/* ============================================================
   AI Design Sprint® - Service Subpage
   ============================================================ */

/* ===== HERO ===== */
.sprint-hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--purple-deeper) 0%, var(--purple) 50%, var(--purple-light) 100%);
    color: var(--white);
    padding: 140px 0 80px;
    position: relative;
    overflow: hidden;
}

.sprint-hero .hero-particles {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.sprint-hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
    max-width: 820px;
    margin: 0 auto;
}

.sprint-hero-content {
    color: var(--white);
}

.sprint-breadcrumb {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    margin-bottom: 24px;
    transition: var(--transition);
}
.sprint-breadcrumb:hover {
    color: var(--gold);
    transform: translateX(-3px);
}

.sprint-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 195, 0, 0.15);
    border: 1px solid rgba(255, 195, 0, 0.4);
    color: var(--gold);
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 24px;
}

.sprint-hero-title {
    font-size: clamp(2.4rem, 5.2vw, 4rem);
    color: var(--white);
    line-height: 1.12;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
}

.sprint-hero-accent {
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sprint-hero-subtitle {
    font-size: 1.18rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.7;
    margin-bottom: 36px;
    max-width: 580px;
}

.sprint-hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px 28px;
    margin-top: 32px;
}
.sprint-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.92rem;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
}
.sprint-meta-item svg {
    color: var(--gold);
    flex-shrink: 0;
}

/* Hero visual */
.sprint-hero-visual {
    display: flex;
    justify-content: center;
}
.sprint-hero-card {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.03) 100%);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-lg);
    padding: 28px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    width: 100%;
    max-width: 440px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.3);
}
.sprint-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 20px;
}
.sprint-card-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.25);
}
.sprint-card-dot:nth-child(1) { background: #FF5F57; }
.sprint-card-dot:nth-child(2) { background: #FEBC2E; }
.sprint-card-dot:nth-child(3) { background: #28C840; }
.sprint-card-title {
    margin-left: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 0.05em;
}
.sprint-card-steps {
    list-style: none;
    padding: 0;
    margin: 0 0 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.sprint-card-steps li {
    display: flex;
    align-items: center;
    gap: 14px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 14px 16px;
    color: var(--white);
    font-weight: 500;
    font-size: 0.98rem;
    transition: var(--transition);
}
.sprint-card-steps li:hover {
    background: rgba(255, 195, 0, 0.1);
    border-color: rgba(255, 195, 0, 0.3);
    transform: translateX(4px);
}
.sprint-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: rgba(255, 195, 0, 0.2);
    color: var(--gold);
    font-weight: 700;
    font-size: 0.82rem;
}
.sprint-card-footer {
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.sprint-card-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--gold);
    font-weight: 600;
    margin-bottom: 4px;
}
.sprint-card-value {
    font-size: 0.92rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.5;
}

/* ===== WHY ===== */
.sprint-why-section {
    background: var(--white);
}
.sprint-why-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}
.sprint-why-card {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    transition: var(--transition);
}
.sprint-why-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
    background: var(--white);
}
.sprint-why-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(55, 12, 123, 0.1), rgba(55, 12, 123, 0.02));
    color: var(--purple);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}
.sprint-why-icon svg { width: 26px; height: 26px; }
.sprint-why-card h3 {
    font-size: 1.2rem;
    color: var(--purple-dark);
    margin-bottom: 12px;
    line-height: 1.35;
}
.sprint-why-card p {
    color: var(--gray-500);
    line-height: 1.65;
    font-size: 0.97rem;
    margin: 0;
}

