/* Mode Calculator Container */
.mode-calculator-container {
    margin: 0 auto;
    margin-bottom: 2rem;
    max-width: 100%;
}

.mode-card {
    background: #ffffff;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 32px;
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.mode-card:hover {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

/* Calculator Grid - 2 Column Layout */
.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: start;
}

/* Input Column */
.input-column {
    display: flex;
    flex-direction: column;
}

.input-section {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.input-header {
    margin-bottom: 20px;
}

.input-title {
    font-size: 22px;
    font-weight: 700;
    color: #111827;
    margin: 0 0 8px 0;
    line-height: 1.3;
}

.input-hint {
    font-size: 14px;
    color: #6b7280;
    margin: 0;
    line-height: 1.5;
}

.input-wrapper {
    flex: 1;
    margin-bottom: 20px;
}

.data-input {
    width: 100%;
    height: 100%;
    min-height: 300px;
    padding: 16px;
    font-size: 15px;
    line-height: 1.6;
    color: #111827;
    background: #f9fafb;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    resize: vertical;
    transition: all 0.2s ease;
    box-sizing: border-box;
}

.data-input:focus {
    outline: none;
    border-color: #6366f1;
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.data-input::placeholder {
    color: #9ca3af;
}

.input-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    user-select: none;
}

.btn-primary {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary {
    background: #f3f4f6;
    color: #374151;
    border: 1px solid #e5e7eb;
}

.btn-secondary:hover {
    background: #e5e7eb;
    border-color: #d1d5db;
}

.btn-icon {
    font-size: 18px;
    line-height: 1;
}

.btn-label {
    font-weight: 600;
}

/* Error Alert */
.error-alert {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 10px;
    color: #991b1b;
    margin-top: 16px;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-icon {
    font-size: 20px;
    flex-shrink: 0;
}

.alert-message {
    font-size: 14px;
    line-height: 1.5;
}

/* Results Column */
.results-column {
    display: flex;
    flex-direction: column;
}

.results-section {
    display: flex;
    flex-direction: column;
    min-height: 400px;
}

.results-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}


/* Primary Mode Card */
.mode-primary-card {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    color: #ffffff;
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.3);
}

.mode-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    margin-bottom: 20px;
    font-size: 14px;
    font-weight: 600;
    backdrop-filter: blur(10px);
}

.badge-icon {
    font-size: 18px;
}

.mode-values {
    margin-bottom: 12px;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.mode-value {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.mode-value.multiple {
    font-size: 36px;
}

.mode-frequency {
    font-size: 16px;
    opacity: 0.95;
    font-weight: 500;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
}

.stat-box {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    transition: all 0.2s ease;
}

.stat-box:hover {
    background: #f3f4f6;
    border-color: #d1d5db;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.stat-icon {
    font-size: 28px;
    flex-shrink: 0;
    line-height: 1;
}

.stat-info {
    flex: 1;
    min-width: 0;
}

.stat-label {
    font-size: 12px;
    color: #6b7280;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.stat-value {
    font-size: 20px;
    font-weight: 700;
    color: #111827;
    line-height: 1.2;
    word-break: break-word;
}

/* Frequency Visualization */
.frequency-visualization {
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid #e5e7eb;
}

.viz-header {
    margin-bottom: 24px;
}

.viz-title {
    font-size: 20px;
    font-weight: 700;
    color: #111827;
    margin: 0 0 6px 0;
}

.viz-subtitle {
    font-size: 14px;
    color: #6b7280;
    margin: 0;
}

.frequency-chart {
    min-height: 200px;
}

.chart-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
    text-align: center;
    color: #9ca3af;
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-text {
    font-size: 14px;
    margin: 0;
}

/* Frequency Bar Chart */
.frequency-bar-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.frequency-bar-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid #f3f4f6;
}

.frequency-bar-item:last-child {
    border-bottom: none;
}

.bar-value {
    min-width: 60px;
    font-size: 16px;
    font-weight: 600;
    color: #111827;
    text-align: right;
}

