/* css/formula-page.css — Formula Detail Page Styles */
/* Extends the product detail design with formula-specific sections */

/* ================================================================
   HERO SECTION — Gradient header with formula info
   ================================================================ */
.formula-hero-section {
    padding: var(--spacing-xl) 0 var(--spacing-3xl);
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #dbeafe 100%);
    position: relative;
}

.formula-hero-section .breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.formula-hero-section .breadcrumb a {
    color: var(--color-secondary-main);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.formula-hero-section .breadcrumb a:hover {
    color: var(--color-secondary-dark);
    text-decoration: underline;
}

.formula-hero-section .breadcrumb span {
    color: var(--text-light);
}

/* ================================================================
   HERO GRID — Info left, Image right
   ================================================================ */
.formula-hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-2xl);
    align-items: stretch;
}

/* ================================================================
   IMAGE CARD — Premium glass card on right
   ================================================================ */
.formula-image-card {
    position: relative;
    background: white;
    border-radius: 20px;
    overflow: hidden;
    height: 100%;
    min-height: 300px;
    box-shadow:
        0 4px 24px rgba(13, 52, 96, 0.1),
        0 1px 4px rgba(0, 0, 0, 0.06);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.formula-image-card:hover {
    box-shadow:
        0 8px 40px rgba(13, 52, 96, 0.15),
        0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Image display area */
.formula-image-display {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0d3460 0%, #0a4d8c 50%, #0075c9 100%);
    border-radius: 20px;
    overflow: hidden;
}

.formula-image-display.has-image {
    background: #f8fafc;
}

/* Actual image */
.formula-image-img {
    width: 100%;
    height: 100%;
    min-height: 320px;
    object-fit: cover;
    display: block;
    border-radius: 20px;
    transition: transform 0.4s ease;
}

.formula-image-card:hover .formula-image-img {
    transform: scale(1.02);
}

/* Placeholder icon when no image */
.formula-image-placeholder-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.5);
    font-size: 4rem;
    user-select: none;
    pointer-events: none;
}

.formula-image-placeholder-icon i {
    animation: placeholderFloat 3s ease-in-out infinite;
    filter: drop-shadow(0 4px 16px rgba(0, 0, 0, 0.25));
}

@keyframes placeholderFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* ================================================================
   DROP ZONE — Only visible in edit mode
   ================================================================ */
.formula-image-dropzone {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background: rgba(13, 52, 96, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 20px;
    border: 3px dashed rgba(255, 255, 255, 0.35);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, border-color 0.3s ease;
    z-index: 10;
}

.formula-image-dropzone i {
    font-size: 2.5rem;
    color: rgba(255, 255, 255, 0.85);
    filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.3));
}

.formula-image-dropzone span {
    font-size: 14px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.formula-image-upload-btn {
    background: linear-gradient(135deg, #0075c9, #00c3d1);
    color: white;
    border: none;
    padding: 10px 22px;
    border-radius: 12px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.25s ease;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
    margin-top: 4px;
}

.formula-image-upload-btn:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 6px 20px rgba(0, 117, 201, 0.5);
}

/* Show drop zone on hover in edit mode */
body.fe-edit-mode .formula-image-dropzone {
    pointer-events: auto;
}

body.fe-edit-mode .formula-image-card:hover .formula-image-dropzone {
    opacity: 1;
}

/* Active drag state */
body.fe-edit-mode .formula-image-card.dragging-over .formula-image-dropzone {
    opacity: 1;
    border-color: #00c3d1;
    background: rgba(0, 195, 209, 0.25);
}

body.fe-edit-mode .formula-image-card.dragging-over .formula-image-dropzone i {
    color: #00c3d1;
    animation: dropBounce 0.6s ease infinite;
}

@keyframes dropBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}


/* Related Formulas Card */
.formula-related-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    border-top: 3px solid var(--color-primary-main, #0075c9);
}

.formula-related-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid #e2e8f0;
}

.formula-related-header i {
    color: var(--color-primary-main, #0075c9);
    font-size: 1.1rem;
}

