/* ============================================
   PROTTI - MODERN PROFESSIONAL NAVBAR
   Clean, Corporate, Premium Design
   ============================================ */

/* CSS Variables */
:root {
    --nav-primary: #e53935;
    --nav-primary-dark: #c62828;
    --nav-primary-light: #ffcdd2;
    --nav-dark: #1a1a2e;
    --nav-text: #2d3748;
    --nav-text-light: #718096;
    --nav-white: #ffffff;
    --nav-gray-50: #f7fafc;
    --nav-gray-100: #edf2f7;
    --nav-gray-200: #e2e8f0;
    --nav-gray-600: #4a5568;
    --nav-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --nav-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --nav-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   TOP HEADER BAR
   ============================================ */
.top-header {
    background: var(--nav-white);
    border-bottom: 1px solid var(--nav-gray-100);
    padding: 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1001;
    transition: var(--nav-transition);
}

.top-header.hidden {
    transform: translateY(-100%);
}

.top-header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.4rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-header-info {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.top-header-info a {
    color: var(--nav-gray-600);
    font-size: 0.8rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: var(--nav-transition);
}

.top-header-info a:hover {
    color: var(--nav-primary);
}

.top-header-info i {
    color: var(--nav-primary);
    font-size: 0.85rem;
}

.top-social {
    display: flex;
    gap: 0.3rem;
}

.top-social a {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    color: var(--nav-gray-600);
    font-size: 0.85rem;
    transition: var(--nav-transition);
    position: relative;
    overflow: hidden;
}

.top-social a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--nav-primary);
    transform: translateY(100%);
    transition: var(--nav-transition);
    z-index: 0;
}

.top-social a i,
.top-social a svg {
    position: relative;
    z-index: 1;
}

.top-social a:hover {
    color: var(--nav-white);
    transform: translateY(-1px);
}

.top-social a:hover::before {
    transform: translateY(0);
}

/* Social Brand Colors */
.top-social a[aria-label="Facebook"]:hover::before { background: #1877F2; }
.top-social a[aria-label="LinkedIn"]:hover::before { background: #0A66C2; }
.top-social a[aria-label="Twitter"]:hover::before { background: #1DA1F2; }
.top-social a[aria-label="YouTube"]:hover::before { background: #FF0000; }
.top-social a[aria-label="Instagram"]:hover::before {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
}

/* ============================================
   MAIN HEADER
   ============================================ */
.header {
    background: var(--nav-white);
    box-shadow: var(--nav-shadow);
    position: fixed;
    width: 100%;
    top: 38px;
    z-index: 1000;
    transition: var(--nav-transition);
}

.header.scrolled {
    top: 0;
    box-shadow: var(--nav-shadow-lg);
}

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

/* Navigation Container */
.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 80px;
    padding: 0.5rem 0;
}

/* ============================================
   LOGO
   ============================================ */
.logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo a {
    display: flex;
    align-items: center;
    transition: var(--nav-transition);
}

.logo a:hover {
    transform: scale(1.02);
}

.logo img {
    height: 55px !important;
    width: auto !important;
    max-height: none !important;
    object-fit: contain;
    transition: var(--nav-transition);
}

/* ============================================
   NAVIGATION LINKS
   ============================================ */
.nav-links {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    align-items: center;
}

.nav-links > li {
    position: relative;
}

.nav-links > li > a {
    display: block;
    text-decoration: none;
    color: var(--nav-text);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.6rem 1.1rem;
    border-radius: 8px;
    transition: var(--nav-transition);
    position: relative;
    letter-spacing: 0.4px;
    text-transform: uppercase;
}

.nav-links > li > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--nav-primary);
    transition: var(--nav-transition);
    transform: translateX(-50%);
    border-radius: 2px;
}

.nav-links > li > a:hover {
    color: var(--nav-primary);
    background: rgba(229, 57, 53, 0.05);
}

.nav-links > li > a:hover::after,
.nav-links > li > a.active::after {
    width: 60%;
}

