@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;700&display=swap');

:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --success: #10b981;
    --error: #ef4444;
    --bg: #0f172a;
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text: #f8fafc;
}

body {
    font-family: 'Outfit', sans-serif;
    color: var(--text);
    background: radial-gradient(circle at top right, #1e1b4b, #0f172a);
    min-height: 100vh;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
    box-sizing: border-box;
    overflow-x: hidden;
    transition: background 0.5s ease;
}

#app-container {
    width: 100%;
    max-width: 800px;
    background: var(--glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    margin-bottom: auto;
    margin-top: auto;
}

h1 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 30px;
    background: linear-gradient(to right, #818cf8, #c084fc);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.setup-controls {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

select, button {
    padding: 14px 20px;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

select {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    color: white;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='white'%3e%3cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 15px center;
    background-size: 18px;
}

select:focus { outline: none; border-color: var(--primary); background-color: rgba(255, 255, 255, 0.15); }
option { background: #1e1b4b; color: white; }

button {
    background: var(--primary);
    color: white;
    border: none;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

button:hover { background: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2); }
button:active { transform: translateY(0); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

#game-container { display: none; }

.evaluation-header {
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.progress-info {
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex-grow: 1;
    margin-right: 20px;
}

#current-step { font-weight: 600; font-size: 1.1rem; color: #94a3b8; }

.progress-bar-container {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

#progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(to right, var(--primary), #a855f7);
    transition: width 0.5s ease;
}

.header-buttons {
    display: flex;
    gap: 10px;
}

#source-phrase {
    font-size: 1.8rem;
    font-weight: 600;
    text-align: center;
    margin: 30px 0;
    color: #fff;
    padding: 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 16px;
}

.section-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #64748b;
    margin-bottom: 12px;
    margin-top: 25px;
}

#slots-container, #options-container {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    min-height: 60px;
    padding: 15px;
    border-radius: 16px;
    background: rgba(0, 0, 0, 0.2);
    align-items: center;
}

#slots-container {
    border: 2px dashed var(--glass-border);
    margin-bottom: 20px;
}

.slot {
    min-width: 80px;
    height: 45px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 15px;
    font-weight: 500;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.slot.drag-over {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
}

.word-chip {
    padding: 10px 18px;
    background: #fff;
    color: #1e293b;
    border-radius: 10px;
    cursor: grab;
    user-select: none;
    font-weight: 600;
    transition: all 0.2s;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.word-chip:hover { transform: scale(1.05); }
.word-chip.dragging { opacity: 0.5; cursor: grabbing; }

.slot.correct { background: rgba(16, 185, 129, 0.15) !important; border: 2px solid var(--success) !important; color: #10b981; }
.slot.incorrect { background: rgba(239, 68, 68, 0.15) !important; border: 2px solid var(--error) !important; color: #ef4444; }

.action-buttons {
    display: flex;
    gap: 15px;
    margin-top: 40px;
    justify-content: center;
}

#verify-btn { background: var(--primary); width: 200px; }
#next-btn { background: var(--success); width: 200px; }

#loader {
    text-align: center;
    padding: 40px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

#results-container {
    text-align: center;
    padding: 20px;
    display: none;
}

#results-container h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--success);
}

.percentage-score {
    font-size: 5rem;
    font-weight: 800;
    margin: 20px 0;
    color: #fff;
}

footer {
    margin-top: 40px;
    text-align: center;
    font-size: 0.85rem;
    color: #64748b;
    width: 100%;
}

@media (max-width: 640px) {
    #app-container { padding: 25px; }
    h1 { font-size: 1.8rem; }
    #source-phrase { font-size: 1.3rem; }
    .action-buttons { flex-direction: column; align-items: stretch; }
    #verify-btn, #next-btn { width: 100%; }
    .evaluation-header { flex-direction: column; }
    .header-buttons { margin-top: 15px; width: 100%; justify-content: space-between; }
}