.formula-related-header h4 {
    font-size: var(--font-size-md);
    font-weight: 700;
    color: var(--color-primary-main, #0075c9);
    margin: 0;
}

.formula-related-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.formula-info-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Meta badges */
.formula-meta-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.formula-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

.formula-badge:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    filter: brightness(1.1);
}

.formula-badge.category { background: #00c698; color: white; }
.formula-badge.application { background: #0075c9; color: white; }
.formula-badge.difficulty { background: #f59e0b; color: white; }
.formula-badge.difficulty.beginner { background: #22c55e; }
.formula-badge.difficulty.intermediate { background: #f59e0b; }
.formula-badge.difficulty.advanced { background: #ef4444; }

/* Formula title */
.formula-main-title {
    font-family: var(--font-heading);
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: #0d3460;
    margin: 0 0 var(--spacing-xs);
    line-height: 1.2;
}

.formula-subtitle {
    font-family: var(--font-heading);
    font-size: var(--font-size-xl);
    font-weight: 400;
    color: #0075c9;
    margin: 0 0 var(--spacing-md);
    line-height: 1.5;
}

/* Formula description in hero */
.formula-hero-description {
    font-size: var(--font-size-md);
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
}

/* CTA Buttons */
.formula-cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.formula-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-base);
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
}

.formula-cta-primary {
    background: linear-gradient(135deg, #0d3460 0%, #0075c9 100%);
    color: white;
}

.formula-cta-primary:hover {
    background: linear-gradient(135deg, #0a2a4d 0%, #005fa3 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.formula-cta-secondary {
    background: white;
    color: #0075c9;
    border: 2px solid #0075c9;
}

.formula-cta-secondary:hover {
    background: #0075c9;
    color: white;
}

/* ================================================================
   CONTENT SECTIONS — Shared section card style
   ================================================================ */
.formula-detail-content {
    padding: var(--spacing-2xl) 0;
    background: #f8fafc;
}

.formula-content-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.formula-section {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.formula-section-title {
    font-family: var(--font-heading);
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: #0d3460;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid #e2e8f0;
}

.formula-section-title i {
    color: #0075c9;
    font-size: 1.1em;
}

/* ================================================================
   COMPONENTS TABLE
   ================================================================ */
.components-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.components-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.components-table thead {
    background: linear-gradient(135deg, #0d3460 0%, #1e40af 100%);
    color: white;
}

.components-table th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    white-space: nowrap;
}

.components-table td {
    padding: 12px 16px;
    border-bottom: 1px solid #f1f5f9;
    color: var(--text-primary);
    vertical-align: middle;
}

.components-table tbody tr {
    transition: background var(--transition-fast);
}

.components-table tbody tr:nth-child(even) {
    background: #f8fafc;
}

.components-table tbody tr:hover {
    background: #eff6ff;
}

.component-name {
    font-weight: 600;
    color: #0d3460;
}

.component-percentage {
    font-weight: 700;
    color: #0075c9;
    font-family: var(--font-mono, 'Roboto Mono', monospace);
}

.component-function {
    color: var(--text-secondary);
    font-size: 0.9em;
}

.component-product-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: #0075c9;
    text-decoration: none;
    font-size: 0.85em;
    font-weight: 500;
    padding: 2px 8px;
    background: #eff6ff;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.component-product-link:hover {
    background: #0075c9;
    color: white;
}

/* Total row */
.components-table .total-row {
    background: #f0f9ff !important;
    font-weight: 700;
}

.components-table .total-row td {
    border-top: 2px solid #0075c9;
    color: #0d3460;
}

/* ================================================================
   PROCEDURE / MANUFACTURING STEPS
   ================================================================ */
.procedure-timeline {
    position: relative;
    padding-left: 50px;
}

.procedure-timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, #0075c9, #00c698, #f59e0b);
    border-radius: 3px;
}

.procedure-step {
    position: relative;
    margin-bottom: var(--spacing-xl);
    padding: 0;
    background: transparent;
    border: none;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.procedure-step.in-view {
    opacity: 1;
    transform: translateY(0);
}