.nav-links > li > a.active {
    color: var(--nav-primary);
    font-weight: 600;
}

/* Dropdown Arrow */
.nav-links > li.has-dropdown > a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links > li.has-dropdown > a .dropdown-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border: 1.5px solid var(--nav-gray-200);
    border-radius: 50%;
    transition: var(--nav-transition);
    font-size: 0.7rem;
    color: var(--nav-text-light);
    background: transparent;
}

.nav-links > li.has-dropdown > a .dropdown-arrow i {
    transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    margin-top: 1px;
}

.nav-links > li.has-dropdown:hover > a .dropdown-arrow {
    border-color: var(--nav-primary);
    background: var(--nav-primary);
    color: var(--nav-white);
    box-shadow: 0 2px 8px rgba(229, 57, 53, 0.3);
}

.nav-links > li.has-dropdown:hover > a .dropdown-arrow i {
    transform: rotate(180deg);
}

.nav-links > li.has-dropdown > a.active .dropdown-arrow {
    border-color: var(--nav-primary);
    color: var(--nav-primary);
    background: rgba(229, 57, 53, 0.08);
}

.nav-links > li.has-dropdown:hover > a .dropdown-arrow {
    transform: rotate(180deg);
}

/* ============================================
   DROPDOWN MENU
   ============================================ */
.dropdown {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background: var(--nav-white);
    min-width: 260px;
    box-shadow: var(--nav-shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--nav-transition);
    border-radius: 12px;
    border: 1px solid var(--nav-gray-100);
    z-index: 1001;
    overflow: hidden;
}

.dropdown::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 12px;
    height: 12px;
    background: var(--nav-white);
    border-left: 1px solid var(--nav-gray-100);
    border-top: 1px solid var(--nav-gray-100);
}

.nav-links > li:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown ul {
    list-style: none;
    padding: 0.5rem;
    margin: 0;
}

.dropdown li {
    border-bottom: 1px solid var(--nav-gray-100);
}

.dropdown li:last-child {
    border-bottom: none;
}

.dropdown a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
    color: var(--nav-text);
    text-decoration: none;
    transition: var(--nav-transition);
    font-weight: 400;
    font-size: 0.9rem;
    border-radius: 8px;
}

.dropdown-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--nav-primary-light);
    color: var(--nav-primary);
    border-radius: 8px;
    font-size: 0.85rem;
    transition: var(--nav-transition);
    flex-shrink: 0;
}

.dropdown a:hover {
    background: var(--nav-gray-50);
    color: var(--nav-primary);
}

.dropdown a:hover .dropdown-icon {
    background: var(--nav-primary);
    color: var(--nav-white);
    transform: scale(1.05);
}

.dropdown a.active {
    color: var(--nav-primary);
    font-weight: 600;
}

.dropdown a.active .dropdown-icon {
    background: var(--nav-primary);
    color: var(--nav-white);
}

/* Dropdown Animation Stagger */
.dropdown li {
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
}

.nav-links > li:hover .dropdown li {
    opacity: 1;
    transform: translateX(0);
}

.nav-links > li:hover .dropdown li:nth-child(1) { transition-delay: 0.05s; }
.nav-links > li:hover .dropdown li:nth-child(2) { transition-delay: 0.1s; }
.nav-links > li:hover .dropdown li:nth-child(3) { transition-delay: 0.15s; }
.nav-links > li:hover .dropdown li:nth-child(4) { transition-delay: 0.2s; }
.nav-links > li:hover .dropdown li:nth-child(5) { transition-delay: 0.25s; }
.nav-links > li:hover .dropdown li:nth-child(6) { transition-delay: 0.3s; }

/* ============================================
   DONATE BUTTON
   ============================================ */
.donate-btn {
    background: linear-gradient(135deg, var(--nav-primary) 0%, var(--nav-primary-dark) 100%);
    color: var(--nav-white);
    border: none;
    padding: 0.75rem 1.75rem;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--nav-transition);
    margin-left: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px rgba(229, 57, 53, 0.35);
    position: relative;
    overflow: hidden;
}

