:root {
    --color-bg: #1a1a2e;
    --color-surface: #16213e;
    --color-primary: #e94560;
    --color-secondary: #0f3460;
    --color-success: #00bf63;
    --color-text: #ffffff;
    --color-text-dim: #a0a0a0;
    --color-win: #4ade80;
    --color-lose: #f87171;
    --color-letter-correct: #00bf63;
    --color-letter-wrong: #e94560;
    --color-letter-unused: #0f3460;
    --transition-speed: 0.3s;
}

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

html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: background-color var(--transition-speed) ease;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100%;
    min-height: 100dvh;
    min-width: 320px;
    padding: 20px;
    text-align: center;
}

/* Screens */
.screen {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    width: 100%;
    max-width: 400px;
}

.screen.active {
    display: flex;
}

/* Typography */
h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0;
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.subtitle {
    font-size: 1rem;
    color: var(--color-text-dim);
}

.hint {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    margin-top: -10px;
}

/* Home Screen */
.home-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.hangman-icon {
    width: 80px;
    height: 96px;
    margin-bottom: 8px;
}

.hangman-preview {
    width: 100%;
    height: 100%;
    color: var(--color-primary);
}

/* Buttons */
.btn-primary,
.btn-secondary {
    min-width: 200px;
    min-height: 48px;
    padding: 14px 28px;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.15s ease, opacity 0.15s ease;
    touch-action: manipulation;
}

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

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

.btn-primary:active,
.btn-secondary:active {
    transform: scale(0.95);
    opacity: 0.9;
}

.btn-primary:disabled,
.btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-link {
    background: none;
    border: none;
    color: var(--color-text-dim);
    font-size: 1rem;
    cursor: pointer;
    padding: 10px;
    transition: color 0.2s;
}

.btn-link:hover {
    color: var(--color-text);
}

.btn-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.btn-group.vertical {
    flex-direction: column;
    align-items: center;
}

/* Room Code */
.room-code {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: 0.5rem;
    padding: 20px 30px;
    background-color: var(--color-surface);
    border-radius: 16px;
    font-family: 'Courier New', monospace;
}

/* Input Code */
.input-code {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: 0.5rem;
    padding: 15px 25px;
    background-color: var(--color-surface);
    border: 2px solid var(--color-secondary);
    border-radius: 12px;
    color: var(--color-text);
    text-align: center;
    width: 200px;
    font-family: 'Courier New', monospace;
    text-transform: uppercase;
}

.input-code:focus {
    outline: none;
    border-color: var(--color-primary);
}

.input-code::placeholder {
    color: var(--color-text-dim);
    opacity: 0.5;
}

/* Input Word */
.input-word {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.15rem;
    padding: 15px 20px;
    background-color: var(--color-surface);
    border: 2px solid var(--color-secondary);
    border-radius: 12px;
    color: var(--color-text);
    text-align: center;
    width: 100%;
    max-width: 280px;
    text-transform: uppercase;
}

.input-word:focus {
    outline: none;
    border-color: var(--color-primary);
}

.input-word::placeholder {
    color: var(--color-text-dim);
    opacity: 0.5;
    text-transform: none;
}

/* Error text */
.error-text {
    color: var(--color-primary);
    font-size: 0.9rem;
    min-height: 1.2rem;
}

/* Waiting Indicator */
.waiting-indicator {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-text-dim);
    font-size: 1.1rem;
}

.waiting-indicator.large {
    flex-direction: column;
    font-size: 1.3rem;
}

.waiting-indicator.large .spinner {
    width: 40px;
    height: 40px;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-secondary);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Hangman Drawing */
.hangman-container {
    width: 120px;
    height: 144px;
}

.hangman-drawing {
    width: 100%;
    height: 100%;
    color: var(--color-text-dim);
}

.hangman-part {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.hangman-part.visible {
    opacity: 1;
}

/* Word Display */
.word-display {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.3rem;
    font-family: 'Courier New', monospace;
    padding: 15px;
    background-color: var(--color-surface);
    border-radius: 12px;
    min-width: 200px;
}

/* Errors Display */
.errors-display {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
}

.errors-label {
    color: var(--color-text-dim);
}

.errors-icons {
    font-size: 1.2rem;
    letter-spacing: 2px;
}

/* Keyboard */
.keyboard {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 100%;
    max-width: 340px;
}

.keyboard-row {
    display: flex;
    justify-content: center;
    gap: 4px;
}

.key {
    min-width: 30px;
    min-height: 44px;
    padding: 8px 4px;
    font-size: 1rem;
    font-weight: 600;
    background-color: var(--color-letter-unused);
    color: var(--color-text);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.1s ease, background-color 0.2s ease;
    touch-action: manipulation;
    flex: 1;
    max-width: 36px;
}

.key:active {
    transform: scale(0.9);
}

.key.correct {
    background-color: var(--color-letter-correct);
}

.key.wrong {
    background-color: var(--color-letter-wrong);
}

.key.used {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Player Role */
.player-role {
    font-size: 0.9rem;
    color: var(--color-text-dim);
    padding: 8px 16px;
    background-color: var(--color-surface);
    border-radius: 20px;
}

/* Result Screen */
.result-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.result-emoji {
    font-size: 4rem;
}

.result-text {
    font-size: 2rem;
    font-weight: 700;
}

.result-display.win .result-text {
    color: var(--color-win);
}

.result-display.lose .result-text {
    color: var(--color-lose);
}

.word-reveal {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px;
    background-color: var(--color-surface);
    border-radius: 12px;
}

.word-reveal-label {
    font-size: 0.9rem;
    color: var(--color-text-dim);
}

.word-reveal-word {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 0.2rem;
}

/* Error Screen */
.error-icon {
    font-size: 4rem;
}

.error-message {
    color: var(--color-text-dim);
    font-size: 1.1rem;
    max-width: 280px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 100;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--color-surface);
    border-radius: 16px;
    padding: 30px 25px;
    max-width: 350px;
    width: 100%;
    position: relative;
}

.btn-close {
    position: absolute;
    top: 10px;
    right: 15px;
    background: none;
    border: none;
    color: var(--color-text-dim);
    font-size: 2rem;
    cursor: pointer;
    padding: 5px;
    line-height: 1;
}

.help-steps {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin: 20px 0;
    text-align: left;
}

.help-step {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.help-step .step-num {
    min-width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    font-size: 0.85rem;
    font-weight: 700;
}

.help-step p {
    font-size: 0.95rem;
    line-height: 1.4;
    color: var(--color-text-dim);
}

.help-step strong {
    color: var(--color-text);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: var(--color-surface);
    color: var(--color-text);
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 1rem;
    z-index: 200;
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    border: 1px solid var(--color-secondary);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    border-color: var(--color-success);
}

.toast.error {
    border-color: var(--color-primary);
}

/* Media queries */
@media (min-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    .room-code {
        font-size: 4rem;
    }

    .hangman-container {
        width: 150px;
        height: 180px;
    }

    .word-display {
        font-size: 2.5rem;
    }

    .key {
        min-width: 40px;
        min-height: 50px;
        font-size: 1.2rem;
        max-width: 44px;
    }

    .keyboard {
        gap: 8px;
        max-width: 460px;
    }

    .keyboard-row {
        gap: 6px;
    }
}

@media (max-height: 600px) {
    .container {
        padding: 10px;
    }

    .screen {
        gap: 12px;
    }

    .hangman-container {
        width: 90px;
        height: 108px;
    }

    .word-display {
        font-size: 1.5rem;
        padding: 10px;
    }

    .key {
        min-height: 38px;
    }
}