/* ========================================
   BIPOLAR ADVANTAGE - Main Stylesheet
   Dark Teal Color Palette
   ======================================== */

/* --- CSS Variables --- */
:root {
    /* Typography */
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-heading: 'Georgia', serif;

    /* Layout */
    --max-width: 1200px;
    --max-width-narrow: 800px;

    /* Colors - Dark Teal Palette */
    --color-primary: #0d7377;
    --color-primary-dark: #065a5e;
    --color-primary-light: #e6f4f5;
    --color-accent: #d4a843;
    --color-accent-dark: #b8922e;
    --color-text: #1a1a1a;
    --color-text-light: #555;
    --color-text-muted: #777;
    --color-bg: #fff;
    --color-bg-light: #f5f8f8;
    --color-bg-warm: #faf9f6;
    --color-border: #e0e5e5;
    --color-success: #16a34a;
    --color-error: #b91c1c;
    --color-footer-bg: #1a2e2e;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;

    /* Shadows */
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);

    /* Border Radius */
    --radius: 6px;
    --radius-lg: 12px;

    /* Transitions */
    --transition: 0.15s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

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

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

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

/* --- Layout --- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.content-narrow {
    max-width: var(--max-width-narrow);
    margin: 0 auto;
}

/* --- Header --- */
.site-header {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.site-logo {
    display: flex;
    align-items: baseline;
    gap: 10px;
    color: var(--color-text);
    text-decoration: none;
}

.site-logo strong {
    font-size: 1.25rem;
    letter-spacing: 1px;
    color: var(--color-primary);
    font-weight: 700;
}

.site-logo span {
    font-size: 0.8rem;
    color: var(--color-text-light);
    display: none;
}

@media (min-width: 768px) {
    .site-logo span {
        display: inline;
    }
}

/* Navigation */
.site-nav ul {
    list-style: none;
    display: flex;
    gap: 4px;
    align-items: center;
}

.site-nav a {
    display: block;
    padding: 8px 14px;
    font-size: 0.9rem;
    color: var(--color-text-light);
    border-radius: var(--radius);
    transition: background var(--transition), color var(--transition);
}

.site-nav a:hover,
.site-nav a.active {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
}

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 32px;
    height: 24px;
    position: relative;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    position: absolute;
    left: 0;
    transition: transform 0.2s, opacity 0.2s;
}

.nav-toggle span:nth-child(1) {
    top: 0;
}

.nav-toggle span:nth-child(2) {
    top: 11px;
}

.nav-toggle span:nth-child(3) {
    top: 22px;
}

.nav-toggle.open span:nth-child(1) {
    transform: translateY(11px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
    transform: translateY(-11px) rotate(-45deg);
}

@media (max-width: 767px) {
    .nav-toggle {
        display: block;
    }

    .site-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow);
        padding: 12px 0;
    }

    .site-nav.open {
        display: block;
    }

    .site-nav ul {
        flex-direction: column;
        padding: 0 16px;
    }

    .site-nav a {
        padding: 10px 14px;
    }
}

/* --- Navigation Button --- */
.btn-nav {
    padding: 8px 18px;
    font-size: 0.85rem;
    background: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 600;
    transition: background var(--transition);
    white-space: nowrap;
}

.btn-nav:hover {
    background: var(--color-accent-dark);
}

/* --- Hero Section --- */
.hero {
    padding: var(--spacing-xxl) var(--spacing-md);
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-bg) 100%);
    text-align: center;
}

.hero .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    line-height: 1.2;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-md);
}

.hero p {
    font-size: 1.2rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin-bottom: var(--spacing-md);
}

@media (max-width: 767px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }
}

/* --- Page Header --- */
.page-header {
    padding: var(--spacing-xl) var(--spacing-md);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    text-align: center;
}

.page-header h1 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.page-header p {
    font-size: 1.1rem;
    opacity: 0.95;
}

@media (max-width: 767px) {
    .page-header h1 {
        font-size: 1.8rem;
    }
}

/* --- Content Sections --- */
section {
    padding: var(--spacing-xxl) var(--spacing-md);
}

section h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

section p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

@media (max-width: 767px) {
    section {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    section h2 {
        font-size: 1.6rem;
    }
}

/* --- Pillar Grid --- */
.pillar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.pillar-card {
    padding: var(--spacing-lg);
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: transform var(--transition), box-shadow var(--transition);
}

.pillar-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.pillar-card h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.pillar-card p {
    font-size: 0.95rem;
    line-height: 1.8;
}

/* --- CTA Band --- */
.cta-band {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
}

.cta-band h2 {
    color: #fff;
    margin-bottom: var(--spacing-md);
}

.cta-band p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
}

/* --- Stats Section --- */
.stats {
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--color-bg-light);
}

.stats .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.stat-item {
    text-align: center;
}