.donate-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--nav-transition);
}

.donate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(229, 57, 53, 0.45);
}

.donate-btn:hover::before {
    left: 100%;
}

.donate-btn i {
    font-size: 0.9rem;
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* ============================================
   MOBILE MENU TOGGLE
   ============================================ */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    width: 44px;
    height: 44px;
    cursor: pointer;
    color: var(--nav-text);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    padding: 8px;
    border-radius: 8px;
    transition: var(--nav-transition);
}

.menu-toggle:hover {
    background: var(--nav-gray-100);
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--nav-text);
    border-radius: 2px;
    transition: var(--nav-transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============================================
   MOBILE MENU
   ============================================ */
.nav-mobile {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--nav-white);
    box-shadow: var(--nav-shadow-lg);
    flex-direction: column;
    padding: 1rem;
    z-index: 1000;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
}

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

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

.nav-links-mobile > li {
    position: relative;
    border-bottom: 1px solid var(--nav-gray-100);
}

.nav-links-mobile > li:last-child {
    border-bottom: none;
}

.nav-links-mobile > li > a {
    display: block;
    text-decoration: none;
    color: var(--nav-text);
    font-weight: 500;
    padding: 1rem 0.5rem;
    transition: var(--nav-transition);
}

.nav-links-mobile > li > a:hover,
.nav-links-mobile > li > a.active {
    color: var(--nav-primary);
}

/* Mobile Dropdown Toggle */
.dropdown-toggle {
    position: absolute;
    right: 0.5rem;
    top: 0.75rem;
    background: var(--nav-gray-100);
    border: none;
    color: var(--nav-text);
    width: 32px;
    height: 32px;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--nav-transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.dropdown-toggle:hover {
    background: var(--nav-gray-200);
}

.dropdown-toggle.active {
    background: var(--nav-primary);
    color: var(--nav-white);
    transform: rotate(45deg);
}

.dropdown-mobile {
    display: none;
    background: var(--nav-gray-50);
    border-radius: 8px;
    margin: 0 0.5rem 0.5rem;
    overflow: hidden;
}

.dropdown-mobile.active {
    display: block;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-mobile a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
    color: var(--nav-text);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--nav-transition);
    border-bottom: 1px solid var(--nav-gray-200);
}

.dropdown-mobile a:last-child {
    border-bottom: none;
}

.dropdown-mobile a:hover,
.dropdown-mobile a.active {
    color: var(--nav-primary);
    background: var(--nav-white);
}

.dropdown-mobile .dropdown-icon {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
}

.donate-btn-mobile {
    background: linear-gradient(135deg, var(--nav-primary) 0%, var(--nav-primary-dark) 100%);
    color: var(--nav-white);
    border: none;
    padding: 1rem;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--nav-transition);
    margin-top: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px rgba(229, 57, 53, 0.35);
}

.donate-btn-mobile:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(229, 57, 53, 0.45);
}

.donate-btn-mobile i {
    animation: heartbeat 1.5s ease-in-out infinite;
}

/* ============================================
   RESPONSIVE STYLES
   ============================================ */
@media (max-width: 991px) {
    .top-header-content {
        justify-content: center;
    }
    
    .top-header-info {
        display: none;
    }
    
    .nav {
        min-height: 70px;
    }
    
    .logo img {
        height: 45px !important;
    }
    
    .nav-links {
        display: none;
    }
    
    .donate-btn {
        display: none;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .header {
        top: 34px;
    }
    
    .header.scrolled {
        top: 0;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .nav {
        min-height: 65px;
    }
    
    .logo img {
        height: 40px !important;
    }
    
    .top-social a {
        width: 28px;
        height: 28px;
        font-size: 0.85rem;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
.nav-links > li > a:focus-visible,
.dropdown a:focus-visible,
.donate-btn:focus-visible,
.menu-toggle:focus-visible,
.top-social a:focus-visible {
    outline: 2px solid var(--nav-primary);
    outline-offset: 2px;
}