/* Reset & Base Variables */
:root {
    --bg-primary: #fafaf9;
    --card-bg: #ffffff;
    --border-color: #e7e5e4;
    --text-primary: #1c1917;
    --text-secondary: #78716c;
    --accent-color: #18181b;
    --accent-hover: #3f3f46;
    --accent-soft: #f5f5f4;
    --accent-soft-hover: #e7e5e4;
    --success-color: #16a34a;
    --success-bg: #f0fdf4;
    --success-border: #bbf7d0;
    --error-color: #dc2626;
    --error-bg: #fef2f2;
    --error-border: #fecaca;
    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Layout Container */
.app-container {
    width: 100%;
    max-width: 520px;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    justify-content: space-between;
}

/* Header styling */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 32px;
}

.game-logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.icon-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.icon-btn:hover {
    color: var(--text-primary);
    background-color: var(--accent-soft);
    border-color: var(--text-secondary);
}

.hidden {
    display: none !important;
}

/* Main Workspace */
.game-workspace {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    width: 100%;
}

.sidebar-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
}

.game-area {
    width: 100%;
}

/* Difficulty Selector */
.difficulty-selector {
    display: flex;
    background-color: var(--accent-soft);
    padding: 4px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    width: 100%;
    gap: 2px;
}

.diff-btn {
    flex: 1;
    background: transparent;
    border: none;
    font-family: var(--font-family);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 8px 12px;
    border-radius: 7px;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.diff-btn.active {
    background-color: var(--card-bg);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

/* Stats Bar */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    width: 100%;
    gap: 12px;
}

.stat-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 12px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    box-shadow: var(--shadow-sm);
}

.stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    font-weight: 600;
}

.stat-val {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Interactive Card */
.game-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 100%;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

/* Card Timer */
.timer-container {
    height: 4px;
    background-color: var(--accent-soft);
    width: 100%;
    overflow: hidden;
}

.timer-progress {
    height: 100%;
    width: 100%;
    background-color: var(--accent-color);
    transition: width 0.1s linear, background-color 0.5s ease;
}

.timer-progress.warning {
    background-color: #f97316;
}

.timer-progress.danger {
    background-color: var(--error-color);
}

/* Card Body */
.card-body {
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

/* Scrambled Badges */
.letters-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 8px;
    width: 100%;
    min-height: 48px;
}

.letter-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background-color: var(--card-bg);
    border: 1.5px solid var(--border-color);
    border-radius: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
    user-select: none;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.letter-badge.used {
    background-color: var(--accent-soft);
    color: var(--text-secondary);
    border-style: dashed;
    box-shadow: none;
    transform: scale(0.95);
    opacity: 0.6;
}

.letter-badge.placeholder {
    color: var(--border-color);
    border-style: dashed;
    box-shadow: none;
}

/* Input Form */
#guess-form {
    width: 100%;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
}

#guess-input {
    width: 100%;
    padding: 16px 56px 16px 20px;
    font-family: var(--font-family);
    font-size: 1.125rem;
    font-weight: 600;
    border: 1.5px solid var(--border-color);
    border-radius: 12px;
    outline: none;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: all 0.2s ease;
    text-align: center;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

#guess-input::placeholder {
    text-transform: none;
    letter-spacing: normal;
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

#guess-input:focus {
    border-color: var(--text-primary);
    background-color: var(--card-bg);
    box-shadow: 0 0 0 4px rgba(24, 24, 27, 0.05);
}

.submit-btn {
    position: absolute;
    right: 8px;
    height: 40px;
    width: 40px;
    background-color: var(--accent-color);
    color: var(--card-bg);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.submit-btn:hover {
    background-color: var(--accent-hover);
}

.submit-btn:active {
    transform: scale(0.95);
}

/* Feedback Message */
.feedback-msg {
    min-height: 24px;
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    border-radius: 8px;
    padding: 6px 16px;
    width: 100%;
    opacity: 0;
    transform: translateY(4px);
    transition: all 0.2s ease;
}

.feedback-msg.show {
    opacity: 1;
    transform: translateY(0);
}

.feedback-msg.correct {
    color: var(--success-color);
    background-color: var(--success-bg);
    border: 1px solid var(--success-border);
}

.feedback-msg.incorrect {
    color: var(--error-color);
    background-color: var(--error-bg);
    border: 1px solid var(--error-border);
}

.feedback-msg.info {
    color: var(--text-secondary);
    background-color: var(--accent-soft);
    border: 1px solid var(--border-color);
}

/* Card Actions / Footer */
.card-footer {
    display: flex;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-primary);
}

.action-btn {
    flex: 1;
    background: transparent;
    border: none;
    font-family: var(--font-family);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.action-btn:first-child {
    border-right: 1px solid var(--border-color);
}

