@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --bg-color: #f8fafc;
    --text-color: #334155;
    --text-light: #94a3b8;
    --white: #ffffff;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Nav */
.site-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
    gap: 20px;
}

.logo-container {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
}
.logo-container img {
    height: 48px;
    width: auto;
    object-fit: contain;
    display: block;
}

/* Hamburger Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1000;
}
.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--primary);
    margin: 5px 0;
    transition: var(--transition);
    border-radius: 3px;
}

/* Main Menu */
.main-nav {
    display: flex;
    align-items: center;
}
.main-nav ul {
    list-style: none;
    display: flex;
    gap: 6px;
    margin: 0;
    padding: 0;
    align-items: center;
    flex-wrap: nowrap;
}
.main-nav li {
    position: relative;
    display: flex;
    align-items: center;
}
.main-nav a,
.main-nav .nav-link-dropdown {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.92rem;
    padding: 8px 13px;
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    transition: var(--transition);
    cursor: pointer;
    user-select: none;
    line-height: 1;
    height: 38px;
    box-sizing: border-box;
}
.main-nav a:hover,
.main-nav .nav-link-dropdown:hover,
.main-nav .active > a,
.main-nav .active > .nav-link-dropdown {
    background: var(--bg-color);
    color: var(--accent);
}

.dropdown-icon {
    width: 10px;
    height: 10px;
    stroke: currentColor;
    transition: transform 0.2s ease;
    flex-shrink: 0;
    margin-left: 2px;
}
.main-nav li:hover .dropdown-icon,
.main-nav li.open .dropdown-icon {
    transform: rotate(180deg);
}

/* Dropdown */
.main-nav li ul {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    background: var(--white);
    min-width: 220px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: var(--transition);
    z-index: 50;
    flex-direction: column;
    padding: 6px 0;
    align-items: stretch;
}
.main-nav li:hover > ul,
.main-nav li.open > ul {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.main-nav li ul li {
    display: block;
    width: 100%;
}
.main-nav li ul a {
    padding: 10px 18px;
    border-radius: 0;
    font-weight: 400;
    font-size: 0.9rem;
    height: auto;
    display: block;
    line-height: 1.4;
    white-space: nowrap;
}
.main-nav li ul a:hover {
    background: var(--bg-color);
    color: var(--accent);
}

/* Mobile Menu Adjustments */
@media (max-width: 1024px) {
    .menu-toggle { display: block; }
    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        border-top: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        display: none;
        padding: 16px 20px;
        max-height: calc(100vh - 80px);
        overflow-y: auto;
    }
    .main-nav.open { display: block; }
    .main-nav ul {
        flex-direction: column;
        width: 100%;
        align-items: stretch;
        gap: 4px;
    }
    .main-nav li {
        width: 100%;
        display: block;
    }
    .main-nav a,
    .main-nav .nav-link-dropdown {
        width: 100%;
        height: auto;
        padding: 12px 14px;
        justify-content: flex-start;
    }
    .main-nav li.has-dropdown > a,
    .main-nav li.has-dropdown > .nav-link-dropdown {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .main-nav li ul {
        position: static;
        box-shadow: none;
        border: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
        padding: 4px 0 4px 14px;
        min-width: 100%;
        background: transparent;
    }
    .main-nav li.open > ul { display: flex; }
    .menu-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
    .menu-toggle.open span:nth-child(2) { opacity: 0; }
    .menu-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }
}

/* Main Content */
main { flex-grow: 1; padding: 40px 0; }
.content-wrapper { background: var(--white); padding: 40px; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }

/* Responsive Images — prevent any image from overflowing its container */
.content-wrapper img,
.page-content img,
.module-content img,
.footer-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    display: block;
    margin: 1rem auto;
}

/* Grid Modules */
/* Use explicit column counts (not auto-fit) so that grid-column: 1 / -1 works correctly */
.home-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 40px; }

@media (max-width: 1024px) {
    .home-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .home-grid { grid-template-columns: 1fr; gap: 20px; margin-top: 20px; }
}

