* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: Inter, Arial, Helvetica, sans-serif;
    background: #f6f9ff;
    color: #10234d;
    line-height: 1.6;
}

:root {
    --blue: #034da2;
    --dark: #031b43;
    --navy: #061d45;
    --light: #edf6ff;
    --purple: #7556e8;
    --cyan: #12cce5;
    --white: #ffffff;
}

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

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(3,27,67,.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255,255,255,.1);
    padding: 9px 0;
}

.navbar {
    max-width: 1280px;
    height: 100%;
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
}

.logo {
    color: white;
    font-size: 25px;
    font-weight: 900;
    letter-spacing: -1px;
}

    .logo span {
        display: block;
        font-size: 9px;
        letter-spacing: .5px;
        font-weight: 400;
    }

    .logo img {
        display: block;
    }

.nav-links {
    display: flex;
    gap: 34px;
    list-style: none;
}

    .nav-links a {
        color: #fff;
        text-decoration: none;
        font-size: 14px;
        transition: .3s;
    }

        .nav-links a:hover {
            color: #42a5ff;
        }

.nav-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.nav-btn {
    padding: 11px 21px;
    background: linear-gradient(135deg,#034da2,#2364e9);
    color: white;
    border-radius: 30px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
    box-shadow: 0 8px 25px rgba(8,124,255,.3);
}

/* hamburger button (hidden on desktop) */

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    padding: 10px;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 10px;
    cursor: pointer;
}

    .menu-toggle span {
        display: block;
        width: 100%;
        height: 2px;
        background: #fff;
        border-radius: 2px;
        transition: transform .3s, opacity .3s;
    }

    /* hamburger → X */
    .menu-toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

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

.hero {
    position: relative;
    overflow: hidden;
    background: url(../images/techbyte-banner.png);
    color: white;
    display: flex;
    align-items: center;
    background-repeat: no-repeat;
    background-size: cover;
    padding-top: 185px;
    padding-bottom: 100px;
}

    .hero::before {
        content: "";
        position: absolute;
        width: 100%;
        right: 0;
        left: 0;
        top: 0;
        border: 1px solid rgba(0, 162, 255, .25);
        box-shadow: 0 0 80px rgba(0, 150, 255, .15), inset 0 0 80px rgba(0, 150, 255, .08);
        background: rgba(0, 0, 0, 0.7);
        bottom: 0;
    }

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

.w-100 {
    width: 100%;
}


.hero-content {
    max-width: 1250px;
    width: 100%;
    margin: auto;
    position: relative;
    z-index: 2;
}

.text-blue {
    color: #034da2;
}

.hero-small {
    color: #52c5ff;
    font-size: 25px;
    font-weight: 600;
    margin-bottom: 10px;
}

.hero h1 {
    font-size: clamp(60px,8vw,112px);
    line-height: .9;
    letter-spacing: -5px;
    font-weight: 900;
    background: linear-gradient(90deg,#fff 25%,#17a7ff 65%,#5e6bff);
    -webkit-background-clip: text;
    color: transparent;
}

.hero-subtitle {
    margin-top: 18px;
    font-size: 25px;
    letter-spacing: 2px;
    font-weight: 500;
}

.hero-info {
    display: flex;
    gap: 35px;
    margin-top: 35px;
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    gap: 10px;
    align-items: center;
    font-size: 15px;
}

.info-icon {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border: 1px solid rgba(70,180,255,.5);
    border-radius: 10px;
}

.hero-actions {
    margin-top: 35px;
    display: flex;
    gap: 20px;
    align-items: center;
}

.primary-btn {
    background: #034da2;
    color: white;
    border: 0;
    border-radius: 35px;
    padding: 15px 30px;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 12px 35px rgba(8,124,255,.35);
    transition: .3s;
}

    .primary-btn:hover {
        transform: translateY(-3px);
    }

.hero-tagline {
    color: #7dd8ff;
    font-size: 14px;
}

/* tech visual */

.tech-orb {
    position: absolute;
    right: 8%;
    top: 50%;
    transform: translateY(-50%);
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle at center, rgba(24,154,255,.25), rgba(24,154,255,.08) 40%, transparent 70%);
    border: 1px solid rgba(50,180,255,.4);
    box-shadow: 0 0 60px rgba(0,153,255,.3), inset 0 0 70px rgba(0,153,255,.2);
}

    .tech-orb::before,
    .tech-orb::after {
        content: "";
        position: absolute;
        inset: 35px;
        border-radius: 50%;
        border: 1px solid rgba(92,165,255,.35);
    }

    .tech-orb::after {
        inset: 75px;
        border-color: rgba(151,97,255,.5);
    }

.orb-core {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    width: 100px;
    height: 100px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: linear-gradient(135deg,#034da2,#754cff);
    box-shadow: 0 0 60px #034da2;
    font-size: 42px;
}

/* ================= GENERAL ================= */

section {
    padding: 60px 40px;
    /* keeps section titles clear of the fixed header on anchor jumps */
    scroll-margin-top: 70px;
}