.procedure-step:nth-child(2) { transition-delay: 0.1s; }
.procedure-step:nth-child(3) { transition-delay: 0.2s; }
.procedure-step:nth-child(4) { transition-delay: 0.3s; }
.procedure-step:nth-child(5) { transition-delay: 0.4s; }

/* Step number badge on the timeline */
.procedure-step::before {
    content: attr(data-step);
    position: absolute;
    left: -50px;
    top: 20px;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #0075c9, #00c3d1);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    box-shadow: 0 2px 8px rgba(0, 117, 201, 0.3);
    z-index: 2;
    flex-shrink: 0;
}

/* Step card — vertical layout, animation hero */
.procedure-step-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
    background: white;
    border-radius: 20px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: all 0.3s ease;
    overflow: hidden;
}

.procedure-step-card:hover {
    border-color: #bfdbfe;
    box-shadow: 0 6px 24px rgba(0, 117, 201, 0.12);
    transform: translateX(4px);
}

/* Animation scene container — full-width hero */
.proc-anim {
    width: 100%;
    height: 200px;
    min-width: 0;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    flex: 1;
    position: relative;
    padding: 16px;
    transition: transform 0.3s ease;
}

.procedure-step-card:hover .proc-anim {
    transform: scale(1.02);
}

.proc-anim svg {
    width: 160px;
    height: 160px;
    transition: transform 0.3s ease;
}

/* Step text — below the animation */
.procedure-step-text {
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--text-primary);
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
}

/* ================================================================
   PROCEDURE ANIMATION TYPES — Color themes per action
   ================================================================ */

/* Heating */
.proc-anim[data-action="heating"] {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
}

/* Mixing / Agitation */
.proc-anim[data-action="mixing"] {
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
}

/* Pouring / Adding */
.proc-anim[data-action="pouring"] {
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
}

/* Cooling */
.proc-anim[data-action="cooling"] {
    background: linear-gradient(135deg, #e0f2fe, #bae6fd);
}

/* Emulsifying */
.proc-anim[data-action="emulsifying"] {
    background: linear-gradient(135deg, #ede9fe, #ddd6fe);
}

/* Waiting / Resting */
.proc-anim[data-action="waiting"] {
    background: linear-gradient(135deg, #fce7f3, #fbcfe8);
}

/* Measuring */
.proc-anim[data-action="measuring"] {
    background: linear-gradient(135deg, #fef9c3, #fde047);
}

/* Adding drops (conservador, fragancia) */
.proc-anim[data-action="drops"] {
    background: linear-gradient(135deg, #ccfbf1, #99f6e4);
}

/* Filtering */
.proc-anim[data-action="filtering"] {
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
}

/* Dissolving */
.proc-anim[data-action="dissolving"] {
    background: linear-gradient(135deg, #ede9fe, #c4b5fd);
}

/* pH Testing */
.proc-anim[data-action="ph_testing"] {
    background: linear-gradient(135deg, #cffafe, #a5f3fc);
}

/* Homogenizing */
.proc-anim[data-action="homogenizing"] {
    background: linear-gradient(135deg, #fae8ff, #e879f9);
}

/* Transferring */
.proc-anim[data-action="transferring"] {
    background: linear-gradient(135deg, #dbeafe, #93c5fd);
}

/* Packaging */
.proc-anim[data-action="packaging"] {
    background: linear-gradient(135deg, #e0f2fe, #7dd3fc);
}

/* Quality Check */
.proc-anim[data-action="quality_check"] {
    background: linear-gradient(135deg, #dcfce7, #86efac);
}

/* Generic / default */
.proc-anim[data-action="generic"] {
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
}

/* ================================================================
   SVG ANIMATION KEYFRAMES
   ================================================================ */

/* Flame flicker for heating */
@keyframes flameFlicker {
    0%, 100% { transform: scaleY(1) scaleX(1); opacity: 1; }
    25% { transform: scaleY(1.1) scaleX(0.95); opacity: 0.9; }
    50% { transform: scaleY(0.95) scaleX(1.05); opacity: 1; }
    75% { transform: scaleY(1.05) scaleX(0.97); opacity: 0.85; }
}