/* ===== PROCESS ===== */
.sprint-process-section {
    background: var(--gray-50);
}
.sprint-process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 48px;
}
.sprint-process-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 32px 26px;
    position: relative;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.sprint-process-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(55, 12, 123, 0.2);
}
.sprint-process-card-optional {
    background: linear-gradient(180deg, #FEFBF1 0%, var(--white) 100%);
    border-color: rgba(255, 195, 0, 0.35);
}
.sprint-process-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.sprint-process-num {
    font-size: 2.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--purple) 0%, var(--purple-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}
.sprint-process-card-optional .sprint-process-num {
    background: linear-gradient(135deg, var(--gold-dark) 0%, var(--gold) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.sprint-process-time {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--gray-500);
    background: var(--gray-100);
    padding: 5px 11px;
    border-radius: 999px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}
.sprint-process-card-optional .sprint-process-time {
    background: rgba(255, 195, 0, 0.18);
    color: var(--gold-dark);
}
.sprint-process-card h3 {
    font-size: 1.15rem;
    color: var(--purple-dark);
    margin-bottom: 12px;
    line-height: 1.3;
}
.sprint-process-card p {
    color: var(--gray-500);
    line-height: 1.6;
    font-size: 0.93rem;
    margin: 0 0 18px;
    flex-grow: 1;
}
.sprint-process-out {
    list-style: none;
    padding: 16px 0 0;
    margin: 0;
    border-top: 1px solid var(--gray-200);
}
.sprint-process-out li {
    font-size: 0.85rem;
    color: var(--purple);
    font-weight: 500;
    padding: 5px 0;
    padding-left: 18px;
    position: relative;
}
.sprint-process-out li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 11px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gold);
}

/* ===== DELIVERABLES ===== */
.sprint-deliverables-section {
    background: var(--white);
}

/* Hero prototype card */
.sprint-prototype-card {
    background: linear-gradient(135deg, var(--purple-deeper) 0%, var(--purple) 55%, var(--purple-light) 100%);
    border-radius: var(--radius-lg);
    padding: 48px 48px 52px;
    margin: 48px 0 0;
    position: relative;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(55, 12, 123, 0.25);
    color: var(--white);
}
.sprint-prototype-card::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 195, 0, 0.18), transparent 65%);
    pointer-events: none;
}
.sprint-prototype-card::after {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(90, 45, 160, 0.5), transparent 65%);
    pointer-events: none;
}
.sprint-prototype-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 195, 0, 0.18);
    border: 1px solid rgba(255, 195, 0, 0.4);
    color: var(--gold);
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 28px;
    position: relative;
    z-index: 1;
}
.sprint-prototype-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}
.sprint-prototype-content h3 {
    color: var(--white);
    font-size: clamp(1.6rem, 3.2vw, 2.2rem);
    line-height: 1.2;
    margin-bottom: 20px;
}
.sprint-prototype-lead {
    color: rgba(255, 255, 255, 0.88);
    font-size: 1.08rem;
    line-height: 1.7;
    margin-bottom: 28px;
}
.sprint-prototype-benefits {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.sprint-prototype-benefits li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: rgba(255, 255, 255, 0.92);
    font-size: 0.98rem;
    line-height: 1.55;
}
.sprint-prototype-benefits svg {
    width: 20px;
    height: 20px;
    color: var(--gold);
    flex-shrink: 0;
    margin-top: 2px;
}

/* AI process flow visual */
.sprint-flow {
    position: relative;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.02) 100%);
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--radius-lg);
    padding: 36px 24px 56px;
    display: grid;
    grid-template-columns: 1fr auto 1.2fr auto 1fr;
    gap: 14px;
    align-items: center;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
    color: var(--white);
}

.sprint-flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 8px;
    position: relative;
    z-index: 1;
}
.sprint-flow-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.18);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.sprint-flow-icon svg {
    width: 22px;
    height: 22px;
}
.sprint-flow-icon-output {
    background: var(--gold);
    border-color: var(--gold);
    color: var(--purple-dark);
    box-shadow: 0 8px 24px rgba(255, 195, 0, 0.35);
}
.sprint-flow-label {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: 0.04em;
}
.sprint-flow-sub {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.4;
    max-width: 130px;
}

