:root {
    --text: #ffffff;
    --text-muted: #cbd7f8;

    --navy: #000817;
    --deep-navy: #010712;
    --card: rgba(3, 18, 48, 0.88);

    --blue: #64b4ff;
    --blue-light: #9bd2ff;
    --blue-dark: #0b4f9a;

    --border: rgba(255, 255, 255, 0.10);

    --shadow:
        0 25px 70px rgba(0, 0, 0, 0.30);
}


* {
    box-sizing: border-box;
}


html {
    scroll-behavior: smooth;
}


body {
    margin: 0;

    background:
        radial-gradient(
            circle at 15% 10%,
            rgba(80, 160, 255, 0.12),
            transparent 28%
        ),
        radial-gradient(
            circle at 85% 30%,
            rgba(50, 110, 255, 0.08),
            transparent 25%
        ),
        linear-gradient(
            180deg,
            #020814 0%,
            #000611 100%
        );

    color: var(--text);

    font-family:
        "Inter",
        "Poppins",
        sans-serif;

    min-height: 100vh;
}


body::before {
    content: "";

    position: fixed;

    inset: 0;

    pointer-events: none;

    background:
        linear-gradient(
            120deg,
            rgba(255,255,255,0.025),
            transparent 35%
        ),
        linear-gradient(
            240deg,
            rgba(100,180,255,0.035),
            transparent 30%
        );

    z-index: -1;
}


/* =========================
   HEADER
========================= */

header {
    position: sticky;

    top: 0;

    z-index: 1000;

    min-height: 78px;

    padding: 0 50px;

    display: flex;

    align-items: center;

    justify-content: space-between;

    background:
        rgba(0, 8, 23, 0.82);

    border-bottom:
        1px solid rgba(255,255,255,0.08);

    backdrop-filter: blur(20px);
}


.logo {
    display: flex;

    align-items: baseline;

    gap: 8px;
}


.logo h1 {
    margin: 0;

    font-family: "Poppins", sans-serif;

    font-size: 1.35rem;

    font-weight: 800;

    letter-spacing: -0.04em;
}


.logo span {
    color: var(--blue);

    font-size: 0.78rem;

    font-weight: 700;

    text-transform: uppercase;

    letter-spacing: 0.12em;
}


nav ul {
    display: flex;

    align-items: center;

    gap: 8px;

    list-style: none;

    margin: 0;

    padding: 0;
}


nav a {
    position: relative;

    display: block;

    padding: 10px 14px;

    color: var(--text-muted);

    text-decoration: none;

    font-size: 0.9rem;

    font-weight: 600;

    border-radius: 10px;

    transition:
        color 180ms ease,
        background 180ms ease,
        transform 180ms ease;
}


nav a:hover,
nav a.active {
    color: white;

    background:
        rgba(100, 180, 255, 0.09);
}


nav a.active::after {
    content: "";

    position: absolute;

    left: 14px;
    right: 14px;
    bottom: 4px;

    height: 2px;

    background: var(--blue);

    border-radius: 10px;
}


/* =========================
   MAIN
========================= */

main {
    width: min(1250px, calc(100% - 40px));

    margin: auto;

    padding:
        45px 0 80px;

    display: grid;

    gap: 35px;
}


section {
    position: relative;

    overflow: hidden;

    border:
        1px solid var(--border);

    border-radius: 30px;

    background:
        linear-gradient(
            145deg,
            rgba(10, 35, 84, 0.92),
            rgba(1, 7, 18, 0.97)
        );

    box-shadow: var(--shadow);
}


/* =========================
   HERO
========================= */

.hero {
    min-height: 600px;

    display: grid;

    grid-template-columns:
        1.1fr 0.9fr;

    align-items: center;

    padding: 75px;

    isolation: isolate;
}


.hero::before {
    content: "";

    position: absolute;

    width: 500px;

    height: 500px;

    right: -180px;

    top: -220px;

    background:
        radial-gradient(
            circle,
            rgba(74, 159, 255, 0.18),
            transparent 68%
        );

    filter: blur(20px);

    z-index: -1;
}


.hero-content {
    position: relative;

    z-index: 3;
}


.eyebrow,
.section-tag {
    display: inline-flex;

    align-items: center;

    gap: 9px;

    color: var(--blue-light);

    font-size: 0.72rem;

    font-weight: 800;

    letter-spacing: 0.14em;

    text-transform: uppercase;
}


.pulse-dot {
    width: 8px;

    height: 8px;