.proc-anim[data-action="heating"] svg .flame {
    animation: flameFlicker 1.5s ease-in-out infinite;
    transform-origin: bottom center;
}

/* Rotation for mixing */
@keyframes stirSwirl {
    0%, 100% { transform: rotate(-10deg); }
    50% { transform: rotate(10deg); }
}

.proc-anim[data-action="mixing"] svg .swirl-lines {
    animation: stirSwirl 1.6s ease-in-out infinite;
    transform-origin: 60px 60px;
}

/* Pouring drop */
@keyframes dropFall {
    0% { transform: translateY(-8px); opacity: 0; }
    30% { opacity: 1; }
    100% { transform: translateY(10px); opacity: 0; }
}

.proc-anim[data-action="pouring"] svg .drop {
    animation: dropFall 1.8s ease-in infinite;
}

/* Cooling pulse */
@keyframes coolPulse {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.15); opacity: 1; }
}

.proc-anim[data-action="cooling"] svg .snowflake {
    animation: coolPulse 2s ease-in-out infinite;
    transform-origin: center;
}

/* Emulsion merge */
@keyframes mergePhases {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(3px); }
}

.proc-anim[data-action="emulsifying"] svg .phase-a {
    animation: mergePhases 2s ease-in-out infinite;
}
.proc-anim[data-action="emulsifying"] svg .phase-b {
    animation: mergePhases 2s ease-in-out infinite reverse;
}

/* Hourglass for waiting */
@keyframes hourglassTilt {
    0%, 40%, 100% { transform: rotate(0deg); }
    50%, 90% { transform: rotate(180deg); }
}

.proc-anim[data-action="waiting"] svg .hourglass-body {
    animation: hourglassTilt 4s ease-in-out infinite;
    transform-origin: center;
}

/* Scale bounce for measuring */
@keyframes scaleBalance {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(-3deg); }
    75% { transform: rotate(3deg); }
}

.proc-anim[data-action="measuring"] svg .scale-arm {
    animation: scaleBalance 2s ease-in-out infinite;
    transform-origin: center bottom;
}

/* Drip for drops */
@keyframes pipetteDrip {
    0%, 60% { transform: translateY(0); opacity: 0; }
    65% { opacity: 1; transform: translateY(0); }
    100% { transform: translateY(12px); opacity: 0; }
}

.proc-anim[data-action="drops"] svg .pipette-drop {
    animation: pipetteDrip 2.5s ease-in infinite;
}

/* Generic beaker bubble */
@keyframes bubbleRise {
    0% { transform: translateY(0) scale(1); opacity: 0.7; }
    100% { transform: translateY(-14px) scale(0.5); opacity: 0; }
}

.proc-anim[data-action="generic"] svg .bubble {
    animation: bubbleRise 2s ease-out infinite;
}

/* Pause animations when not in view */
.procedure-step:not(.in-view) .proc-anim svg * {
    animation-play-state: paused !important;
}

/* ================================================================
   RESPONSIVE PROCEDURE
   ================================================================ */
@media (max-width: 768px) {
    .procedure-timeline {
        padding-left: 40px;
    }

    .procedure-step::before {
        left: -42px;
        width: 28px;
        height: 28px;
        font-size: 0.75rem;
    }

    .procedure-step-card {
        border-radius: 16px;
    }

    .proc-anim {
        height: 160px;
        padding: 12px;
    }

    .proc-anim svg {
        width: 130px;
        height: 130px;
    }

    .procedure-step-text {
        padding: var(--spacing-sm) var(--spacing-md) var(--spacing-md);
    }
}

/* ================================================================
   RELATED FORMULAS
   ================================================================ */
.related-formulas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.related-formula-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: #f8fafc;
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.related-formula-card:hover {
    background: #eff6ff;
    border-color: #bfdbfe;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.related-formula-card .rf-img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    flex-shrink: 0;
}

.related-formula-card .rf-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #0075c9 0%, #00c3d1 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.related-formula-card .rf-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
    line-height: 1.4;
}

