/* In-Cores Website - Design System */
/* Light, Fresh, Modern Aesthetic inspired by monday.com */

/* ============================================
   IMPORTS & FONTS
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700;900&display=swap');

/* ============================================
   CSS VARIABLES - DESIGN TOKENS
   ============================================ */
:root {
    /* Colors - Vibrant & Fresh Palette */
    --primary-blue: #0073EA;
    --primary-blue-light: #4A9EFF;
    --primary-blue-dark: #0060C0;
    --accent-orange: #FF6B35;
    --accent-purple: #7F5AF0;
    --accent-green: #2EC4B6;
    --accent-pink: #FF006E;

    /* Neutrals */
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #0073EA 0%, #4A9EFF 100%);
    --gradient-accent: linear-gradient(135deg, #FF6B35 0%, #FF006E 100%);
    --gradient-purple: linear-gradient(135deg, #7F5AF0 0%, #4A9EFF 100%);
    --gradient-hero: linear-gradient(135deg, #0073EA 0%, #2EC4B6 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Typography */
    --font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.header-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    height: 40px;
    transition: transform var(--transition-base);
}

.logo:hover {
    transform: scale(1.05);
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    font-weight: 500;
    color: var(--gray-700);
    transition: color var(--transition-base);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

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

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

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--gray-700);
    cursor: pointer;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--primary-blue);
    color: var(--white);
}

.btn-accent {
    background: var(--gradient-accent);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    background: var(--gradient-hero);
    color: var(--white);
    padding: var(--spacing-3xl) var(--spacing-lg);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>');
    opacity: 0.3;
}

.hero-container {
    max-width: 1280px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    font-weight: 300;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.section-alt {
    background: var(--gray-50);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: var(--font-size-xl);
    color: var(--gray-600);
    font-weight: 300;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    height: 100%;
}

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

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    color: var(--white);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.card-text {
    color: var(--gray-600);
    line-height: 1.7;
}

/* ============================================
   GRID LAYOUTS
   ============================================ */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ============================================
   VIDEO SECTION (Max 500px width)
   ============================================ */
.video-grid {
    display: grid;
    gap: var(--spacing-2xl);
}

.video-item {
    display: grid;
    grid-template-columns: 500px 1fr;
    gap: var(--spacing-xl);
    align-items: start;
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.video-item:hover {
    box-shadow: var(--shadow-lg);
}

.video-container {
    position: relative;
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.video-container iframe,
.video-container video {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    display: block;
}

.video-content {
    flex: 1;
}

.video-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.video-description {
    color: var(--gray-600);
    line-height: 1.7;
    font-size: var(--font-size-base);
}

/* ============================================
   STATISTICS
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-2xl) 0;
}

.stat-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: var(--font-size-5xl);
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.stat-description {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
}

/* ============================================
   TESTIMONIALS
   ============================================ */
.testimonial {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary-blue);
}

.testimonial-text {
    font-size: var(--font-size-lg);
    font-style: italic;
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.testimonial-author {
    font-weight: 700;
    color: var(--gray-900);
}

.testimonial-role {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
}

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

.footer-section h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--gray-300);
    transition: color var(--transition-base);
}

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

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: var(--gray-400);
}

.footer-partner {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--primary-blue-light);
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {

    /* Typography adjustments */
    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

    /* Navigation */
    .mobile-menu-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        display: flex;
    }

    /* Video layout - stack vertically on mobile */
    .video-item {
        grid-template-columns: 1fr;
    }

    .video-container {
        max-width: 100%;
    }

    /* Spacing adjustments */
    .section {
        padding: var(--spacing-2xl) var(--spacing-md);
    }

    .hero {
        padding: var(--spacing-2xl) var(--spacing-md);
    }

    /* Grid adjustments */
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center {
    text-align: center;
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

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

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

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

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

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

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

/* ============================================
   CONTACT MODAL
   ============================================ */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: var(--z-modal);
    animation: fadeIn var(--transition-base);
}

