/* ==========================================================================
   Huddling Books CSS Design System
   ========================================================================== */

:root {
    /* Brand Color Palette */
    --color-primary-gray: #575756;
    --color-secondary-yellow: #fbbb20;
    --color-accent-mint: #5cb3b1;
    --color-accent-mint-dark: #459a98;
    
    /* Neutral Colors */
    --color-bg-light: #f7f9f9;
    --color-bg-white: #ffffff;
    --color-text-dark: #2c2c2c;
    --color-text-medium: #626262;
    --color-text-light: #8e8e8e;
    --color-border-light: rgba(87, 87, 86, 0.1);
    
    /* Layout & Shadows */
    --font-primary: 'Noto Sans KR', sans-serif;
    --font-heading: 'Outfit', 'Montserrat', sans-serif;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    
    --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 8px 30px rgba(87, 87, 86, 0.08);
    --shadow-premium: 0 20px 40px rgba(87, 87, 86, 0.15);
    
    /* Glassmorphism Standard */
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-blur: blur(12px);
}

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

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-light);
    color: var(--color-text-dark);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

button, input, select, textarea {
    font-family: inherit;
}

ul {
    list-style: none;
}

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

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg-light);
}
::-webkit-scrollbar-thumb {
    background: var(--color-text-light);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-gray);
}

/* Common UI Elements / Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 2rem;
    font-weight: 500;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.95rem;
    border: none;
    outline: none;
}

.btn-primary {
    background-color: var(--color-accent-mint);
    color: var(--color-bg-white);
    box-shadow: 0 4px 15px rgba(92, 179, 177, 0.3);
}

.btn-primary:hover {
    background-color: var(--color-accent-mint-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(92, 179, 177, 0.5);
}

.btn-secondary {
    background-color: var(--color-bg-white);
    color: var(--color-primary-gray);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-subtle);
}

.btn-secondary:hover {
    background-color: var(--color-bg-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-sm {
    padding: 0.5rem 1.2rem;
    font-size: 0.85rem;
}

/* Glassmorphism Card Style */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-medium);
    padding: 2.5rem;
    transition: all 0.3s ease;
}

.glass-card:hover {
    box-shadow: var(--shadow-premium);
}

/* Section Common Layouts */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 1.5rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--color-accent-mint);
    margin-bottom: 0.8rem;
}

.section-tag.light {
    color: var(--color-secondary-yellow);
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-primary-gray);
    letter-spacing: -0.5px;
}

.section-desc {
    color: var(--color-text-medium);
    margin-top: 1rem;
    font-size: 1.05rem;
}

.title-underline {
    width: 60px;
    height: 3px;
    background-color: var(--color-secondary-yellow);
    margin: 1rem auto 0;
    border-radius: 2px;
}

.title-underline.left {
    margin: 1rem 0 0 0;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.4s ease;
    padding: 1rem 0;
}

.main-header.scrolled {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(87, 87, 86, 0.08);
    box-shadow: var(--shadow-subtle);
    padding: 0.6rem 0;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-area {
    display: flex;
    align-items: center;
}

.huddling-logo {
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.main-header.scrolled .huddling-logo {
    width: 65px;
    height: 65px;
}

.logo-titles {
    display: none; /* Removed as we use the integrated CI.png logo */
}

.main-nav ul {
    display: flex;
    gap: 2.5rem;
}

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--color-primary-gray);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-secondary-yellow);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--color-accent-mint-dark);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-primary-gray);
    cursor: pointer;
}

/* ==========================================================================
   Hero Visual Section
   ========================================================================== */
.hero-section {
    height: 100vh;
    min-height: 700px;
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    z-index: 1;
    transform: scale(1.03);
    animation: zoomBackground 15s infinite alternate ease-in-out;
}

@keyframes zoomBackground {
    0% { transform: scale(1); }
    100% { transform: scale(1.05); }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 650px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 3rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-premium);
    border: 1px solid rgba(255, 255, 255, 0.4);
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-accent-mint-dark);
    letter-spacing: 4px;
    text-transform: uppercase;
    display: block;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: 2.6rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-primary-gray);
    margin-bottom: 1.5rem;
    letter-spacing: -0.5px;
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--color-text-medium);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 2.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-bg-white);
    font-size: 0.75rem;
    letter-spacing: 2px;
    z-index: 2;
    text-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

.scroll-indicator i {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-8px); }
    60% { transform: translateY(-4px); }
}

/* ==========================================================================
   About Us Section
   ========================================================================== */
.about-section {
    background-color: var(--color-bg-white);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
    margin-bottom: 5rem;
}

.about-card {
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.about-card-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: rgba(92, 179, 177, 0.15);
    color: var(--color-accent-mint-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
}

.about-card h3 {
    font-size: 1.35rem;
    color: var(--color-primary-gray);
    font-weight: 700;
}