/* ================================================================
   BACK LINK
   ================================================================ */
.formula-back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-secondary-main);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-md) 0;
    transition: all var(--transition-fast);
    margin-top: var(--spacing-lg);
}

.formula-back-link:hover {
    color: var(--color-secondary-dark);
}

/* ================================================================
   SCROLL INDICATOR
   ================================================================ */
.formula-scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    color: #0075c9;
    cursor: pointer;
    text-decoration: none;
    animation: formulaBounce 2s infinite;
    z-index: 10;
}

.formula-scroll-indicator:hover {
    background: #0075c9;
    color: white;
}

@keyframes formulaBounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 1024px) {
    .formula-hero-grid {
        grid-template-columns: 1fr;
    }

    .formula-image-card {
        max-width: 450px;
        margin: 0 auto;
    }
}


@media (max-width: 768px) {
    .formula-main-title {
        font-size: var(--font-size-2xl);
    }

    .formula-subtitle {
        font-size: var(--font-size-lg);
    }

    .formula-cta-buttons {
        flex-direction: column;
    }

    .formula-cta {
        width: 100%;
        justify-content: center;
    }

    .components-table th,
    .components-table td {
        padding: 8px 10px;
        font-size: 0.8rem;
    }

    .procedure-timeline {
        padding-left: 38px;
    }

    .procedure-step::before {
        left: -38px;
        width: 26px;
        height: 26px;
        font-size: 0.7rem;
        top: 18px;
    }

    .procedure-step-card {
        border-radius: 14px;
    }

    .proc-anim {
        height: 140px;
        padding: 10px;
    }

    .proc-anim svg {
        width: 110px;
        height: 110px;
    }

    .related-formulas-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .formula-hero-section {
        padding: var(--spacing-md) 0 var(--spacing-xl);
    }

    .formula-meta-badges {
        gap: 6px;
    }

    .formula-badge {
        font-size: 0.75rem;
        padding: 3px 10px;
    }
}

/* ================================================================
   PREMIUM FORMULA CALCULATOR
   ================================================================ */

/* --- Calculator container --- */
.formula-calculator {
    background: linear-gradient(135deg, #0d3460 0%, #1a4a7a 50%, #0075c9 100%);
    border-radius: var(--radius-lg);
    padding: 0;
    margin-bottom: var(--spacing-xl);
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(13, 52, 96, 0.25);
}

/* --- Header bar --- */
.calc-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.calc-header-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: white;
    font-size: var(--font-size-lg);
    font-weight: 700;
    font-family: var(--font-heading);
}

.calc-header-title i {
    font-size: 1.2em;
    color: #38bdf8;
}

.calc-header-actions {
    display: flex;
    gap: 8px;
}

.calc-header-btn {
    width: 36px;
    height: 36px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.8);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    backdrop-filter: blur(4px);
}

.calc-header-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* --- Control zone --- */
.calc-control-zone {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-xl);
    padding: var(--spacing-lg) var(--spacing-xl);
    align-items: start;
}

/* --- Batch input panel --- */
.calc-batch-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.calc-batch-label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.calc-batch-input-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.calc-input-wrapper {
    display: flex;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
}

.calc-input-wrapper input[type="number"] {
    width: 140px;
    padding: 14px 18px;
    border: 2px solid rgba(255, 255, 255, 0.15);
    border-right: none;
    border-radius: 12px 0 0 12px;
    background: rgba(255, 255, 255, 0.08);
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-mono, 'Roboto Mono', monospace);
    outline: none;
    transition: all var(--transition-fast);
    -moz-appearance: textfield;
    backdrop-filter: blur(8px);
}

.calc-input-wrapper input::-webkit-inner-spin-button,
.calc-input-wrapper input::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.calc-input-wrapper input:focus {
    border-color: #38bdf8;
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.calc-input-wrapper select {
    padding: 14px 16px;
    border: 2px solid rgba(255, 255, 255, 0.15);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0 12px 12px 0;
    background: rgba(255, 255, 255, 0.12);
    color: white;
    font-size: var(--font-size-base);
    font-weight: 700;
    cursor: pointer;
    outline: none;
    backdrop-filter: blur(8px);
}