.module-card {
    padding: 35px; border-radius: var(--radius-lg); background: var(--white);
    box-shadow: var(--shadow-md); border: 1px solid var(--border-color);
    transition: var(--transition); display: flex; flex-direction: column;
    overflow: hidden;
}
.module-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.module-card h2 { margin-top: 0; margin-bottom: 20px; color: var(--primary); font-size: 1.5rem; display: flex; align-items: center; gap: 10px; }
.module-content { color: var(--text-color); font-size: 1.05rem; overflow: hidden; }

/* Full-width Module Card */
.module-card.full-width {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.module-card.full-width .app-module-body {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.module-card.full-width .app-module-info {
    flex: 1 1 450px;
}

.module-card.full-width .app-module-desc {
    font-size: 1.05rem;
    color: var(--text-color);
    margin-bottom: 10px;
    line-height: 1.6;
}

.module-card.full-width .app-downloads {
    display: flex;
    flex-direction: row;
    gap: 16px;
    flex-shrink: 0;
    margin: 0;
}

.module-card.full-width .app-btn {
    min-width: 210px;
}

@media (max-width: 900px) {
    .module-card.full-width .app-module-body {
        flex-direction: column;
        align-items: stretch;
        gap: 20px;
    }
    .module-card.full-width .app-downloads {
        flex-direction: column;
    }
    .module-card.full-width .app-btn {
        width: 100%;
        min-width: 0;
    }
}

@media (max-width: 480px) {
    .module-card { padding: 24px; }
    .module-card h2 { font-size: 1.25rem; }
}
.module-content p { margin-bottom: 1rem; }

/* Carousel */
.carousel-container {
    position: relative;
    width: 100%;
    height: 500px;
    overflow: hidden;
    border-radius: var(--radius-lg);
    margin-bottom: 40px;
    box-shadow: var(--shadow-lg);
}
.carousel { width: 100%; height: 100%; }
.carousel-item {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    z-index: 1;
}
.carousel-item.active { opacity: 1; z-index: 2; }
.carousel-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(15, 23, 42, 0.85) 0%,
        rgba(15, 23, 42, 0.3) 40%,
        rgba(15, 23, 42, 0) 70%
    );
    z-index: 2;
}
.carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* Ken Burns: slow zoom animation on the active slide */
    animation: none;
}
.carousel-item.active img {
    animation: kenBurns 12s ease-in-out forwards;
}

@keyframes kenBurns {
    0%   { transform: scale(1)   translate(0, 0); }
    100% { transform: scale(1.12) translate(-1%, -1%); }
}

.carousel-caption {
    position: absolute;
    bottom: 50px;
    left: 60px;
    right: 60px;
    color: var(--white);
    z-index: 3;
    max-width: 800px;
}
.carousel-caption h3 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 15px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.6);
    line-height: 1.2;
}
.carousel-caption p {
    font-size: 1.2rem;
    text-shadow: 0 1px 4px rgba(0,0,0,0.5);
    opacity: 0.9;
}

/* Indicators */
.carousel-indicators {
    position: absolute;
    bottom: 25px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}
.carousel-indicators .dot {
    width: 35px;
    height: 5px;
    background: rgba(255,255,255,0.4);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
}
.carousel-indicators .dot:hover { background: rgba(255,255,255,0.7); }
.carousel-indicators .dot.active { background: var(--white); width: 50px; }

/* Controls */
.carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--white);
    border: 1px solid rgba(255,255,255,0.15);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}
.carousel-control:hover {
    background: rgba(255,255,255,0.35);
    transform: translateY(-50%) scale(1.1);
}
.carousel-control.prev { left: 20px; }
.carousel-control.next { right: 20px; }

