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

:root {
    --primary-color: #4a90e2;
    --primary-hover: #357abd;
    --danger-color: #e74c3c;
    --danger-hover: #c0392b;
    --success-bg: #d4edda;
    --success-text: #155724;
    --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    --card-bg: #ffffff;
    --text-color: #333;
    --shadow: 0 10px 25px rgba(0,0,0,0.1);
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-color);
    min-height: 100vh;
    padding: 40px 20px;
    line-height: 1.6;
}

.container {
    background: var(--card-bg);
    max-width: 900px;
    margin: 0 auto;
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

h1, h2, h3 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-weight: 600;
}

h1 {
    text-align: center;
    font-size: 1.8rem;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 15px;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s;
}

.header-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.logout-btn {
    background-color: var(--danger-color);
    color: white !important;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    box-shadow: 0 4px 6px rgba(231, 76, 60, 0.3);
}

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

form {
    max-width: 600px;
    margin: 0 auto 30px auto;
    background: #fdfdfd;
    padding: 25px;
    border-radius: 10px;
    border: 1px solid #eee;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

input[type="text"], 
input[type="password"], 
input[type="date"] {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.2);
    outline: none;
}

input[type="submit"], button, .btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-block;
}

input[type="submit"]:hover, button:hover, .btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(74, 144, 226, 0.3);
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.85rem;
    margin-right: 5px;
}

.btn-delete {
    background-color: var(--danger-color);
}
.btn-delete:hover {
    background-color: var(--danger-hover);
    box-shadow: 0 5px 15px rgba(231, 76, 60, 0.3);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background-color: #f8f9fa;
    color: #444;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

tr:hover {
    background-color: #f1f7ff;
}

.msg-success {
    background-color: var(--success-bg);
    color: var(--success-text);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    border-left: 5px solid #28a745;
}

.msg-error {
    background-color: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    border-left: 5px solid var(--danger-color);
}

.text-center { text-align: center; }
.mt-2 { margin-top: 20px; }
hr { border: 0; border-top: 1px solid #eee; margin: 30px 0; }