/**
 * Makine kodu öğrenme diyagramı — Katman 0 konu haritası
 * Orta veri yolu + çift kolon düğümler + SVG bağlantılar (JS)
 */

.mcd-root {
    position: relative;
    margin-top: 2.5rem;
    padding: clamp(1.5rem, 3vw, 2.25rem);
    border-radius: 22px;
    background: linear-gradient(165deg,
            rgba(8, 10, 22, 0.88) 0%,
            rgba(16, 14, 36, 0.82) 50%,
            rgba(6, 14, 32, 0.9) 100%);
    border: 1px solid rgba(124, 156, 255, 0.22);
    box-shadow:
        0 24px 64px rgba(0, 0, 0, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    overflow: hidden;
}

.mcd-root::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% 0%, rgba(167, 139, 250, 0.12), transparent 55%),
        radial-gradient(ellipse 60% 40% at 10% 80%, rgba(56, 189, 248, 0.08), transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.mcd-head {
    position: relative;
    z-index: 2;
    margin-bottom: 1.75rem;
    max-width: 52rem;
}

.mcd-head-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(186, 230, 253, 0.85);
    margin-bottom: 0.5rem;
}

.mcd-head-kicker i {
    color: #7dd3fc;
    font-size: 0.85rem;
}

.mcd-head-title {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: clamp(1.15rem, 2vw, 1.45rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #f1f5f9;
    margin: 0 0 0.5rem;
}

.mcd-head-title span {
    background: linear-gradient(135deg, #a5f3fc, #c4b5fd);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.mcd-head-desc {
    margin: 0;
    font-size: 0.92rem;
    line-height: 1.65;
    color: rgba(180, 185, 212, 0.95);
}

.mcd-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(72px, 96px) minmax(0, 1fr);
    grid-template-rows: auto;
    gap: clamp(0.75rem, 2vw, 1.25rem);
    align-items: stretch;
    align-content: start;
    min-height: 420px;
}

.mcd-col-left {
    grid-column: 1;
    grid-row: 1;
}

.mcd-bus {
    grid-column: 2;
    grid-row: 1;
}

.mcd-col-right {
    grid-column: 3;
    grid-row: 1;
}

.mcd-wires {
    position: absolute;
    grid-column: 1 / -1;
    grid-row: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    min-height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: visible;
}

.mcd-wires path {
    fill: none;
    stroke: url(#mcdWireStroke);
    stroke-width: 2;
    stroke-linecap: round;
    opacity: 0.85;
    filter: drop-shadow(0 0 6px rgba(56, 189, 248, 0.35));
}

.mcd-wires.mcd-wires--static path {
    stroke-dasharray: none;
}

@media (prefers-reduced-motion: no-preference) {
    .mcd-wires path.mcd-wire-anim {
        stroke-dasharray: 8 6;
        animation: mcdWireFlow 1.2s linear infinite;
    }
}

@keyframes mcdWireFlow {
    to {
        stroke-dashoffset: -14;
    }
}

.mcd-col {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.mcd-bus {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    align-self: stretch;
    padding: 0.5rem 0;
}

.mcd-bus-cap {
    font-size: 0.62rem;
    font-weight: 800;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(199, 210, 254, 0.75);
    margin-bottom: 0.35rem;
}

.mcd-bus-line {
    flex: 1;
    width: 5px;
    min-height: 200px;
    border-radius: 999px;
    background: linear-gradient(180deg,
            rgba(56, 189, 248, 0.15) 0%,
            rgba(167, 139, 250, 0.55) 35%,
            rgba(56, 189, 248, 0.45) 70%,
            rgba(99, 102, 241, 0.35) 100%);
    box-shadow:
        0 0 20px rgba(167, 139, 250, 0.45),
        0 0 40px rgba(56, 189, 248, 0.2),
        inset 0 0 12px rgba(255, 255, 255, 0.12);
}

.mcd-bus-foot {
    margin-top: 0.5rem;
    font-size: 0.65rem;
    font-weight: 600;
    color: rgba(148, 163, 184, 0.9);
    text-align: center;
    line-height: 1.35;
    max-width: 6rem;
}

.mcd-node {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.85rem 1rem;
    align-items: flex-start;
    padding: 1rem 1.1rem;
    text-decoration: none;
    color: inherit;
    border-radius: 16px;
    background: linear-gradient(150deg,
            rgba(22, 26, 48, 0.92) 0%,
            rgba(12, 14, 28, 0.94) 100%);
    border: 1px solid rgba(124, 156, 255, 0.16);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
    transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.mcd-node:hover,
.mcd-node:focus-visible {
    transform: translateY(-2px);
    border-color: rgba(167, 139, 250, 0.45);
    box-shadow:
        0 12px 36px rgba(0, 0, 0, 0.4),
        0 0 24px rgba(124, 156, 255, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.06);
    outline: none;
}