    border-radius: 50%;

    background: var(--blue);

    box-shadow:
        0 0 0 5px rgba(100,180,255,0.10),
        0 0 18px rgba(100,180,255,0.7);

    animation: pulse 2s infinite;
}


@keyframes pulse {

    0%,100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.35);
    }
}


.hero h2 {
    margin:
        25px 0 22px;

    max-width: 720px;

    font-family: "Poppins", sans-serif;

    font-size:
        clamp(3rem, 6vw, 5.8rem);

    line-height: 0.98;

    letter-spacing: -0.065em;
}


.hero h2 span {
    background:
        linear-gradient(
            90deg,
            #ffffff,
            #72bdff
        );

    -webkit-background-clip: text;

    background-clip: text;

    color: transparent;
}


.hero h2 strong {
    color: var(--blue);

    font-weight: 800;
}


.hero-description {
    max-width: 650px;

    color: var(--text-muted);

    font-size: 1.08rem;

    line-height: 1.8;
}


.hero-buttons {
    display: flex;

    flex-wrap: wrap;

    gap: 14px;

    margin-top: 32px;
}


.primary-btn,
.secondary-btn {
    display: inline-flex;

    align-items: center;

    gap: 12px;

    padding:
        14px 22px;

    border-radius: 999px;

    text-decoration: none;

    font-weight: 750;

    transition:
        transform 200ms ease,
        box-shadow 200ms ease;
}


.primary-btn {
    color: #eaf6ff;

    background:
        linear-gradient(
            135deg,
            rgba(100,180,255,0.95),
            rgba(20,77,145,0.95)
        );

    box-shadow:
        0 15px 40px rgba(49,151,255,0.25);
}


.primary-btn:hover {
    transform: translateY(-4px);

    box-shadow:
        0 22px 50px rgba(49,151,255,0.38);
}


.secondary-btn {
    color: white;

    border:
        1px solid rgba(255,255,255,0.14);

    background:
        rgba(255,255,255,0.05);
}


.secondary-btn:hover {
    transform: translateY(-4px);

    background:
        rgba(255,255,255,0.09);
}


/* =========================
   HERO VISUAL
========================= */

.hero-orbit {
    position: relative;

    height: 430px;

    display: flex;

    align-items: center;

    justify-content: center;
}


.orbit-circle {
    position: absolute;

    border:
        1px solid rgba(100,180,255,0.18);

    border-radius: 50%;
}


.orbit-one {
    width: 370px;

    height: 370px;

    animation:
        rotate 18s linear infinite;
}


.orbit-two {
    width: 250px;

    height: 250px;

    border-style: dashed;

    animation:
        rotate 12s linear infinite reverse;
}


@keyframes rotate {

    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}


.math-card {
    position: relative;

    width: 170px;

    height: 190px;

    display: flex;

    flex-direction: column;

    align-items: center;

    justify-content: center;

    gap: 10px;

    border:
        1px solid rgba(255,255,255,0.18);

    border-radius: 30px;

    background:
        linear-gradient(
            145deg,
            rgba(100,180,255,0.18),
            rgba(3,18,48,0.92)
        );

    box-shadow:
        0 30px 80px rgba(0,0,0,0.4),
        inset 0 1px rgba(255,255,255,0.1);

    backdrop-filter: blur(20px);

    z-index: 4;

    transform: rotate(-5deg);

    animation: float 4s ease-in-out infinite;
}


@keyframes float {

    0%,100% {
        transform: translateY(0) rotate(-5deg);
    }

    50% {
        transform: translateY(-12px) rotate(-3deg);
    }
}


.math-card span {
    font-family: serif;

    font-size: 5rem;

    color: var(--blue);

    text-shadow:
        0 0 35px rgba(100,180,255,0.5);
}


.math-card small {
    font-size: 0.7rem;

    letter-spacing: 0.25em;

    color: var(--text-muted);
}


.floating-symbol {
    position: absolute;

    display: flex;

    align-items: center;

    justify-content: center;

    width: 55px;

    height: 55px;

    border-radius: 17px;

    color: var(--blue-light);

    font-family: serif;

    font-size: 1.4rem;

    background:
        rgba(255,255,255,0.05);

    border:
        1px solid rgba(255,255,255,0.12);

