/* CSS Variables */
:root {
    --color-primary: #3057a2;
    --color-secondary: #f9a825;
    --color-white: #ffffff;
    --color-gray-light: #f5f5f5;
    --color-gray: #e0e0e0;
    --color-gray-dark: #757575;
    --color-text: #333333;
    --font-main: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background: var(--color-gray-light);
    color: var(--color-text);
    line-height: 1.6;
}

/* Page Layout */
.page {
    width: 210mm;
    min-height: 297mm;
    margin: 20px auto;
    padding: 40px 50px;
    background: var(--color-white);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    page-break-after: always;
}

/* Cover Page */
.cover-page {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, #0d1450 100%);
    color: var(--color-white);
}

.cover-content {
    text-align: center;
}

.cover-logo {
    width: 220px;
    height: auto;
    margin-bottom: 40px;
    filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.3));
}

.cover-page h1 {
    font-size: 48px;
    font-weight: 800;
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.cover-page .subtitle {
    font-size: 24px;
    font-weight: 300;
    opacity: 0.9;
    margin-bottom: 40px;
}

.cover-line {
    width: 80px;
    height: 4px;
    background: var(--color-secondary);
    margin: 0 auto 40px;
}

.cover-page .version {
    font-size: 14px;
    opacity: 0.7;
    letter-spacing: 2px;
}

/* Table of Contents */
.toc-page {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.toc-page h2 {
    font-size: 36px;
    color: var(--color-primary);
    margin-bottom: 50px;
    text-transform: uppercase;
    letter-spacing: 3px;
}

.toc {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.toc a {
    display: flex;
    align-items: center;
    gap: 20px;
    text-decoration: none;
    color: var(--color-text);
    font-size: 20px;
    padding: 15px 20px;
    border-bottom: 2px solid var(--color-gray);
    transition: all 0.3s ease;
}

.toc a:hover {
    background: var(--color-gray-light);
    border-color: var(--color-primary);
}

.toc-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    color: var(--color-white);
    font-weight: 700;
    font-size: 18px;
    border-radius: 50%;
}

/* Section Headers */
.section-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 3px solid var(--color-primary);
}

.section-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--color-primary);
    color: var(--color-white);
    font-weight: 800;
    font-size: 24px;
    border-radius: 50%;
}

.section-header h2 {
    font-size: 32px;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-intro {
    font-size: 16px;
    color: var(--color-gray-dark);
    margin-bottom: 40px;
    max-width: 600px;
}

/* Logo Versions */
.logo-versions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 40px;
}

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

.logo-card h3 {
    font-size: 18px;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.logo-display {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    border-radius: 12px;
    margin-bottom: 15px;
}

.logo-display img {
    max-width: 160px;
    height: auto;
}

.light-bg {
    background: var(--color-white);
    border: 2px solid var(--color-gray);
}

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

.neutral-bg {
    background: var(--color-gray-light);
    border: 2px dashed var(--color-gray);
}

.logo-card p {
    font-size: 14px;
    color: var(--color-gray-dark);
}

/* Color Palette */
.color-palette {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    margin-top: 40px;
}

.color-card {
    background: var(--color-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.color-swatch {
    height: 100px;
}

.color-info {
    padding: 20px;
}

.color-info h4 {
    font-size: 16px;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.color-info p {
    font-size: 13px;
    color: var(--color-gray-dark);
    font-family: monospace;
    margin-bottom: 5px;
}

.color-use {
    display: inline-block;
    margin-top: 10px;
    padding: 4px 12px;
    background: var(--color-gray-light);
    border-radius: 20px;
    font-size: 12px;
    color: var(--color-primary);
    font-weight: 600;
}

/* Usage Grid */
.usage-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
    margin-top: 30px;
}

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

.usage-example {
    margin-bottom: 15px;
}

.example-box {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 140px;
    border-radius: 10px;
    overflow: hidden;
}

