/* ═══════════════════════════════════════════════════
   MODULE 8 · STEPS 3D — Light + Medallion numbers
   Design System v3.0 — zigzag staircase
   ═══════════════════════════════════════════════════ */

.steps-3d-scope {
    --color-bg: #faf8f6;
    --color-surface: #ffffff;
    --color-surface-2: #f5f2ef;
    --color-text: #1a1014;
    --color-text-soft: #4a3f44;
    --color-burg: #800020;
    --color-burg-dark: #5a0016;
    --color-gold: #a8782e;
    --color-gold-light: #c9a96e;
    --shadow-card: 0 2px 10px rgba(26, 16, 20, 0.06);
    --shadow-card-hover: 0 8px 28px rgba(26, 16, 20, 0.11);
    --shadow-number:
        0 0 0 4px var(--color-bg),
        0 0 0 5px rgba(168, 120, 46, 0.30),
        0 0 14px rgba(128, 0, 32, 0.12),
        0 4px 16px rgba(10, 3, 5, 0.25);
    --border-radius: 12px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1.125rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 1.75rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3.75rem;
    --spacing-3xl: 5rem;
    --ease: cubic-bezier(.4, 0, .2, 1);

    font-family: 'Roboto Condensed', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

.steps-3d-scope *,
.steps-3d-scope *::before,
.steps-3d-scope *::after {
    box-sizing: border-box;
}

.steps-3d-scope .steps-section {
    padding: var(--spacing-3xl) var(--spacing-md);
    background: transparent;
}

.steps-3d-scope .steps-stair {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5625rem;
    max-width: 900px;
    margin: 0 auto;
}

/* ── step cards — layered surface with accent bars ── */

.steps-3d-scope .step {
    width: 100%;
    background: var(--color-surface);
    border-radius: var(--border-radius);
    padding: 1.5rem 1.75rem 1.5rem calc(1.75rem + 4px);
    transition: transform 0.20s var(--ease),
                box-shadow 0.20s var(--ease);
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(128, 0, 32, 0.06);
    display: flex;
    align-items: center;
    gap: 1.75rem;
    position: relative;
    overflow: hidden;
    animation: stepEnter 0.8s both;
}

/* top accent bar — burg→gold gradient */
.steps-3d-scope .step::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(to right, var(--color-burg), var(--color-gold-light), transparent);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    opacity: 0.45;
    transition: opacity 0.20s var(--ease);
}

/* bottom 3D riser — refined gradient shadow */
.steps-3d-scope .step::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right,
        rgba(128, 0, 32, 0.18),
        rgba(168, 120, 46, 0.12),
        transparent 80%);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    opacity: 0.60;
    transition: opacity 0.20s var(--ease);
}

.steps-3d-scope .step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.steps-3d-scope .step:hover::before {
    opacity: 1;
}

.steps-3d-scope .step:hover::after {
    opacity: 1;
}

/* odd rows: reversed direction → mirror the gradients */
.steps-3d-scope .step:nth-child(odd) {
    flex-direction: row-reverse;
    padding: 1.5rem calc(1.75rem + 4px) 1.5rem 1.75rem;
}

.steps-3d-scope .step:nth-child(odd)::before {
    background: linear-gradient(to left, var(--color-burg), var(--color-gold-light), transparent);
}

.steps-3d-scope .step:nth-child(odd)::after {
    background: linear-gradient(to left,
        rgba(128, 0, 32, 0.18),
        rgba(168, 120, 46, 0.12),
        transparent 80%);
}

/* ── step number medallions — dark radial-gradient ── */

.steps-3d-scope .step-nr {
    flex-shrink: 0;
    width: 4.375rem;
    height: 4.375rem;
    border-radius: 50%;
    background: radial-gradient(circle at 38% 32%, #3a0a18, #110208);
    background-color: #110208;
    color: #ede4d8;
    font-family: 'Roboto Slab', Georgia, serif;
    font-size: 1.6rem;
    font-weight: 300;
    letter-spacing: 0.02em;
    display: grid;
    place-items: center;
    box-shadow: var(--shadow-number);
    transition: transform 0.20s var(--ease);
    position: relative;
    z-index: 1;
}

/* noise texture on medallion */
.steps-3d-scope .step-nr::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    opacity: 0.035;
    mix-blend-mode: overlay;
    pointer-events: none;
}

/* gold glow halo behind medallion */
.steps-3d-scope .step-nr::after {
    content: "";
    position: absolute;
    inset: -8px;
    border-radius: inherit;
    background: radial-gradient(circle, rgba(168, 120, 46, 0.10), transparent 70%);
    z-index: -1;
    pointer-events: none;
}

.steps-3d-scope .step:hover .step-nr {
    transform: scale(1.08);
}

/* ── step text — h3 Roboto Slab 300 + gold micro-separator ── */

.steps-3d-scope .step-txt h3 {
    font-family: 'Roboto Slab', Georgia, serif;
    font-weight: 300;
    font-size: 1.2rem;
    letter-spacing: 0.02em;
    margin: 0 0 var(--spacing-xs);
    color: var(--color-text);
    line-height: 1.3;
    text-align: left;
    position: relative;
    padding-bottom: 0.65rem;
}

