@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&family=Sarabun:wght@300;400;600;700&display=swap');

:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --secondary: #64748b;
    --bg-main: #f8fafc;
    --card-bg: rgba(255, 255, 255, 0.8);
    --text-dark: #1e293b;
    --text-light: #64748b;
    --glass: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
}

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

body {
    font-family: 'Inter', 'Sarabun', sans-serif;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    color: var(--text-dark);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background Decorations */
body::before {
    content: '';
    position: fixed;
    top: -10%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.1) 0%, transparent 70%);
    z-index: -1;
}

body::after {
    content: '';
    position: fixed;
    bottom: -10%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(20, 184, 166, 0.1) 0%, transparent 70%);
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header Section */
.header {
    text-align: center;
    margin-bottom: 4rem;
    animation: fadeInDown 0.8s ease-out;
}

.college-logo {
    width: 120px;
    height: auto;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 10px 15px rgba(0,0,0,0.1));
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    background: linear-gradient(90deg, #1e293b, #4f46e5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header p {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* Grid Layout */
.systems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    animation: fadeInUp 1s ease-out;
}

/* Portal Card Style */
.system-card {
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2rem;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 30px -10px rgba(0,0,0,0.05);
}

.system-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 100%);
    pointer-events: none;
}

.system-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px -15px rgba(0,0,0,0.1);
    background: rgba(255, 255, 255, 0.9);
}

.icon-wrapper {
    width: 80px;
    height: 80px;
    background: white;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
    box-shadow: 0 8px 16px rgba(0,0,0,0.05);
}

.system-card:hover .icon-wrapper {
    transform: rotate(10deg);
}

.system-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.system-card p {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 5rem;
    padding-bottom: 3rem;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Admin Styles */
.admin-login-container {
    max-width: 400px;
    margin: 100px auto;
    background: white;
    padding: 3rem;
    border-radius: 24px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.05);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    transition: all 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    text-align: center;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
    width: 100%;
}

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

/* Animations */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 768px) {
    .header h1 { font-size: 1.8rem; }
    .systems-grid { grid-template-columns: 1fr; }
}