:root {
    --primary-color: #0d0d0d;
    --secondary-color: #1a1a1a;
    --accent-color: #0f0;
    --text-color: #e0e0e0;
    --border-color: #333;
    --glow-color: rgba(0, 255, 0, 0.5);
    --error-color: #ff0000;
}

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

body {
    font-family: 'Source Code Pro', monospace;
    background-color: var(--primary-color);
    color: var(--text-color);
    line-height: 1.6;
}

header {
    background-color: var(--secondary-color);
    padding: 1rem 2rem;
    border-bottom: 2px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.header-content {
    display: flex;
    align-items: center;
}

.logo {
    width: 50px;
    height: 50px;
    margin-right: 1rem;
}

header h1 {
    font-size: 1.2rem;
    color: var(--accent-color);
    text-shadow: 0 0 5px var(--glow-color);
}

.header-info {
    display: flex;
    gap: 1.5rem;
    font-size: 0.9rem;
}

.container {
    display: flex;
    padding: 2rem;
    gap: 2rem;
    flex-wrap: wrap;
}

.machine-interface, .information-hub {
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    flex: 1;
    min-width: 400px;
}

h2, h3 {
    color: var(--accent-color);
    text-shadow: 0 0 3px var(--glow-color);
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--accent-color);
    padding-bottom: 0.5rem;
}

.machine-display {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    align-items: center;
}

.machine-image {
    width: 200px;
    height: auto;
    border: 2px solid var(--border-color);
}

.machine-screen {
    flex-grow: 1;
    height: 60px;
    background-color: #000;
    border: 3px inset var(--border-color);
    color: var(--accent-color);
    font-size: 1.5rem;
    text-align: center;
    padding: 0.75rem;
    text-shadow: 0 0 5px var(--glow-color);
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    animation: flicker 0.1s infinite alternate;
}

@keyframes flicker {
    from { opacity: 0.95; }
    to { opacity: 1; }
}

.interaction-panel {
    display: flex;
    gap: 1rem;
}

.keypad {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    flex-grow: 1;
}

#request-input {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--primary-color);
    border: 1px solid var(--border-color);
    color: var(--accent-color);
    font-family: 'Source Code Pro', monospace;
    font-size: 1rem;
}

#request-input:focus {
    outline: 1px solid var(--accent-color);
    box-shadow: 0 0 10px var(--glow-color);
}

#dispense-button {
    padding: 0.75rem;
    background-color: #0a0;
    color: #fff;
    border: none;
    cursor: pointer;
    font-family: 'Source Code Pro', monospace;
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    transition: background-color 0.2s, box-shadow 0.2s;
}

#dispense-button:hover {
    background-color: var(--accent-color);
    box-shadow: 0 0 15px var(--glow-color);
}

#dispense-button:disabled {
    background-color: #555;
    cursor: not-allowed;
}


.dispense-area {
    width: 120px;
    height: 150px;
    background-color: var(--primary-color);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 10px;
}

.cup-container {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s, transform 0.5s;
}

.cup-container.visible {
    opacity: 1;
    transform: translateY(0);
}

.cup {
    width: 80px;
    height: 100px;
    background-color: #fff;
    border: 1px solid #ccc;
    border-bottom-left-radius: 10px;
    border-bottom-right-radius: 10px;
    position: relative;
    overflow: hidden;
    clip-path: polygon(10% 0, 90% 0, 100% 100%, 0% 100%);
}

.liquid {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0;
    background-color: #c68e17; /* Default coffee color */
    transition: height 2s ease-out;
}

.tabs {
    display: flex;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.tab-button {
    background: none;
    border: none;
    color: var(--text-color);
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    font-family: 'Source Code Pro', monospace;
    font-size: 1rem;
    border-bottom: 2px solid transparent;
}

.tab-button.active {
    color: var(--accent-color);
    border-bottom: 2px solid var(--accent-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.log-entries {
    max-height: 300px;
    overflow-y: auto;
    padding-right: 1rem;
    border-left: 2px solid var(--border-color);
}

.log-entry {
    background-color: var(--primary-color);
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    border: 1px solid var(--border-color);
}

.log-entry:first-child {
    margin-top: 1rem;
}
.log-entry:last-child {
    margin-bottom: 0;
}

::-webkit-scrollbar {
    width: 8px;
}

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

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

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