@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    --bg: #050b16;
    --panel: #0a1525;
    --text: #e8f0fa;
    --muted: #8191a8;
    --line: #18324e;
    --accent: #19c7b7;
    --accent2: #0b9e98;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background:
        radial-gradient(circle at 72% 20%, rgba(25, 199, 183, .1), transparent 26rem),
        radial-gradient(circle at 15% 70%, rgba(16, 79, 128, .12), transparent 30rem),
        var(--bg);
    color: var(--text);
    font-family: Inter, system-ui, sans-serif;
    line-height: 1.6;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: .38;
    background-image:
        linear-gradient(rgba(64, 105, 139, .16) 1px, transparent 1px),
        linear-gradient(90deg, rgba(64, 105, 139, .16) 1px, transparent 1px);
    background-size: 120px 120px;
    z-index: -1;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font: inherit;
}

.site-shell {
    width: min(1560px, calc(100% - 48px));
    margin: auto;
    position: relative;
}


/* =========================================================
   NAVIGATION — HOMEPAGE BRANDING
   ========================================================= */

.nav-wrap {
    padding-top: 24px;
    position: relative;
    z-index: 10;
}

.nav {
    min-height: 82px;
    padding: 0 18px 0 30px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(7, 17, 30, .82);
    backdrop-filter: blur(18px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 35px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex: 0 0 auto;
}

.brand-mark {
    width: 42px;
    height: 42px;
    object-fit: contain;
    display: block;
}

.brand-accent {
    color: var(--accent);
}

.brand-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.brand-name {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -.3px;
    color: #f2f5f8;
}

.brand-tagline {
    margin-top: 3px;
    font-size: 10px;
    font-weight: 400;
    line-height: 1.2;
    color: #d6dce3;
    letter-spacing: .05px;
}

.content-tabs {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    margin: 0;
    padding: 0;
    flex: 1;
}

.content-tabs a {
    color: #9aacc2;
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    padding: 9px 11px;
    border-radius: 7px;
    transition: all .2s ease;
    white-space: nowrap;
}

.content-tabs a:hover {
    color: #fff;
    background: #0d9f9f;
}

.content-tabs a.active {
    color: #f4f8fc;
    background: rgba(25, 199, 183, .08);
}

.mobile-topic-menu {
    display: none;
}


/* =========================================================
   DEEP LEARNING HERO
   ========================================================= */

.deep-hero {
    padding: 105px 0 0;
    border-bottom: 1px solid rgba(24, 50, 78, .65);
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 6px 14px;
    border: 1px solid rgba(25, 199, 183, .35);
    border-radius: 999px;
    color: var(--accent);
    font: 500 12px/1 "DM Mono", monospace;
    letter-spacing: .13em;
}

.eyebrow span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(360px, .82fr) minmax(0, 1.55fr);
    gap: 70px;
    align-items: stretch;
    padding: 48px 0 0;
}

.hero-copy {
    padding: 10px 0 50px;
}

.hero-copy h1 {
    max-width: 850px;
    margin: 20px 0 25px;
    font-size: clamp(3.5rem, 6.2vw, 6.8rem);
    line-height: .94;
    letter-spacing: -.075em;
    font-weight: 800;
}

.hero-copy h1 strong {
    color: var(--accent);
}

.hero-copy > p {
    max-width: 690px;
    margin: 0;
    color: var(--muted);
    font-size: 1.08rem;
    line-height: 1.75;
}

.hero-rule {
    width: 45px;
    height: 1px;
    margin: 30px 0 20px;
    background: var(--accent);
}

.hero-sequence {
    display: flex;
    flex-direction: column;
    gap: 6px;
    color: #617b92;
    font: 500 10px/1.5 "DM Mono", monospace;
    letter-spacing: .14em;
}

.hero-sequence span:first-child {
    color: var(--accent);
}


/* =========================================================
   PATH SELECTOR
   ========================================================= */