    backdrop-filter: blur(10px);
}


.symbol-one {
    top: 45px;
    right: 50px;
}


.symbol-two {
    bottom: 55px;
    left: 45px;
}


.symbol-three {
    top: 110px;
    left: 35px;
}


/* =========================
   SECTION HEADING
========================= */

.section-heading {
    margin-bottom: 35px;
}


.section-heading.center {
    text-align: center;
}


.section-heading h2 {
    margin:
        12px 0 12px;

    font-family: "Poppins", sans-serif;

    font-size:
        clamp(2.2rem, 4vw, 3.7rem);

    line-height: 1.05;

    letter-spacing: -0.05em;
}


.section-heading h2 span {
    color: var(--blue);
}


.section-heading p {
    max-width: 650px;

    color: var(--text-muted);

    line-height: 1.7;

    margin: 0 auto;
}


/* =========================
   PROGRAMS
========================= */

#programs {
    padding: 65px;
}


.program-grid {
    display: grid;

    grid-template-columns:
        repeat(3, 1fr);

    gap: 18px;
}


.program-card {
    position: relative;

    min-height: 330px;

    padding: 30px;

    border-radius: 25px;

    background:
        rgba(1, 12, 32, 0.78);

    border:
        1px solid rgba(255,255,255,0.10);

    transition:
        transform 250ms ease,
        border-color 250ms ease,
        box-shadow 250ms ease;
}


.program-card:hover {
    transform: translateY(-8px);

    border-color:
        rgba(100,180,255,0.38);

    box-shadow:
        0 25px 60px rgba(0,0,0,0.28);
}


.program-card.featured {
    background:
        linear-gradient(
            145deg,
            rgba(19,68,130,0.55),
            rgba(1,12,32,0.92)
        );

    border-color:
        rgba(100,180,255,0.28);
}


.featured-label {
    position: absolute;

    top: 18px;

    right: 18px;

    padding: 6px 10px;

    border-radius: 999px;

    color: var(--blue-light);

    background:
        rgba(100,180,255,0.08);

    font-size: 0.6rem;

    font-weight: 800;

    letter-spacing: 0.1em;
}


.card-number {
    color:
        rgba(255,255,255,0.25);

    font-size: 0.75rem;

    font-weight: 800;

    letter-spacing: 0.1em;
}


.card-icon {
    width: 58px;

    height: 58px;

    margin:
        30px 0 20px;

    display: flex;

    align-items: center;

    justify-content: center;

    border-radius: 17px;

    color: var(--blue-light);

    font-weight: 800;

    background:
        rgba(100,180,255,0.09);

    border:
        1px solid rgba(100,180,255,0.18);
}


.program-card h3 {
    margin: 0 0 12px;

    font-family: "Poppins", sans-serif;

    font-size: 1.35rem;
}


.program-card p {
    color: var(--text-muted);

    line-height: 1.7;

    margin: 0;
}


.card-footer {
    position: absolute;

    bottom: 25px;

    left: 30px;

    right: 30px;

    display: flex;

    justify-content: space-between;

    color: var(--blue-light);

    font-size: 0.78rem;

    font-weight: 700;
}


/* =========================
   COVERAGE
========================= */

.coverage-section {
    padding: 65px;
}


.coverage-grid {
    display: grid;

    grid-template-columns:
        repeat(4, 1fr);

    gap: 15px;
}


.coverage-card {
    padding: 28px;

    min-height: 260px;

    border-radius: 22px;

    background:
        rgba(255,255,255,0.035);

    border:
        1px solid rgba(255,255,255,0.08);

    transition:
        transform 200ms ease,
        background 200ms ease;
}


.coverage-card:hover {
    transform: translateY(-6px);

    background:
        rgba(100,180,255,0.06);
}


.coverage-icon {
    margin-bottom: 50px;

    color: var(--blue);

    font-size: 0.8rem;

    font-weight: 800;
}


.coverage-card h3 {
    margin: 0 0 10px;

    font-size: 1.1rem;
}


.coverage-card p {
    margin: 0;

    color: var(--text-muted);

    line-height: 1.65;

    font-size: 0.92rem;
}


/* =========================
   PHILOSOPHY
========================= */

.philosophy {
    min-height: 550px;

    display: grid;

    grid-template-columns:
        1fr 0.8fr;

    align-items: center;

    gap: 50px;

    padding: 70px;
}


.philosophy-content h2 {
    margin:
        15px 0 25px;

    font-family: "Poppins", sans-serif;

    font-size:
        clamp(2.5rem, 5vw, 4.5rem);

    line-height: 1;

    letter-spacing: -0.06em;
}


.philosophy-content h2 span {
    color: var(--blue);
}


.philosophy-content > p {
    max-width: 650px;