.action-btn:hover {
    color: var(--text-primary);
    background-color: var(--accent-soft);
}

.action-btn svg {
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.action-btn:hover svg {
    opacity: 1;
}

/* Multiplier Pill */
.multiplier-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.multiplier-pill {
    background-color: var(--accent-soft);
    border: 1px solid var(--border-color);
    padding: 6px 14px;
    border-radius: 9999px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

#multiplier-val {
    font-weight: 800;
}

.multiplier-details {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Footer Instructions */
.app-footer {
    text-align: center;
    padding-top: 32px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: 32px;
}

.app-footer kbd {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 0.7rem;
    font-family: inherit;
    box-shadow: var(--shadow-sm);
    color: var(--text-primary);
}

/* Modal Overlay & Content */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(26, 26, 26, 0.4);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 1;
    transition: opacity 0.25s ease;
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    width: 90%;
    max-width: 400px;
    padding: 36px 24px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    transform: scale(1);
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.hidden .modal-content {
    transform: scale(0.92);
}

.trophy-wrapper {
    background-color: #fef08a;
    border-radius: 50%;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
    animation: bounce-trophy 2s infinite ease-in-out;
}

.modal-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: -8px;
}

.modal-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    width: 100%;
    margin: 8px 0;
}

.m-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    border: 1px solid var(--border-color);
    padding: 12px 6px;
    border-radius: 12px;
    background-color: var(--bg-primary);
}

.m-val {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
}

.m-lbl {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-weight: 600;
    margin-top: 4px;
}

.primary-btn {
    background-color: var(--accent-color);
    color: var(--card-bg);
    border: none;
    border-radius: 12px;
    padding: 14px 28px;
    font-family: var(--font-family);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
    margin-top: 8px;
}

.primary-btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.primary-btn:active {
    transform: translateY(0);
}

/* Animations */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-6px); }
    40%, 80% { transform: translateX(6px); }
}

.shake {
    animation: shake 0.4s ease-in-out;
}

@keyframes bounce-trophy {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

@keyframes bounce-badge {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.badge-bounce {
    animation: bounce-badge 0.3s ease;
}

/* Responsive adjustments */
@media (max-width: 480px) {
    .app-container {
        padding: 16px 8px;
    }
    
    .card-body {
        padding: 24px 16px;
    }
    
    .letter-badge {
        width: 38px;
        height: 38px;
        font-size: 1.1rem;
    }

    #guess-input {
        padding: 14px 48px 14px 16px;
        font-size: 1rem;
    }
}

@media (min-width: 768px) {
    .app-container {
        max-width: 1000px;
        width: 90%;
        min-height: 85vh;
        height: auto;
        padding: 32px;
        margin: auto;
        justify-content: center;
        gap: 32px;
    }

    .app-header {
        margin-bottom: 24px;
        padding-bottom: 16px;
    }

    .game-workspace {
        display: grid;
        grid-template-columns: 280px 1fr;
        gap: 32px;
        align-items: stretch;
        width: 100%;
        margin: auto 0;
    }

    .sidebar-panel {
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        gap: 24px;
        height: 100%;
    }

    .stats-bar {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .stat-item {
        flex-direction: row;
        justify-content: space-between;
        padding: 16px 20px;
        border-radius: 12px;
    }

    .stat-label {
        font-size: 0.8rem;
    }

    .stat-val {
        font-size: 1.35rem;
    }

    .game-area {
        height: 100%;
        display: flex;
        align-items: stretch;
    }

    .game-card {
        height: 100%;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        min-height: 480px;
    }

    .card-body {
        flex-grow: 1;
        display: flex;
        flex-direction: column;
        justify-content: center;
        padding: 48px 36px;
        gap: 36px;
    }

    .letters-container {
        gap: 12px;
        margin-bottom: 12px;
    }

    .letter-badge {
        width: 58px;
        height: 58px;
        font-size: 1.6rem;
        border-radius: 12px;
        border-width: 2px;
    }

    #guess-input {
        padding: 18px 64px 18px 24px;
        font-size: 1.35rem;
        border-radius: 14px;
    }

    .submit-btn {
        right: 12px;
        height: 48px;
        width: 48px;
        border-radius: 10px;
    }

    .feedback-msg {
        font-size: 1.05rem;
        padding: 10px 24px;
    }

    .card-footer {
        padding: 8px;
    }

    .action-btn {
        padding: 20px;
        font-size: 0.95rem;
    }

    .multiplier-container {
        margin-top: auto;
        padding: 20px;
        border: 1px solid var(--border-color);
        background-color: var(--card-bg);
        border-radius: 16px;
        box-shadow: var(--shadow-sm);
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }

    .multiplier-pill {
        font-size: 0.9rem;
        padding: 8px 18px;
    }

    .multiplier-details {
        font-size: 0.8rem;
    }
}