.path-selector {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.path-card {
    min-height: 520px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 13px;
    background:
        radial-gradient(circle at 75% 35%, rgba(25, 199, 183, .08), transparent 12rem),
        rgba(8, 20, 34, .72);
    color: var(--text);
    text-align: left;
    cursor: pointer;
    transition:
        transform .22s ease,
        border-color .22s ease,
        box-shadow .22s ease,
        background .22s ease;
}

.path-card:hover {
    transform: translateY(-5px);
    border-color: rgba(25, 199, 183, .45);
    box-shadow: 0 20px 55px rgba(0, 0, 0, .20);
}

.path-card.is-selected {
    border-color: var(--accent);
    background:
        radial-gradient(circle at 75% 35%, rgba(25, 199, 183, .13), transparent 14rem),
        linear-gradient(145deg, rgba(10, 53, 62, .72), rgba(8, 20, 34, .85));
    box-shadow: 0 0 0 1px rgba(25, 199, 183, .08);
}

.card-number {
    color: var(--accent);
    font: 500 11px "DM Mono", monospace;
    letter-spacing: .08em;
}

.company-name {
    margin-top: 42px;
    color: #6e8298;
    font: 500 10px "DM Mono", monospace;
    letter-spacing: .13em;
}

.path-card h2 {
    margin: 8px 0 14px;
    font-size: clamp(2rem, 3vw, 3rem);
    line-height: 1;
    letter-spacing: -.055em;
}
/* =========================================================
   DEEP LEARNING — PATH CARD BACKGROUND IMAGES
   ========================================================= */

.path-card-ibm,
.path-card-google,
.path-card-microsoft {
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

/* Full-card image */
.path-card-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    z-index: 0;
    overflow: hidden;
    border: none;
    border-radius: 0;
}

.path-card-image img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: center;
}

/* Dark cinematic overlay */
.path-card-ibm::after,
.path-card-google::after,
.path-card-microsoft::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;

    background:
        linear-gradient(
            180deg,
            rgba(5, 11, 22, .30) 0%,
            rgba(5, 11, 22, .12) 32%,
            rgba(5, 11, 22, .60) 70%,
            rgba(5, 11, 22, .94) 100%
        );
}

/* Keep card content above the image */
.path-card-ibm > *:not(.path-card-image),
.path-card-google > *:not(.path-card-image),
.path-card-microsoft > *:not(.path-card-image) {
    position: relative;
    z-index: 2;
}

/* Keep the image locked to the full card */
.path-card-ibm > .path-card-image,
.path-card-google > .path-card-image,
.path-card-microsoft > .path-card-image {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.path-card p {
    margin: 0;
    color: var(--muted);
    font: 500 10px/1.8 "DM Mono", monospace;
    letter-spacing: .08em;
}

.path-card-action {
    display: inline-flex;
    align-items: center;
    margin-top: auto;
    padding-top: 28px;
    color: var(--accent);
    font-size: 13px;
    font-weight: 700;
}

.path-card-action b {
    margin-left: 12px;
    font-size: 19px;
    font-weight: 500;
    transition: transform .2s ease;
}

.path-card:hover .path-card-action b {
    transform: translateX(4px);
}

.selection-prompt {
    min-height: 88px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    color: #607b92;
    font: 500 10px "DM Mono", monospace;
    letter-spacing: .14em;
}

.selection-prompt span {
    color: var(--accent);
    font-size: 25px;
}


/* =========================================================
   PATH DETAILS
   ========================================================= */

.path-details {
    scroll-margin-top: 30px;
}

.path-details-inner {
    padding: 72px 0 110px;
}

.path-panel {
    padding: 36px;
    border: 1px solid var(--line);
    border-radius: 15px;
    background:
        radial-gradient(circle at 90% 10%, rgba(25, 199, 183, .07), transparent 20rem),
        rgba(8, 20, 34, .72);
    animation: revealPath .35s ease both;
}