/* ---- Mobile carousel: use aspect-ratio instead of fixed height ---- */
@media (max-width: 768px) {
    .carousel-container {
        height: auto;
        aspect-ratio: 4 / 3;
        border-radius: var(--radius-md);
    }
    .carousel-item img {
        object-position: center 30%;
    }
    .carousel-caption {
        left: 20px;
        right: 20px;
        bottom: 50px;
    }
    .carousel-caption h3 { font-size: 1.5rem; }
    .carousel-caption p { font-size: 0.95rem; }
    .carousel-control {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
    .carousel-control.prev { left: 10px; }
    .carousel-control.next { right: 10px; }
    .carousel-indicators { bottom: 15px; gap: 8px; }
    .carousel-indicators .dot { width: 24px; height: 4px; }
    .carousel-indicators .dot.active { width: 36px; }

    /* Content wrapper tighter on mobile */
    .content-wrapper { padding: 20px; }
    main { padding: 20px 0; }
}

@media (max-width: 480px) {
    .carousel-container {
        aspect-ratio: 3 / 2;
        border-radius: 0;
        margin-left: -20px;
        margin-right: -20px;
        width: calc(100% + 40px);
    }
    .carousel-caption h3 { font-size: 1.25rem; }
    .carousel-caption p { font-size: 0.85rem; }
    .carousel-caption { bottom: 35px; }
    .content-wrapper { padding: 16px; border-radius: var(--radius-md); }
}

/* Footer Modular */
.site-footer { background: var(--primary); color: var(--text-light); padding: 70px 0 30px; margin-top: auto; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 40px; margin-bottom: 50px; }
.footer-col h4 { color: var(--white); font-size: 1.2rem; margin-bottom: 25px; font-weight: 600; position: relative; padding-bottom: 10px; }
.footer-col h4::after { content: ''; position: absolute; left: 0; bottom: 0; width: 40px; height: 2px; background: var(--accent); }
.footer-col .footer-content { line-height: 1.7; }
.footer-col p { margin-bottom: 15px; }
.footer-col ul { list-style: none; padding: 0; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col a { color: var(--text-light); text-decoration: none; transition: var(--transition); }
.footer-col a:hover { color: var(--white); }
.footer-bottom { text-align: center; padding-top: 30px; border-top: 1px solid var(--primary-light); font-size: 0.95rem; }

/* Markdown specific styles in modules */
.footer-content h1, .footer-content h2, .footer-content h3 { display: none; } /* Hide heading if used in module, as footer-col h4 handles title */

/* App Download Buttons (Home modules & Footer) */
.app-downloads {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 18px 0 14px;
}

.module-card .app-btn,
.footer-col .app-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    border-radius: var(--radius-md);
    padding: 12px 18px;
    text-decoration: none;
    transition: var(--transition);
}

.module-card .app-btn {
    background: var(--primary);
    border: 1px solid var(--primary);
    color: var(--white);
}

.module-card .app-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35);
}

.module-card .app-btn-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    color: var(--white);
    transition: var(--transition);
}

.module-card .app-btn:hover .app-btn-icon {
    transform: scale(1.08);
}

.app-btn-content {
    display: flex;
    flex-direction: column;
    line-height: 1.25;
}

.module-card .app-btn-sub {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #94a3b8;
}

.module-card .app-btn:hover .app-btn-sub {
    color: #e0e7ff;
}

.module-card .app-btn-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
}

.app-note {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 12px;
    line-height: 1.45;
}

/* ========================================================
   PDF Download Links — auto-styled via href selector
   ======================================================== */
.page-content a[href$=".pdf"],
.module-content a[href$=".pdf"],
.content-wrapper a[href$=".pdf"],
.sidebar-module a[href$=".pdf"] {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 12px 18px;
    margin: 8px 0;
    background: linear-gradient(135deg, #f0f4ff 0%, #e8eeff 100%);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-md);
    color: var(--primary);
    font-weight: 500;
    font-size: 0.92rem;
    text-decoration: none;
    transition: var(--transition);
    line-height: 1.4;
    width: 100%;
    box-sizing: border-box;
    word-break: break-word;
}

.page-content a[href$=".pdf"]::before,
.module-content a[href$=".pdf"]::before,
.content-wrapper a[href$=".pdf"]::before,
.sidebar-module a[href$=".pdf"]::before {
    content: '';
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    border-radius: 8px;
    /* PDF icon via inline SVG data URI */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z'/%3E%3Cpolyline points='14 2 14 8 20 8'/%3E%3Cline x1='12' y1='18' x2='12' y2='12'/%3E%3Cpolyline points='9 15 12 18 15 15'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 18px;
}

