/* ============================================
   The Alignment Puzzle - Main Stylesheet
   ============================================ */

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

:root {
    --color-primary: #1a3a5c;
    --color-primary-light: #2a5a8c;
    --color-accent: #e8a838;
    --color-accent-hover: #d4952e;
    --color-text: #333;
    --color-text-light: #666;
    --color-bg: #ffffff;
    --color-bg-light: #f5f7fa;
    --color-bg-dark: #1a3a5c;
    --color-border: #ddd;
    --font-main: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-heading: 'Open Sans', 'Segoe UI', Roboto, Arial, sans-serif;
    --max-width: 1200px;
    --header-height: 80px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    font-size: 16px;
}

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

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* --- Header & Navigation --- */
.site-header {
    background: var(--color-bg);
    border-bottom: 3px solid #E6E7E8;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.site-logo img {
    height: 55px;
    width: auto;
    object-fit: contain;
    margin-right: 40px;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.main-nav a {
    color: var(--color-primary);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 4px;
    transition: background 0.2s, color 0.2s;
    font-size: 15px;
}

.main-nav a:hover,
.main-nav a.active {
    background: var(--color-primary);
    color: #fff;
}

.nav-cta {
    background: var(--color-accent) !important;
    color: #fff !important;
    font-weight: 600 !important;
}

.nav-cta:hover {
    background: var(--color-accent-hover) !important;
}

.lang-switch {
    margin-left: 12px;
    padding: 6px 12px !important;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 13px !important;
}

/* Hamburger menu */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    display: block;
    width: 26px;
    height: 3px;
    background: var(--color-primary);
    margin: 5px 0;
    border-radius: 2px;
    transition: transform 0.3s;
}

/* --- Hero Section --- */
.hero {
    background: #E6E7E8;
    color: var(--color-text);
    padding: 80px 20px;
}

.hero-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-family: var(--font-heading);
    font-size: 2.6em;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.15em;
    line-height: 1.8;
    opacity: 0.92;
    margin-bottom: 24px;
}

.hero-image {
    flex: 0 0 350px;
    text-align: center;
}

.hero-image img {
    max-height: 420px;
    width: auto;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 5px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--color-accent-hover);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(232, 168, 56, 0.4);
}

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

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: #fff;
    background: var(--color-primary);
}

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

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
}

/* --- Sections --- */
.section {
    padding: 80px 20px;
}

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

.section-dark {
    background: var(--color-bg-dark);
    color: #fff;
}

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

.section-title {
    font-family: var(--font-heading);
    font-size: 2em;
    color: var(--color-primary);
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-dark .section-title {
    color: #fff;
}

.section-subtitle {
    font-size: 1.1em;
    color: var(--color-text-light);
    margin-bottom: 40px;
    max-width: 700px;
}

.section-dark .section-subtitle {
    color: rgba(255,255,255,0.8);
}

/* --- Content blocks with image --- */
.content-block {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 40px;
}

.content-block.reverse {
    flex-direction: row-reverse;
}

.content-block-text {
    flex: 1;
}

.content-block-text h2 {
    font-family: var(--font-heading);
    font-size: 1.8em;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.content-block-text p {
    margin-bottom: 16px;
}

.content-block-image {
    flex: 0 0 45%;
}

.content-block-image img {
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

/* --- Strategy Steps --- */
.strategy-steps {
    list-style: none;
    margin: 0 0 16px 0;
    padding: 0;
    color: var(--color-text-light);
    counter-reset: step;
}

.strategy-steps li {
    counter-increment: step;
    padding-left: 40px;
    position: relative;
    margin-bottom: 10px;
}

.strategy-steps li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 1px;
    width: 26px;
    height: 26px;
    background: #CF3C2D;
    color: #fff;
    border-radius: 50%;
    font-size: 14px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

/* --- Three Principles --- */
.principles {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.principle-card {
    background: #fff;
    border-radius: 8px;
    padding: 36px 28px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    border-top: 4px solid var(--color-accent);
    transition: transform 0.2s, box-shadow 0.2s;
}

.principle-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.principle-number {
    font-size: 2.5em;
    font-weight: 700;
    color: var(--color-accent);
    font-family: var(--font-heading);
    margin-bottom: 12px;
}

.principle-card h3 {
    font-size: 1.2em;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.principle-card p {
    color: var(--color-text-light);
    font-size: 0.95em;
}

/* --- Whitepapers / Downloads --- */
.downloads-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.download-card {
    background: #fff;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    transition: transform 0.2s;
}