.path-panel[hidden] {
    display: none;
}

@keyframes revealPath {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.path-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 30px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--line);
}

.panel-kicker,
.section-label,
.journey-row > div > span {
    color: var(--accent);
    font: 500 10px "DM Mono", monospace;
    letter-spacing: .14em;
}

.panel-kicker span {
    margin-left: 8px;
    color: #617b92;
}

.path-panel-header h2 {
    margin: 17px 0 12px;
    font-size: clamp(2rem, 4vw, 4rem);
    line-height: 1;
    letter-spacing: -.06em;
}

.path-panel-header h2 strong {
    color: var(--accent);
}

.path-panel-header p {
    max-width: 760px;
    margin: 0;
    color: var(--muted);
    font-size: .98rem;
    line-height: 1.7;
}

.panel-status {
    flex: 0 0 auto;
    padding: 8px 11px;
    border: 1px solid rgba(25, 199, 183, .24);
    color: #7190a7;
    font: 500 9px "DM Mono", monospace;
    letter-spacing: .1em;
}

.panel-status i {
    display: inline-block;
    width: 6px;
    height: 6px;
    margin-right: 7px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 12px rgba(25, 199, 183, .6);
}

.path-panel-grid {
    display: grid;
    grid-template-columns: minmax(230px, .7fr) minmax(0, 1.7fr);
    gap: 40px;
    padding: 38px 0;
}

.roadmap-column {
    min-width: 0;
}

.roadmap {
    margin-top: 23px;
}

.roadmap-step {
    display: grid;
    grid-template-columns: 38px 1fr;
    column-gap: 12px;
    align-items: start;
}

.roadmap-step span {
    width: 31px;
    height: 31px;
    display: grid;
    place-items: center;
    border: 1px solid var(--accent);
    border-radius: 50%;
    color: var(--text);
    font: 500 10px "DM Mono", monospace;
}

.roadmap-step strong {
    padding-top: 3px;
    color: #dce7f0;
    font-size: 13px;
}

.roadmap-step small {
    grid-column: 2;
    margin-top: 3px;
    color: #667e96;
    font-size: 11px;
    line-height: 1.5;
}

.roadmap-line {
    width: 1px;
    height: 25px;
    margin: 4px 0 4px 15px;
    background: #27516c;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.info-card {
    min-width: 0;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(5, 14, 26, .65);
}

.info-number {
    color: var(--accent);
    font: 500 10px "DM Mono", monospace;
    letter-spacing: .08em;
}

.info-card h3 {
    margin: 25px 0 17px;
    color: #dfe9f2;
    font-size: 1.05rem;
    letter-spacing: -.02em;
}

.info-card ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.info-card li {
    position: relative;
    padding-left: 15px;
    color: var(--muted);
    font-size: .79rem;
    line-height: 1.45;
}

.info-card li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--accent);
}

.info-note {
    margin: 18px 0 0;
    padding-top: 15px;
    border-top: 1px solid rgba(24, 50, 78, .7);
    color: #627a91;
    font-size: .68rem;
    line-height: 1.55;
}

.pros-cons > h3 {
    margin-bottom: 16px;
}

.pros,
.cons {
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.pros strong,
.cons strong {
    font: 500 9px "DM Mono", monospace;
    letter-spacing: .12em;
}

.pros strong {
    color: var(--accent);
}

.cons {
    margin-top: 23px;
    padding-top: 19px;
    border-top: 1px solid rgba(24, 50, 78, .7);
}

.cons strong {
    color: #d88778;
}

.pros span,
.cons span {
    color: var(--muted);
    font-size: .74rem;
    line-height: 1.45;
}

.pros span::before {
    content: "✓";
    margin-right: 7px;
    color: var(--accent);
}

.cons span::before {
    content: "•";
    margin-right: 7px;
    color: #d88778;
}