.container {
    max-width: 1345px;
    margin: auto;
}

.section-label {
    color: var(--blue);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.section-title {
    font-size: 42px;
    line-height: 1.1;
    margin-bottom: 30px;
}

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

/* ================= ABOUT ================= */

.about {
    background: white;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 70px;
    align-items: center;
}

.about-text p {
    margin-bottom: 18px;
    color: #52627d;
}

.theme-card {
    padding: 35px;
    border-radius: 25px;
    background: linear-gradient(145deg,#edf7ff,#ffffff);
    border: 1px solid #d6e8ff;
    box-shadow: 0 20px 60px rgba(30,90,150,.08);
}

.theme-icon {
    width: 60px;
    height: 60px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg,#034da2,#7054e9);
    color: white;
    border-radius: 18px;
    font-size: 28px;
    margin-bottom: 20px;
}

.theme-card h3 {
    color: #034da2;
    font-size: 23px;
    margin-bottom: 25px;
}

.subtopics {
    list-style: none;
}

    .subtopics li {
        padding: 10px 0;
        border-bottom: 1px solid #dce8f5;
        color: #30466d;
    }

        .subtopics li span {
            color: #034da2;
            font-weight: 800;
            margin-right: 12px;
        }

/* ================= FOCUS ================= */

.focus {
    background: #eef7ff;
}

.cards {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 25px;
}

.focus-card {
    background: white;
    border: 1px solid #d8eaff;
    border-radius: 20px;
    padding: 35px;
    transition: .3s;
}

    .focus-card:hover {
        transform: translateY(-7px);
        box-shadow: 0 20px 50px rgba(20,100,180,.12);
    }

.focus-icon {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: white;
    font-size: 28px;
    background: linear-gradient(135deg,#034da2,#5e5be7);
    margin-bottom: 25px;
}

.focus-card:nth-child(2) .focus-icon {
    background: linear-gradient(135deg,#7651e9,#9b54d9);
}

.focus-card:nth-child(3) .focus-icon {
    background: linear-gradient(135deg,#06aeb4,#00c9a7);
}

.focus-card h3 {
    font-size: 21px;
    margin-bottom: 8px;
}

.focus-card p {
    color: #6a7890;
    font-size: 14px;
}

/* ================= SPEAKERS ================= */

.speakers {
    background: #061d45;
    color: white;
}

    .speakers .section-label {
        color: #49b8ff;
    }

.speaker-grid {
    display: grid;
    grid-template-columns: repeat(5,1fr);
    gap: 18px;
}

.speaker {
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(70,170,255,.3);
    border-radius: 18px;
    padding: 25px 15px;
    text-align: center;
    transition: .3s;
}

    .speaker:hover {
        background: rgba(255,255,255,.09);
        transform: translateY(-5px);
    }

.speaker-img {
    width: 130px;
    height: 130px;
    margin: 0 auto 18px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #d9e7f7, #fff);
    color: #034da2;
    font-weight: 900;
    font-size: 20px;
    overflow: hidden;
}

.speaker h3 {
    font-size: 20px;
    margin-bottom: 5px;
}

.jims-visual > img {
    border-radius: 10px;
}

.speaker p {
    color: #a9c3e7;
    font-size: 15px;
}

/* ================= SCHEDULE ================= */

.schedule {
    background: white;
}


.schedule-row {
    display: grid;
    grid-template-columns: 190px 300px 230px;
    gap: 25px;
    padding: 20px 25px;
    margin-bottom: 8px;
    border-radius: 10px;
    position: relative;
}
.timeline {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 60px;
}

    .schedule-row:hover {
        background: #f1f8ff;
    }

    .schedule-row::before {
        content: "";
        position: absolute;
        left: -7px;
        top: 28px;
        width: 12px;
        height: 12px;
        background: #034da2;
        border-radius: 50%;
    }

.time {
    color: #034da2;
    font-weight: 700;
    font-size: 14px;
}

.event {
    font-weight: 700;
}

.person {
    color: #61718a;
    font-size: 13px;
}

.topic {
    color: #034da2;
    font-size: 20px;
    font-weight: 700;
}

/* ================= JIMS ================= */

.jims {
    background: #edf6ff;
}

.jims-grid {
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 60px;
    align-items: center;
}

.jims-text p {
    color: #56677f;
    margin-bottom: 18px;
}

.jims-visual {
    border-radius: 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 60px;
    font-weight: 900;
    box-shadow: 0 25px 60px rgba(0,60,130,.18);
}

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

.cta {
    background: radial-gradient(circle at 20% 100%,rgba(10,127,255,.35),transparent 30%), radial-gradient(circle at 80% 0%,rgba(115,80,235,.3),transparent 30%), #031735;
    text-align: center;
    color: white;
}

    .cta h2 {
        font-size: 45px;
        margin-bottom: 15px;
    }

    .cta p {
        color: #a9c7e8;
        margin-bottom: 30px;
    }

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

footer {
    background: #02122c;
    color: #91acd1;
    padding: 30px 6%;
}

.footer-inner {
    max-width: 1250px;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-logo {
    color: white;
    font-size: 20px;
    font-weight: 900;
}