.modal-overlay.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal-container {
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: fadeInUp var(--transition-slow);
    position: relative;
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-900);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-3xl);
    color: var(--gray-400);
    cursor: pointer;
    transition: color var(--transition-base);
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--gray-700);
}

.modal-body {
    padding: var(--spacing-xl);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: var(--font-size-sm);
}

.form-label.required::after {
    content: ' *';
    color: var(--accent-pink);
}

.form-input,
.form-textarea {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--gray-900);
    transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 115, 234, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--gray-400);
}

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

.form-error {
    display: none;
    color: var(--accent-pink);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

.form-group.error .form-input,
.form-group.error .form-textarea {
    border-color: var(--accent-pink);
}

.form-group.error .form-error {
    display: block;
}

.modal-footer {
    padding: var(--spacing-xl);
    border-top: 1px solid var(--gray-200);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

.btn-cancel {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-cancel:hover {
    background: var(--gray-200);
}

.header-logos {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.planisy-logo {
    height: 32px;
    transition: transform var(--transition-base);
}

.planisy-logo:hover {
    transform: scale(1.05);
}

.logo-divider {
    width: 1px;
    height: 30px;
    background: var(--gray-300);
}

@media (max-width: 640px) {
    .modal-container {
        margin: var(--spacing-md);
        max-height: calc(100vh - 2rem);
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--spacing-md);
    }

    .modal-title {
        font-size: var(--font-size-xl);
    }

    .modal-footer {
        flex-direction: column;
    }

    .modal-footer .btn {
        width: 100%;
    }
}

/* ============================================
   NOTICE BOARD
   ============================================ */
.notice-container {
    max-width: 1000px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.notice-header {
    display: flex;
    background: var(--gray-50);
    padding: var(--spacing-md);
    border-bottom: 2px solid var(--gray-200);
    font-weight: 700;
    color: var(--gray-700);
}

.notice-header-item {
    text-align: center;
}

.notice-header-item.num {
    width: 80px;
}

.notice-header-item.title {
    flex: 1;
    text-align: left;
    padding-left: var(--spacing-md);
}

.notice-header-item.date {
    width: 120px;
}

.notice-item {
    display: flex;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-100);
    align-items: center;
    transition: background-color var(--transition-fast);
}

.notice-item:last-child {
    border-bottom: none;
}

.notice-item:hover {
    background-color: var(--gray-50);
}

.notice-num {
    width: 80px;
    text-align: center;
    color: var(--gray-500);
    font-size: var(--font-size-sm);
}

.notice-title {
    flex: 1;
    padding-left: var(--spacing-md);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.notice-title a {
    color: var(--gray-800);
}

.notice-title a:hover {
    color: var(--primary-blue);
    text-decoration: underline;
}

.notice-badge {
    display: inline-block;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1;
}

.notice-badge.new {
    background-color: var(--accent-orange);
    color: var(--white);
}

.notice-date {
    width: 120px;
    text-align: center;
    color: var(--gray-500);
    font-size: var(--font-size-sm);
}

.pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

.page-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-300);
    background: var(--white);
    color: var(--gray-600);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.page-btn:hover:not(.disabled) {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
}

.page-btn.active {
    background: var(--primary-blue);
    color: var(--white);
    border-color: var(--primary-blue);
}

.page-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--gray-50);
}

@media (max-width: 640px) {
    .notice-header {
        display: none;
    }

    .notice-item {
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-md);
        gap: var(--spacing-xs);
    }

    .notice-num {
        display: none;
    }

    .notice-title {
        padding: 0;
        width: 100%;
    }

    .notice-date {
        width: 100%;
        text-align: left;
        font-size: var(--font-size-xs);
    }
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-sm);
}

.notice-empty {
    padding: var(--spacing-2xl);
    text-align: center;
    color: var(--gray-500);
}

/* Access Control */
.admin-only {
    display: none !important;
}

body.is-admin .admin-only {
    display: inline-flex !important;
}

/* Specific override for flex containers if needed, but !important above usually handles it */
body.is-admin .notice-actions .admin-only {
    display: inline-flex !important;
}