/* AI center node */
.sprint-flow-step-ai {
    gap: 10px;
}
.sprint-flow-ai-ring {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    background: conic-gradient(from 0deg, var(--gold), rgba(255, 195, 0, 0.2), var(--gold));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    animation: sprint-ring-spin 8s linear infinite;
}
.sprint-flow-ai-ring::before {
    content: '';
    position: absolute;
    inset: 4px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--purple-deeper) 0%, var(--purple) 100%);
}
.sprint-flow-ai-core {
    position: relative;
    z-index: 1;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(255, 195, 0, 0.12);
    border: 1px solid rgba(255, 195, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold);
    animation: sprint-ai-pulse 2.6s ease-in-out infinite;
}
.sprint-flow-ai-core svg {
    width: 32px;
    height: 32px;
}
@keyframes sprint-ring-spin {
    to { transform: rotate(360deg); }
}
@keyframes sprint-ai-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(255, 195, 0, 0.4); }
    50% { box-shadow: 0 0 0 14px rgba(255, 195, 0, 0); }
}
.sprint-flow-chips {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 5px;
    margin-top: 4px;
}
.sprint-flow-chips span {
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--gold);
    background: rgba(255, 195, 0, 0.12);
    border: 1px solid rgba(255, 195, 0, 0.25);
    padding: 3px 8px;
    border-radius: 999px;
}

/* Pipes with travelling pulses */
.sprint-flow-pipe {
    height: 2px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 195, 0, 0.4) 50%, rgba(255, 255, 255, 0.1) 100%);
    position: relative;
    overflow: hidden;
    min-width: 28px;
    align-self: center;
}
.sprint-flow-pulse {
    position: absolute;
    top: 50%;
    left: 0;
    width: 14px;
    height: 14px;
    margin-top: -7px;
    border-radius: 50%;
    background: var(--gold);
    box-shadow: 0 0 12px var(--gold);
    transform: translateX(-100%);
    animation: sprint-flow-pulse 2.2s linear infinite;
}
.sprint-flow-pulse:nth-child(2) { animation-delay: 0.7s; }
.sprint-flow-pulse:nth-child(3) { animation-delay: 1.4s; }
@keyframes sprint-flow-pulse {
    0% { transform: translateX(-30%) scale(0.4); opacity: 0; }
    20% { opacity: 1; }
    80% { opacity: 1; }
    100% { transform: translateX(calc(100% + 30px)) scale(0.4); opacity: 0; }
}

/* Human-in-the-loop ribbon */
.sprint-flow-human {
    position: absolute;
    bottom: 14px;
    left: 50%;
    transform: translateX(-50%);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.7rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.75);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    padding: 5px 12px;
    border-radius: 999px;
    letter-spacing: 0.04em;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.sprint-flow-human svg {
    color: var(--gold);
}
/* (Supporting deliverable cards removed) */

/* ===== METHOD ===== */
.sprint-method-section {
    background: linear-gradient(135deg, var(--purple-deeper) 0%, var(--purple) 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}
.sprint-method-section::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 195, 0, 0.12), transparent 70%);
    pointer-events: none;
}
.sprint-method-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}
.sprint-method-content h2 {
    color: var(--white);
    font-size: clamp(1.8rem, 3.5vw, 2.4rem);
    line-height: 1.25;
    margin: 16px 0 24px;
}
.section-label-light {
    color: var(--gold) !important;
}
.sprint-method-lead {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.05rem;
    line-height: 1.75;
    margin-bottom: 18px;
}
.sprint-method-list {
    list-style: none;
    padding: 0;
    margin: 28px 0 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.sprint-method-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: rgba(255, 255, 255, 0.92);
    line-height: 1.55;
    font-size: 0.98rem;
}
.sprint-method-list svg {
    width: 20px;
    height: 20px;
    color: var(--gold);
    flex-shrink: 0;
    margin-top: 2px;
}

