:root {
    --primary-color: #8BC34A;
    --primary-dark: #689F38;
    --primary-light: #DCEDC8;
    --secondary-color: #33691E;
    --accent-color: #FFC107;
    --text-dark: #2E7D32;
    --text-light: #558B2F;
    --background-light: #F1F8E9;
    --background-yellow-green: #F9FBE7;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--background-yellow-green), var(--primary-light));
    background-attachment: fixed;
    line-height: 1.6;
    color: var(--text-dark);
}

/* Header Styles */
.header-main {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    border-bottom: 3px solid var(--accent-color);
}

.logo {
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    border: 3px solid white;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

/* Navigation */
.navbar-main {
    background: linear-gradient(135deg, var(--secondary-color), var(--text-dark)) !important;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-nav .nav-link {
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    margin: 0 2px;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Gradient Background */
.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    position: relative;
    overflow: hidden;
}

.bg-gradient-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.1)" points="0,1000 1000,0 1000,1000"/></svg>');
    background-size: cover;
}

/* Hero Section */
.hero-section {
    position: relative;
    overflow: hidden;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.hero-icon {
    opacity: 0.9;
    animation: float 3s ease-in-out infinite;
    color: var(--accent-color);
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

/* Card Styles */
.card {
    border: none;
    border-radius: 15px;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
}

.card-header {
    border-radius: 15px 15px 0 0 !important;
    font-weight: 600;
}

.karya-card {
    border-top: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.karya-card:hover {
    border-top-color: var(--accent-color);
}

/* Section Titles */
.section-title {
    color: var(--secondary-color);
    font-weight: 700;
    position: relative;
    padding-bottom: 15px;
    text-align: center;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

/* Stats Section */
.stats-section {
    background: linear-gradient(135deg, rgba(139, 195, 74, 0.1), rgba(255, 193, 7, 0.1)) !important;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(139, 195, 74, 0.2);
}

.stats-section h4 {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    padding: 0.75rem 1.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 4px 15px rgba(139, 195, 74, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(139, 195, 74, 0.4);
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* Badges */
.badge {
    font-weight: 600;
    padding: 0.6em 1em;
    border-radius: 20px;
}

.badge.bg-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
}

/* File Icons */
.file-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* Announcements */
.announcement-item {
    border-left: 4px solid var(--accent-color);
    padding-left: 1rem;
    background: var(--background-light);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.announcement-item h6 {
    color: var(--secondary-color);
    font-weight: 700;
}

/* Footer */
.footer-main {
    background: linear-gradient(135deg, var(--secondary-color), #1B5E20) !important;
    color: white;
    position: relative;
}

.footer-main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.footer-main a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-main a:hover {
    color: var(--accent-color);
}

/* School Info Card */
.school-info-card {
    background: linear-gradient(135deg, var(--primary-light), var(--background-yellow-green));
    border-left: 4px solid var(--primary-color);
}

/* Year Badge */
.year-badge {
    background: linear-gradient(135deg, var(--accent-color), #FF8F00);
    color: var(--secondary-color);
    font-weight: 800;
    font-size: 0.8rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        text-align: center;
        padding: 2rem 1rem !important;
    }
    
    .display-5 {
        font-size: 2rem;
    }
    
    .logo {
        height: 50px !important;
    }
    
    .stats-section h4 {
        font-size: 2rem;
    }
    
    .navbar-nav .nav-link {
        text-align: center;
        margin: 2px 0;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-light);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Pulse Animation for New Items */
.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(139, 195, 74, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(139, 195, 74, 0); }
    100% { box-shadow: 0 0 0 0 rgba(139, 195, 74, 0); }
}