.about-card p {
    color: var(--color-text-medium);
    font-size: 0.95rem;
}

.highlight-text {
    font-weight: 500;
    color: var(--color-accent-mint-dark) !important;
    border-left: 3px solid var(--color-secondary-yellow);
    padding-left: 0.8rem;
}

/* CEO/People Layout */
.people-container {
    background: linear-gradient(135deg, rgba(92, 179, 177, 0.05) 0%, rgba(251, 187, 32, 0.03) 100%);
    border-radius: var(--border-radius-lg);
    padding: 3.5rem;
    border: 1px solid var(--color-border-light);
}

.people-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 3.5rem;
    align-items: center;
}

.people-img-area {
    display: flex;
    justify-content: center;
}

.ceo-avatar {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: #eef2f3;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 6rem;
    color: var(--color-text-light);
    border: 5px solid var(--color-bg-white);
    box-shadow: var(--shadow-medium);
}

.people-tag {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-accent-mint-dark);
    text-transform: uppercase;
    letter-spacing: 1px;
    display: block;
    margin-bottom: 0.5rem;
}

.ceo-name {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary-gray);
    margin-bottom: 1rem;
}

.ceo-intro {
    color: var(--color-text-medium);
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.ceo-timeline {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.timeline-item {
    display: flex;
    gap: 1.5rem;
    position: relative;
}

.timeline-item::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 15px;
    bottom: -20px;
    width: 1px;
    background-color: var(--color-border-light);
}

.timeline-item:last-child::after {
    display: none;
}

.timeline-dot {
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background-color: var(--color-secondary-yellow);
    margin-top: 5px;
    z-index: 1;
}

.timeline-content h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text-dark);
}

.timeline-content p {
    font-size: 0.85rem;
    color: var(--color-text-medium);
}

/* ==========================================================================
   Books Catalog Section
   ========================================================================== */
.books-section {
    background-color: var(--color-bg-light);
}

.filter-wrapper {
    overflow-x: auto;
    margin-bottom: 3rem;
    padding-bottom: 0.5rem;
    -scrollbar-width: none; /* Firefox */
}

.filter-wrapper::-webkit-scrollbar {
    display: none; /* Chrome/Safari */
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: 0.6rem;
    min-width: max-content;
    margin: 0 auto;
    padding: 0 1rem;
}

.filter-btn {
    background-color: var(--color-bg-white);
    color: var(--color-text-medium);
    border: 1px solid var(--color-border-light);
    padding: 0.6rem 1.2rem;
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--color-primary-gray);
    color: var(--color-bg-white);
    border-color: var(--color-primary-gray);
    transform: translateY(-1px);
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    min-height: 300px;
}

.loading-spinner {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    color: var(--color-text-light);
    font-size: 1.1rem;
    padding: 5rem 0;
}

/* Book Card Design */
.book-card {
    background-color: var(--color-bg-white);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-subtle);
    border: 1px solid var(--color-border-light);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    cursor: pointer;
    position: relative;
    opacity: 0;
    transform: translateY(20px);
    animation: cardEntrance 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes cardEntrance {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.book-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-premium);
    border-color: rgba(92, 179, 177, 0.25);
}

.book-img-wrapper {
    position: relative;
    aspect-ratio: 3/4;
    overflow: hidden;
    background-color: #f1f3f4;
}

.book-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.book-card:hover .book-img-wrapper img {
    transform: scale(1.05);
}

.book-tag {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background-color: rgba(87, 87, 86, 0.85);
    color: var(--color-bg-white);
    padding: 0.3rem 0.8rem;
    font-size: 0.7rem;
    font-weight: 500;
    border-radius: 12px;
    backdrop-filter: blur(5px);
    letter-spacing: 0.5px;
}

.book-info {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    gap: 0.5rem;
}

.book-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-primary-gray);
    line-height: 1.4;
    /* Limit Title to 2 Lines */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 2.8rem;
}

.book-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-top: auto;
    border-top: 1px solid var(--color-border-light);
    padding-top: 0.8rem;
}

.book-author {
    font-weight: 500;
    color: var(--color-text-medium);
}

/* ==========================================================================
   Book Detail Modal
   ========================================================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    padding: 1.5rem;
}

.modal.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(87, 87, 86, 0.6);
    backdrop-filter: blur(5px);
}

.modal-content-wrapper {
    position: relative;
    background-color: var(--color-bg-white);
    border-radius: var(--border-radius-lg);
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-premium);
    z-index: 2;
    transform: scale(0.9);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal.active .modal-content-wrapper {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-light);
    cursor: pointer;
    z-index: 10;
    transition: color 0.3s ease;
}

.modal-close:hover {
    color: var(--color-primary-gray);
}

.modal-body {
    padding: 3rem;
}

/* Modal Detailed Layout */
.book-detail-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 3rem;
}

