/* =========================================
   UNIT CONVERTER CSS
   ========================================= */

:root {
    --unit-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --unit-gradient-2: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --unit-gradient-3: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --unit-gradient-4: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --unit-gradient-5: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --unit-bg-dark: #0f172a;
    --unit-bg-card: #1e293b;
    --unit-bg-input: #0f172a;
    --unit-border: #334155;
    --unit-border-light: #475569;
    --unit-white: #ffffff;
    --unit-gray: #cbd5e1;
    --unit-muted: #94a3b8;
    --unit-success: #22c55e;
    --unit-warning: #eab308;
    --unit-danger: #ef4444;
    --unit-purple: #a855f7;
    --unit-blue: #3b82f6;
    --unit-cyan: #06b6d4;
    --unit-orange: #f97316;
    --unit-pink: #ec4899;
}

.unit-conv-wrapper {
    background: linear-gradient(to bottom, var(--unit-bg-dark), var(--unit-bg-card));
    padding: 3rem 1.5rem;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--unit-white);
    line-height: 1.6;
    min-height: 100vh;
}

.unit-conv-wrapper * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.unit-conv-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Header */
.unit-conv-wrapper .calc-header {
    text-align: center;
    margin-bottom: 2rem;
}

.unit-conv-wrapper .header-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--unit-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--unit-white);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.4);
}

.unit-conv-wrapper .calc-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--unit-white);
    margin-bottom: 1rem;
}

.unit-conv-wrapper .calc-description {
    font-size: 1.1rem;
    color: var(--unit-gray);
    max-width: 700px;
    margin: 0 auto;
}

/* Category Tabs */
.unit-conv-wrapper .category-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--unit-bg-card);
    border: 1px solid var(--unit-border);
    border-radius: 1rem;
}

.unit-conv-wrapper .category-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    padding: 0.75rem 1.25rem;
    background: var(--unit-bg-input);
    border: 2px solid var(--unit-border);
    border-radius: 0.75rem;
    color: var(--unit-muted);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 90px;
}

.unit-conv-wrapper .category-tab i {
    font-size: 1.25rem;
}

.unit-conv-wrapper .category-tab:hover {
    border-color: var(--unit-purple);
    color: var(--unit-white);
}

.unit-conv-wrapper .category-tab.active {
    background: var(--unit-gradient);
    border-color: transparent;
    color: var(--unit-white);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

/* Main Converter Card */
.unit-conv-wrapper .main-converter-card {
    background: var(--unit-bg-card);
    border: 1px solid var(--unit-border);
    border-radius: 1.5rem;
    overflow: hidden;
    margin-bottom: 2rem;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
}

.unit-conv-wrapper .converter-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 2rem;
    background: var(--unit-gradient);
}

.unit-conv-wrapper .converter-icon {
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--unit-white);
}

.unit-conv-wrapper .converter-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--unit-white);
}

.unit-conv-wrapper .converter-body {
    padding: 2rem;
}

/* Convert Section */
.unit-conv-wrapper .convert-section {
    margin-bottom: 1rem;
}

.unit-conv-wrapper .section-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--unit-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.75rem;
}

.unit-conv-wrapper .convert-input-wrapper {
    display: flex;
    gap: 1rem;
}

.unit-conv-wrapper .convert-input {
    flex: 1;
    padding: 1.25rem 1.5rem;
    background: var(--unit-bg-input);
    border: 1px solid var(--unit-border-light);
    border-radius: 0.75rem;
    color: var(--unit-white);
    font-size: 1.5rem;
    font-weight: 700;
    transition: all 0.3s ease;
    width: auto;
}

.unit-conv-wrapper .convert-input:focus {
    outline: none;
    border-color: var(--unit-purple);
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.15);
}

.unit-conv-wrapper .convert-input.result {
    background: rgba(102, 126, 234, 0.1);
    border-color: rgba(102, 126, 234, 0.3);
    color: var(--unit-cyan);
}

.unit-conv-wrapper .unit-select {
    min-width: 200px;
    padding: 1rem 1.25rem;
    background: var(--unit-bg-input);
    border: 1px solid var(--unit-border-light);
    border-radius: 0.75rem;
    color: var(--unit-white);
    font-size: 1rem;
    font-weight: 600;
    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='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.25rem;
}

.unit-conv-wrapper .unit-select:focus {
    outline: none;
    border-color: var(--unit-purple);
}

/* Swap Section */
.unit-conv-wrapper .swap-section {
    display: flex;
    justify-content: center;
    margin: 1.5rem 0;
}

.unit-conv-wrapper .swap-btn {
    width: 56px;
    height: 56px;
    border: none;
    border-radius: 50%;
    background: var(--unit-gradient);
    color: var(--unit-white);
    font-size: 1.25rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.unit-conv-wrapper .swap-btn:hover {
    transform: rotate(180deg) scale(1.1);
}

