/* =========================================
   ARTICLE.CSS — TRI5962 — V5.1
   Sport & Performance — Full Width Layout
   ========================================= */

*, *::before, *::after { box-sizing: border-box; }
html, body { overflow-x: hidden; }
img, video, iframe, svg, canvas { max-width: 100%; height: auto; }

/* =========================================
   VARIABLES CSS
   ========================================= */
:root {
    --color-dark: #18181b;
    --color-green: #22c55e;
    --color-yellow: #eab308;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-surface-alt: #f1f5f9;
    --color-border: #e2e8f0;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-text-light: #94a3b8;
    --color-green-light: #dcfce7;
    --color-yellow-light: #fef9c3;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.13);
    --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --container-width: 860px;
    --container-wide: 1100px;
}

/* =========================================
   BASE ARTICLE
   ========================================= */
body {
    font-family: var(--font-system);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    margin: 0;
    padding: 0;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

main {
    min-height: 60vh;
}

/* =========================================
   HERO ARTICLE
   ========================================= */
.article-hero {
    background-color: var(--color-dark);
    color: #fff;
    overflow: hidden;
}

.article-hero__inner {
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 56px 24px 40px;
}

.article-meta-top {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.article-category {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background-color: var(--color-green);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 4px 12px;
    border-radius: 100px;
}

.article-read-time,
.article-date {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.8rem;
    color: #94a3b8;
}

.article-hero__title {
    font-size: clamp(1.7rem, 4vw, 2.8rem);
    font-weight: 800;
    line-height: 1.2;
    margin: 0 0 16px;
    color: #fff;
    max-width: 800px;
}

.article-hero__subtitle {
    font-size: 1.1rem;
    color: #cbd5e1;
    max-width: 680px;
    margin: 0 0 28px;
    line-height: 1.6;
}

.article-author-bar {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-green);
    display: block;
}

.author-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.author-info strong {
    font-size: 0.9rem;
    color: #fff;
    font-weight: 600;
}

.author-info span {
    font-size: 0.78rem;
    color: #94a3b8;
}

.article-hero__visual {
    width: 100%;
    max-height: 420px;
    overflow: hidden;
}

.article-hero__visual img {
    width: 100%;
    height: 420px;
    object-fit: cover;
    display: block;
}

/* =========================================
   ARTICLE CONTAINER
   ========================================= */
.article-container {
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 24px 60px;
}

/* =========================================
   INTRO
   ========================================= */
.article-intro {
    padding: 40px 0 0;
    max-width: var(--container-width);
    margin: 0 auto;
}

.article-lead {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--color-text);
    margin: 0 0 24px;
}

.intro-highlight {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background-color: var(--color-green-light);
    border-left: 4px solid var(--color-green);
    border-radius: var(--radius-md);
    padding: 18px 20px;
}

.intro-highlight svg {
    flex-shrink: 0;
    margin-top: 2px;
}

.intro-highlight p {
    margin: 0;
    font-size: 1rem;
    font-weight: 500;
    color: #15803d;
    line-height: 1.6;
}

/* =========================================
   PROGRESS NAV
   ========================================= */
.article-progress-nav {
    background-color: var(--color-dark);
    border-radius: var(--radius-lg);
    padding: 24px 28px;
    margin: 36px 0;
    color: #fff;
}

.article-progress-nav strong {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-green);
    margin-bottom: 12px;
}

.progress-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    counter-reset: progress-counter;
}

.progress-list li {
    counter-increment: progress-counter;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
}

.progress-list li::before {
    content: counter(progress-counter);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background-color: var(--color-green);
    color: #fff;
    border-radius: 50%;
    font-size: 0.7rem;
    font-weight: 700;
    flex-shrink: 0;
}

.progress-list a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.2s;
}

.progress-list a:hover,
.progress-list a:focus {
    color: var(--color-green);
    text-decoration: underline;
    outline: 2px solid var(--color-green);
    outline-offset: 2px;
    border-radius: 2px;
}

/* =========================================
   TIMELINE LAYOUT
   ========================================= */
.timeline-section {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 0 24px;
    margin: 48px 0;
    position: relative;
}

.timeline-section::before {
    content: '';
    position: absolute;
    left: 39px;
    top: 60px;
    bottom: -48px;
    width: 2px;
    background-color: var(--color-border);
}