.example-box img {
    max-width: 100px;
    height: auto;
}

.usage-label {
    font-size: 14px;
    font-weight: 500;
}

.check {
    color: #2e7d32;
    font-weight: 700;
    margin-right: 5px;
}

.cross {
    color: #c62828;
    font-weight: 700;
    margin-right: 5px;
}

/* Incorrect Use Effects */
.stretched img {
    transform: scaleX(1.5);
}

.busy-bg {
    background: repeating-linear-gradient(45deg,
            #ff6b6b,
            #ff6b6b 10px,
            #ffd93d 10px,
            #ffd93d 20px,
            #6bcb77 20px,
            #6bcb77 30px,
            #4d96ff 30px,
            #4d96ff 40px);
}

.rotated img {
    transform: rotate(25deg);
}

.wrong-color img {
    filter: hue-rotate(120deg) saturate(1.5);
}

.low-opacity img {
    opacity: 0.3;
}

.shadow-effect img {
    filter: drop-shadow(5px 5px 10px rgba(0, 0, 0, 0.5));
}

.proportional {
    padding: 20px;
}

.proportional img {
    border: 2px dashed var(--color-secondary);
    padding: 15px;
}

/* Apparel Section */
.apparel-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 30px;
}

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

.apparel-card h4 {
    font-size: 16px;
    color: var(--color-primary);
    margin-bottom: 5px;
}

.apparel-card p {
    font-size: 13px;
    color: var(--color-gray-dark);
}

/* Realistic Mockups */
.apparel-grid.mockups {
    gap: 20px;
}

.mockup-image {
    background: var(--color-gray-light);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 15px;
}

.mockup-image img {
    width: 100%;
    height: 200px;
    object-fit: contain;
    display: block;
}

.apparel-preview {
    height: 180px;
    border-radius: 12px;
    margin-bottom: 15px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.polo-dark {
    background: var(--color-primary);
}

.polo-light {
    background: var(--color-white);
    border: 2px solid var(--color-gray);
}

.jacket-dark {
    background: linear-gradient(180deg, #2c387e 0%, var(--color-primary) 100%);
}

.cap-dark {
    background: var(--color-primary);
    border-radius: 12px 12px 50% 50%;
    height: 150px;
}

.polo-collar,
.polo-collar-light {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 30px;
    border-radius: 0 0 30px 30px;
}

.polo-collar {
    background: #0d1450;
}

.polo-collar-light {
    background: var(--color-gray);
}

.jacket-zipper {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 100%;
    background: linear-gradient(180deg, #c0c0c0 0%, #808080 100%);
}

.cap-visor {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 25px;
    background: #0d1450;
    border-radius: 0 0 60px 60px;
}

.logo-placement img {
    max-width: 50px;
    height: auto;
}

.logo-placement.left {
    position: absolute;
    top: 50%;
    left: 25%;
    transform: translate(-50%, -50%);
}

.logo-placement.center-back img {
    max-width: 80px;
}

.logo-placement.center-cap {
    position: relative;
    top: -10px;
}

.logo-placement.center-cap img {
    max-width: 40px;
}

/* Placement Guide */
.placement-guide {
    margin-top: 40px;
    padding: 25px;
    background: var(--color-gray-light);
    border-radius: 12px;
    border-left: 4px solid var(--color-secondary);
}

.placement-guide h3 {
    font-size: 18px;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.placement-rules {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.rule {
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.rule-icon {
    font-size: 20px;
}

.rule strong {
    display: block;
    color: var(--color-primary);
    font-size: 14px;
}

.rule p {
    font-size: 13px;
    color: var(--color-gray-dark);
    margin-top: 3px;
}

/* Footer Page */
.footer-page {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-gray-light) 0%, var(--color-white) 100%);
}

.footer-content {
    text-align: center;
}

.footer-logo {
    width: 150px;
    height: auto;
    margin-bottom: 30px;
}

.footer-content h2 {
    font-size: 28px;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.footer-tagline {
    font-size: 16px;
    color: var(--color-gray-dark);
    margin-bottom: 30px;
}

