:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --border-color: #000000;
    --hover-bg: #f0f0f0;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-main);
    line-height: 1.5;
    display: flex;
    justify-content: center;
    min-height: 100vh;
    padding: 40px 20px;
}

.container {
    width: 100%;
    max-width: 800px;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.05em;
    margin-bottom: 40px;
    text-transform: uppercase;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.panel {
    margin-bottom: 40px;
    border: 1px solid var(--border-color);
    padding: 20px;
}

.panel h2 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.input-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

input {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--border-color);
    font-family: var(--font-main);
    font-size: 0.9rem;
    outline: none;
    transition: background-color 0.2s;
    min-width: 200px;
}

input:focus {
    background-color: var(--hover-bg);
}

button {
    background-color: var(--text-color);
    color: var(--bg-color);
    border: 1px solid var(--text-color);
    padding: 12px 24px;
    font-family: var(--font-main);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    text-transform: uppercase;
    transition: all 0.2s;
}

button:hover {
    background-color: var(--bg-color);
    color: var(--text-color);
}

button:active {
    transform: translateY(1px);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

th, td {
    text-align: left;
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

th {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

td button {
    padding: 6px 12px;
    font-size: 0.7rem;
}

#notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 300px;
}

.notification {
    background-color: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 15px;
    font-size: 0.85rem;
    box-shadow: 4px 4px 0px rgba(0,0,0,1);
    cursor: pointer;
    animation: slideIn 0.3s ease-out forwards;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.notification.error {
    border-width: 2px;
}

.notification-close {
    margin-left: 10px;
    font-weight: bold;
    cursor: pointer;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: translateX(20px);
    }
}