/* ========================================
   NAVBAR STYLES - Professional LMS Theme
   ======================================== */

/* CSS Variables for consistent theming */
:root {
    /* Primary Colors - Professional Finance/Accounting Theme */
    --primary-navy: #1a2332;
    --primary-gold: #d4af37;
    --accent-teal: #2c5f5d;
    --accent-burgundy: #72242c;
    
    /* Neutral Colors */
    --white: #ffffff;
    --off-white: #f8f9fa;
    --light-gray: #e8ebed;
    --medium-gray: #6c757d;
    --dark-gray: #343a40;
    
    /* Typography */
    --font-display: 'Playfair Display', serif;
    --font-body: 'Work Sans', sans-serif;
    
    /* Spacing */
    --navbar-height: 80px;
    --navbar-height-mobile: 70px;
    
    /* Transitions */
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s ease;
}

/* ========================================
   BASE STYLES
   ======================================== */

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

body {
    font-family: var(--font-body);
    color: var(--dark-gray);
    background-color: var(--off-white);
}

/* ========================================
   NAVBAR CONTAINER
   ======================================== */

.navbar {
    background: linear-gradient(135deg, var(--primary-navy) 0%, #243447 100%);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 0;
    min-height: var(--navbar-height);
    transition: var(--transition-base);
    position: relative;
    z-index: 1000;
}

.navbar::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-gold) 0%, var(--accent-teal) 50%, var(--primary-gold) 100%);
    opacity: 0.8;
}

.navbar .container-fluid {
    padding: 0 2rem;
}

/* ========================================
   LOGO STYLES
   ======================================== */

.navbar-brand {
    padding: 1rem 0;
    margin-right: 2rem;
    transition: var(--transition-fast);
}

.navbar-brand:hover {
    transform: translateY(-2px);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 45px;
    height: 45px;
    color: var(--primary-gold);
    transition: var(--transition-fast);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.navbar-brand:hover .logo-icon {
    color: #f0c851;
    transform: rotate(-5deg);
}

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

.logo-main {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: 0.5px;
}

.logo-sub {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--primary-gold);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-top: 2px;
}

/* ========================================
   NAVBAR LINKS
   ======================================== */

.navbar-nav {
    gap: 0.5rem;
}

.nav-link {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85) !important;
    padding: 0.75rem 1.25rem !important;
    position: relative;
    transition: var(--transition-fast);
    letter-spacing: 0.3px;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80%;
    height: 2px;
    background: var(--primary-gold);
    transition: transform 0.3s ease;
}

.nav-link:hover {
    color: var(--white) !important;
}

.nav-link:hover::before {
    transform: translateX(-50%) scaleX(1);
}

.nav-link.active {
    color: var(--white) !important;
}

.nav-link.active::before {
    transform: translateX(-50%) scaleX(1);
}

/* ========================================
   DROPDOWN STYLES
   ======================================== */

.nav-item.dropdown {
    position: relative;
}

.dropdown-toggle::after {
    margin-left: 0.5rem;
    transition: transform 0.3s ease;
}

.nav-item.dropdown.show .dropdown-toggle::after,
.nav-item.dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

.dropdown-menu {
    background: var(--white);
    border: none;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: 0.75rem 0;
    min-width: 280px;
    margin-top: 0.5rem;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
    position: absolute;
    z-index: 1050;
}

/* Show dropdown on hover (desktop) and click */
.nav-item.dropdown.show .dropdown-menu,
.nav-item.dropdown:hover .dropdown-menu {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    display: block;
}

.dropdown-item {
    display: flex;
    align-items: center;
    padding: 0.875rem 1.5rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--dark-gray);
    transition: var(--transition-fast);
    border-left: 3px solid transparent;
}

.dropdown-item:hover {
    background: linear-gradient(90deg, rgba(212, 175, 55, 0.08) 0%, transparent 100%);
    color: var(--primary-navy);
    border-left-color: var(--primary-gold);
    padding-left: 1.75rem;
}

.dropdown-item i {
    color: var(--accent-teal);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.dropdown-item:hover i {
    color: var(--primary-gold);
}

.dropdown-item-title {
    font-weight: 600;
    color: var(--primary-navy);
    margin-bottom: 2px;
}

.dropdown-item-desc {
    font-size: 0.8rem;
    color: var(--medium-gray);
}

.dropdown-divider {
    margin: 0.5rem 0;
    border-color: var(--light-gray);
    opacity: 0.5;
}

