/* css/style.css */
:root {
    --primary: #3498db;
    --secondary: #2ecc71;
    --accent: #e67e22;
    --light: #ecf0f1;
    --dark: #2c3e50;
    --gray: #bdc3c7;
    --white: #ffffff;
    --shadow: 0 4px 12px rgba(0,0,0,0.08);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    color: var(--dark);
    line-height: 1.6;
    transition: var(--transition);
}

.container, .form-container {
    max-width: 900px;
    margin: 30px auto;
    background: var(--white);
    padding: 30px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    animation: fadeInUp 0.6s ease-out;
}

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

h1, h2 {
    color: var(--dark);
    text-align: center;
    margin-bottom: 20px;
    font-weight: 600;
    letter-spacing: 0.5px;
    position: relative;
}

h1::after, h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary);
    margin: 15px auto;
    border-radius: 2px;
    transition: var(--transition);
}

h1:hover::after, h2:hover::after {
    width: 100px;
}

p {
    text-align: center;
    margin: 15px 0;
    font-size: 1rem;
}

a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

a:hover {
    color: var(--secondary);
    text-decoration: underline;
}

a::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary);
    transition: var(--transition);
}

a:hover::before {
    width: 100%;
}

/* NAVBAR INTERAKTIF */
.navbar {
    background: var(--dark);
    padding: 15px 20px;
    border-radius: 12px 12px 0 0;
    margin: 0 -30px 20px -30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.navbar a {
    color: var(--white);
    padding: 8px 16px;
    border-radius: 20px;
    transition: var(--transition);
}

.navbar a:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
    color: var(--secondary);
}

.navbar .logo {
    font-weight: bold;
    font-size: 1.3rem;
    color: var(--secondary);
}

/* FORM STYLING */
input, select, textarea, button {
    width: 100%;
    padding: 12px 16px;
    margin: 12px 0;
    border: 2px solid var(--gray);
    border-radius: 10px;
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

button {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    cursor: pointer;
    font-weight: 600;
    letter-spacing: 0.5px;
    padding: 12px 24px;
    border-radius: 50px;
    transition: var(--transition);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

button:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
    background: linear-gradient(135deg, #2980b9, #27ae60);
}

/* TABLE STYLING */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

th {
    background: var(--primary);
    color: white;
    padding: 12px;
    text-align: left;
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    padding: 12px;
    border-bottom: 1px solid var(--light);
    transition: var(--transition);
}

tr:hover td {
    background: rgba(52, 152, 219, 0.05);
    transform: scale(1.01);
}

/* STATUS MESSAGE */
.error {
    color: #e74c3c;
    background: #fadbd8;
    padding: 12px;
    border-radius: 8px;
    margin: 15px 0;
    border-left: 5px solid #e74c3c;
    animation: shake 0.5s;
}

.success {
    color: #27ae60;
    background: #d5f5e3;
    padding: 12px;
    border-radius: 8px;
    margin: 15px 0;
    border-left: 5px solid #27ae60;
    animation: pulse 1s ease-in-out infinite;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-5px); }
    40%, 80% { transform: translateX(5px); }
}

@keyframes pulse {
    0% { opacity: 0.8; }
    50% { opacity: 1; }
    100% { opacity: 0.8; }
}

/* SUMMARY BOX */
.summary {
    background: var(--light);
    padding: 20px;
    border-radius: 12px;
    margin: 20px 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.05);
}

.summary p {
    margin: 0;
    font-size: 1.1rem;
    text-align: center;
}

.summary p strong {
    font-size: 1.3rem;
    display: block;
    margin-top: 5px;
}

.positive { color: #27ae60; }
.negative { color: #e74c3c; }

/* RESPONSIVE */
@media (max-width: 768px) {
    .container, .form-container {
        margin: 15px;
        padding: 20px;
    }

    .navbar {
        flex-direction: column;
        gap: 10px;
    }

    table {
        font-size: 0.9rem;
    }

    th, td {
        padding: 8px;
    }

    .summary {
        grid-template-columns: 1fr;
    }
}

/* HOVER EFFECT UNTUK CARD */
.card {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-left: 5px solid var(--primary);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    border-left-color: var(--secondary);
}

/* BUTTON GROUP */
.btn-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    margin: 20px 0;
}

.btn-group a, .btn-group button {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: var(--transition);
}

.btn-group a:hover, .btn-group button:hover {
    transform: scale(1.05);
}

/* LOADER (Opsional) */
.loader {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 1s ease-in-out infinite;
    margin-left: 10px;
}

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

/* ANIMASI UNTUK INPUT FOCUS */
.input-focus {
    animation: glow 0.5s ease-in-out;
}

@keyframes glow {
    0% { box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2); }
    50% { box-shadow: 0 0 0 4px rgba(52, 152, 219, 0.4); }
    100% { box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2); }
}