@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* Reset and Base Styles */
html {
    overflow-y: scroll;
    scrollbar-gutter: stable;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-base);
    color: var(--text-color);
    line-height: 1.5;
    transition: background-color 0.2s, color 0.2s;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

/* Base Layout Containers & Universal Responsive Bounds */
.container {
    width: 100% !important;
    max-width: 1200px !important;
    margin-left: auto !important;
    margin-right: auto !important;
    padding: 0 16px !important;
    box-sizing: border-box !important;
}

.layout-grid,
.landing-main-wrapper,
.portal-slider-wrapper,
.popular-slider-outer {
    min-width: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
}

/* Header - Simple and Clean */
header {
    background-color: var(--bg-nav);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    height: 65px;
    display: flex;
    align-items: center;
}

header .navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
    list-style: none;
}

.nav-links a {
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--text-muted);
    padding: 6px 0;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* 3-Column PC Layout Grid System */
.layout-grid {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr) 280px;
    gap: 24px;
    align-items: start;
    margin-top: 10px;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
}

.layout-grid.hide-left {
    grid-template-columns: minmax(0, 1fr) 280px;
}

.layout-grid.hide-right {
    grid-template-columns: 240px minmax(0, 1fr);
}

.layout-grid.hide-both {
    grid-template-columns: minmax(0, 1fr) !important;
}

.left-sidebar-area, .right-sidebar-area {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

@media (max-width: 1200px) {
    .layout-grid,
    .layout-grid.hide-left,
    .layout-grid.hide-right,
    .layout-grid.hide-both {
        grid-template-columns: minmax(0, 1fr) !important;
        gap: 20px !important;
    }
    .left-sidebar-area,
    .right-sidebar-area {
        display: none !important;
    }
}

/* Main Content Wrapper */
main.container {
    flex: 1;
    padding: 16px 16px 40px 16px !important; /* Perfectly aligned with header container bounds */
}

/* Footer */
footer {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 40px 0 24px;
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-top: auto;
}

footer .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 30px;
}

footer h4 {
    color: var(--text-color);
    margin-bottom: 16px;
    font-size: 0.95rem;
    font-weight: 700;
}

footer ul {
    list-style: none;
}

footer ul li {
    margin-bottom: 8px;
}

footer ul li a:hover {
    color: var(--primary-color);
}

.footer-copy {
    text-align: center;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    font-size: 0.82rem;
}

/* Theme Switcher Button */
.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.theme-toggle:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Ad slots wrapper & details */
.ad-slot-wrapper {
    margin: 16px auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.ad-label {
    font-size: 0.68rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
}

.ad-box {
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    border-radius: var(--radius-sm);
    padding: 8px;
    display: inline-block;
    box-shadow: var(--card-shadow);
    max-width: 100%;
    overflow: hidden;
}

.ad-box img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
}

/* Tab filter trigger */
.tab-trigger {
    background: none;
    border: none;
    padding: 10px 14px;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--radius-sm);
}

.tab-trigger.active {
    background-color: var(--primary-color);
    color: var(--text-on-primary) !important;
}

.tab-trigger:hover:not(.active) {
    color: var(--text-color);
    background-color: var(--border-color);
}

/* Consonant Filters */
.consonant-filter button {
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 0.8rem;
    transition: var(--transition);
}

.consonant-filter button.active {
    background-color: var(--primary-color) !important;
    color: var(--text-on-primary) !important;
    border-color: var(--primary-color) !important;
}



/* Header Dropdown Menus */
.nav-item-dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    box-shadow: var(--card-shadow);
    list-style: none;
    min-width: 180px;
    z-index: 200;
    padding: 6px 0;
    margin-top: 6px;
}

.dropdown-menu li {
    width: 100%;
    margin: 0 !important;
    padding: 0 !important;
}

.dropdown-menu li a {
    display: block;
    padding: 10px 16px;
    font-size: 0.88rem;
    color: var(--text-color) !important;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
}

.dropdown-menu li a:hover {
    background-color: var(--primary-light);
    color: var(--primary-color) !important;
}

.nav-item-dropdown:hover .dropdown-menu {
    display: block;
}

/* Custom Header Buttons & Icons from Mockup */
.btn-login-header {
    display: inline-block;
    padding: 8px 22px;
    font-size: 0.88rem;
    font-weight: 700;
    color: #1e293b;
    background-color: #ffffff;
    border: 1.5px solid #cbd5e1;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.2s;
    line-height: 1.4;
}
.btn-login-header:hover {
    background-color: #f8fafc;
    border-color: #94a3b8;
}
.btn-signup-header {
    display: inline-block;
    padding: 8px 22px;
    font-size: 0.88rem;
    font-weight: 700;
    color: #ffffff;
    background-color: #2563eb;
    border: 1.5px solid #2563eb;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.2s;
    line-height: 1.4;
}
.btn-signup-header:hover {
    background-color: #1d4ed8;
    border-color: #1d4ed8;
}
.header-icon-btn {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    text-decoration: none;
    color: #475569;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    transition: all 0.2s;
    box-sizing: border-box;
}
.header-icon-btn:hover {
    background-color: var(--bg-base);
    color: var(--primary-color) !important;
}