.calc-input-wrapper select option {
    background: #0d3460;
    color: white;
}

/* --- Multiplier buttons --- */
.calc-multipliers {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.calc-mult-btn {
    width: 44px;
    height: 44px;
    border: 1.5px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-xs);
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    backdrop-filter: blur(4px);
}

.calc-mult-btn:hover {
    background: rgba(56, 189, 248, 0.2);
    border-color: #38bdf8;
    color: white;
    transform: scale(1.15);
}

.calc-mult-btn:active {
    transform: scale(0.95);
}

/* --- Quick preset buttons --- */
.calc-presets-row {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    align-items: center;
}

.calc-presets-label {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.5);
    font-weight: 500;
    margin-right: 4px;
    white-space: nowrap;
}

.calc-preset-btn {
    padding: 6px 14px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-xs);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.calc-preset-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
}

.calc-preset-btn.active {
    background: linear-gradient(135deg, #38bdf8, #06b6d4);
    border-color: transparent;
    color: white;
    box-shadow: 0 2px 8px rgba(56, 189, 248, 0.4);
}

/* --- Summary cards --- */
.calc-summary {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 180px;
}

.calc-summary-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    backdrop-filter: blur(8px);
    transition: all var(--transition-fast);
}

.calc-summary-card:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-1px);
}

.calc-summary-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.calc-summary-icon.ingredients { background: rgba(56, 189, 248, 0.2); color: #38bdf8; }
.calc-summary-icon.weight { background: rgba(0, 198, 152, 0.2); color: #00c698; }
.calc-summary-icon.percentage { background: rgba(245, 158, 11, 0.2); color: #f59e0b; }

.calc-summary-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: white;
    font-family: var(--font-mono, 'Roboto Mono', monospace);
    line-height: 1.2;
}

.calc-summary-label {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* ================================================================
   ENHANCED TABLE — Percentage bars & quantity column
   ================================================================ */

/* Percentage bar inside table cells */
.pct-bar-container {
    width: 100%;
    max-width: 80px;
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    overflow: hidden;
    margin-top: 4px;
}

.pct-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #0075c9, #00c698);
    border-radius: 3px;
    transition: width 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    min-width: 2px;
}

/* Quantity column */
.calc-col {
    font-weight: 700;
    color: #0075c9;
    font-family: var(--font-mono, 'Roboto Mono', monospace);
    white-space: nowrap;
    transition: all 0.3s ease;
}

.components-table thead .calc-col {
    min-width: 120px;
}

/* Quantity update animation */
@keyframes qtyFlash {
    0% { background: rgba(56, 189, 248, 0.3); transform: scale(1.05); }
    100% { background: transparent; transform: scale(1); }
}

.qty-updated {
    animation: qtyFlash 0.5s ease-out;
}

/* ================================================================
   PRODUCT SWAP
   ================================================================ */
.product-swap-cell {
    position: relative;
}

.product-swap-trigger {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.product-swap-trigger:hover {
    background: #eff6ff;
    border-color: #bfdbfe;
}

.product-swap-trigger .swap-icon {
    font-size: 0.75rem;
    color: #94a3b8;
    transition: all var(--transition-fast);
}

.product-swap-trigger:hover .swap-icon {
    color: #0075c9;
    transform: rotate(180deg);
}

.product-swap-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 50;
    min-width: 240px;
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    padding: 8px;
    display: none;
}

.product-swap-dropdown.visible {
    display: block;
    animation: dropdownFadeIn 0.2s ease;
}

@keyframes dropdownFadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.swap-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: background var(--transition-fast);
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    color: var(--text-primary);
}

.swap-option:hover {
    background: #f0f9ff;
}

.swap-option.selected {
    background: #eff6ff;
    color: #0075c9;
    font-weight: 600;
}

.swap-option .swap-check {
    color: #0075c9;
    font-size: 0.8rem;
    width: 16px;
}