.timeline-section:last-of-type::before {
    display: none;
}

.timeline-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding-top: 4px;
}

.timeline-dot {
    width: 48px;
    height: 48px;
    background-color: var(--color-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
    z-index: 1;
    position: relative;
}

.timeline-step {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    white-space: nowrap;
}

.timeline-content {
    padding-bottom: 16px;
}

.timeline-content h2 {
    font-size: clamp(1.3rem, 2.5vw, 1.7rem);
    font-weight: 800;
    color: var(--color-dark);
    margin: 0 0 16px;
    line-height: 1.3;
}

.timeline-content p {
    font-size: 1rem;
    color: var(--color-text);
    line-height: 1.75;
    margin: 0 0 20px;
}

.timeline-content img {
    width: 100%;
    border-radius: var(--radius-md);
    margin: 20px 0;
    display: block;
}

/* =========================================
   STAT CARDS
   ========================================= */
.stat-cards-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin: 28px 0;
}

.stat-card {
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px 16px;
    text-align: center;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    border-color: var(--color-green);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 2rem;
    font-weight: 900;
    color: var(--color-green);
    line-height: 1;
    margin-bottom: 6px;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 500;
    line-height: 1.3;
}

/* =========================================
   EXPERT QUOTE
   ========================================= */
.expert-quote {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background-color: var(--color-dark);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    margin: 32px 0;
}

.expert-quote--alt {
    background-color: var(--color-surface-alt);
    border-left: 4px solid var(--color-yellow);
}

.expert-quote--alt blockquote p {
    color: var(--color-dark);
}

.expert-quote--alt blockquote cite {
    color: var(--color-text-muted);
}

.quote-icon {
    flex-shrink: 0;
    margin-top: 4px;
    opacity: 0.8;
}

.expert-quote blockquote {
    margin: 0;
    border: none;
    padding: 0;
}

.expert-quote blockquote p {
    font-size: 1.1rem;
    font-style: italic;
    color: #e2e8f0;
    line-height: 1.7;
    margin: 0 0 12px;
}

.expert-quote blockquote cite {
    font-size: 0.82rem;
    color: #94a3b8;
    font-style: normal;
    font-weight: 600;
}

/* =========================================
   TABLES
   ========================================= */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 28px 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    background-color: var(--color-surface);
}

.data-table caption {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-align: left;
    padding: 10px 16px 6px;
    caption-side: top;
    font-weight: 500;
}

.data-table thead th {
    background-color: var(--color-dark);
    color: #fff;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 12px 16px;
    text-align: left;
    white-space: nowrap;
}

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

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table tbody tr:hover td {
    background-color: var(--color-surface-alt);
}

.row-highlight td {
    background-color: var(--color-green-light) !important;
}

/* BADGES */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 100px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.badge-green { background-color: var(--color-green-light); color: #15803d; }
.badge-yellow { background-color: var(--color-yellow-light); color: #854d0e; }
.badge-orange { background-color: #fed7aa; color: #9a3412; }
.badge-red { background-color: #fee2e2; color: #991b1b; }
.badge-blue { background-color: #dbeafe; color: #1e40af; }

/* =========================================
   TIP BOXES
   ========================================= */
.tip-box {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background-color: var(--color-green-light);
    border-left: 4px solid var(--color-green);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    margin: 24px 0;
}

.tip-box--yellow {
    background-color: var(--color-yellow-light);
    border-left-color: var(--color-yellow);
}

.tip-box svg {
    flex-shrink: 0;
    margin-top: 2px;
}

.tip-box div {
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.6;
}

.tip-box strong {
    color: var(--color-dark);
}

/* =========================================
   EQUIPMENT GRID
   ========================================= */
.equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin: 28px 0;
}

.equipment-card {
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.equipment-card--priority {
    border-color: var(--color-green);
    background-color: var(--color-green-light);
}

.equipment-card:hover {
    box-shadow: var(--shadow-md);
}

.equipment-priority {
    font-size: 0.68rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #15803d;
    margin-bottom: 12px;
}