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

    .footer-links a {
        color: #91acd1;
        text-decoration: none;
        font-size: 12px;
    }

/* ================= MOBILE ================= */

@media(max-width:1000px) {

    /* mobile menu */
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        flex-direction: column;
        gap: 0;
        background: rgba(3,27,67,.98);
        border-bottom: 1px solid rgba(255,255,255,.1);
        max-height: 0;
        overflow: hidden;
        transition: max-height .35s ease;
    }

        .nav-links.active {
            max-height: 420px;
        }

        .nav-links li {
            border-top: 1px solid rgba(255,255,255,.08);
        }

        .nav-links a {
            display: block;
            padding: 15px 30px;
            font-size: 15px;
        }

    .tech-orb {
        opacity: .3;
        right: -150px;
    }

    .about-grid,
    .jims-grid {
        grid-template-columns: 1fr;
    }

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

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

    .schedule-row {
        grid-template-columns: 130px 1fr;
    }

    .topic {
        grid-column: 2;
    }
}

@media(max-width:600px) {

    header {
        height: 65px;
    }

    .navbar {
        padding: 0 18px;
    }

    .nav-actions {
        gap: 10px;
    }

    .nav-links a {
        padding: 14px 18px;
    }

    .logo img {
        width: 80px;
    }

    .nav-btn {
        padding: 8px 14px;
        font-size: 11px;
    }

    .hero {
        padding: 120px 25px 70px;
    }

        .hero h1 {
            font-size: 60px;
            letter-spacing: -3px;
        }

    .hero-subtitle {
        font-size: 17px;
    }

    .hero-info {
        gap: 15px;
        flex-direction: column;
    }

    .tech-orb {
        width: 300px;
        height: 300px;
        right: -130px;
        top: 55%;
    }

    section {
        padding: 70px 22px;
    }

    .section-title {
        font-size: 34px;
    }

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

    .schedule-row {
        grid-template-columns: 1fr;
        gap: 6px;
        padding: 16px;
    }

        .schedule-row::before {
            display: none;
        }

    .topic {
        grid-column: auto;
    }

    .footer-inner {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}






/* Session headings */
.session {
    margin: 0 0 8px;
    padding: 0;
    list-style: none;
}

.session__name {
    display: flex;
    align-items: center;
    gap: 14px;
    margin: 0px 0 20px;
    font-family: var(--sans);
    font-size: 15px;
    font-weight: 600;
    color: var(--sky);
}

    .session__name::after {
        content: "";
        flex: 1;
        height: 2px;
        background: rgb(3 27 67 / 92%);
        opacity: .35;
    }

.session:first-of-type .session__name {
    margin-top: 0;
}

/* Timeline items */
.slots {
    margin: 0;
    padding: 0;
    list-style: none;
}

.slot {
    position: relative;
    display: grid;
    grid-template-columns: 112px 1fr;
    column-gap: 28px;
    padding-bottom: 15px;
}

    /* vertical rail */
    .slot::before {
        content: "";
        position: absolute;
        left: 140px;
        top: 8px;
        bottom: -8px;
        width: 2px;
        background: #cfd6e4;
    }

    .slot:last-child::before {
        display: none;
    }

    /* node */
    .slot::after {
        content: "";
        position: absolute;
        left: 135px;
        top: 7px;
        width: 12px;
        height: 12px;
        border-radius: 50%;
        background: #f6f7fb;
        border: 2px solid #14213d;
    }

.slot--talk::after {
    background: #f4a300;
    border-color: #f4a300;
}

.slot__time {
    text-align: right;
    font-family: var(--sans);
}

    .slot__time b {
        display: block;
        font-size: 15px;
        font-weight: 600;
        white-space: nowrap;
    }

    .slot__time small {
        display: block;
        margin-top: 2px;
        font-size: 12px;
        color: var(--muted);
        white-space: nowrap;
    }

.slot__body {
    padding-left: 26px;
}

/* quiet items: registration, tea, anthem */
.slot__plain {
    margin: 0;
    color: var(--muted);
    font-size: 17px;
}

/* talks */
.slot__topic {
    margin: 0 0 4px;
    font-family: var(--sans);
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -.01em;
    line-height: 1.25;
}

.slot__who {
    margin: 0;
    font-weight: 600;
}

.slot__role {
    margin: 0;
    color: var(--muted);
    font-size: 16px;
}

/* closing block has no end time */
.slot--end .slot__time b {
    color: var(--muted);
    font-weight: 400;
}

@media (max-width: 520px) {
    body {
        padding: 28px 16px 48px;
    }

    .slot {
        grid-template-columns: 1fr;
        padding-left: 28px;
    }

        .slot::before {
            left: 5px;
        }

        .slot::after {
            left: 0;
        }

    .slot__time {
        text-align: left;
        margin-bottom: 4px;
    }

        .slot__time b, .slot__time small {
            display: inline;
        }

            .slot__time small::before {
                content: " – ";
            }

    .slot__body {
        padding-left: 0;
    }
}