.book-detail-img {
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    aspect-ratio: 3/4;
    background-color: #f1f3f4;
}

.book-detail-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-detail-content {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.detail-category {
    align-self: flex-start;
    background-color: rgba(92, 179, 177, 0.15);
    color: var(--color-accent-mint-dark);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
}

.detail-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary-gray);
    line-height: 1.3;
}

.detail-meta-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-bottom: 1.2rem;
    border-bottom: 1px solid var(--color-border-light);
}

.detail-meta-item {
    font-size: 0.9rem;
    color: var(--color-text-medium);
}

.detail-meta-item strong {
    color: var(--color-primary-gray);
    margin-right: 0.5rem;
}

.detail-summary {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--color-accent-mint-dark);
    line-height: 1.5;
}

.detail-desc {
    color: var(--color-text-medium);
    font-size: 0.95rem;
    line-height: 1.7;
    white-space: pre-line; /* preserves paragraph breaks */
}

/* ==========================================================================
   Manuscript Submission Section
   ========================================================================== */
.submission-section {
    position: relative;
    background-color: var(--color-primary-gray);
    color: var(--color-bg-white);
    background-image: linear-gradient(135deg, #575756 0%, #3e3e3d 100%);
    overflow: hidden;
}

.submission-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.05;
    background-image: radial-gradient(var(--color-secondary-yellow) 1px, transparent 1px);
    background-size: 24px 24px;
}

.submission-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    position: relative;
    z-index: 2;
}

.submission-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1.5rem;
}

.submission-info h2 {
    font-size: 2.2rem;
    line-height: 1.3;
    font-weight: 700;
}

.submission-info p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
}

.guide-box {
    background-color: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--border-radius-md);
    padding: 1.8rem;
    margin-top: 1rem;
}

.guide-box h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-secondary-yellow);
    margin-bottom: 1rem;
}

.guide-box ul {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.guide-box li {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
}

.guide-box li a {
    color: var(--color-secondary-yellow);
    font-weight: 700;
}

/* Submission Form styling inside card */
.submission-form-container {
    color: var(--color-text-dark);
}

.submission-form-container h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-primary-gray);
    margin-bottom: 2rem;
    text-align: center;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.2rem;
}

.form-group-checkbox {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-primary-gray);
}

.required {
    color: #e06c75;
}

.form-group input, .form-group select, .form-group textarea {
    padding: 0.75rem 1rem;
    border: 1px solid rgba(87, 87, 86, 0.2);
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    background-color: var(--color-bg-white);
    outline: none;
    transition: all 0.3s ease;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--color-accent-mint);
    box-shadow: 0 0 0 3px rgba(92, 179, 177, 0.15);
}

.form-group-checkbox input {
    width: 16px;
    height: 16px;
    accent-color: var(--color-accent-mint);
}

.form-group-checkbox label {
    font-size: 0.85rem;
    color: var(--color-text-medium);
}

/* Error message handling */
.error-msg {
    display: none;
    font-size: 0.75rem;
    color: #e06c75;
    margin-top: 0.2rem;
}

.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea {
    border-color: #e06c75;
    background-color: rgba(224, 108, 117, 0.03);
}

.form-group.has-error .error-msg,
.form-group-checkbox.has-error .error-msg {
    display: block;
}

.form-group-checkbox.has-error .agree-error {
    position: absolute;
    bottom: -1.2rem;
    left: 0;
}

/* Loading buttons */
.btn-loading {
    display: none;
}

.btn.loading .btn-text {
    display: none;
}

.btn.loading .btn-loading {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* ==========================================================================
   Contact Details Block
   ========================================================================== */
.contact-section {
    background-color: var(--color-bg-white);
}

.contact-details-grid {
    display: grid;
    grid-template-columns: 5fr 6fr;
    gap: 5rem;
    align-items: center;
}

.contact-info-block h2 {
    font-size: 2.2rem;
    color: var(--color-primary-gray);
    line-height: 1.3;
    font-weight: 700;
}

.contact-items {
    margin-top: 3rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.icon-circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: rgba(251, 187, 32, 0.1);
    color: var(--color-secondary-yellow);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all 0.3s ease;
}

.contact-item:hover .icon-circle {
    background-color: var(--color-secondary-yellow);
    color: var(--color-bg-white);
    transform: scale(1.1);
}

.text-area {
    display: flex;
    flex-direction: column;
}

.text-area span {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-text-light);
    text-transform: uppercase;
}

.text-area a, .text-area p {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--color-primary-gray);
    margin-top: 0.2rem;
}

.text-area a:hover {
    color: var(--color-accent-mint);
}

/* Map Graphic Placeholder */
.contact-map-block {
    text-align: center;
}

.contact-map-block h3 {
    font-size: 1.3rem;
    color: var(--color-primary-gray);
    font-weight: 700;
    margin-top: 1rem;
}