/* Method intro + outro */
.sprint-method-intro {
    max-width: 820px;
    margin: 0 auto 56px;
    text-align: center;
}
.sprint-method-intro h2 {
    color: var(--white);
    font-size: clamp(1.8rem, 3.6vw, 2.5rem);
    line-height: 1.2;
    margin: 16px 0 24px;
}
.sprint-method-intro .sprint-method-lead {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
    max-width: 720px;
}
.sprint-method-intro .sprint-method-lead strong {
    color: var(--gold);
    font-weight: 600;
}
.sprint-method-outro {
    max-width: 920px;
    margin: 60px auto 0;
}
.sprint-method-outro .sprint-method-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px 32px;
    margin: 0;
}

/* Capability cards hint */
.sprint-cards-hint {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.82rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    margin: 0 0 22px;
    text-align: center;
}
.sprint-cards-hint svg {
    color: var(--gold);
}

/* Capability cards grid (12 flip cards) */
.sprint-cards-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
    position: relative;
    z-index: 1;
    perspective: 1400px;
}

/* The flip wrapper (acts as the card surface from the outside) */
.sprint-cap-card {
    position: relative;
    aspect-ratio: 3 / 4;
    border: 0;
    background: transparent;
    padding: 0;
    cursor: pointer;
    font-family: inherit;
    text-align: left;
    -webkit-tap-highlight-color: transparent;
    outline: none;
}
.sprint-cap-card:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 4px;
    border-radius: var(--radius-md);
}

/* Inner wrapper handles the 3D flip, leaves outer free for fade-in animation */
.sprint-cap-inner {
    position: absolute;
    inset: 0;
    transform-style: preserve-3d;
    transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.sprint-cap-card.is-flipped .sprint-cap-inner {
    transform: rotateY(180deg);
}

/* Faces (front + back) share size, are absolutely stacked */
.sprint-cap-face {
    position: absolute;
    inset: 0;
    border-radius: var(--radius-md);
    padding: 22px 20px 24px;
    color: var(--white);
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow: hidden;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

/* FRONT */
.sprint-cap-front {
    background: linear-gradient(160deg, var(--card-color) 0%, var(--card-color-dark) 100%);
}
.sprint-cap-front::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 80% 0%, rgba(255, 255, 255, 0.22), transparent 55%);
    pointer-events: none;
}
.sprint-cap-front::after {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -10%;
    width: 140%;
    height: 80%;
    background: radial-gradient(ellipse at 50% 100%, rgba(0, 0, 0, 0.25), transparent 60%);
    pointer-events: none;
}

/* BACK */
.sprint-cap-back {
    background: linear-gradient(170deg, var(--card-color-dark) 0%, #0d0820 100%);
    transform: rotateY(180deg);
    padding: 18px 18px 20px;
    gap: 8px;
}
.sprint-cap-back::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-md);
    background:
        linear-gradient(170deg, rgba(255, 255, 255, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 100% 0%, rgba(255, 255, 255, 0.12), transparent 50%);
    pointer-events: none;
}
.sprint-cap-back-eyebrow {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.65);
    position: relative;
    z-index: 1;
}
.sprint-cap-back h4 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--white);
    line-height: 1.25;
    margin: 0 0 6px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
    position: relative;
    z-index: 1;
}
.sprint-cap-back ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow-y: auto;
    position: relative;
    z-index: 1;
    flex: 1 1 auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.3) transparent;
}
.sprint-cap-back ul::-webkit-scrollbar {
    width: 4px;
}
.sprint-cap-back ul::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.25);
    border-radius: 4px;
}
.sprint-cap-back li {
    font-size: 0.88rem;
    line-height: 1.45;
    color: rgba(255, 255, 255, 0.96);
    padding-left: 14px;
    position: relative;
}
.sprint-cap-back li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--gold);
}

