/* ==================================================================
   MODERN ACADEMIC REPOSITORY NAVIGATION - BASE STYLES
   Inspired by Elsevier's clean, professional design
   ================================================================== */

/* ==================================================================
   CSS RESET & VARIABLES
   ================================================================== */

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

:root {
    /* Primary Color Palette */
    --primary-color: #FF6E1F;
    --primary-dark: #E65100;
    --primary-light: #FF8A50;

    /* Neutral Colors */
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-gray: #f4f4f4;
    --border-color: #e0e0e0;
    --border-light: #f0f0f0;

    /* UI Colors */
    --hover-bg: #f7f7f7;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);

    /* Alert Colors */
    --success: #27ae60;
    --warning: #f39c12;
    --error: #e74c3c;
    --info: #3498db;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --nav-height: 72px;
    --container-max-width: 1280px;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-light);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    font-family: var(--font-primary);
    cursor: pointer;
    border: none;
    background: none;
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

/* ==================================================================
   MODERN NAVIGATION BAR
   ================================================================== */

.modern-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-light);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    overflow: visible;
}

.modern-nav.scrolled {
    box-shadow: var(--shadow-sm);
}

.modern-nav.hidden {
    transform: translateY(-100%);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 32px;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
    overflow: visible;
}

/* ==================================================================
   LOGO SECTION
   ================================================================== */

.nav-logo {
    flex-shrink: 0;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
    transition: opacity var(--transition-fast);
}

.logo-link:hover {
    opacity: 0.8;
}

.logo-image {
    height: 48px;
    width: auto;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-primary {
    font-size: 20px;
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.logo-secondary {
    font-size: 13px;
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    letter-spacing: 0.3px;
}

/* ==================================================================
   DESKTOP NAVIGATION LINKS
   ================================================================== */

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    overflow: visible;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    font-size: 15px;
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    border-radius: 6px;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    white-space: nowrap;
}

.nav-link:hover,
.nav-dropdown.active .nav-link {
    background-color: var(--hover-bg);
    color: var(--primary-color);
}

.dropdown-btn {
    cursor: pointer;
}

.dropdown-icon {
    font-size: 11px;
    transition: transform var(--transition-fast);
}

.nav-dropdown.active .dropdown-icon {
    transform: rotate(180deg);
}

/* ==================================================================
   DROPDOWN MENUS
   ================================================================== */

.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    min-width: 320px;
    background-color: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--transition-fast),
                transform var(--transition-fast),
                visibility var(--transition-fast);
    z-index: 1100;
}

.nav-dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-content {
    padding: 8px;
}

.dropdown-link {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 14px 16px;
    border-radius: 8px;
    transition: background-color var(--transition-fast);
}

.dropdown-link:hover {
    background-color: var(--bg-light);
}

.dropdown-link.highlight {
    background-color: rgba(255, 110, 31, 0.08);
}

.dropdown-link.highlight:hover {
    background-color: rgba(255, 110, 31, 0.12);
}

.dropdown-link i {
    font-size: 20px;
    color: var(--primary-color);
    width: 24px;
    flex-shrink: 0;
    margin-top: 2px;
}

.dropdown-link div {
    flex: 1;
}

.dropdown-link strong {
    display: block;
    font-size: 14px;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: 2px;
}

.dropdown-link span {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.dropdown-separator {
    height: 1px;
    background-color: var(--border-light);
    margin: 8px 12px;
}

/* ==================================================================
   USER SECTION & AUTH BUTTONS
   ================================================================== */

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

/* Search Button */
.nav-search-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-white);
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.nav-search-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background-color: var(--hover-bg);
}

/* User Dropdown */
.user-dropdown {
    position: relative;
}

.user-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px 6px 6px;
    border: 1px solid var(--border-color);
    border-radius: 50px;
    background-color: var(--bg-white);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.user-btn:hover,
.user-dropdown.active .user-btn {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 110, 31, 0.1);
}

.user-avatar,
.user-avatar-large {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    font-size: 14px;
    font-weight: var(--font-weight-semibold);
    flex-shrink: 0;
}

.user-avatar-large {
    width: 48px;
    height: 48px;
    font-size: 18px;
}

.user-name-text {
    font-size: 14px;
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-icon {
    font-size: 11px;
    color: var(--text-secondary);
    transition: transform var(--transition-fast);
}

.user-dropdown.active .user-icon {
    transform: rotate(180deg);
}

.user-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 280px;
    background-color: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--transition-fast),
                transform var(--transition-fast),
                visibility var(--transition-fast);
    overflow: hidden;
}

.user-dropdown.active .user-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-menu-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px;
    background: rgba(255, 110, 31, 0.05);
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-info strong {
    display: block;
    font-size: 15px;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-info small {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-menu-divider {
    height: 1px;
    background-color: var(--border-light);
    margin: 4px 0;
}