/* Mobile Hamburger Toggle & Drawer Navigation */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #334155;
    cursor: pointer;
    padding: 6px;
}

.mobile-menu-drawer {
    display: block;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--bg-card);
    border-bottom: 1.5px solid var(--border-color);
    box-shadow: 0 15px 30px rgba(12, 74, 96, 0.12);
    z-index: 9999;
    padding: 24px;
    box-sizing: border-box;
    transform: translateY(-15px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s ease;
}

.mobile-menu-drawer.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav-links {
    list-style: none;
    padding: 0;
    margin: 0 0 24px 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mobile-nav-links li {
    width: 100%;
}

.mobile-nav-links a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--text-color);
    background-color: var(--bg-base);
    border: 1px solid var(--border-color);
    text-decoration: none;
    transition: all 0.2s ease;
}

.mobile-nav-links a::after {
    content: "→";
    font-size: 1.1rem;
    color: var(--primary-color);
    transition: transform 0.2s ease;
}

.mobile-nav-links a:active {
    background-color: var(--primary-light);
    border-color: var(--primary-color);
    transform: scale(0.98);
}

.mobile-nav-links a:active::after {
    transform: translateX(4px);
}

.mobile-auth-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 8px;
}

.mobile-auth-buttons a {
    display: flex !important;
    align-items: center;
    justify-content: center;
    padding: 14px 16px !important;
    border-radius: 12px !important;
    font-weight: 700 !important;
    font-size: 0.95rem !important;
    text-decoration: none !important;
    transition: all 0.2s ease !important;
    box-sizing: border-box !important;
    text-align: center !important;
    line-height: 1 !important;
    margin: 0 !important;
}

.mobile-auth-buttons .btn-login-header {
    background-color: var(--bg-base) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-color) !important;
}

.mobile-auth-buttons .btn-signup-header {
    background: linear-gradient(135deg, var(--accent-coral), #f97316) !important;
    border: none !important;
    color: #ffffff !important;
    box-shadow: 0 4px 12px rgba(239, 108, 51, 0.2) !important;
}

.mobile-auth-buttons a:active {
    transform: scale(0.97) !important;
}

@media (max-width: 1200px) {
    .nav-links {
        display: none !important;
    }
    .mobile-menu-toggle {
        display: flex !important;
        align-items: center;
        justify-content: center;
    }
    .nav-actions .btn-login-header, .nav-actions .btn-signup-header {
        display: none !important;
    }
}

/* ━━━━━━━━━━━━━━━━━━━━━━━ Global Mobile Viewport Bounds ━━━━━━━━━━━━━━━━━━━━━━━ */
html, body {
    max-width: 100% !important;
    overflow-x: hidden !important;
}

@media (max-width: 768px) {
    .container, main.container, .layout-grid, .landing-main-wrapper {
        min-width: 0 !important;
        max-width: 100% !important;
        overflow-x: hidden !important;
        box-sizing: border-box !important;
    }
    .container {
        padding: 10px !important;
    }
}

*, *::before, *::after {
    box-sizing: border-box;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━ Comprehensive Dark Mode Overrides ━━━━━━━━━━━━━━━━━━━━━━━ */
[data-theme="dark"] {
    background-color: var(--bg-base) !important;
    color: var(--text-color) !important;
}

[data-theme="dark"] header {
    background-color: var(--bg-card) !important;
    border-bottom-color: var(--border-color) !important;
}

[data-theme="dark"] .mobile-menu-drawer {
    background-color: var(--bg-card) !important;
    border-bottom-color: var(--border-color) !important;
}

[data-theme="dark"] .mobile-nav-links a {
    color: var(--text-color) !important;
}

[data-theme="dark"] .nav-links a,
[data-theme="dark"] .header-icon-btn,
[data-theme="dark"] .logo {
    color: var(--text-color) !important;
}

[data-theme="dark"] .btn-login-header {
    background-color: var(--bg-card) !important;
    color: var(--text-color) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .quick-menu-card,
[data-theme="dark"] .category-tabs-container,
[data-theme="dark"] .portal-exam-card,
[data-theme="dark"] .slider-card-item,
[data-theme="dark"] .card {
    background-color: var(--bg-card) !important;
    border-color: var(--border-color) !important;
    color: var(--text-color) !important;
}

[data-theme="dark"] .quick-menu-card h4,
[data-theme="dark"] .quick-menu-card p,
[data-theme="dark"] .portal-tab-title,
[data-theme="dark"] .portal-card-title,
[data-theme="dark"] .hero-left-column h1,
[data-theme="dark"] .hero-left-column p {
    color: var(--text-color) !important;
}