.mcd-node-icon {
    width: 46px;
    height: 46px;
    min-width: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    font-size: 1.1rem;
    color: #ecfeff;
    background: linear-gradient(145deg,
            rgba(56, 189, 248, 0.22) 0%,
            rgba(99, 102, 241, 0.28) 55%,
            rgba(167, 139, 250, 0.2) 100%);
    border: 1px solid rgba(125, 211, 252, 0.35);
    box-shadow:
        0 6px 18px rgba(0, 0, 0, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.mcd-node:hover .mcd-node-icon,
.mcd-node:focus-visible .mcd-node-icon {
    box-shadow:
        0 8px 22px rgba(56, 189, 248, 0.25),
        inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.mcd-node-body {
    min-width: 0;
}

.mcd-node-step {
    display: block;
    font-size: 0.62rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(167, 189, 250, 0.85);
    margin-bottom: 0.2rem;
}

.mcd-node-title {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #f8fafc;
    margin: 0 0 0.35rem;
    line-height: 1.25;
}

.mcd-node-desc {
    margin: 0;
    font-size: 0.82rem;
    line-height: 1.55;
    color: rgba(180, 185, 212, 0.95);
}

.mcd-node-code {
    display: inline-block;
    margin-top: 0.45rem;
    padding: 0.2rem 0.45rem;
    border-radius: 6px;
    font-family: ui-monospace, 'Cascadia Code', 'Fira Code', Consolas, monospace;
    font-size: 0.68rem;
    font-weight: 600;
    color: #a5f3fc;
    background: rgba(6, 8, 18, 0.65);
    border: 1px solid rgba(56, 189, 248, 0.2);
}

/* —— Katman 1 köprüsü (premium kart + ikon) —— */
.l0-bridge-premium .l0-bridge-grid {
    gap: 1.1rem;
}

.l0-bridge-card-premium {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.75rem 1rem;
    align-items: flex-start;
    padding: 1.25rem 1.2rem;
    text-decoration: none;
    color: inherit;
    border-radius: 16px;
    background: linear-gradient(155deg,
            rgba(18, 20, 38, 0.95) 0%,
            rgba(8, 10, 22, 0.92) 100%);
    border: 1px solid rgba(124, 156, 255, 0.18);
    box-shadow:
        0 14px 40px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.l0-bridge-card-premium:hover,
.l0-bridge-card-premium:focus-visible {
    transform: translateY(-2px);
    border-color: rgba(196, 181, 253, 0.4);
    box-shadow:
        0 18px 48px rgba(0, 0, 0, 0.45),
        0 0 28px rgba(124, 156, 255, 0.1);
    outline: none;
}

.l0-bridge-card-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    font-size: 1.15rem;
    color: #f0f9ff;
    background: linear-gradient(145deg,
            rgba(124, 156, 255, 0.25) 0%,
            rgba(167, 139, 250, 0.22) 100%);
    border: 1px solid rgba(196, 181, 253, 0.35);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
}

.l0-bridge-card-premium:hover .l0-bridge-card-icon {
    box-shadow: 0 8px 22px rgba(167, 139, 250, 0.25);
}

.l0-bridge-card-main {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.l0-bridge-card-premium .l0-bridge-card-kicker {
    margin: 0;
}

.l0-bridge-card-premium .l0-bridge-card-title {
    margin: 0;
    font-size: 1.05rem;
}

.l0-bridge-card-premium .l0-bridge-card-desc {
    margin: 0;
}

.l0-bridge-card-premium .l0-bridge-card-meta {
    margin-top: 0.35rem;
}

@media (max-width: 900px) {
    .mcd-inner {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
        min-height: 0;
    }

    .mcd-bus {
        grid-column: 1;
        grid-row: 1;
        flex-direction: row;
        justify-content: center;
        padding: 0.75rem 0;
    }

    .mcd-bus-line {
        width: min(320px, 100%);
        height: 5px;
        min-height: 0;
        min-width: 120px;
    }

    .mcd-wires {
        display: none;
    }

    .mcd-col-left {
        grid-column: 1;
        grid-row: 2;
    }

    .mcd-col-right {
        grid-column: 1;
        grid-row: 3;
        margin-top: 0.5rem;
    }
}