/* ================================================================
   RESPONSIVE CALCULATOR
   ================================================================ */
@media (max-width: 1024px) {
    .calc-control-zone {
        grid-template-columns: 1fr;
    }

    .calc-summary {
        flex-direction: row;
        flex-wrap: wrap;
        min-width: 0;
    }

    .calc-summary-card {
        flex: 1;
        min-width: 140px;
    }
}

@media (max-width: 768px) {
    .calc-header {
        padding: var(--spacing-sm) var(--spacing-md);
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }

    .calc-control-zone {
        padding: var(--spacing-md);
        gap: var(--spacing-md);
    }

    .calc-batch-input-row {
        flex-wrap: wrap;
    }

    .calc-input-wrapper input[type="number"] {
        width: 100px;
        font-size: 1.2rem;
        padding: 10px 14px;
    }

    .calc-input-wrapper select {
        padding: 10px 12px;
    }

    .calc-mult-btn {
        width: 38px;
        height: 38px;
        font-size: 0.7rem;
    }

    .calc-summary {
        flex-direction: column;
    }

    .calc-summary-card {
        min-width: 0;
    }

    .product-swap-dropdown {
        position: fixed;
        left: 16px;
        right: 16px;
        top: auto;
        bottom: 16px;
        min-width: 0;
    }
}

@media (max-width: 480px) {
    .calc-preset-btn {
        padding: 4px 10px;
        font-size: 0.7rem;
    }

    .calc-header-title {
        font-size: var(--font-size-base);
    }

    .pct-bar-container {
        max-width: 50px;
    }
}

/* ================================================================
   INTEGRATED CALCULATOR & TABLE
   ================================================================ */
.formula-calculator-integrated {
    margin-bottom: 0 !important;
    border-bottom-left-radius: 0 !important;
    border-bottom-right-radius: 0 !important;
    box-shadow: 0 -4px 24px rgba(13, 52, 96, 0.15) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.integrated-table {
    border-top-left-radius: 0 !important;
    border-top-right-radius: 0 !important;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.05);
}

.integrated-table table thead th:first-child {
    border-top-left-radius: 0 !important;
}

.integrated-table table thead th:last-child {
    border-top-right-radius: 0 !important;
}

@media (max-width: 1024px) {
    .formula-calculator-integrated .calc-control-zone {
        grid-template-columns: 1fr;
    }
}

/* ================================================================
   COMPACT CALCULATOR OVERRIDES
   ================================================================ */
.formula-calculator-integrated .calc-header { padding: 8px 16px; }
.formula-calculator-integrated .calc-header-title { font-size: 1rem; }
.formula-calculator-integrated .calc-header-btn { width: 30px; height: 30px; font-size: 0.8rem; }
.formula-calculator-integrated .calc-control-zone { padding: 12px 16px; gap: 16px; }
.formula-calculator-integrated .calc-batch-panel { gap: 8px; }
.formula-calculator-integrated .calc-batch-label { font-size: 0.65rem; margin-bottom: 0; }
.formula-calculator-integrated .calc-input-wrapper input[type="number"] { width: 100px; padding: 8px 12px; font-size: 1.2rem; }
.formula-calculator-integrated .calc-input-wrapper select { padding: 8px 10px; font-size: 0.9rem; }
.formula-calculator-integrated .calc-mult-btn { width: 32px; height: 32px; font-size: 11px; }
.formula-calculator-integrated .calc-preset-btn { padding: 4px 10px; font-size: 11px; }
.formula-calculator-integrated .calc-summary { gap: 8px; flex-direction: row; flex-wrap: wrap; align-items: stretch; justify-content: space-between; }
.formula-calculator-integrated .calc-summary-card { padding: 8px 12px; gap: 8px; flex: 1; min-width: 130px; }
.formula-calculator-integrated .calc-summary-icon { width: 28px; height: 28px; font-size: 0.8rem; }
.formula-calculator-integrated .calc-summary-value { font-size: 0.95rem; }
.formula-calculator-integrated .calc-summary-label { font-size: 0.65rem; }