.user-menu-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 20px;
    font-size: 14px;
    color: var(--text-primary);
    transition: background-color var(--transition-fast);
}

.user-menu-item:hover {
    background-color: var(--hover-bg);
}

.user-menu-item.logout {
    color: var(--error);
}

.user-menu-item i {
    width: 18px;
    text-align: center;
    font-size: 16px;
    color: var(--text-secondary);
}

.user-menu-item.logout i {
    color: var(--error);
}

/* Auth Buttons */
.btn-secondary,
.btn-primary-new {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: var(--font-weight-semibold);
    border-radius: 8px;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-secondary {
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    background-color: var(--bg-white);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    background-color: rgba(255, 110, 31, 0.05);
    color: var(--primary-color);
}

.btn-primary-new {
    color: white;
    background: var(--primary-color);
    box-shadow: 0 2px 8px rgba(255, 110, 31, 0.25);
}

.btn-primary-new:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 110, 31, 0.35);
}

/* ==================================================================
   MOBILE MENU BUTTON
   ================================================================== */

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 22px;
    padding: 0;
}

.hamburger-line {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.mobile-menu-btn.active .hamburger-line:nth-child(1) {
    transform: translateY(9.5px) rotate(45deg);
}

.mobile-menu-btn.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active .hamburger-line:nth-child(3) {
    transform: translateY(-9.5px) rotate(-45deg);
}

/* ==================================================================
   MOBILE NAVIGATION
   ================================================================== */

.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 400px;
    height: 100vh;
    background-color: var(--bg-white);
    box-shadow: -4px 0 32px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
    transition: right var(--transition-slow);
    z-index: 1001;
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    background-color: var(--bg-white);
    z-index: 10;
}

.mobile-nav-header h3 {
    font-size: 18px;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.mobile-close-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background-color: var(--bg-light);
    color: var(--text-primary);
    transition: background-color var(--transition-fast);
}

.mobile-close-btn:hover {
    background-color: var(--border-color);
}

.mobile-nav-content {
    padding: 16px 24px 32px;
}

.mobile-nav-link {
    display: block;
    padding: 14px 0;
    font-size: 16px;
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-light);
    transition: color var(--transition-fast);
}

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

.mobile-nav-section {
    border-bottom: 1px solid var(--border-light);
}

.mobile-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 14px 0;
    font-size: 16px;
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    text-align: left;
}

.mobile-nav-toggle i {
    font-size: 12px;
    color: var(--text-secondary);
    transition: transform var(--transition-normal);
}

.mobile-nav-section.active .mobile-nav-toggle {
    color: var(--primary-color);
}

.mobile-nav-submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.mobile-submenu-link {
    display: block;
    padding: 12px 0 12px 20px;
    font-size: 15px;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.mobile-submenu-link:hover {
    color: var(--primary-color);
}

.mobile-submenu-link.highlight {
    color: var(--primary-color);
    font-weight: var(--font-weight-medium);
}

.mobile-nav-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-light);
}

.mobile-btn-secondary,
.mobile-btn-primary {
    display: block;
    text-align: center;
    padding: 14px 24px;
    font-size: 15px;
    font-weight: var(--font-weight-semibold);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.mobile-btn-secondary {
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    background-color: var(--bg-white);
}

.mobile-btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.mobile-btn-primary {
    color: white;
    background: var(--primary-color);
    box-shadow: 0 2px 8px rgba(255, 110, 31, 0.25);
}

.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
    z-index: 1000;
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ==================================================================
   MESSAGES & ALERTS
   ================================================================== */

.messages-container {
    padding: 20px 0;
}

.alert {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 20px;
    padding-right: 48px;
    border-radius: 10px;
    margin-bottom: 12px;
    position: relative;
    animation: slideIn 0.3s ease;
}

.alert > i {
    font-size: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}

.alert-success {
    background-color: rgba(39, 174, 96, 0.1);
    color: var(--success);
    border-left: 4px solid var(--success);
}

.alert-error {
    background-color: rgba(231, 76, 60, 0.1);
    color: var(--error);
    border-left: 4px solid var(--error);
}

.alert-warning {
    background-color: rgba(243, 156, 18, 0.1);
    color: var(--warning);
    border-left: 4px solid var(--warning);
}

.alert-info {
    background-color: rgba(52, 152, 219, 0.1);
    color: var(--info);
    border-left: 4px solid var(--info);
}

.alert-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    color: inherit;
    opacity: 0.6;
    transition: opacity var(--transition-fast), background-color var(--transition-fast);
}

.alert-close:hover {
    opacity: 1;
    background-color: rgba(0, 0, 0, 0.05);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}