    color: var(--text-muted);

    line-height: 1.8;
}


.quote-box {
    margin-top: 30px;

    padding: 25px;

    border-left:
        3px solid var(--blue);

    background:
        rgba(100,180,255,0.05);

    border-radius:
        0 20px 20px 0;
}


.quote-mark {
    color: var(--blue);

    font-family: serif;

    font-size: 3rem;

    line-height: 0;
}


.quote-box p {
    margin: 10px 0 0;

    color: white;

    font-weight: 600;

    line-height: 1.6;
}


/* =========================
   PHILOSOPHY VISUAL
========================= */

.philosophy-visual {
    position: relative;

    height: 420px;
}


.visual-card {
    position: absolute;

    width: 280px;

    height: 350px;

    border-radius: 30px;

    border:
        1px solid rgba(255,255,255,0.10);
}


.card-back {
    top: 35px;
    left: 90px;

    transform: rotate(12deg);

    background:
        rgba(30,80,140,0.25);
}


.card-middle {
    top: 25px;
    left: 55px;

    transform: rotate(6deg);

    background:
        rgba(100,180,255,0.08);
}


.card-front {
    top: 10px;
    left: 20px;

    padding: 35px;

    display: flex;

    flex-direction: column;

    justify-content: space-between;

    transform: rotate(-3deg);

    background:
        linear-gradient(
            145deg,
            rgba(20,65,125,0.65),
            rgba(1,10,28,0.96)
        );

    box-shadow:
        0 30px 80px rgba(0,0,0,0.35);
}


.formula {
    font-family: serif;

    font-size: 1.3rem;

    color: var(--blue-light);
}


.visual-line {
    height: 1px;

    background:
        rgba(255,255,255,0.15);
}


.visual-text {
    font-family: "Poppins", sans-serif;

    font-size: 2rem;

    font-weight: 800;

    line-height: 1.15;

    letter-spacing: -0.04em;
}


/* =========================
   EXPERIENCE
========================= */

.experience {
    padding: 65px;
}


.experience-grid {
    display: grid;

    grid-template-columns:
        repeat(4, 1fr);

    gap: 16px;
}


.experience-card {
    padding: 30px;

    border-radius: 24px;

    background:
        rgba(255,255,255,0.035);

    border:
        1px solid rgba(255,255,255,0.09);

    transition:
        transform 220ms ease,
        border-color 220ms ease;
}


.experience-card:hover {
    transform: translateY(-7px);

    border-color:
        rgba(100,180,255,0.35);
}


.experience-icon {
    font-size: 2rem;

    margin-bottom: 25px;
}


.experience-card h3 {
    margin: 0 0 10px;

    font-size: 1.05rem;
}


.experience-card p {
    margin: 0;

    color: var(--text-muted);

    line-height: 1.7;

    font-size: 0.9rem;
}


/* =========================
   LEARNING LOOP
========================= */

.learning-loop {
    padding: 65px;
}


.loop {
    display: flex;

    align-items: center;

    justify-content: center;

    gap: 15px;

    flex-wrap: wrap;
}


.loop-item {
    width: 190px;

    padding: 25px;

    border-radius: 22px;

    text-align: center;

    background:
        rgba(255,255,255,0.035);

    border:
        1px solid rgba(255,255,255,0.08);
}


.loop-number {
    margin: auto auto 15px;

    width: 42px;

    height: 42px;

    display: flex;

    align-items: center;

    justify-content: center;

    border-radius: 50%;

    color: var(--blue-light);

    background:
        rgba(100,180,255,0.08);

    font-size: 0.75rem;

    font-weight: 800;
}


.loop-item h3 {
    margin: 0 0 7px;
}


.loop-item p {
    margin: 0;

    color: var(--text-muted);

    font-size: 0.82rem;

    line-height: 1.5;
}


.loop-arrow {
    color: var(--blue);

    font-size: 1.5rem;
}


/* =========================
   CTA
========================= */

.cta {
    min-height: 430px;

    display: flex;

    align-items: center;

    justify-content: center;

    text-align: center;

    padding: 70px;

    background:
        radial-gradient(
            circle at center,
            rgba(40,120,220,0.18),
            transparent 55%
        ),
        linear-gradient(
            145deg,
            rgba(8,32,77,0.95),
            rgba(1,7,18,0.98)
        );
}