.journey-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    padding-top: 27px;
    border-top: 1px solid var(--line);
}

.journey-row > div {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.journey-row > div strong {
    color: #dce7f0;
    font-size: 1rem;
}

.journey-button {
    display: inline-flex;
    align-items: center;
    gap: 22px;
    min-height: 52px;
    padding: 0 22px;
    border: 1px solid var(--accent);
    border-radius: 8px;
    color: var(--accent);
    background: rgba(25, 199, 183, .035);
    font-size: 13px;
    font-weight: 700;
    transition: background .2s ease, color .2s ease;
}

.journey-button b {
    font-size: 19px;
    font-weight: 500;
}

.journey-button:hover {
    background: var(--accent);
    color: #031016;
}


/* =========================================================
   CLOSING CAREER NOTE
   ========================================================= */

.career-note {
    padding: 0 0 115px;
}

.career-note-inner {
    padding: 55px 60px;
    border-top: 1px solid rgba(25, 199, 183, .18);
    border-bottom: 1px solid rgba(25, 199, 183, .18);
    background:
        radial-gradient(circle at 85% 50%, rgba(25, 199, 183, .08), transparent 25rem);
}

.career-note h2 {
    margin: 24px 0 18px;
    font-size: clamp(2.4rem, 5vw, 5rem);
    line-height: 1;
    letter-spacing: -.065em;
}

.career-note h2 strong {
    color: var(--accent);
}

.career-note p {
    max-width: 850px;
    margin: 0;
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.75;
}


/* =========================================================
   FOOTER — HOMEPAGE BRANDING
   ========================================================= */

footer {
    margin-top: 30px;
    border-top: 1px solid var(--line);
    color: #61738a;
    font-size: .85rem;
}

.footer-social {
    padding: 38px 0 40px;
}

.footer-social h3 {
    margin: 0 0 22px;
    color: #d4dde8;
    font-size: 1rem;
    font-weight: 500;
}

.footer-social-links {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.footer-social-links a {
    width: fit-content;
    color: #8da0b6;
    font-weight: 500;
    transition: color .2s ease;
}

.footer-social-links a:hover {
    color: var(--accent);
}

.footer-main {
    padding: 40px 0 45px;
    border-top: 1px solid var(--line);
    display: grid;
    grid-template-columns: 1.4fr 1fr 1.4fr;
    gap: 70px;
}

.footer-brand-column {
    max-width: 320px;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #d4dde8;
    font-weight: 800;
    letter-spacing: .12em;
}

.footer-brand .brand-mark {
    width: 40px;
    height: 40px;
}

.footer-brand-column p {
    margin: 16px 0 0;
    color: #61738a;
    line-height: 1.6;
}

.footer-column {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 13px;
}

.footer-column h4 {
    margin: 0 0 8px;
    color: #d4dde8;
    font-size: .9rem;
    font-weight: 600;
}

.footer-column a {
    color: #71859c;
    transition: color .2s ease;
}

.footer-column a:hover {
    color: var(--accent);
}

.footer-bottom {
    padding: 25px 0 35px;
    border-top: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 25px;
}

.footer-legal {
    display: flex;
    gap: 25px;
}

.footer-legal a {
    color: #71859c;
    transition: color .2s ease;
}

.footer-legal a:hover {
    color: var(--accent);
}


/* =========================================================
   RESPONSIVE
   ========================================================= */

@media (max-width: 1100px) {

    .content-tabs {
        gap: 2px;
    }

    .content-tabs a {
        padding: 9px 7px;
        font-size: 11px;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 45px;
    }

    .hero-copy {
        max-width: 850px;
    }

    .path-selector {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .path-panel-grid {
        grid-template-columns: 1fr;
    }

    .roadmap {
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 10px;
        align-items: start;
    }

    .roadmap-line {
        width: auto;
        height: 1px;
        margin: 15px 0 0;
    }