/* Front content */
.sprint-cap-cat {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.75);
    position: relative;
    z-index: 1;
}
.sprint-cap-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.18);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: auto;
    margin-bottom: 4px;
    position: relative;
    z-index: 1;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.sprint-cap-icon svg {
    width: 22px;
    height: 22px;
}
.sprint-cap-front h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    line-height: 1.25;
    margin: 0;
    position: relative;
    z-index: 1;
}
.sprint-cap-front p {
    font-size: 0.78rem;
    line-height: 1.45;
    color: rgba(255, 255, 255, 0.88);
    margin: 0;
    position: relative;
    z-index: 1;
}
.sprint-cap-flip-hint {
    position: absolute;
    top: 16px;
    right: 14px;
    font-size: 0.62rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.65);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    z-index: 2;
}
.sprint-cap-flip-hint::after {
    content: '\21BB';
    font-size: 0.78rem;
    transform: translateY(-1px);
}
.sprint-cap-card:not(.is-flipped) .sprint-cap-front:hover .sprint-cap-flip-hint {
    color: var(--white);
}

/* Hover lift only on front (via inner so it doesn't fight animate-on-scroll) */
.sprint-cap-card:not(.is-flipped):hover .sprint-cap-inner {
    transform: translateY(-6px);
}
.sprint-cap-card:not(.is-flipped):hover .sprint-cap-face {
    box-shadow: 0 24px 50px rgba(0, 0, 0, 0.35);
}

/* Attribution */
.sprint-attribution {
    margin: 56px auto 0;
    max-width: 880px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 195, 0, 0.25);
    border-radius: var(--radius-md);
    padding: 24px 28px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: relative;
}
.sprint-attribution-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-dark) 100%);
    color: var(--purple-dark);
    display: flex;
    align-items: center;
    justify-content: center;
}
.sprint-attribution-icon svg {
    width: 22px;
    height: 22px;
}
.sprint-attribution-text {
    color: rgba(255, 255, 255, 0.92);
    font-size: 0.95rem;
    line-height: 1.65;
}
.sprint-attribution-text strong {
    color: var(--white);
    font-weight: 600;
}
.sprint-attribution-text a {
    color: var(--gold);
    text-decoration: underline;
    font-weight: 600;
}

/* Registered symbol styling */
.sprint-reg {
    font-size: 0.45em;
    vertical-align: super;
    font-weight: 500;
    margin-left: 2px;
    opacity: 0.85;
}

/* ===== AUDIENCE ===== */
.sprint-audience-section {
    background: var(--white);
}
.sprint-audience-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 48px;
}
.sprint-audience-card {
    background: var(--gray-50);
    border-left: 4px solid var(--purple);
    border-radius: var(--radius-md);
    padding: 28px 30px;
    transition: var(--transition);
}
.sprint-audience-card:hover {
    border-left-color: var(--gold);
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}
.sprint-audience-card h3 {
    font-size: 1.15rem;
    color: var(--purple-dark);
    margin-bottom: 8px;
}
.sprint-audience-card p {
    color: var(--gray-500);
    line-height: 1.6;
    font-size: 0.95rem;
    margin: 0;
}

/* ===== WHY ME ===== */
.sprint-why-me-section {
    background: var(--gray-50);
}
.sprint-why-me-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
}
.sprint-why-me-content h2 {
    color: var(--purple-dark);
    font-size: clamp(1.8rem, 3.5vw, 2.4rem);
    line-height: 1.25;
    margin: 16px 0 24px;
}
.sprint-why-me-lead {
    color: var(--gray-600);
    font-size: 1.05rem;
    line-height: 1.75;
    margin-bottom: 18px;
}
.sprint-credentials {
    list-style: none;
    padding: 0;
    margin: 28px 0 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.sprint-credentials li {
    display: flex;
    align-items: center;
    gap: 14px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    padding: 14px 18px;
    color: var(--purple-dark);
    font-weight: 500;
    font-size: 0.97rem;
}
.sprint-credentials svg {
    width: 20px;
    height: 20px;
    color: var(--gold);
    flex-shrink: 0;
}

.sprint-photo-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: relative;
}
.sprint-photo-card img {
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    display: block;
}
.sprint-photo-caption {
    padding: 22px 26px;
    background: linear-gradient(135deg, var(--purple-deeper) 0%, var(--purple) 100%);
    color: var(--white);
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.sprint-photo-caption strong {
    font-size: 1.05rem;
    font-weight: 600;
}
.sprint-photo-caption span {
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.75);
}