.equipment-priority--secondary {
    color: #92400e;
}

.equipment-priority--optional {
    color: var(--color-text-muted);
}

.equipment-icon {
    margin-bottom: 12px;
}

.equipment-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-dark);
    margin: 0 0 8px;
}

.equipment-card p {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin: 0 0 12px;
}

.equipment-budget {
    display: inline-block;
    background-color: var(--color-dark);
    color: var(--color-green);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 100px;
}

/* =========================================
   CHECKLIST
   ========================================= */
.checklist-box {
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin: 28px 0;
}

.checklist-box h3 {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--color-dark);
    margin: 0 0 20px;
}

.checklist-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.checklist-column strong {
    display: block;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-green);
    margin-bottom: 10px;
}

.checklist-items {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.checklist-items li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    color: var(--color-text);
}

/* =========================================
   DISCIPLINES SLIDER
   ========================================= */
.interactive-slider-section {
    background-color: var(--color-dark);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    margin: 48px 0;
    overflow: hidden;
}

.slider-header {
    text-align: center;
    margin-bottom: 28px;
}

.slider-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
    margin: 0 0 8px;
}

.slider-subtitle {
    font-size: 0.88rem;
    color: #94a3b8;
    margin: 0;
}

.disciplines-slider {
    position: relative;
    overflow: hidden;
}

.disciplines-track {
    display: flex;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
}

.discipline-slide {
    min-width: 100%;
    padding: 0 4px;
}

.discipline-icon {
    margin-bottom: 16px;
}

.discipline-slide h3 {
    font-size: 1.4rem;
    font-weight: 800;
    color: #fff;
    margin: 0 0 12px;
}

.discipline-slide p {
    font-size: 0.95rem;
    color: #cbd5e1;
    line-height: 1.7;
    margin: 0 0 16px;
}

.discipline-tips {
    list-style: none;
    margin: 0 0 20px;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.discipline-tips li {
    font-size: 0.9rem;
    color: #e2e8f0;
    padding-left: 16px;
    position: relative;
}

.discipline-tips li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background-color: var(--color-green);
    border-radius: 50%;
}

.discipline-effort {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
    flex-wrap: wrap;
}

.effort-label {
    font-size: 0.8rem;
    color: #94a3b8;
    white-space: nowrap;
}

.effort-bar-container {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 120px;
    background-color: #2d2d35;
    border-radius: 100px;
    height: 10px;
    overflow: hidden;
    position: relative;
}

.effort-bar {
    height: 100%;
    background-color: var(--color-green);
    border-radius: 100px;
    transition: width 0.4s ease;
}

.effort-bar-container span {
    position: absolute;
    right: -36px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-green);
    white-space: nowrap;
}

.slider-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-top: 28px;
}

.slider-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: #2d2d35;
    border: 2px solid #3d3d45;
    border-radius: 50%;
    color: #fff;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
}

.slider-btn:hover,
.slider-btn:focus {
    background-color: var(--color-green);
    border-color: var(--color-green);
    outline: 2px solid var(--color-green);
    outline-offset: 2px;
}

.slider-dots {
    display: flex;
    gap: 8px;
}

.slider-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #3d3d45;
    border: none;
    cursor: pointer;
    padding: 0;
    transition: background-color 0.2s, transform 0.2s;
}

.slider-dot.active {
    background-color: var(--color-green);
    transform: scale(1.3);
}

.slider-dot:focus {
    outline: 2px solid var(--color-green);
    outline-offset: 3px;
}

/* =========================================
   TRAINING PHASES
   ========================================= */
.training-phases {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin: 28px 0;
}

.phase-block {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 2px solid var(--color-border);
    background-color: var(--color-surface);
}

.phase-block--base { border-color: var(--color-green); }
.phase-block--build { border-color: var(--color-yellow); }
.phase-block--peak { border-color: #f97316; }

.phase-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    flex-wrap: wrap;
}

.phase-block--base .phase-header { background-color: var(--color-green-light); }
.phase-block--build .phase-header { background-color: var(--color-yellow-light); }
.phase-block--peak .phase-header { background-color: #fed7aa; }

.phase-number {
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    background-color: #fff;
    padding: 3px 10px;
    border-radius: 100px;
    white-space: nowrap;
}

.phase-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-dark);
    margin: 0;
    flex: 1;
}