.map-desc {
    color: var(--color-text-medium);
    font-size: 0.9rem;
    margin: 0.5rem 0 1.5rem 0;
}

.map-graphic {
    background-color: #eef2f3;
    height: 250px;
    border-radius: var(--border-radius-md);
    margin-bottom: 2rem;
    position: relative;
    border: 1px solid var(--color-border-light);
    overflow: hidden;
    /* Map background patterns mimicking city grid */
    background-image: 
        radial-gradient(rgba(87, 87, 86, 0.05) 15%, transparent 15%),
        linear-gradient(rgba(255,255,255,0.7) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.7) 1px, transparent 1px);
    background-size: 30px 30px, 40px 40px, 40px 40px;
}

.station-mark {
    position: absolute;
    top: 50px;
    left: 60px;
    background: #ffffff;
    border: 1px solid var(--color-border-light);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    box-shadow: var(--shadow-subtle);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.station-mark .badge {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: #8c4296; /* Line 5 Purple */
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
}

.road-path {
    position: absolute;
    width: 250px;
    height: 10px;
    background-color: rgba(255,255,255,0.9);
    border-radius: 5px;
    top: 110px;
    left: 80px;
    transform: rotate(20deg);
}

.destination-mark {
    position: absolute;
    top: 140px;
    left: 240px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.destination-mark i {
    font-size: 2.2rem;
    color: var(--color-accent-mint-dark);
    z-index: 2;
    filter: drop-shadow(0 2px 5px rgba(0,0,0,0.1));
}

.dest-label {
    background-color: var(--color-primary-gray);
    color: var(--color-bg-white);
    padding: 0.3rem 0.7rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-top: 0.5rem;
    white-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.pulse-ring {
    position: absolute;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(92, 179, 177, 0.4);
    animation: pulse 1.8s infinite ease-out;
    top: -5px;
}

@keyframes pulse {
    0% { transform: scale(0.5); opacity: 0.8; }
    100% { transform: scale(1.8); opacity: 0; }
}

/* ==========================================================================
   Alert Modal Styling (For Contact Submission Success)
   ========================================================================== */
.alert-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    padding: 1.5rem;
}

.alert-modal.active {
    opacity: 1;
    pointer-events: auto;
}

.alert-modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(87, 87, 86, 0.5);
    backdrop-filter: blur(3px);
}

.alert-modal-box {
    position: relative;
    z-index: 2;
    max-width: 480px;
    width: 100%;
    text-align: center;
    padding: 3rem 2.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
    transform: translateY(30px);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.alert-modal.active .alert-modal-box {
    transform: translateY(0);
}

.alert-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.alert-icon.success {
    background-color: rgba(92, 179, 177, 0.15);
    color: var(--color-accent-mint-dark);
}

.alert-modal-box h3 {
    font-size: 1.4rem;
    color: var(--color-primary-gray);
    font-weight: 700;
}

.alert-modal-box p {
    color: var(--color-text-medium);
    font-size: 0.95rem;
    line-height: 1.6;
}

.sub-alert {
    font-size: 0.85rem !important;
    color: var(--color-text-light) !important;
}

/* ==========================================================================
   Footer Styling
   ========================================================================== */
.main-footer {
    background-color: var(--color-primary-gray);
    color: rgba(255, 255, 255, 0.7);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 1.5rem 2rem 1.5rem;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    margin-bottom: 2rem;
}

.footer-brand {
    max-width: 450px;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-bg-white);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.brand-slogan {
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-links h4 {
    color: var(--color-bg-white);
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 1.2rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.footer-links a {
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--color-secondary-yellow);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    font-size: 0.8rem;
}

.footer-bottom-info {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.footer-bottom-info span {
    white-space: nowrap;
    word-break: keep-all;
}

/* ==========================================================================
   Responsive Media Queries (Mobile & Tablet Optimization)
   ========================================================================== */
@media (max-width: 1024px) {
    .books-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .submission-layout {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .contact-details-grid {
        grid-template-columns: 1fr;
        gap: 3.5rem;
    }
}

@media (max-width: 768px) {
    /* Header toggle integration */
    .nav-toggle {
        display: block;
    }
    
    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-bg-white);
        box-shadow: var(--shadow-medium);
        padding: 1.5rem;
        display: none;
        border-bottom: 1px solid var(--color-border-light);
    }
    
    .main-nav.active {
        display: block;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 1.2rem;
        align-items: center;
    }
    
    /* Hero section font sizing */
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-content {
        padding: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    /* Layouts to 1 Column */
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .people-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .books-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Modal resizing */
    .book-detail-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .book-detail-img {
        max-width: 200px;
        margin: 0 auto;
    }
    
    .modal-body {
        padding: 2rem;
    }
    
    .footer-top {
        flex-direction: column;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .books-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
}