.cta-content {
    position: relative;

    max-width: 750px;

    z-index: 2;
}


.cta h2 {
    margin:
        18px 0;

    font-family: "Poppins", sans-serif;

    font-size:
        clamp(2.5rem, 5vw, 4.5rem);

    line-height: 1;

    letter-spacing: -0.06em;
}


.cta h2 span {
    color: var(--blue);
}


.cta p {
    max-width: 600px;

    margin:
        0 auto 30px;

    color: var(--text-muted);

    line-height: 1.8;
}


/* =========================
   CONTACT
========================= */

.contact-section {
    padding: 65px;
}


.contact-grid {
    display: grid;

    grid-template-columns:
        repeat(2, 1fr);

    gap: 15px;
}


.contact-card {
    display: flex;

    align-items: center;

    gap: 18px;

    padding: 24px;

    text-decoration: none;

    border-radius: 20px;

    color: white;

    background:
        rgba(255,255,255,0.035);

    border:
        1px solid rgba(255,255,255,0.09);

    transition:
        transform 200ms ease,
        background 200ms ease,
        border-color 200ms ease;
}


.contact-card:hover {
    transform: translateY(-5px);

    background:
        rgba(100,180,255,0.07);

    border-color:
        rgba(100,180,255,0.3);
}


.contact-icon {
    width: 55px;

    height: 55px;

    flex-shrink: 0;

    display: flex;

    align-items: center;

    justify-content: center;

    border-radius: 17px;

    background:
        rgba(100,180,255,0.09);

    font-size: 1.5rem;
}


.contact-card small {
    color: var(--blue-light);

    font-size: 0.65rem;

    font-weight: 800;

    letter-spacing: 0.12em;
}


.contact-card h3 {
    margin:
        4px 0;

    font-size: 1rem;
}


.contact-card p {
    margin: 0;

    color: var(--text-muted);

    font-size: 0.82rem;
}


.contact-arrow {
    margin-left: auto;

    color: var(--blue);

    font-size: 1.3rem;
}


/* =========================
   FOOTER
========================= */

footer {
    padding: 25px;

    text-align: center;

    color: var(--text-muted);

    font-size: 0.85rem;

    background:
        rgba(2,18,50,0.8);

    border-top:
        1px solid rgba(255,255,255,0.08);
}


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

@media (max-width: 1000px) {

    header {
        padding: 0 25px;
    }


    .hero {
        grid-template-columns: 1fr;

        padding: 55px;

        text-align: center;
    }


    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }


    .hero-buttons {
        justify-content: center;
    }


    .hero-orbit {
        height: 350px;
    }


    .program-grid {
        grid-template-columns:
            repeat(2, 1fr);
    }


    .coverage-grid,
    .experience-grid {
        grid-template-columns:
            repeat(2, 1fr);
    }


    .philosophy {
        grid-template-columns: 1fr;

        text-align: center;
    }


    .philosophy-content > p {
        margin-left: auto;
        margin-right: auto;
    }


    .philosophy-visual {
        max-width: 400px;

        width: 100%;

        margin: auto;
    }
}


@media (max-width: 720px) {

    header {
        min-height: auto;

        padding: 18px;

        flex-direction: column;

        gap: 15px;
    }


    .logo {
        width: 100%;

        justify-content: center;
    }


    nav {
        width: 100%;

        overflow-x: auto;
    }


    nav ul {
        width: max-content;

        margin: auto;
    }


    nav a {
        padding:
            8px 9px;

        font-size: 0.78rem;
    }


    main {
        width:
            calc(100% - 20px);

        padding-top: 20px;

        gap: 20px;
    }


    section {
        border-radius: 23px;
    }


    .hero,
    #programs,
    .coverage-section,
    .philosophy,
    .experience,
    .learning-loop,
    .contact-section,
    .cta {
        padding: 40px 24px;
    }


    .hero {
        min-height: auto;
    }


    .hero h2 {
        font-size:
            clamp(2.7rem, 14vw, 4rem);
    }


    .hero-orbit {
        transform:
            scale(0.8);

        margin:
            -30px 0;
    }


    .program-grid,
    .coverage-grid,
    .experience-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }


    .program-card {
        min-height: 310px;
    }


    .loop {
        flex-direction: column;
    }


    .loop-arrow {
        transform: rotate(90deg);
    }


    .philosophy-visual {
        transform:
            scale(0.85);

        margin:
            -25px auto;
    }


    .cta h2 {
        font-size: 2.6rem;
    }


    .contact-card {
        padding: 18px;
    }

}