/* ===== FINAL CTA ===== */
.sprint-cta-section {
    background: var(--white);
}
.sprint-cta-card {
    background: linear-gradient(135deg, var(--purple-deeper) 0%, var(--purple) 60%, var(--purple-light) 100%);
    color: var(--white);
    border-radius: var(--radius-lg);
    padding: 64px 48px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}
.sprint-cta-card::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -10%;
    width: 480px;
    height: 480px;
    background: radial-gradient(circle, rgba(255, 195, 0, 0.18), transparent 70%);
    pointer-events: none;
}
.sprint-cta-card::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(90, 45, 160, 0.4), transparent 70%);
    pointer-events: none;
}
.sprint-cta-card > * {
    position: relative;
    z-index: 1;
}
.sprint-cta-card h2 {
    color: var(--white);
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    margin: 16px 0 16px;
}
.sprint-cta-card p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.08rem;
    margin: 0 auto 36px;
    max-width: 620px;
    line-height: 1.7;
}
.sprint-cta-card .hero-cta-group {
    justify-content: center;
    margin-bottom: 0;
}
.sprint-method-credit {
    margin-top: 32px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.65);
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}
.sprint-method-credit a {
    color: var(--gold);
    text-decoration: underline;
}

/* ===== NAV ACTIVE ===== */
.nav-active {
    color: var(--gold) !important;
}
.navbar.scrolled .nav-active {
    color: var(--purple) !important;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .sprint-hero-grid,
    .sprint-method-grid,
    .sprint-why-me-grid,
    .sprint-prototype-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    .sprint-hero-visual,
    .sprint-method-visual,
    .sprint-why-me-visual {
        order: -1;
    }
    .sprint-prototype-card {
        padding: 40px 32px;
    }
    .sprint-flow {
        padding: 30px 18px 56px;
    }
    .sprint-flow-step-ai .sprint-flow-ai-ring {
        width: 84px;
        height: 84px;
    }
    .sprint-flow-step-ai .sprint-flow-ai-core {
        width: 56px;
        height: 56px;
    }
    .sprint-flow-step-ai .sprint-flow-ai-core svg {
        width: 28px;
        height: 28px;
    }
    .sprint-process-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .sprint-why-grid {
        grid-template-columns: 1fr;
    }
    .sprint-cards-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    .sprint-attribution {
        flex-direction: column;
        gap: 16px;
    }
}

@media (max-width: 768px) {
    .sprint-hero {
        padding: 120px 0 60px;
        min-height: auto;
    }
    .sprint-hero-meta {
        flex-direction: column;
        gap: 12px;
    }
    .sprint-process-grid,
    .sprint-audience-grid {
        grid-template-columns: 1fr;
    }
    .sprint-prototype-card {
        padding: 32px 24px;
    }
    .sprint-flow {
        grid-template-columns: 1fr;
        padding: 28px 20px 56px;
        gap: 18px;
    }
    .sprint-flow-pipe {
        width: 2px;
        height: 36px;
        min-width: 0;
        justify-self: center;
        background: linear-gradient(180deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 195, 0, 0.4) 50%, rgba(255, 255, 255, 0.1) 100%);
    }
    .sprint-flow-pulse {
        top: 0;
        left: 50%;
        margin-top: 0;
        margin-left: -7px;
        transform: translateY(-100%);
        animation: sprint-flow-pulse-v 2.2s linear infinite;
    }
    @keyframes sprint-flow-pulse-v {
        0% { transform: translate(-50%, -30%) scale(0.4); opacity: 0; }
        20% { opacity: 1; }
        80% { opacity: 1; }
        100% { transform: translate(-50%, calc(36px + 30px)) scale(0.4); opacity: 0; }
    }
    .sprint-cards-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .sprint-method-outro .sprint-method-list {
        grid-template-columns: 1fr;
    }
    .sprint-cta-card {
        padding: 48px 28px;
    }
}