/* Formula Display */
.unit-conv-wrapper .formula-display {
    text-align: center;
    padding: 1rem 1.5rem;
    background: var(--unit-bg-input);
    border: 1px solid var(--unit-border);
    border-radius: 0.75rem;
    margin-bottom: 1.5rem;
}

.unit-conv-wrapper .formula-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--unit-cyan);
    font-family: 'Courier New', monospace;
}

/* Buttons */
.unit-conv-wrapper .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 0.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.unit-conv-wrapper .btn-primary {
    background: var(--unit-gradient);
    color: var(--unit-white);
}

.unit-conv-wrapper .btn-secondary {
    background: var(--unit-bg-input);
    border: 1px solid var(--unit-border);
    color: var(--unit-gray);
}

.unit-conv-wrapper .btn-secondary:hover {
    border-color: var(--unit-purple);
    color: var(--unit-white);
}

.unit-conv-wrapper .btn-copy {
    max-width: 200px;
    margin: 0 auto;
    display: flex;
}

/* Quick Convert Section */
.unit-conv-wrapper .quick-convert-section {
    background: var(--unit-bg-card);
    border: 1px solid var(--unit-border);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.unit-conv-wrapper .quick-convert-section h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--unit-gray);
    margin-bottom: 1rem;
    text-align: center;
}

.unit-conv-wrapper .quick-convert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.75rem;
}

.unit-conv-wrapper .quick-convert-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--unit-bg-input);
    border: 1px solid var(--unit-border);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.unit-conv-wrapper .quick-convert-item:hover {
    border-color: var(--unit-purple);
    transform: translateY(-2px);
}

.unit-conv-wrapper .quick-convert-item .from-unit,
.unit-conv-wrapper .quick-convert-item .to-unit {
    font-size: 0.9rem;
    font-weight: 600;
}

.unit-conv-wrapper .quick-convert-item .from-unit {
    color: var(--unit-white);
}

.unit-conv-wrapper .quick-convert-item .arrow {
    color: var(--unit-purple);
    font-size: 0.8rem;
}

.unit-conv-wrapper .quick-convert-item .to-unit {
    color: var(--unit-cyan);
}

/* Info Cards */
.unit-conv-wrapper .info-card {
    background: var(--unit-bg-card);
    border: 1px solid var(--unit-border);
    border-radius: 1.5rem;
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.unit-conv-wrapper .info-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--unit-white);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.unit-conv-wrapper .info-title i {
    color: var(--unit-purple);
}

/* Conversion Table */
.unit-conv-wrapper .conversion-table-wrapper {
    overflow-x: auto;
}

.unit-conv-wrapper .conversion-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.unit-conv-wrapper .conversion-table th,
.unit-conv-wrapper .conversion-table td {
    padding: 0.75rem;
    text-align: center;
    border: 1px solid var(--unit-border);
}

.unit-conv-wrapper .conversion-table th {
    background: var(--unit-bg-input);
    color: var(--unit-gray);
    font-weight: 600;
    white-space: nowrap;
}

.unit-conv-wrapper .conversion-table td {
    color: var(--unit-white);
    font-family: 'Courier New', monospace;
}

.unit-conv-wrapper .conversion-table td:first-child {
    font-weight: 600;
    background: var(--unit-bg-input);
    text-align: left;
    font-family: inherit;
}

.unit-conv-wrapper .conversion-table tbody tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

/* Common Conversions Grid */
.unit-conv-wrapper .common-conversions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.unit-conv-wrapper .common-group {
    background: var(--unit-bg-input);
    border: 1px solid var(--unit-border);
    border-radius: 0.75rem;
    padding: 1.25rem;
}

.unit-conv-wrapper .common-group h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--unit-white);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.unit-conv-wrapper .common-group h3 i {
    color: var(--unit-purple);
}

.unit-conv-wrapper .common-group ul {
    list-style: none;
}

.unit-conv-wrapper .common-group li {
    display: flex;
    justify-content: space-between;
    padding: 0.4rem 0;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--unit-border);
}

.unit-conv-wrapper .common-group li:last-child {
    border-bottom: none;
}

.unit-conv-wrapper .common-group li span:first-child {
    color: var(--unit-gray);
}

.unit-conv-wrapper .common-group li span:last-child {
    color: var(--unit-cyan);
    font-weight: 600;
    font-family: 'Courier New', monospace;
}

/* Systems Grid */
.unit-conv-wrapper .systems-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.unit-conv-wrapper .system-card {
    background: var(--unit-bg-input);
    border: 1px solid var(--unit-border);
    border-radius: 1rem;
    overflow: hidden;
}

.unit-conv-wrapper .system-header {
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.unit-conv-wrapper .system-header.metric {
    background: var(--unit-gradient-2);
}

.unit-conv-wrapper .system-header.imperial {
    background: var(--unit-gradient-3);
}

.unit-conv-wrapper .system-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--unit-white);
}