[data-theme="dark"] .portal-tab {
    background-color: var(--bg-base) !important;
    border-color: var(--border-color) !important;
    color: var(--text-color) !important;
}

[data-theme="dark"] .portal-tab-sub {
    color: var(--text-muted) !important;
}

[data-theme="dark"] .portal-tab.active {
    background-color: var(--primary-color) !important;
    color: #ffffff !important;
}

[data-theme="dark"] .portal-tab.active .portal-tab-title,
[data-theme="dark"] .portal-tab.active .portal-tab-sub {
    color: #ffffff !important;
}

[data-theme="dark"] #portal-instant-search,
[data-theme="dark"] .portal-tab-filters-right select,
[data-theme="dark"] .hero-search-container input,
[data-theme="dark"] .hero-search-container select {
    background-color: var(--bg-base) !important;
    border-color: var(--border-color) !important;
    color: var(--text-color) !important;
}

[data-theme="dark"] .btn-slider-nav {
    background-color: var(--bg-card) !important;
    border-color: var(--border-color) !important;
    color: var(--text-color) !important;
}

[data-theme="dark"] select,
[data-theme="dark"] select option,
[data-theme="dark"] input:not([type="submit"]):not([type="button"]):not([type="checkbox"]):not([type="radio"]),
[data-theme="dark"] textarea {
    background-color: var(--bg-card) !important;
    border-color: var(--border-color) !important;
    color: var(--text-color) !important;
}


/* Summernote WYSIWYG Editor Dark Mode Overrides */
[data-theme="dark"] .note-editor {
    background-color: var(--bg-card) !important;
    border-color: var(--border-color) !important;
    color: var(--text-color) !important;
}
[data-theme="dark"] .note-toolbar {
    background-color: var(--bg-base) !important;
    border-bottom-color: var(--border-color) !important;
}
[data-theme="dark"] .note-btn {
    background-color: var(--bg-card) !important;
    border-color: var(--border-color) !important;
    color: var(--text-color) !important;
}
[data-theme="dark"] .note-btn:hover {
    background-color: var(--primary-light) !important;
    color: var(--primary-color) !important;
}
[data-theme="dark"] .note-dropdown-menu {
    background-color: var(--bg-card) !important;
    border-color: var(--border-color) !important;
}
[data-theme="dark"] .note-dropdown-item {
    color: var(--text-color) !important;
}
[data-theme="dark"] .note-dropdown-item:hover {
    background-color: var(--primary-light) !important;
}
[data-theme="dark"] .note-modal-content {
    background-color: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
    box-shadow: var(--card-shadow) !important;
}
[data-theme="dark"] .note-modal-header {
    border-bottom: 1px solid var(--border-color) !important;
    background-color: var(--bg-card) !important;
    color: var(--text-color) !important;
}
[data-theme="dark"] .note-modal-header .close {
    color: var(--text-color) !important;
    opacity: 0.7;
}
[data-theme="dark"] .note-modal-body {
    background-color: var(--bg-card) !important;
    color: var(--text-color) !important;
}
[data-theme="dark"] .note-modal-footer {
    border-top: 1px solid var(--border-color) !important;
    background-color: var(--bg-card) !important;
}
[data-theme="dark"] .note-modal-title {
    color: var(--text-color) !important;
}
[data-theme="dark"] .note-form-label {
    color: var(--text-color) !important;
}
[data-theme="dark"] .note-modal .note-input {
    background-color: var(--bg-base) !important;
    color: var(--text-color) !important;
    border: 1px solid var(--border-color) !important;
}
[data-theme="dark"] .note-modal .btn {
    border-radius: var(--radius-sm);
    font-weight: 700;
}
[data-theme="dark"] .note-modal .btn-primary {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: #ffffff !important;
}

/* MyPage Tab Bar (Scrollable on Mobile) */
.mypage-tab-bar {
    display: flex;
    gap: 24px;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 24px;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    white-space: nowrap;
}
.mypage-tab-bar::-webkit-scrollbar {
    display: none;
}
.mypage-tab-bar a {
    font-size: 0.92rem;
    font-weight: 700;
    padding: 8px 4px 14px 4px;
    color: var(--text-muted) !important;
    text-decoration: none;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    transition: color 0.15s ease, border-color 0.15s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}
.mypage-tab-bar a:hover {
    color: var(--text-color) !important;
}
.mypage-tab-bar a.active {
    color: var(--primary-color) !important;
    border-bottom-color: var(--primary-color);
}

@media (max-width: 640px) {
    .mypage-tab-bar {
        gap: 16px;
        margin-bottom: 16px;
        padding-right: 16px;
        -webkit-overflow-scrolling: touch;
    }
    .mypage-tab-bar a {
        font-size: 0.85rem;
        padding: 6px 2px 10px 2px;
    }
}