:root {
    --bg-color: #050505; /* Darker background */
    --panel-bg: #111111; /* Dark grey panels */
    --primary: #ffffff; /* White primary */
    --primary-dark: #888888;
    --text-main: #dddddd;
    --text-light: #ffffff;
    --accent: #ff3333; /* Red accent for danger */
    --success: #33ff33;
    --border-color: #333333;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    /* Subtle geometric background */
    background-image: 
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 50px 50px;
}

#app {
    width: 100%;
    height: 100%;
    position: relative;
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.screen.active {
    opacity: 1;
    pointer-events: all;
}

.screen.hidden {
    display: none;
}

/* Panels with square edges */
.panel {
    background: var(--panel-bg);
    border: 2px solid var(--border-color);
    border-radius: 0; /* Kwadratowe ranty */
    padding: 3rem;
    text-align: center;
    box-shadow: 10px 10px 0px rgba(0,0,0,0.5); /* Hard shadow */
    max-width: 500px;
    width: 90%;
}

/* Typography */
h1, h2, h3 {
    color: var(--text-light);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.title-text {
    font-size: 4rem;
    font-weight: 900;
    letter-spacing: 5px;
    margin-bottom: 0.5rem;
}

.accent-text {
    color: var(--success);
}

.subtitle {
    color: var(--primary-dark);
    margin-bottom: 2.5rem;
    font-size: 1.1rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* Inputs, Selects and Buttons */
input[type="text"], select {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--border-color);
    border-radius: 0; /* Kwadratowe ranty */
    background: var(--bg-color);
    color: var(--text-light);
    font-size: 1.1rem;
    outline: none;
    transition: all 0.2s;
    margin-bottom: 1rem;
    appearance: none;
}

select {
    cursor: pointer;
}

input[type="text"]:focus, select:focus {
    border-color: var(--primary);
}

button {
    cursor: pointer;
    border: 2px solid transparent;
    padding: 15px 30px;
    border-radius: 0; /* Kwadratowe ranty */
    font-size: 1.1rem;
    font-weight: bold;
    text-transform: uppercase;
    transition: all 0.2s ease;
    width: 100%;
}

.menu-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.btn-primary {
    background: var(--text-light);
    color: var(--bg-color);
}

.btn-primary:hover {
    background: var(--text-main);
}

.btn-secondary {
    background: transparent;
    color: var(--text-light);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--text-light);
}

.glow-on-hover {
    background: var(--success);
    color: #000;
}

.glow-on-hover:hover {
    background: #55ff55;
}

button:disabled, .glow-on-hover:disabled {
    background: var(--border-color);
    color: #666;
    border-color: transparent;
    cursor: not-allowed;
}

/* Room / Lobby specific */
.room-code-box {
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    padding: 1rem;
    font-size: 1.5rem;
    margin-bottom: 2rem;
    font-weight: bold;
}

.category-selection {
    text-align: left;
    margin-bottom: 2rem;
}

.category-selection label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--primary-dark);
    text-transform: uppercase;
    font-size: 0.9rem;
}

/* Players container */
.players-container {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1rem;
}

.player-status {
    flex: 1;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    padding: 1.5rem 1rem;
    transition: all 0.2s;
}

.player-status.ready {
    border-color: var(--success);
}

.player-status.ready p {
    color: var(--success);
    font-weight: bold;
}

/* Game Interface */
.game-header {
    margin-bottom: 3rem;
    display: flex;
    justify-content: center;
    width: 100%;
}

.category-box {
    background: var(--panel-bg);
    padding: 1rem 3rem;
    border: 2px solid var(--border-color);
    text-align: center;
}

.category-box .label {
    font-size: 0.8rem;
    color: var(--primary-dark);
    text-transform: uppercase;
    letter-spacing: 2px;
    display: block;
    margin-bottom: 5px;
}

.category-box h2 {
    margin: 0;
    font-size: 2.5rem;
    color: var(--text-light);
}

.duel-arena {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4rem;
    margin-bottom: 4rem;
    width: 100%;
    max-width: 1000px;
}

.player-panel {
    background: var(--panel-bg);
    padding: 2rem;
    border: 2px solid var(--border-color);
    text-align: center;
    width: 250px;
    transition: all 0.3s ease;
    opacity: 0.5;
}

.player-panel.active {
    border-color: var(--text-light);
    opacity: 1;
    transform: scale(1.05);
}

.player-panel.danger {
    border-color: var(--accent);
}

.player-panel.danger .timer {
    color: var(--accent);
}

.timer {
    font-size: 4.5rem;
    font-weight: 900;
    color: var(--text-light);
    font-variant-numeric: tabular-nums;
    margin-top: 1rem;
    transition: color 0.3s;
}

/* Card */
.card-center {
    perspective: 1000px;
}

.card {
    width: 160px;
    height: 220px;
    transition: transform 0.5s;
    transform-style: preserve-3d;
}

.card.flip {
    animation: flipCard 0.5s forwards;
}

@keyframes flipCard {
    0% { transform: rotateY(0deg) scale(1); }
    50% { transform: rotateY(90deg) scale(1.1); }
    100% { transform: rotateY(0deg) scale(1); }
}

.card-inner {
    width: 100%;
    height: 100%;
    position: relative;
    background: var(--text-light);
    display: flex;
    justify-content: center;
    align-items: center;
    border: 4px solid var(--panel-bg);
    box-shadow: 8px 8px 0px rgba(0,0,0,0.8);
}

.card-front {
    font-size: 7rem;
    font-weight: 900;
    color: var(--bg-color);
}

.input-area {
    width: 100%;
    max-width: 600px;
    display: flex;
    gap: 1rem;
}

.input-area input {
    flex-grow: 1;
    margin-bottom: 0;
    font-size: 1.5rem;
    text-align: center;
    text-transform: uppercase;
}

.input-area button {
    width: auto;
    padding: 0 40px;
}

/* Strike and Last Word */
.last-word-box {
    background: var(--panel-bg);
    border: 2px solid var(--border-color);
    padding: 10px 20px;
    margin-bottom: 2rem;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn-strike {
    background: var(--accent);
    color: white;
    border: none;
    padding: 5px 15px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    text-transform: uppercase;
    transition: background 0.2s;
    width: auto;
}

.btn-strike:hover {
    background: #ff0000;
}

.btn-strike:disabled {
    background: #555;
    cursor: not-allowed;
}

/* Notifications */
#notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.notification {
    background: var(--accent);
    color: white;
    padding: 15px 25px;
    border: 2px solid #000;
    margin-bottom: 10px;
    box-shadow: 5px 5px 0px rgba(0,0,0,0.5);
    animation: slideIn 0.3s ease forwards, fadeOut 0.3s ease 2.7s forwards;
    font-weight: bold;
    text-transform: uppercase;
}

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

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

.hidden {
    display: none !important;
}