.download-card:hover {
    transform: translateY(-4px);
}

.download-card img {
    height: 80px;
    margin-bottom: 16px;
}

.download-card h3 {
    font-size: 1.1em;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.download-card p {
    font-size: 0.9em;
    color: var(--color-text-light);
    margin-bottom: 16px;
}

/* --- Authors --- */
.authors-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.author-card {
    text-align: center;
}

.author-card img {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 16px;
    border: 4px solid #fff;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.author-card h3 {
    font-size: 1.1em;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.author-card p {
    font-size: 0.88em;
    color: var(--color-text-light);
    line-height: 1.6;
}

.author-bio {
    position: relative;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.author-bio.collapsed {
    max-height: 10.4em; /* ~6.5 lines at line-height 1.6 */
}

.author-bio.collapsed::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3em;
    background: linear-gradient(transparent, var(--color-bg-light));
    pointer-events: none;
}

.author-bio.expanded {
    max-height: 1000px;
}

.author-more {
    display: inline-block;
    margin-top: 6px;
    font-size: 0.85em;
    font-weight: 600;
    color: var(--color-primary-light);
    cursor: pointer;
}

.author-more:hover {
    color: var(--color-accent);
}

/* --- Quote --- */
.quote-section {
    background: #ACDBF7;
    color: var(--color-primary);
    text-align: center;
    padding: 60px 20px;
}

.quote-section blockquote {
    font-family: var(--font-heading);
    font-size: 1.6em;
    font-style: italic;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.5;
}

/* --- Video Grid --- */
.video-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.video-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.video-card .video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
}

.video-card .video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-card h3 {
    padding: 16px 20px;
    font-size: 1em;
    color: var(--color-primary);
}

/* --- Contact Form --- */
.contact-form {
    max-width: 600px;
}

.form-group {
    margin-bottom: 20px;
}

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: 5px;
    font-family: var(--font-main);
    font-size: 15px;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px rgba(42, 90, 140, 0.1);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

/* --- Order / Shop --- */
.product-card {
    display: flex;
    gap: 40px;
    background: #fff;
    border-radius: 8px;
    padding: 40px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.product-image {
    flex: 0 0 280px;
    text-align: center;
}

.product-image img {
    max-height: 380px;
    filter: drop-shadow(0 4px 12px rgba(0,0,0,0.15));
}

.product-details h2 {
    font-family: var(--font-heading);
    font-size: 1.8em;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.product-price {
    font-size: 1.8em;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.product-price .tax-info {
    font-size: 0.45em;
    font-weight: 400;
    color: var(--color-text-light);
}

.product-description {
    margin-bottom: 24px;
    color: var(--color-text-light);
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.quantity-selector label {
    font-weight: 600;
}

.quantity-selector input {
    width: 70px;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: 5px;
    text-align: center;
    font-size: 16px;
}

/* --- Footer --- */
.site-footer {
    background: var(--color-bg-dark);
    color: rgba(255,255,255,0.7);
    padding: 40px 20px;
    text-align: center;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.site-footer a {
    color: rgba(255,255,255,0.85);
}

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

.footer-links {
    margin-bottom: 16px;
}

.footer-links a {
    margin: 0 12px;
    font-size: 0.95em;
}

.footer-copy {
    font-size: 0.85em;
    opacity: 0.7;
}

/* --- Page Header (inner pages) --- */
.page-header {
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-primary-light) 100%);
    color: #fff;
    padding: 50px 20px;
    text-align: center;
}

.page-header h1 {
    font-family: var(--font-heading);
    font-size: 2.4em;
    margin-bottom: 10px;
}

.page-header p {
    font-size: 1.1em;
    opacity: 0.85;
}

/* --- Alerts/Messages --- */
.alert {
    padding: 16px 20px;
    border-radius: 5px;
    margin-bottom: 20px;
    font-size: 0.95em;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* --- Responsive --- */
@media (max-width: 968px) {
    .hero-inner {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }

    .hero-image {
        flex: 0 0 auto;
    }

    .hero-image img {
        max-height: 300px;
    }

    .content-block,
    .content-block.reverse {
        flex-direction: column;
    }

    .content-block-image {
        flex: 0 0 auto;
    }

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

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

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

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

    .product-card {
        flex-direction: column;
    }

    .product-image {
        flex: 0 0 auto;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        border-top: 1px solid var(--color-border);
    }

    .main-nav.open {
        display: flex;
    }

    .main-nav a {
        width: 100%;
        text-align: center;
        padding: 12px;
    }

    .lang-switch {
        margin-left: 0;
    }

    .hero-content h1 {
        font-size: 1.8em;
    }

    .section {
        padding: 50px 20px;
    }

    .section-title {
        font-size: 1.6em;
    }

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