.phase-hours {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-text-muted);
    background-color: #fff;
    padding: 4px 12px;
    border-radius: 100px;
    white-space: nowrap;
}

.phase-body {
    padding: 20px;
}

.phase-body p {
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.7;
    margin: 0 0 16px;
}

.phase-schedule {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 8px;
}

.day-item {
    display: flex;
    flex-direction: column;
    gap: 3px;
    padding: 10px 12px;
    background-color: var(--color-surface-alt);
    border-radius: var(--radius-sm);
}

.day-name {
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
}

.day-activity {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
}

.day-activity.swim { color: #0369a1; }
.day-activity.bike { color: #7c3aed; }
.day-activity.run { color: #dc2626; }

.phase-highlights {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.highlight-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.92rem;
    color: var(--color-text);
    line-height: 1.5;
}

.highlight-item svg {
    flex-shrink: 0;
    margin-top: 2px;
}

/* =========================================
   NUTRITION TIMELINE
   ========================================= */
.nutrition-timeline {
    position: relative;
    padding-left: 32px;
    margin: 28px 0;
}

.nutrition-timeline::before {
    content: '';
    position: absolute;
    left: 13px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-border);
}

.nutrition-step {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 28px;
    position: relative;
}

.nutrition-icon {
    width: 44px;
    height: 44px;
    background-color: var(--color-surface);
    border: 2px solid var(--color-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-left: -32px;
    position: relative;
    z-index: 1;
    background-color: #fff;
}

.nutrition-content {
    flex: 1;
    padding-top: 8px;
}

.nutrition-content strong {
    display: block;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 6px;
}

.nutrition-content p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.65;
    margin: 0;
}

/* =========================================
   CALCULATOR
   ========================================= */
.calculator-section {
    background-color: var(--color-surface);
    border: 2px solid var(--color-green);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin: 36px 0;
}

.calculator-header {
    background-color: var(--color-dark);
    padding: 24px 28px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.calculator-header svg {
    margin-bottom: 4px;
}

.calculator-header h3 {
    font-size: 1.1rem;
    font-weight: 800;
    color: #fff;
    margin: 0;
}

.calculator-header p {
    font-size: 0.85rem;
    color: #94a3b8;
    margin: 0;
}

.calculator-body {
    padding: 28px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}

.budget-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.calc-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.calc-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-dark);
}

.calc-group select {
    padding: 10px 12px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: var(--font-system);
    color: var(--color-text);
    background-color: #fff;
    width: 100%;
    box-sizing: border-box;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpolyline points='1 1 6 7 11 1' fill='none' stroke='%2364748b' stroke-width='2'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
    cursor: pointer;
}

.calc-group select:focus {
    border-color: var(--color-green);
    outline: 2px solid var(--color-green);
    outline-offset: 2px;
}

.calc-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background-color: var(--color-green);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 12px 20px;
    font-size: 0.95rem;
    font-weight: 700;
    font-family: var(--font-system);
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    width: 100%;
}

.calc-btn:hover {
    background-color: #16a34a;
}

.calc-btn:focus {
    outline: 3px solid var(--color-green);
    outline-offset: 2px;
}

.calc-btn:active {
    transform: scale(0.98);
}

.calc-result {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.result-placeholder {
    text-align: center;
    color: var(--color-text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.result-placeholder p {
    font-size: 0.88rem;
    max-width: 200px;
    line-height: 1.5;
}

.result-content {
    width: 100%;
}

.result-total {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-green);
    display: block;
    margin-bottom: 4px;
}

.result-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    display: block;
    margin-bottom: 16px;
}

.result-breakdown {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.result-breakdown li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    padding: 6px 0;
    border-bottom: 1px solid var(--color-border);
}

.result-breakdown li:last-child {
    border-bottom: none;
}

.result-breakdown .item-cost {
    font-weight: 700;
    color: var(--color-dark);
}

.result-breakdown .item-free {
    font-weight: 700;
    color: var(--color-green);
}

/* =========================================
   TRANSITIONS SECTION
   ========================================= */
.transition-blocks {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 28px 0;
}

.transition-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 2px solid var(--color-border);
    background-color: var(--color-surface);
}

.transition-card--t1 .transition-header {
    background-color: #dbeafe;
    border-bottom: 2px solid #93c5fd;
}