/* ==================================================================
   MAIN CONTENT
   ================================================================== */

.main-content {
    min-height: calc(100vh - var(--nav-height) - 400px);
    padding: 40px 0;
}

/* ==================================================================
   FOOTER
   ================================================================== */

.footer {
    background-color: #1a1a1a;
    color: rgba(255, 255, 255, 0.85);
    margin-top: 80px;
}

.footer-main {
    padding: 60px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
}

.footer-heading {
    color: white;
    font-size: 18px;
    font-weight: var(--font-weight-semibold);
    margin-bottom: 20px;
}

.footer-text {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: color var(--transition-fast);
}

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

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-contact p {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
}

.footer-contact i {
    color: var(--primary-color);
    margin-top: 3px;
}

.footer-contact a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

.footer-contact a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom-links {
    display: flex;
    gap: 24px;
}

.footer-bottom-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
}

.footer-bottom-links a:hover {
    color: white;
}

.footer-powered-by {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-powered-by p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

.footer-powered-by .powered-by-text {
    color: var(--primary-color);
    font-weight: var(--font-weight-semibold);
}

.footer-powered-by .powered-by-text a {
    color: var(--primary-color);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.footer-powered-by .powered-by-text a:hover {
    opacity: 0.8;
}

/* ==================================================================
   SCROLL TO TOP BUTTON
   ================================================================== */

.scroll-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: 0 4px 16px rgba(255, 110, 31, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 999;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(255, 110, 31, 0.4);
}

/* ==================================================================
   RESPONSIVE DESIGN
   ================================================================== */

/* Tablets and Below */
@media (max-width: 1024px) {
    .nav-container {
        padding: 0 24px;
        gap: 16px;
    }

    .nav-actions {
        gap: 12px;
        margin-left: auto;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
}

/* Mobile Devices */
@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }

    .nav-container {
        padding: 0 16px;
        gap: 8px;
    }

    .logo-image {
        height: 40px;
    }

    .logo-text {
        display: none;
    }

    .logo-primary {
        font-size: 18px;
    }

    .logo-secondary {
        font-size: 12px;
    }

    .nav-actions {
        gap: 8px;
        margin-left: auto;
    }

    .nav-actions .btn-secondary {
        display: none;
    }

    .nav-actions .btn-primary-new {
        display: none;
    }

    .nav-search-btn {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }

    .user-name-text {
        display: none;
    }

    /* Group search and hamburger visually */
    .mobile-menu-btn {
        margin-left: 0;
    }

    .mobile-nav {
        max-width: 100%;
    }

    /* Footer Responsive */
    .footer {
        margin-top: 50px;
    }

    .footer-main {
        padding: 48px 0 32px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-column {
        text-align: left;
    }

    .footer-heading {
        font-size: 16px;
        margin-bottom: 16px;
    }

    .footer-text {
        font-size: 14px;
        margin-bottom: 16px;
    }

    .footer-links li {
        margin-bottom: 10px;
    }

    .footer-links a {
        font-size: 14px;
    }

    .footer-contact p {
        font-size: 14px;
    }

    .footer-bottom {
        padding: 20px 0;
    }

    .footer-bottom-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .footer-bottom-links {
        flex-direction: column;
        gap: 12px;
    }

    .footer-powered-by {
        margin-top: 16px;
        padding-top: 16px;
    }

    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }

    /* Main Content Padding */
    .main-content {
        padding: 24px 0;
    }

    /* Container Adjustments */
    .container {
        padding: 0 16px;
    }
}

/* Small Mobile Devices */
@media (max-width: 480px) {
    :root {
        --nav-height: 56px;
    }

    .nav-container {
        padding: 0 12px;
        gap: 6px;
    }

    .nav-actions {
        gap: 6px;
    }

    .nav-search-btn {
        width: 34px;
        height: 34px;
        font-size: 13px;
    }