.footer-line {
    width: 60px;
    height: 3px;
    background: var(--color-secondary);
    margin: 0 auto 30px;
}

.copyright {
    font-size: 12px;
    color: var(--color-gray-dark);
    margin-bottom: 10px;
}

.contact {
    font-size: 12px;
    color: var(--color-gray-dark);
}

/* Studio Credits Watermark */
.studio-credits {
    position: absolute;
    bottom: 30px;
    right: 40px;
    display: flex;
    align-items: center;
    gap: 12px;
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

.studio-credits:hover {
    opacity: 1;
}

.studio-logo {
    width: 100px;
    height: auto;
    filter: invert(50%) sepia(0%) saturate(0%) brightness(50%);
}

.credits-text {
    text-align: left;
}

.credits-text p {
    font-size: 10px;
    color: var(--color-gray-dark);
    margin-bottom: 2px;
}

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

.credits-text a {
    font-size: 10px;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.credits-text a:hover {
    text-decoration: underline;
}

.footer-page {
    position: relative;
}

/* Action Buttons */
.action-buttons {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    gap: 10px;
    z-index: 100;
}

.action-buttons button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border: none;
    border-radius: 50px;
    font-family: var(--font-main);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.action-buttons button:hover {
    transform: translateY(-3px);
}

.action-buttons button span {
    font-size: 18px;
}

/* Print Button */
.print-btn {
    background: var(--color-primary);
    color: var(--color-white);
}

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

/* Print Styles */
/* Print Styles */
@media print {
    @page {
        margin: 0;
        size: auto;
    }

    body {
        background: white;
        margin: 1cm;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
        color-adjust: exact !important;
    }

    .page {
        margin: 0;
        box-shadow: none;
        page-break-after: auto;
        page-break-inside: avoid;
        break-inside: avoid;
        border: none;
        padding: 0;
        width: 100%;
    }

    /* Avoid breaking headers from their content */
    h2,
    h3,
    h4,
    .section-header {
        break-after: avoid;
        page-break-after: avoid;
    }

    /* Keep cards together */
    .logo-card,
    .color-card,
    .usage-example,
    .apparel-card,
    .placement-guide {
        break-inside: avoid;
        page-break-inside: avoid;
    }

    .color-swatch {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
        border: 1px solid #ddd;
    }

    .action-buttons,
    .print-btn,
    .pdf-btn {
        display: none !important;
    }

    .toc a:hover {
        background: transparent;
    }

    .studio-credits {
        opacity: 1;
        position: static;
        margin-top: 40px;
        justify-content: center;
        page-break-inside: avoid;
    }
}

/* Responsive */
@media screen and (max-width: 800px) {
    .page {
        width: 100%;
        min-height: auto;
        padding: 30px;
        margin: 10px 0;
    }

    .cover-page h1 {
        font-size: 32px;
    }

    .logo-versions,
    .color-palette,
    .usage-grid,
    .apparel-grid {
        grid-template-columns: 1fr;
    }

    .placement-rules {
        grid-template-columns: 1fr;
    }

    .action-buttons {
        bottom: 15px;
        right: 15px;
        flex-direction: column;
        gap: 8px;
    }

    .action-buttons button {
        padding: 10px 16px;
        font-size: 12px;
    }

    .studio-credits {
        position: static;
        margin-top: 30px;
        justify-content: center;
        width: 100%;
    }

    .footer-page {
        flex-direction: column;
        padding-bottom: 100px;
    }
}

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    cursor: pointer;
    justify-content: center;
    align-items: center;
}

.lightbox.active {
    display: flex;
}

.lightbox img {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 40px;
    color: white;
    cursor: pointer;
    font-weight: 300;
}

.clickable-img {
    cursor: zoom-in;
    transition: transform 0.2s ease;
}

.clickable-img:hover {
    transform: scale(1.02);
}