.learning-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    box-sizing: border-box;
    flex: 1;
}

.header-layout {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 30px;
    margin-bottom: 40px;
}

.title-block {
    flex: 0 0 350px;
}

.sticker-canvas-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.03);
    border-radius: 20px;
    padding: 6px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    min-height: 130px;
    overflow: hidden;
}

.sticker-canvas {
    display: flex;
    flex-direction: row;
    overflow-x: auto;
    gap: 15px;
    padding: 5px;
    width: 100%;
    scroll-behavior: smooth;
}

.sticker-canvas::-webkit-scrollbar {
    height: 6px;
}

.sticker-canvas::-webkit-scrollbar-thumb {
    background: #e0e0e0;
    border-radius: 10px;
}

.add-sticker-btn {
    flex-shrink: 0;
    width: 80px;
    height: 110px;
    border: 2px dashed #bdc3c7;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8em;
    color: #bdc3c7;
    cursor: pointer;
    transition: all 0.2s;
    margin-right: 10px;
    font-family: var(--font-heading);
}

.add-sticker-btn:hover {
    border-color: #7f8c8d;
    color: #7f8c8d;
    background: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

/* Compact stickers for horizontal view */
.sticker-canvas .sticker-thought {
    flex-shrink: 0;
    width: 140px !important;
    height: 110px !important;
    margin: 0 !important;
    font-size: 0.85em;
    position: relative;
    transform: rotate(0deg) !important;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    border-radius: 12px;
    overflow: hidden;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #888;
    text-decoration: none;
    margin-bottom: 30px;
    font-weight: 600;
    transition: color 0.2s;
}

.learning-card {
    background: white;
    padding: 50px 40px;
    border-radius: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    border: 1px solid #f0e0d0;
    margin-bottom: 40px;
    text-align: center;
}

.sentence-display {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 15px;
    min-height: 220px;
    margin: 40px 0;
    flex-wrap: wrap;
    padding: 20px;
    background: #fafafa;
    border-radius: 20px;
    border: 1px dashed #eee;
    position: relative;
}

.word-slot {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    min-width: 60px;
    transition: all 0.3s;
}

.word-label {
    font-size: 0.65rem;
    font-weight: 800;
    color: #95a5a6;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 2px 6px;
    border-radius: 4px;
    background: #eee;
    opacity: 0;
    transition: opacity 0.3s;
}

.word-slot.visible .word-label {
    opacity: 1;
}

.word-box {
    font-size: 2rem;
    font-weight: 700;
    padding: 8px 16px;
    border-radius: 12px;
    background: white;
    color: #2c3e50;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    border-bottom: 4px solid #dfe6e9;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    white-space: nowrap;
}

.word-slot.visible .word-box {
    opacity: 1;
    transform: translateY(0);
}

/* Part highlighting */
.word-part {
    display: inline-block;
}

.word-part.ending {
    color: #e74c3c;
    font-weight: 800;
}

.word-part.suffix {
    color: #2980b9;
}

.word-translation {
    font-size: 0.85rem;
    color: #7f8c8d;
    font-weight: 500;
    opacity: 0;
    transition: opacity 0.3s;
    max-width: 120px;
    text-align: center;
    line-height: 1.2;
}

.show-translation .word-slot.visible .word-translation {
    opacity: 1;
}

/* Flash Mode: Only words, no labels or translations */
.flash-mode .word-label,
.flash-mode .word-translation {
    display: none !important;
}

.flash-mode .word-box {
    border-bottom-color: transparent !important;
    box-shadow: none !important;
    background: transparent !important;
    opacity: 1 !important;
    transform: none !important;
}

.flash-mode .word-part {
    color: inherit !important;
    font-weight: inherit !important;
}

/* Role-based Colors */
.role-Predicate .word-box {
    border-color: #ff7675;
}

.role-Subject .word-box {
    border-color: #74b9ff;
}

.role-Attribute .word-box,
.role-Attribute_Subject .word-box {
    border-color: #55efc4;
}

.role-Attribute_Object .word-box {
    border-color: #55efc4;
}

.role-Object .word-box {
    border-color: #a29bfe;
}

.role-Circumstance .word-box,
.role-Adverbial .word-box {
    border-color: #ffeaa7;
}

.role-Predicate .word-label {
    color: #d63031;
    background: #fff5f5;
}

.role-Subject .word-label {
    color: #0984e3;
    background: #f0f7ff;
}

.role-Attribute .word-label,
.role-Attribute_Subject .word-label {
    color: #00b894;
    background: #f0fffb;
}

.role-Attribute_Object .word-label {
    color: #00b894;
    background: #f0fffb;
}

.role-Object .word-label {
    color: #6c5ce7;
    background: #f5f3ff;
}

.role-Circumstance .word-label,
.role-Adverbial .word-label {
    color: #e67e22;
    background: #fffcf0;
}

.controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
}

.btn-action {
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: inherit;
}

.btn-run {
    background: #2c3e50;
    color: white;
}

.btn-run:hover {
    background: #34495e;
    transform: scale(1.05);
}

.btn-toggle {
    background: #fdfaf7;
    color: #f2994a;
    border: 1px solid #f2994a;
}

.btn-toggle.active {
    background: #f2994a;
    color: white;
}

.lang-selector {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
}

.lang-btn {
    padding: 8px 20px;
    border: 2px solid #ddd;
    background: white;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    font-family: inherit;
}

.lang-btn.active {
    border-color: #f2994a;
    color: #f2994a;
}

.legend {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 40px;
    font-size: 0.8rem;
    color: #888;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}