../agentic-renaissance_hero.jpg') center center / cover no-repeat;
    }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(26, 54, 93, 0.85) 0%, rgba(15, 39, 68, 0.9) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-headline {
    font-size: var(--text-6xl);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    margin-bottom: var(--space-6);
    color: var(--color-text-inverse);
}

.hero-subheadline {
    font-size: var(--text-xl);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-8);
    color: rgba(255, 255, 255, 0.9);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-metrics {
    display: flex;
    justify-content: center;
    gap: var(--space-12);
    margin-bottom: var(--space-10);
    flex-wrap: wrap;
}

.hero-metric {
    text-align: center;
}

.hero-metric-value {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--color-accent-light);
    display: block;
}

.hero-metric-label {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.8);
    margin-top: var(--space-2);
}

.hero-cta-group {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.btn-calendly {
    min-width: 230px;
}

@media (max-width: 768px) {
    .hero {
        padding-top: var(--space-16);
        padding-bottom: var(--space-16);
    }
    
    .hero-headline {
        font-size: var(--text-4xl);
    }
    
    .hero-subheadline {
        font-size: var(--text-lg);
    }
    
    .hero-metrics {
        gap: var(--space-6);
    }
    
    .hero-metric-value {
        font-size: var(--text-3xl);
    }
}

.footer-social-links {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.footer-social-link {
    color: rgba(255, 255, 255, 0.85);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
}

.footer-social-link:hover {
    color: white;
}

/* ============================================
   CONTACT SECTION - DUAL PATH
   ============================================ */

.contact-dual-path {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-8);
    max-width: 1100px;
    margin: 0 auto;
    align-items: start;
}

.contact-path {
    background: var(--color-bg-primary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
}

.contact-path-title {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}

.contact-path-desc {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
    line-height: var(--leading-relaxed);
}

.contact-path-form {
    border-color: var(--color-primary);
}

.contact-path-form .contact-path-title,
.contact-path-form .contact-path-desc {
    text-align: center;
}

.contact-path-calendly {
    border-color: var(--color-accent);
    text-align: center;
}

.contact-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8) 0;
}

.contact-divider span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: 50%;
    font-weight: var(--font-bold);
    color: var(--color-text-tertiary);
    font-size: var(--text-lg);
}

.calendly-widget {
    padding: var(--space-6) 0;
}

.booking-calendar {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    background: var(--color-bg-primary);
}

.booking-calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-3);
}

.booking-calendar-nav {
    border: 1px solid var(--color-border);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--text-lg);
    line-height: 1;
}

.booking-calendar-nav:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.booking-month-label {
    font-weight: var(--font-semibold);
    color: var(--color-primary);
}

.booking-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
    margin-bottom: 6px;
}

.booking-weekdays span {
    text-align: center;
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    font-weight: var(--font-medium);
}

.booking-calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
}

.booking-day {
    border: 1px solid var(--color-border);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    border-radius: var(--radius-sm);
    min-height: 38px;
    cursor: pointer;
    font-size: var(--text-sm);
}

.booking-day:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.booking-day.booking-day-available {
    border-color: var(--color-accent);
}

.booking-day.booking-day-selected {
    background: var(--color-accent);
    color: #ffffff;
    border-color: var(--color-accent);
}

.booking-time-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.booking-time-placeholder {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    margin: 0;
}

.booking-time-item {
    border: 1px solid var(--color-border);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    border-radius: var(--radius-md);
    padding: 0.45rem 0.75rem;
    cursor: pointer;
    font-size: var(--text-sm);
}

.booking-time-item.booking-time-item-selected {
    border-color: var(--color-accent);
    background: rgba(20, 184, 166, 0.12);
    color: var(--color-primary);
}

@media (max-width: 968px) {
    .contact-dual-path {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .contact-divider {
        padding: var(--space-4) 0;
        order: 1;
    }
    
    .contact-path-form {
        order: 2;
    }
    
    .contact-path-calendly {
        order: 0;
    }
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
    margin-bottom: var(--space-6);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    font-family: var(--font-primary);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

/* intl-tel-input overrides */
.iti {
    width: 100%;
}

.iti__country-list {
    z-index: var(--z-dropdown);
    color: var(--color-text-primary);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.1);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.form-radio-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
}

.form-checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    cursor: pointer;
    font-size: var(--text-sm);
}

.form-error {
    color: var(--color-error);
    font-size: var(--text-sm);
    margin-top: var(--space-2);
}

.form-note {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    margin-top: var(--space-2);
}

/* ============================================
   GRID LAYOUTS
   ============================================ */

.grid {
    display: grid;
    gap: var(--space-8);
}

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

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
    .grid-3, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-tertiary); }

.bg-primary { background-color: var(--color-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }
.bg-tertiary { background-color: var(--color-bg-tertiary); }

.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }

.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }

/* ============================================
   ACCESSIBILITY
   ============================================ */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn var(--transition-base) ease-out;
}

.slide-up {
    animation: slideUp var(--transition-base) ease-out;
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .nav, .hero-cta-group, .btn {
        display: none;
    }
    
    body {
        color: #000;
        background: #fff;
    }
}