.bar-value.is-mode {
    color: #6366f1;
}

.bar-visual {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.bar-track {
    flex: 1;
    height: 32px;
    background: #f3f4f6;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    min-width: 60px;
}

.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #e0e7ff 0%, #c7d2fe 100%);
    border-radius: 8px;
    transition: width 0.6s ease;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 8px;
}

.bar-fill.is-mode {
    background: linear-gradient(90deg, #6366f1 0%, #8b5cf6 100%);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.bar-fill-text {
    font-size: 12px;
    font-weight: 700;
    color: #ffffff;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.bar-fill-text.light {
    color: #6366f1;
    text-shadow: none;
}

.bar-frequency {
    min-width: 50px;
    font-size: 15px;
    font-weight: 600;
    color: #6b7280;
    text-align: left;
}

.bar-frequency.is-mode {
    color: #6366f1;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px 20px;
    min-height: 400px;
}

.empty-icon-large {
    font-size: 56px;
    margin-bottom: 20px;
    opacity: 0.6;
}

.empty-title {
    font-size: 20px;
    font-weight: 700;
    color: #111827;
    margin: 0 0 12px 0;
}

.empty-description {
    font-size: 15px;
    color: #6b7280;
    margin: 0 0 20px 0;
    max-width: 400px;
    line-height: 1.6;
}

.empty-features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    max-width: 400px;
}

.empty-features li {
    padding: 10px 14px;
    background: #f9fafb;
    border-radius: 8px;
    font-size: 14px;
    color: #374151;
    text-align: left;
    border-left: 3px solid #6366f1;
}

/* Mobile Responsive */
@media (max-width: 968px) {
    .calculator-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .mode-card {
        padding: 24px 20px;
    }

    .input-title {
        font-size: 20px;
    }

    .data-input {
        min-height: 200px;
        font-size: 14px;
        padding: 14px;
    }

    .input-actions {
        flex-direction: column-reverse;
    }

    .action-btn {
        width: 100%;
        justify-content: center;
        padding: 14px 24px;
    }

    .results-section {
        min-height: auto;
    }

    .empty-state {
        min-height: 300px;
        padding: 32px 16px;
    }
}

    .mode-primary-card {
        padding: 24px 20px;
    }

    .mode-value {
        font-size: 36px;
    }

    .mode-value.multiple {
        font-size: 28px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .stat-box {
        padding: 16px;
    }

    .frequency-bar-item {
        flex-wrap: wrap;
        gap: 8px;
    }

    .bar-value {
        min-width: 50px;
        font-size: 15px;
    }

    .bar-visual {
        width: 100%;
        order: 3;
    }

    .bar-frequency {
        min-width: auto;
        font-size: 14px;
    }

    .empty-state {
        padding: 48px 20px;
    }

    .empty-title {
        font-size: 20px;
    }

    .empty-description {
        font-size: 15px;
    }

    .empty-features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .mode-card {
        border-radius: 16px;
        padding: 20px 16px;
    }

    .input-title {
        font-size: 18px;
    }

    .data-input {
        min-height: 180px;
    }

    .mode-value {
        font-size: 32px;
    }

    .mode-value.multiple {
        font-size: 24px;
    }

    .stat-box {
        padding: 14px;
        gap: 12px;
    }

    .stat-icon {
        font-size: 24px;
    }

    .stat-value {
        font-size: 18px;
    }

    .empty-state {
        padding: 24px 12px;
        min-height: 250px;
    }

    .empty-icon-large {
        font-size: 48px;
    }

    .empty-title {
        font-size: 18px;
    }

    .empty-description {
        font-size: 14px;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus states for keyboard navigation */
.action-btn:focus-visible {
    outline: 3px solid #6366f1;
    outline-offset: 2px;
}

.data-input:focus-visible {
    outline: 3px solid #6366f1;
    outline-offset: 2px;
}