    .roadmap-step {
        display: block;
        text-align: center;
    }

    .roadmap-step span {
        margin: 0 auto 10px;
    }

    .roadmap-step strong,
    .roadmap-step small {
        display: block;
        padding: 0;
    }
}

@media (max-width: 820px) {

    .site-shell {
        width: min(100% - 28px, 1560px);
    }

    .nav {
        padding-left: 17px;
    }

    .content-tabs {
        display: none;
    }

    .mobile-topic-menu {
        display: block;
        margin-top: 12px;
        border: 1px solid #1a3a5c;
        border-radius: 12px;
        overflow: hidden;
        background: rgba(5, 11, 22, .92);
    }

    .mobile-topic-menu summary {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 15px 18px;
        color: var(--text);
        font-size: .92rem;
        font-weight: 700;
        cursor: pointer;
        list-style: none;
    }

    .mobile-topic-menu summary::-webkit-details-marker {
        display: none;
    }

    .mobile-topic-arrow {
        color: var(--accent);
        font-size: 1.15rem;
    }

    .mobile-topic-menu[open] .mobile-topic-arrow {
        transform: rotate(180deg);
    }

    .mobile-topic-links {
        border-top: 1px solid #1a3a5c;
    }

    .mobile-topic-links a {
        display: block;
        padding: 15px 18px;
        color: var(--text);
        font-size: .9rem;
        line-height: 1.35;
        border-bottom: 1px solid rgba(26, 58, 92, .6);
    }

    .mobile-topic-links a:last-child {
        border-bottom: none;
    }

    .deep-hero {
        padding-top: 65px;
    }

    .path-selector {
        grid-template-columns: 1fr;
    }

    .path-card {
        min-height: 290px;
    }

    .path-panel-header {
        flex-direction: column;
    }

    .panel-status {
        align-self: flex-start;
    }

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

    .journey-row {
        align-items: flex-start;
        flex-direction: column;
    }

    .journey-button {
        width: 100%;
        justify-content: center;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 18px;
    }
}

@media (max-width: 600px) {

    .nav {
        min-height: 72px;
    }

    .brand-mark {
        width: 38px;
        height: 38px;
    }

    .brand-name {
        font-size: 16px;
    }

    .brand-tagline {
        font-size: 8px;
    }

    .deep-hero {
        padding-top: 52px;
    }

    .hero-grid {
        padding-top: 35px;
    }

    .hero-copy h1 {
        font-size: clamp(3rem, 15vw, 4.5rem);
    }

    .hero-copy > p {
        font-size: .98rem;
    }

    .path-card {
        padding: 24px;
    }

    .selection-prompt {
        text-align: center;
        line-height: 1.5;
    }

    .path-details-inner {
        padding: 45px 0 75px;
    }

    .path-panel {
        padding: 23px 18px;
    }

    .path-panel-header h2 {
        font-size: 2.4rem;
    }

    .roadmap {
        display: block;
    }

    .roadmap-line {
        width: 1px;
        height: 23px;
        margin: 5px 0 5px 15px;
    }

    .roadmap-step {
        display: grid;
        grid-template-columns: 38px 1fr;
        text-align: left;
    }

    .roadmap-step span {
        margin: 0;
    }

    .roadmap-step strong {
        padding-top: 3px;
    }

    .roadmap-step small {
        padding-left: 0;
    }

    .career-note-inner {
        padding: 38px 24px;
    }

    .career-note h2 {
        font-size: 2.5rem;
    }

    .footer-social {
        padding-top: 30px;
    }
}
/* =========================================================
   PATH CARD — TEXT POSITIONING OVER BACKGROUND
   ========================================================= */

/* Move company name + main heading upward */
.path-card .company-name {
    position: relative;
    top: -40px;
}

.path-card h2 {
    position: relative;
    top: -40px;
}

/* Move descriptive text downward */
.path-card p {
    position: relative;
    top: 280px;
}