/* ========================================
   LOGIN BUTTON
   ======================================== */

.btn-login {
    background: var(--primary-gold);
    color: var(--primary-navy) !important;
    border-radius: 6px;
    font-weight: 600;
    padding: 0.65rem 1.5rem !important;
    transition: var(--transition-fast);
    border: 2px solid transparent;
}

.btn-login::before {
    display: none;
}

.btn-login:hover {
    background: transparent;
    color: var(--primary-gold) !important;
    border-color: var(--primary-gold);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(212, 175, 55, 0.3);
}

/* ========================================
   MOBILE TOGGLE BUTTON
   ======================================== */

.navbar-toggler {
    border: 2px solid var(--primary-gold);
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    transition: var(--transition-fast);
}

.navbar-toggler:hover {
    background: rgba(212, 175, 55, 0.1);
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 0.2rem rgba(212, 175, 55, 0.25);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(212, 175, 55, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2.5' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ========================================
   RESPONSIVE STYLES
   ======================================== */

/* Tablet */
@media (max-width: 991.98px) {
    .navbar {
        min-height: var(--navbar-height-mobile);
    }
    
    .navbar .container-fluid {
        padding: 0 1rem;
    }
    
    .logo-main {
        font-size: 1.3rem;
    }
    
    .logo-sub {
        font-size: 0.7rem;
    }
    
    .logo-icon {
        width: 40px;
        height: 40px;
    }
    
    .navbar-collapse {
        background: var(--primary-navy);
        margin: 1rem -1rem 0;
        padding: 1rem;
        border-radius: 8px;
        box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.2);
    }
    
    .navbar-nav {
        gap: 0;
    }
    
    .nav-link {
        padding: 0.875rem 1rem !important;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-link::before {
        display: none;
    }
    
    /* Mobile dropdown behavior */
    .dropdown-menu {
        background: rgba(255, 255, 255, 0.05);
        box-shadow: none;
        border-radius: 0;
        margin: 0;
        padding: 0;
        position: static !important;
        transform: none !important;
        min-width: 100%;
    }
    
    .nav-item.dropdown .dropdown-menu {
        display: none;
        opacity: 1;
        pointer-events: auto;
    }
    
    .nav-item.dropdown.show .dropdown-menu {
        display: block;
    }
    
    .dropdown-item {
        color: rgba(255, 255, 255, 0.85);
        padding: 0.75rem 1.5rem;
        border-left: 2px solid transparent;
    }
    
    .dropdown-item:hover {
        background: rgba(212, 175, 55, 0.15);
        color: var(--white);
    }
    
    .dropdown-item-title {
        color: var(--white);
    }
    
    .dropdown-item-desc {
        color: rgba(255, 255, 255, 0.6);
    }
    
    .dropdown-item i {
        color: var(--primary-gold);
    }
    
    .btn-login {
        margin-top: 1rem;
        text-align: center;
        justify-content: center;
    }
}

/* Mobile */
@media (max-width: 575.98px) {
    .navbar .container-fluid {
        padding: 0 0.75rem;
    }
    
    .logo-container {
        gap: 0.75rem;
    }
    
    .logo-icon {
        width: 35px;
        height: 35px;
    }
    
    .logo-main {
        font-size: 1.15rem;
    }
    
    .logo-sub {
        font-size: 0.65rem;
        letter-spacing: 1px;
    }
    
    .navbar-brand {
        margin-right: 0;
    }
}

/* ========================================
   DEMO CONTENT STYLES
   ======================================== */

.demo-content {
    min-height: calc(100vh - var(--navbar-height));
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.demo-content h1 {
    font-family: var(--font-display);
    color: var(--primary-navy);
    margin-bottom: 1.5rem;
}

.demo-content ul {
    list-style: none;
    padding: 0;
}

.demo-content li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.demo-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-teal);
    font-weight: bold;
}

/* ========================================
   ACCESSIBILITY ENHANCEMENTS
   ======================================== */

.nav-link:focus,
.dropdown-item:focus,
.btn-login:focus {
    outline: 2px solid var(--primary-gold);
    outline-offset: 2px;
}

/* Keyboard navigation support */
.nav-item.dropdown:focus-within .dropdown-menu {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    display: block;
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
    .navbar {
        box-shadow: none;
        background: var(--white);
        color: var(--dark-gray);
    }
}