.transition-card--t2 .transition-header {
    background-color: #fce7f3;
    border-bottom: 2px solid #f9a8d4;
}

.transition-header {
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.transition-label {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background-color: var(--color-dark);
    color: #fff;
    font-size: 0.9rem;
    font-weight: 900;
    border-radius: 50%;
    flex-shrink: 0;
}

.transition-header h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-dark);
    margin: 0;
    flex: 1;
}

.transition-target {
    font-size: 0.78rem;
    font-weight: 700;
    color: #15803d;
    background-color: var(--color-green-light);
    padding: 3px 10px;
    border-radius: 100px;
    white-space: nowrap;
}

.transition-steps {
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.t-step {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.t-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background-color: var(--color-dark);
    color: var(--color-green);
    font-size: 0.75rem;
    font-weight: 800;
    border-radius: 50%;
    flex-shrink: 0;
}

.t-step p {
    font-size: 0.88rem;
    color: var(--color-text);
    line-height: 1.55;
    margin: 0;
}

/* =========================================
   MENTAL GRID
   ========================================= */
.mental-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin: 28px 0;
}

.mental-card {
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.mental-card:hover {
    border-color: var(--color-green);
    box-shadow: var(--shadow-sm);
}

.mental-icon {
    margin-bottom: 12px;
}

.mental-card h3 {
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--color-dark);
    margin: 0 0 8px;
}

.mental-card p {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin: 0;
}

/* =========================================
   FAQ ACCORDION
   ========================================= */
.faq-section {
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    margin: 48px 0;
}

.faq-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 28px;
}

.faq-header h2 {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--color-dark);
    margin: 0;
}

.accordion-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.accordion-item {
    border-bottom: 1px solid var(--color-border);
}

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

.accordion-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 18px 4px;
    cursor: pointer;
    user-select: none;
    list-style: none;
}

.accordion-trigger::-webkit-details-marker { display: none; }

.accordion-trigger:hover .accordion-preview,
.accordion-trigger:focus .accordion-preview {
    color: var(--color-green);
}

.accordion-trigger:focus {
    outline: 2px solid var(--color-green);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.accordion-preview {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-dark);
    transition: color 0.2s;
    line-height: 1.4;
}

.accordion-preview svg {
    flex-shrink: 0;
}

.accordion-arrow {
    flex-shrink: 0;
    color: var(--color-text-muted);
    transition: transform 0.2s;
}

.accordion-trigger[aria-expanded="false"] .accordion-arrow {
    transform: rotate(0deg);
}

.accordion-trigger[aria-expanded="true"] .accordion-arrow {
    transform: rotate(180deg);
}

.accordion-body {
    padding: 0 4px 18px;
}

.accordion-body[hidden] {
    display: none;
}

.accordion-body p {
    font-size: 0.92rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin: 0;
}

/* =========================================
   CTA SECTION
   ========================================= */
.article-cta {
    background-color: var(--color-dark);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    text-align: center;
    margin: 48px 0;
}

.cta-inner {
    max-width: 600px;
    margin: 0 auto;
}

.cta-icon {
    margin-bottom: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background-color: #27272a;
    border-radius: 50%;
}

.article-cta h2 {
    font-size: 1.6rem;
    font-weight: 800;
    color: #fff;
    margin: 0 0 14px;
    line-height: 1.3;
}

.article-cta p {
    font-size: 1rem;
    color: #94a3b8;
    line-height: 1.7;
    margin: 0 0 28px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 24px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 700;
    text-decoration: none;
    transition: background-color 0.2s, color 0.2s;
}

.cta-btn--primary {
    background-color: var(--color-green);
    color: #fff;
}

.cta-btn--primary:hover,
.cta-btn--primary:focus {
    background-color: #16a34a;
    outline: 3px solid var(--color-green);
    outline-offset: 2px;
}

.cta-btn--secondary {
    background-color: transparent;
    color: #fff;
    border: 2px solid #3d3d45;
}

.cta-btn--secondary:hover,
.cta-btn--secondary:focus {
    border-color: var(--color-green);
    color: var(--color-green);
    outline: 3px solid var(--color-green);
    outline-offset: 2px;
}