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

.stat-label {
    font-size: 1rem;
    color: var(--color-text-light);
}

/* --- Testimonial Section --- */
.testimonial-section {
    background: var(--color-bg-warm);
    padding: var(--spacing-xxl) var(--spacing-md);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

@media (min-width: 768px) {
    .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.testimonial {
    background: #fff;
    padding: var(--spacing-lg);
    border-left: 4px solid var(--color-accent);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.testimonial p {
    font-style: italic;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.testimonial-author {
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.95rem;
}

.testimonial-title {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 12px 28px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
    text-decoration: none;
}

.btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--color-accent);
    color: #fff;
}

.btn-secondary:hover {
    background: var(--color-accent-dark);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
}

/* --- Forms --- */
.form-group {
    margin-bottom: var(--spacing-md);
}

label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.95rem;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="date"],
textarea,
select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="date"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(13, 115, 119, 0.1);
}

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

/* --- Pricing Section --- */
.pricing-section {
    background: var(--color-bg-light);
    padding: var(--spacing-xxl) var(--spacing-md);
}

.pricing-cards {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
}

.pricing-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    min-width: 280px;
    background: #fff;
    transition: transform var(--transition), box-shadow var(--transition);
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
}

.pricing-card.featured {
    border-color: var(--color-primary);
    border-width: 2px;
    box-shadow: 0 8px 32px rgba(13, 115, 119, 0.15);
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    box-shadow: 0 12px 48px rgba(13, 115, 119, 0.25);
}

.pricing-card h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

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

.pricing-period {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

.pricing-features {
    text-align: left;
    list-style: none;
    margin: var(--spacing-lg) 0;
}

.pricing-features li {
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.95rem;
    color: var(--color-text-light);
}

.pricing-features li:last-child {
    border-bottom: none;
}

/* --- Blog Grid --- */
.blog-section {
    padding: var(--spacing-xxl) var(--spacing-md);
}

.blog-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

@media (min-width: 768px) {
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.blog-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #fff;
    transition: transform var(--transition), box-shadow var(--transition);
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.blog-card-image {
    width: 100%;
    height: 200px;
    background: var(--color-bg-light);
    object-fit: cover;
}

.blog-card-body {
    padding: 20px 24px;
}

.blog-card-meta {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}

.blog-card h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--color-primary);
}

.blog-card p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* --- Article Content --- */
.article-content {
    max-width: var(--max-width-narrow);
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

.article-meta {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.article-content h1 {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-lg);
    line-height: 1.3;
}

.article-content h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-primary);
    margin: 32px 0 16px 0;
    line-height: 1.3;
}

.article-content h3 {
    font-size: 1.2rem;
    color: var(--color-primary);
    margin: 24px 0 12px 0;
}

.article-content p {
    margin-bottom: 16px;
    line-height: 1.8;
    color: var(--color-text);
}

.article-content strong {
    color: var(--color-primary-dark);
    font-weight: 600;
}

.article-content ul,
.article-content ol {
    margin-bottom: 16px;
    margin-left: 24px;
}

.article-content li {
    margin-bottom: 8px;
    color: var(--color-text);
    line-height: 1.8;
}

.article-content blockquote {
    border-left: 4px solid var(--color-accent);
    padding-left: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    font-style: italic;
    color: var(--color-text-light);
}

.article-content img {
    max-width: 100%;
    height: auto;
    margin: var(--spacing-lg) 0;
    border-radius: var(--radius-lg);
}

/* --- Footer --- */
.site-footer {
    background: var(--color-footer-bg);
    color: rgba(255, 255, 255, 0.9);
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    display: block;
    padding: 6px 0;
    transition: color var(--transition);
}

.footer-section a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
}

/* --- Utility Classes --- */
.text-center {
    text-align: center;
}

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

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.pt-lg {
    padding-top: var(--spacing-lg);
}

.pb-lg {
    padding-bottom: var(--spacing-lg);
}

.bg-light {
    background: var(--color-bg-light);
}

.bg-accent-light {
    background: rgba(212, 168, 67, 0.1);
}

.border-top {
    border-top: 1px solid var(--color-border);
}

.border-bottom {
    border-bottom: 1px solid var(--color-border);
}

/* --- Responsive Adjustments --- */
@media (max-width: 767px) {
    .site-nav {
        display: none;
    }

    .pillar-grid {
        grid-template-columns: 1fr;
    }

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

    .pricing-card.featured {
        transform: scale(1);
    }

    .testimonial-grid {
        grid-template-columns: 1fr;
    }

    .blog-grid {
        grid-template-columns: 1fr;
    }
}

/* --- Accessibility --- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* --- Print Styles --- */
@media print {
    .site-header,
    .site-footer,
    .nav-toggle,
    .cta-band {
        display: none;
    }

    body {
        background: #fff;
        color: #000;
    }

    a {
        color: var(--color-primary);
        text-decoration: underline;
    }
}