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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    line-height: 1.5;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    height: 100px;
    padding: 0 var(--spacing-lg);
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
}

.header-left {
    flex: 1; /* 1/3 of the space */
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: fit-content;
}

.header-right {
    flex: 2; /* 2/3 of the space */
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

.main-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background-color: var(--border-color);
    overflow: hidden;
}

.column {
    background-color: var(--bg-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: opacity 0.3s ease;
}

.column.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.column-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    height: 100px; /* Fixed height as requested */
    min-height: 100px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end; /* Align content to bottom */
    background-color: #2A2A2A; /* Default "Enabled" but not necessarily active */
    transition: background-color 0.3s;
}

.column.disabled .column-header {
    background-color: #1F1F1F; /* Slightly darker gray for disabled */
}

.column-3.disabled .column-header {
    background-color: #151515; /* Darkest gray for phase 3 when disabled */
}

.column-header h2 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 800;
    color: #FFFFFF; /* White font for contrast */
    margin: 0;
    letter-spacing: 1px;
}

.column.active .column-header {
    background-color: #333333; /* Strong dark gray for active */
    border-bottom: 2px solid var(--primary-color);
}

.column.active .column-header h2 {
    color: #FFFFFF;
    text-shadow: none;
    display: flex;
    align-items: center;
}

.lang-label {
    cursor: pointer;
    opacity: 0.6;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 2px;
}

.lang-label:hover {
    opacity: 0.9;
}

.lang-label.active {
    opacity: 1;
    color: var(--primary-color);
    transform: scale(1.1);
}

.header-lang-input {
    width: 45px; /* ~33% reduction from 60px */
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    color: var(--text-muted);
    font-size: 0.55rem; /* Reduced for vertical space */
    padding: 0px 2px; /* Minimal padding */
    text-align: center;
    transition: all 0.2s;
    font-family: inherit;
    height: 14px; /* Force small height */
}

.header-lang-input:focus {
    width: 70px;
    border-color: var(--primary-color);
    color: var(--text-color);
    background: var(--card-bg);
}

.header-content-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: flex-end; /* Align to bottom line */
    gap: var(--spacing-sm);
    width: 100%;
}

.limits-info {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: right;
    font-style: italic;
    font-weight: 400;
    line-height: 1.2;
    max-width: 60%; /* Prevent overlapping header text */
    margin-bottom: -13px; /* Shift downward */
}

.mobile-warning {
    display: none;
    flex: 1;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-lg);
    background-color: var(--bg-color);
}

.mobile-warning h2 {
    font-family: var(--font-heading);
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.mobile-warning p {
    color: var(--text-muted);
}

@media (max-width: 768px) {
    .main-grid {
        display: none;
    }

    .mobile-warning {
        display: flex;
    }

    .header-content-wrapper {
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-end;
    }
    
    .limits-info {
        text-align: left;
        font-size: 0.7rem;
        max-width: 100%;
        margin-top: 4px;
    }
    
    .column-header {
        height: auto;
        min-height: 120px;
    }
}

.limit-line.active-tier {
    color: var(--success-color);
    font-weight: 700;
    text-shadow: 0 0 5px rgba(16, 185, 129, 0.3);
}

.column.active .column-header h2::after {
    content: '→';
    font-size: 1.25em;
    animation: slide-arrow 1s infinite ease-in-out;
    display: inline-block;
    margin-left: 10px;
}

@keyframes slide-arrow {
    0%, 100% { transform: translateX(0); opacity: 0.8; }
    50% { transform: translateX(5px); opacity: 1; }
}

.column-content {
    flex: 1;
    padding: var(--spacing-lg);
    padding-bottom: 0; /* Remove bottom gap to fill estate downward */
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md); /* Consistent gap between elements */
    overflow-y: hidden; /* Children like marquee/preview will handle scroll */
}

.column-footer {
    height: 50px;
    padding: 0 var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: var(--spacing-md);
}

/* Form Elements */
.form-group {
    margin-bottom: 0; /* Use parent gap instead */
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-muted);
}

.label-with-action {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.label-with-action label {
    margin-bottom: 0;
}

textarea, input[type="text"] {
    width: 100%;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-color);
    padding: var(--spacing-md);
    font-family: var(--font-serif); /* Default to serif for Academic focus */
    font-size: 1.1rem;
    resize: vertical;
    transition: border-color 0.2s;
}

[data-theme="purple"] textarea, [data-theme="purple"] input[type="text"] {
    font-family: var(--font-sans);
}

textarea:focus, input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

#mainIdea {
    background-color: var(--input-bg);
    color: var(--text-color);
    border: 2px solid var(--primary-color);
    font-weight: 500;
}

[data-theme="purple"] #mainIdea {
    background-color: #EBF1FF;
    color: #1A1A1A;
}

#mainIdea::placeholder {
    color: #666666;
}

textarea {
    min-height: 100px;
    flex: 1; /* Allow growing if space available */
}

.char-count {
    display: block;
    text-align: right;
    font-size: 0.75rem;
    margin-top: 4px;
    color: var(--text-muted);
}

.char-count.error {
    color: var(--error-color);
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: var(--spacing-md) var(--spacing-xl);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md) var(--spacing-xl);
    font-weight: 600;
    cursor: pointer;
}

.btn-secondary:hover {
    border-color: var(--text-muted);
}

.btn-text {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 0.875rem;
    cursor: pointer;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.875rem;
}

.btn-large {
    width: 100%;
    padding: var(--spacing-lg);
    font-size: 1.125rem;
}

.flashy-purple {
    background: var(--primary-color) !important;
    box-shadow: none;
    animation: none;
}

[data-theme="purple"] .flashy-purple {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.4);
    animation: pulse-glow 2s infinite;
}

.badge-success {
    background-color: transparent;
    color: var(--success-color);
    padding: 4px 12px;
    border-radius: var(--border-radius);
    font-size: 0.75rem;
    font-weight: 700;
    border: 1px solid var(--success-color);
}

[data-theme="purple"] .badge-success {
    background-color: rgba(16, 185, 129, 0.1);
}

.skeleton-loader {
    height: 20px;
    background: var(--border-color);
    animation: none;
    border-radius: var(--border-radius);
}

[data-theme="purple"] .skeleton-loader {
    background: linear-gradient(90deg, var(--card-bg) 25%, var(--input-bg) 50%, var(--card-bg) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}