.unit-conv-wrapper .system-body {
    padding: 1.25rem;
}

.unit-conv-wrapper .system-body p {
    font-size: 0.9rem;
    color: var(--unit-muted);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.unit-conv-wrapper .system-units {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.unit-conv-wrapper .unit-badge {
    padding: 0.35rem 0.75rem;
    background: var(--unit-bg-card);
    border: 1px solid var(--unit-border);
    border-radius: 2rem;
    font-size: 0.8rem;
    color: var(--unit-cyan);
}

.unit-conv-wrapper .system-countries {
    font-size: 0.85rem;
    color: var(--unit-gray);
}

/* Prefixes Table */
.unit-conv-wrapper .prefixes-table-wrapper {
    overflow-x: auto;
}

.unit-conv-wrapper .prefixes-table {
    width: 100%;
    border-collapse: collapse;
}

.unit-conv-wrapper .prefixes-table th,
.unit-conv-wrapper .prefixes-table td {
    padding: 0.875rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--unit-border);
}

.unit-conv-wrapper .prefixes-table th {
    background: var(--unit-bg-input);
    color: var(--unit-gray);
    font-weight: 600;
    font-size: 0.85rem;
}

.unit-conv-wrapper .prefixes-table td {
    color: var(--unit-white);
    font-size: 0.95rem;
}

.unit-conv-wrapper .prefixes-table tbody tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

.unit-conv-wrapper .prefixes-table tr.base {
    background: rgba(34, 197, 94, 0.1);
}

.unit-conv-wrapper .prefixes-table tr.base td {
    color: var(--unit-success);
    font-weight: 600;
}

/* Tips Grid */
.unit-conv-wrapper .tips-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.unit-conv-wrapper .tip-box {
    padding: 1.5rem;
    background: var(--unit-bg-input);
    border: 1px solid var(--unit-border);
    border-radius: 1rem;
    transition: all 0.3s ease;
}

.unit-conv-wrapper .tip-box:hover {
    border-color: var(--unit-purple);
    transform: translateY(-4px);
}

.unit-conv-wrapper .tip-icon {
    width: 48px;
    height: 48px;
    background: var(--unit-gradient);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--unit-white);
    margin-bottom: 1rem;
}

.unit-conv-wrapper .tip-box h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--unit-white);
    margin-bottom: 0.5rem;
}

.unit-conv-wrapper .tip-box p {
    font-size: 0.85rem;
    color: var(--unit-muted);
    line-height: 1.6;
}

/* FAQ */
.unit-conv-wrapper .faq-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.unit-conv-wrapper .faq-item {
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--unit-border);
}

.unit-conv-wrapper .faq-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.unit-conv-wrapper .faq-item h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--unit-white);
    margin-bottom: 0.5rem;
}

.unit-conv-wrapper .faq-item p {
    font-size: 0.95rem;
    color: var(--unit-muted);
    line-height: 1.7;
}

/* Responsive */
@media (max-width: 1024px) {
    .unit-conv-wrapper .common-conversions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .unit-conv-wrapper .tips-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .unit-conv-wrapper {
        padding: 2rem 1rem;
    }
    
    .unit-conv-wrapper .calc-title {
        font-size: 2rem;
    }
    
    .unit-conv-wrapper .category-tabs {
        gap: 0.35rem;
        padding: 0.75rem;
    }
    
    .unit-conv-wrapper .category-tab {
        padding: 0.5rem 0.75rem;
        min-width: 70px;
        font-size: 0.65rem;
    }
    
    .unit-conv-wrapper .category-tab i {
        font-size: 1rem;
    }
    
    .unit-conv-wrapper .convert-input-wrapper {
        flex-direction: column;
    }
    
    .unit-conv-wrapper .unit-select {
        min-width: 100%;
    }
    
    .unit-conv-wrapper .convert-input {
        font-size: 1.25rem;
        padding: 1rem;
    }
    
    .unit-conv-wrapper .common-conversions-grid {
        grid-template-columns: 1fr;
    }
    
    .unit-conv-wrapper .systems-grid {
        grid-template-columns: 1fr;
    }
    
    .unit-conv-wrapper .tips-grid {
        grid-template-columns: 1fr;
    }
    
    .unit-conv-wrapper .quick-convert-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .unit-conv-wrapper .calc-title {
        font-size: 1.75rem;
    }
    
    .unit-conv-wrapper .header-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .unit-conv-wrapper .category-tabs {
        gap: 0.25rem;
    }
    
    .unit-conv-wrapper .category-tab {
        min-width: 60px;
        padding: 0.4rem 0.5rem;
    }
    
    .unit-conv-wrapper .category-tab span {
        display: none;
    }
    
    .unit-conv-wrapper .category-tab i {
        font-size: 1.1rem;
    }
    
    .unit-conv-wrapper .converter-header {
        padding: 1rem 1.5rem;
    }
    
    .unit-conv-wrapper .converter-body {
        padding: 1.5rem;
    }
    
    .unit-conv-wrapper .info-title {
        font-size: 1.25rem;
    }
}