.page-content a[href$=".pdf"]::after,
.module-content a[href$=".pdf"]::after,
.content-wrapper a[href$=".pdf"]::after,
.sidebar-module a[href$=".pdf"]::after {
    content: 'PDF';
    flex-shrink: 0;
    margin-left: auto;
    padding: 3px 8px;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--accent);
    background: rgba(59, 130, 246, 0.1);
    border-radius: 6px;
}

.page-content a[href$=".pdf"]:hover,
.module-content a[href$=".pdf"]:hover,
.content-wrapper a[href$=".pdf"]:hover,
.sidebar-module a[href$=".pdf"]:hover {
    background: linear-gradient(135deg, #e0eaff 0%, #d4e0ff 100%);
    border-color: rgba(59, 130, 246, 0.4);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
    transform: translateY(-2px);
}

@media (max-width: 480px) {
    .page-content a[href$=".pdf"],
    .module-content a[href$=".pdf"],
    .content-wrapper a[href$=".pdf"],
    .sidebar-module a[href$=".pdf"] {
        padding: 10px 14px;
        gap: 8px;
        font-size: 0.85rem;
    }
    .page-content a[href$=".pdf"]::before,
    .module-content a[href$=".pdf"]::before,
    .content-wrapper a[href$=".pdf"]::before,
    .sidebar-module a[href$=".pdf"]::before {
        width: 28px;
        height: 28px;
        background-size: 15px;
    }
}

/* ========================================================
   Sidebar Layout & Sidebar Modules
   ======================================================== */
.layout-with-sidebar {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: nowrap !important;
    gap: 30px !important;
    align-items: flex-start !important;
    width: 100% !important;
    box-sizing: border-box;
}

.layout-with-sidebar .main-column {
    flex: 1 1 calc(100% - 330px) !important;
    width: calc(100% - 330px) !important;
    max-width: calc(100% - 330px) !important;
    min-width: 0 !important;
    box-sizing: border-box;
}

.sidebar-module {
    flex: 0 0 300px !important;
    width: 300px !important;
    max-width: 300px !important;
    background: var(--white);
    padding: 25px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    position: sticky;
    top: 90px;
    box-sizing: border-box;
    font-family: inherit;
}

.sidebar-module h3 {
    margin-top: 0;
    margin-bottom: 20px;
    color: var(--primary);
    font-size: 1.3rem;
    font-weight: 600;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent);
}

.sidebar-content {
    color: var(--text-color);
    font-size: 0.95rem;
    line-height: 1.6;
}

.sidebar-content h3,
.sidebar-content h4 {
    color: var(--primary);
    font-size: 1.05rem;
    font-weight: 600;
    margin-top: 20px;
    margin-bottom: 10px;
}

.sidebar-content ul {
    padding-left: 20px;
    margin-bottom: 15px;
}

.sidebar-content p {
    margin-bottom: 12px;
}

.sidebar-content a:not([href$=".pdf"]) {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.sidebar-content a:not([href$=".pdf"]):hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.sidebar-recent-posts a:hover {
    color: var(--accent) !important;
}

@media (max-width: 850px) {
    .layout-with-sidebar {
        flex-direction: column !important;
    }
    .layout-with-sidebar .main-column {
        width: 100% !important;
        max-width: 100% !important;
    }
    .sidebar-module {
        flex: none !important;
        width: 100% !important;
        max-width: 100% !important;
        position: static !important;
    }
}

/* List spacing in module and page content */
.module-content ul,
.module-content ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}
.module-content li {
  margin-bottom: 0.5rem;
}
.page-content ul,
.page-content ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}
.page-content li {
  margin-bottom: 0.5rem;
}

/* Fix image responsiveness in home-intro section */
.home-intro img {
    max-width: 100%;
    height: auto;
}