/* =========================================
   1. ROOT VARIABLES & GLOBAL STYLES
   ========================================= */
:root {
    --dds-blue: #1E3A5F;
    --dds-blue-light: #2E5C8A;
    --dds-orange: #E04E1F;
    --dds-orange-light: #F15A29;
}

body {
    font-family: 'Inter', sans-serif;
    color: #333;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .navbar-brand {
    font-family: 'Poppins', sans-serif;
}

a { text-decoration: none; }

/* Brand Colors */
.text-brand-blue { color: var(--dds-blue) !important; }
.text-brand-orange { color: var(--dds-orange) !important; }
.bg-brand-blue { background-color: var(--dds-blue) !important; }
.bg-brand-orange { background-color: var(--dds-orange) !important; }

/* Custom Buttons */
.btn-brand-orange { 
    background-color: var(--dds-orange); 
    color: white; 
    border: none; 
    transition: all 0.3s ease;
}
.btn-brand-orange:hover { 
    background-color: var(--dds-orange-light); 
    color: white; 
    transform: translateY(-2px); 
    box-shadow: 0 5px 15px rgba(224, 78, 31, 0.3);
}

.btn-brand-blue { 
    background-color: var(--dds-blue); 
    color: white; 
    border: none; 
    transition: all 0.3s ease;
}
.btn-brand-blue:hover { 
    background-color: var(--dds-blue-light); 
    color: white; 
    transform: translateY(-2px); 
    box-shadow: 0 5px 15px rgba(30, 58, 95, 0.3);
}

/* =========================================
   2. PRELOADER (CSS-Only Auto Hide)
   ========================================= */
.preloader {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: #fff;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: hidePreloader 0.5s ease-out 2s forwards; /* Hides after 2 seconds */
}

@keyframes hidePreloader {
    to {
        opacity: 0;
        visibility: hidden;
    }
}

/* =========================================
   3. TOP BAR & NAVBAR
   ========================================= */
.top-bar {
    font-size: 14px;
}
.top-bar a {
    transition: color 0.3s;
}
.top-bar a:hover {
    color: var(--dds-orange) !important;
}

.navbar {
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.navbar .nav-link {
    position: relative;
    transition: color 0.3s;
    margin: 0 5px;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
    color: var(--dds-orange) !important;
}

/* Animated Underline for Nav Links */
.navbar .nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--dds-orange);
    transition: width 0.3s ease;
}

.navbar .nav-link:hover::after,
.navbar .nav-link.active::after {
    width: 80%;
}

/* =========================================
   4. HERO SECTION & ANIMATIONS
   ========================================= */
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}

.floating-card {
    animation: float 3s ease-in-out infinite;
}

.floating-card-delay {
    animation: float 3s ease-in-out infinite 1.5s;
}

/* =========================================
   5. CARDS & HOVER EFFECTS
   ========================================= */
.feature-box, .course-card, .seminar-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-box:hover, .course-card:hover, .seminar-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1) !important;
}

/* =========================================
   6. PAGE HEADERS (Inner Pages)
   ========================================= */
.page-header {
    background: linear-gradient(135deg, var(--dds-blue), var(--dds-blue-light));
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: -50%; right: -10%;
    width: 400px; height: 400px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

/* =========================================
   7. FOOTER
   ========================================= */
footer {
    background-color: #0f1c2e; /* Darker blue for contrast */
}

footer a {
    transition: color 0.3s;
}

footer a:hover {
    color: var(--dds-orange) !important;
}

/* =========================================
   8. RESPONSIVE FIXES
   ========================================= */
@media (max-width: 991px) {
    .navbar-collapse {
        background: white;
        padding: 20px;
        margin-top: 15px;
        border-radius: 10px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    }
    
    /* Disable underline animation on mobile */
    .navbar .nav-link::after {
        display: none; 
    }
    
    .top-bar {
        font-size: 12px;
    }
}