.matrix-body { min-height: 100vh; background: radial-gradient(circle at 85% 12%, rgba(29, 233, 182, .16), transparent 27%), #f4f7fb; }
.matrix-main { padding: 72px 0 100px; }
.matrix-hero { display: grid; grid-template-columns: minmax(0, .85fr) minmax(420px, 1fr); gap: 72px; align-items: center; }
.matrix-hero h1 { margin: 12px 0 22px; color: var(--ink); font-size: clamp(48px, 6vw, 82px); line-height: .95; letter-spacing: -.06em; }
.matrix-hero h1 span { color: var(--green-dark); }
.matrix-form, .matrix-results { padding: 34px; border: 1px solid rgba(0, 24, 97, .12); border-radius: 24px; background: #fff; box-shadow: 0 22px 70px rgba(0, 24, 97, .1); }
.matrix-form > label:not(.matrix-drop), .matrix-results > label { display: block; margin: 22px 0 8px; color: var(--ink); font-size: 13px; font-weight: 700; }
.matrix-form > input { width: 100%; box-sizing: border-box; padding: 14px 16px; border: 1px solid #cbd4e2; border-radius: 10px; color: var(--ink); font: 600 15px Montserrat, sans-serif; }
.matrix-form > button, .matrix-actions button { border: 0; border-radius: 10px; background: var(--ink); color: #fff; font: 700 14px Montserrat, sans-serif; cursor: pointer; }
.matrix-form > button { width: 100%; margin-top: 18px; padding: 16px; background: var(--green-dark); color: var(--ink); }
.matrix-form button:disabled { cursor: wait; opacity: .65; }
.matrix-form > p { margin: 14px 0 0; color: #647187; font-size: 12px; text-align: center; }
.matrix-drop { display: grid; place-items: center; min-height: 190px; padding: 24px; border: 2px dashed #aebbd0; border-radius: 16px; background: #f7f9fc; cursor: pointer; text-align: center; }
.matrix-drop:hover, .matrix-drop:focus-within { border-color: var(--green-dark); background: rgba(29, 233, 182, .07); }
.matrix-drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.matrix-drop strong { max-width: 100%; margin: 14px 0 5px; overflow: hidden; color: var(--ink); font-size: 16px; text-overflow: ellipsis; white-space: nowrap; }
.matrix-drop small { color: #718096; }
.matrix-file-icon { display: grid; width: 48px; height: 56px; place-items: center; border-radius: 5px 13px 5px 5px; background: var(--green-dark); color: var(--ink); font-weight: 800; }
.matrix-results { margin-top: 56px; }
.matrix-summary { display: flex; justify-content: space-between; gap: 32px; align-items: center; }
.matrix-summary h2 { margin: 5px 0 0; color: var(--ink); font-size: 34px; }
.matrix-counts { display: flex; gap: 12px; }
.matrix-counts span { min-width: 150px; padding: 16px; border-radius: 12px; background: #f3f6fa; }
.matrix-counts strong, .matrix-counts small { display: block; }
.matrix-counts strong { color: var(--ink); font-size: 26px; }
.matrix-counts small { margin-top: 4px; color: #68758b; font-size: 10px; }
.matrix-actions { display: flex; gap: 10px; margin: 28px 0 20px; }
.matrix-actions button { padding: 12px 16px; }
.matrix-actions button:first-child { background: var(--green-dark); color: var(--ink); }
#matrixOutput { width: 100%; min-height: 480px; box-sizing: border-box; padding: 20px; border: 0; border-radius: 12px; background: #081536; color: #dce6ff; font: 13px/1.6 Consolas, monospace; resize: vertical; }
.matrix-instructions { margin-top: 56px; padding: 42px; border-radius: 24px; background: var(--ink); color: #fff; box-shadow: 0 22px 70px rgba(0, 24, 97, .16); }
.matrix-instructions-heading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .65fr); gap: 8px 48px; align-items: end; }
.matrix-instructions-heading .eyebrow { grid-column: 1 / -1; color: var(--green-dark); }
.matrix-instructions-heading h2 { margin: 0; font-size: clamp(28px, 4vw, 46px); line-height: 1.05; letter-spacing: -.04em; }
.matrix-instructions-heading > p:last-child { margin: 0; color: #acb9d2; line-height: 1.7; }
.matrix-instructions ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; margin: 36px 0 0; padding: 1px; list-style: none; background: rgba(255, 255, 255, .12); }
.matrix-instructions li { display: grid; grid-template-columns: 48px 1fr; gap: 16px; min-height: 125px; padding: 24px; background: var(--ink); }
.matrix-instructions li > span { color: var(--green-dark); font-size: 13px; font-weight: 800; }
.matrix-instructions strong { display: block; margin-bottom: 8px; font-size: 15px; }
.matrix-instructions li p { margin: 0; color: #acb9d2; font-size: 13px; line-height: 1.65; }
.matrix-instructions code { padding: 2px 5px; border-radius: 4px; background: rgba(255, 255, 255, .1); color: #fff; font: 12px Consolas, monospace; }
@media (max-width: 900px) { .matrix-hero { grid-template-columns: 1fr; gap: 40px; }.matrix-summary { align-items: flex-start; flex-direction: column; } }
@media (max-width: 760px) { .matrix-instructions-heading, .matrix-instructions ol { grid-template-columns: 1fr; }.matrix-instructions-heading .eyebrow { grid-column: auto; }.matrix-instructions-heading > p:last-child { margin-top: 10px; } }
@media (max-width: 620px) { .matrix-main { padding-top: 44px; }.matrix-form, .matrix-results, .matrix-instructions { padding: 22px; }.matrix-counts, .matrix-actions { width: 100%; flex-direction: column; }.matrix-counts span { min-width: 0; }.matrix-actions button { width: 100%; }.matrix-instructions li { grid-template-columns: 36px 1fr; padding: 20px 14px; } }