/* gold micro-separator under h3 */
.steps-3d-scope .step-txt h3::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 36px;
    height: 1px;
    background: linear-gradient(to right, var(--color-gold), transparent);
}

/* odd rows: right-align text + mirror separator */
.steps-3d-scope .step:nth-child(odd) .step-txt h3 {
    text-align: right;
}

.steps-3d-scope .step:nth-child(odd) .step-txt h3::after {
    left: auto;
    right: 0;
    background: linear-gradient(to left, var(--color-gold), transparent);
}

.steps-3d-scope .step-txt p {
    margin: 0;
    color: var(--color-text-soft);
    font-size: 1.05rem;
    line-height: 1.55;
    text-align: left;
}

.steps-3d-scope .step:nth-child(odd) .step-txt p {
    text-align: right;
}

/* ── staggered animation delays ── */

.steps-3d-scope .step:nth-child(1)  { animation-delay: 0.1s; }
.steps-3d-scope .step:nth-child(2)  { animation-delay: 0.18s; }
.steps-3d-scope .step:nth-child(3)  { animation-delay: 0.26s; }
.steps-3d-scope .step:nth-child(4)  { animation-delay: 0.34s; }
.steps-3d-scope .step:nth-child(5)  { animation-delay: 0.42s; }
.steps-3d-scope .step:nth-child(6)  { animation-delay: 0.50s; }
.steps-3d-scope .step:nth-child(7)  { animation-delay: 0.58s; }
.steps-3d-scope .step:nth-child(8)  { animation-delay: 0.66s; }
.steps-3d-scope .step:nth-child(9)  { animation-delay: 0.74s; }
.steps-3d-scope .step:nth-child(10) { animation-delay: 0.82s; }

@keyframes stepEnter {
    from {
        transform: translateY(2.5rem);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ═══════════════════════════════════════════════════
   MOBILE — glassmorphism
   ═══════════════════════════════════════════════════ */

@media (max-width: 768px) {
    .steps-3d-scope .steps-section {
        padding: var(--spacing-2xl) var(--spacing-md);
        background: transparent;
    }

    .steps-3d-scope .steps-stair {
        gap: 1.25rem;
        width: 100%;
    }

    /* ── step cards → glass ── */
    .steps-3d-scope .step {
        flex-direction: column;
        text-align: left;
        padding: var(--spacing-xl) 1.5rem 1.75rem;
        width: 100%;
        max-width: 26.25rem;
        margin: 0 auto;
        background: rgba(255, 255, 255, 0.18);
        backdrop-filter: blur(16px) saturate(160%);
        -webkit-backdrop-filter: blur(16px) saturate(160%);
        border: 1px solid rgba(255, 255, 255, 0.40);
        box-shadow:
            0 8px 32px rgba(0, 0, 0, 0.08),
            inset 0 1px 0 rgba(255, 255, 255, 0.50);
    }

    .steps-3d-scope .step:hover {
        transform: none;
    }

    /* top accent bar — softer on glass, always left→right */
    .steps-3d-scope .step::before {
        background: linear-gradient(to right, var(--color-burg), var(--color-gold-light), transparent);
        opacity: 0.35;
    }

    /* bottom 3D riser — subtle on glass */
    .steps-3d-scope .step::after {
        background: linear-gradient(to right,
            rgba(128, 0, 32, 0.10),
            rgba(168, 120, 46, 0.06),
            transparent 80%);
        opacity: 0.50;
    }

    .steps-3d-scope .step:nth-child(odd) {
        flex-direction: column;
        padding: var(--spacing-xl) 1.5rem 1.75rem;
    }

    .steps-3d-scope .step:nth-child(odd)::before {
        background: linear-gradient(to right, var(--color-burg), var(--color-gold-light), transparent);
    }

    .steps-3d-scope .step:nth-child(odd)::after {
        background: linear-gradient(to right,
            rgba(128, 0, 32, 0.10),
            rgba(168, 120, 46, 0.06),
            transparent 80%);
    }

    /* ── medallion numbers — adjust ring for glass bg ── */
    .steps-3d-scope .step-nr {
        margin-bottom: var(--spacing-sm);
        box-shadow:
            0 0 0 4px rgba(255, 255, 255, 0.50),
            0 0 0 5px rgba(168, 120, 46, 0.25),
            0 0 14px rgba(128, 0, 32, 0.10),
            0 4px 12px rgba(10, 3, 5, 0.18);
    }

    /* ── text → dark, left-aligned ── */
    .steps-3d-scope .step-txt h3,
    .steps-3d-scope .step:nth-child(odd) .step-txt h3 {
        text-align: left;
        color: var(--color-text);
    }

    .steps-3d-scope .step-txt h3::after,
    .steps-3d-scope .step:nth-child(odd) .step-txt h3::after {
        left: 0;
        right: auto;
        background: linear-gradient(to right, var(--color-gold), transparent);
    }

    .steps-3d-scope .step-txt p,
    .steps-3d-scope .step:nth-child(odd) .step-txt p {
        text-align: left;
        color: #4a3f44;
    }
}