/* =========================================
   AUTHOR BIO
   ========================================= */
.author-bio-section {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background-color: var(--color-surface-alt);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin: 32px 0 0;
}

.author-bio-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--color-green);
    flex-shrink: 0;
    display: block;
}

.author-bio-content {
    flex: 1;
}

.author-bio-name {
    display: block;
    font-size: 1rem;
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: 6px;
}

.author-bio-desc {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    line-height: 1.65;
    margin: 0 0 14px;
}

.author-bio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.bio-tag {
    display: inline-block;
    background-color: var(--color-dark);
    color: var(--color-green);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 100px;
}

/* =========================================
   RESPONSIVE — MOBILE FIRST

   ========================================= */

/* ---------- Global mobile fix ---------- */
.timeline-section {
    grid-template-columns: 80px minmax(0, 1fr);
}

.timeline-content {
    min-width: 0;
    overflow: hidden;
}

/* ---------- Tablet (max-width: 768px) ---------- */
@media (max-width: 768px) {

    /* --- Timeline: stack vertically --- */
    .timeline-section {
        display: block;
        margin: 32px 0;
        padding-left: 0;
    }

    .timeline-section::before {
        display: none;
    }

    .timeline-marker {
        flex-direction: row;
        margin-bottom: 12px;
    }

    .timeline-content {
        padding-bottom: 0;
    }

    .timeline-content h2 {
        font-size: 1.25rem;
    }

    /* --- Container padding --- */
    .article-container {
        padding: 0 16px 40px;
    }

    .article-hero__inner {
        padding: 40px 16px 28px;
    }

    /* --- Equipment grid: single column --- */
    .equipment-grid {
        grid-template-columns: 1fr;
    }

    /* --- Calculator: single column --- */
    .calculator-body {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .calculator-header {
        padding: 20px;
    }

    .calc-result {
        min-height: auto;
    }

    /* --- Transitions: single column --- */
    .transition-blocks {
        grid-template-columns: 1fr;
    }

    /* --- Mental grid: single column --- */
    .mental-grid {
        grid-template-columns: 1fr;
    }

    /* --- Stats row: 2 columns --- */
    .stat-cards-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    /* --- Training phases schedule: single column --- */
    .phase-schedule {
        grid-template-columns: 1fr;
    }

    .phase-header {
        padding: 14px 16px;
    }

    .phase-body {
        padding: 16px;
    }

    /* --- Slider section --- */
    .interactive-slider-section {
        padding: 28px 16px;
        border-radius: var(--radius-md);
    }

    /* --- FAQ section --- */
    .faq-section {
        padding: 24px 16px;
    }

    /* --- CTA section --- */
    .article-cta {
        padding: 32px 20px;
        border-radius: var(--radius-md);
    }

    .article-cta h2 {
        font-size: 1.3rem;
    }

    /* --- Expert quote --- */
    .expert-quote {
        flex-direction: column;
        padding: 20px 16px;
    }

    /* --- Author bio --- */
    .author-bio-section {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 20px 16px;
    }

    .author-bio-tags {
        justify-content: center;
    }

    /* --- Checklist --- */
    .checklist-box {
        padding: 20px 16px;
    }

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

    /* --- Progress nav --- */
    .article-progress-nav {
        padding: 18px 16px;
    }

    .progress-list {
        flex-direction: column;
        gap: 6px;
    }

    /* --- Intro highlight / tip-box --- */
    .intro-highlight,
    .tip-box {
        padding: 14px 12px;
    }

    /* --- Nutrition timeline --- */
    .nutrition-timeline {
        padding-left: 24px;
    }

    /* --- Tables --- */
    .data-table {
        font-size: 0.8rem;
    }

    .data-table thead th {
        padding: 10px 10px;
        font-size: 0.7rem;
    }

    .data-table tbody td {
        padding: 10px 10px;
    }
}

/* ---------- Small mobile (max-width: 480px) ---------- */
@media (max-width: 480px) {

    .stat-cards-row {
        grid-template-columns: 1fr;
    }

    .article-hero__title {
        font-size: 1.5rem;
    }

    .article-hero__subtitle {
        font-size: 0.95rem;
    }

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

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

    .slider-title {
        font-size: 1.2rem;
    }

    .result-total {
        font-size: 2rem;
    }
}