    .logo-image {
        height: 36px;
    }

    .logo-primary {
        font-size: 16px;
    }

    .logo-secondary {
        font-size: 11px;
    }

    .container {
        padding: 0 12px;
    }

    /* Footer for Small Mobile */
    .footer {
        margin-top: 40px;
    }

    .footer-main {
        padding: 40px 0 24px;
    }

    .footer-grid {
        gap: 28px;
    }

    .footer-heading {
        font-size: 15px;
        margin-bottom: 14px;
    }

    .footer-text {
        font-size: 13px;
        line-height: 1.7;
    }

    .footer-links li {
        margin-bottom: 8px;
    }

    .footer-links a {
        font-size: 13px;
    }

    .footer-contact p {
        font-size: 13px;
    }

    .footer-contact i {
        font-size: 13px;
    }

    .footer-bottom {
        padding: 16px 0;
    }

    .copyright {
        font-size: 13px;
    }

    .footer-bottom-links a {
        font-size: 13px;
    }

    .footer-powered-by {
        margin-top: 14px;
        padding-top: 14px;
    }

    .footer-powered-by p {
        font-size: 13px;
    }

    /* Main Content */
    .main-content {
        padding: 20px 0;
    }

    /* Mobile Nav */
    .mobile-nav {
        max-width: 100%;
    }

    .mobile-nav-header {
        padding: 16px 20px;
    }

    .mobile-nav-header h3 {
        font-size: 16px;
    }

    .mobile-nav-content {
        padding: 12px 20px 24px;
    }

    .mobile-nav-link,
    .mobile-nav-toggle {
        font-size: 15px;
        padding: 12px 0;
    }

    .mobile-submenu-link {
        font-size: 14px;
        padding: 10px 0 10px 16px;
    }

    .mobile-btn-secondary,
    .mobile-btn-primary {
        padding: 12px 20px;
        font-size: 14px;
    }

    /* Scroll to Top */
    .scroll-to-top {
        bottom: 16px;
        right: 16px;
        width: 40px;
        height: 40px;
        font-size: 16px;
    }

    /* User Menu on Mobile */
    .user-menu {
        width: calc(100vw - 32px);
        right: -8px;
    }

    .user-menu-header {
        padding: 16px;
    }

    .user-menu-item {
        padding: 10px 16px;
        font-size: 14px;
    }

    /* Alerts */
    .alert {
        padding: 14px 16px;
        padding-right: 44px;
        font-size: 14px;
    }

    .messages-container {
        padding: 16px 0;
    }
}

/* Extra Small Mobile Devices */
@media (max-width: 375px) {
    .logo-image {
        height: 32px;
    }

    .logo-primary {
        font-size: 15px;
    }

    .logo-secondary {
        font-size: 10px;
    }

    .nav-search-btn {
        width: 32px;
        height: 32px;
        font-size: 12px;
    }

    .user-avatar {
        width: 32px;
        height: 32px;
        font-size: 12px;
    }

    .container {
        padding: 0 12px;
    }

    .footer-heading {
        font-size: 14px;
    }

    .footer-text,
    .footer-links a,
    .footer-contact p {
        font-size: 12px;
    }

    .copyright,
    .footer-bottom-links a,
    .footer-powered-by p {
        font-size: 12px;
    }
}

/* ==================================================================
   FULL-SCREEN SEARCH OVERLAY
   ================================================================== */

.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
    overflow-y: auto;
}

.search-overlay.active {
    opacity: 1;
    visibility: visible;
}

.search-overlay-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.search-overlay-header {
    display: flex;
    justify-content: flex-end;
    padding: 16px 0;
}

.search-close-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 20px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-close-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: rotate(90deg);
}

.search-overlay-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 40px 0;
}

.search-input-wrapper {
    position: relative;
    margin-bottom: 32px;
}

.search-input-icon {
    position: absolute;
    left: 24px;
    top: 50%;
    transform: translateY(-50%);
    color: rgba(255, 255, 255, 0.6);
    font-size: 20px;
    pointer-events: none;
    z-index: 1;
}

.search-overlay-input {
    width: 100%;
    padding: 24px 24px 24px 64px;
    font-size: 24px;
    font-weight: var(--font-weight-medium);
    color: white;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    outline: none;
    transition: all var(--transition-fast);
}

.search-overlay-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.search-overlay-input:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(255, 110, 31, 0.2);
}

.search-tips {
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

.search-tips kbd {
    display: inline-block;
    padding: 4px 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    font-size: 12px;
    font-family: monospace;
    margin: 0 2px;
}

.search-suggestions {
    margin-top: 16px;
    max-height: 400px;
    overflow-y: auto;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 16px;
    display: none;
}

.search-suggestions.active {
    display: block;
}

.search-suggestion-item {
    padding: 12px 16px;
    color: rgba(255, 255, 255, 0.9);
    cursor: pointer;
    border-radius: 8px;
    transition: background var(--transition-fast);
    margin-bottom: 4px;
}

.search-suggestion-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.search-suggestion-item:last-child {
    margin-bottom: 0;
}

/* Responsive Search Overlay */
@media (max-width: 768px) {
    .search-overlay-container {
        padding: 16px;
    }

    .search-overlay-content {
        padding: 20px 0;
    }

    .search-overlay-input {
        font-size: 18px;
        padding: 20px 20px 20px 56px;
    }

    .search-input-icon {
        left: 20px;
        font-size: 18px;
    }

    .search-close-btn {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .search-overlay-input {
        font-size: 16px;
        padding: 16px 16px 16px 48px;
    }

    .search-input-icon {
        left: 16px;
        font-size: 16px;
    }
}