:root {
    --navy: #073c7c;
    --blue: #00a9d4;
    --pink: #ef3f78;
    --ink: #12345a;
    --light: #f5fbff;
    --white: #fff
}

* {
    box-sizing: border-box
}

html {
    scroll-behavior: smooth
}

body {
    margin: 0;
    font-family: Inter,Arial,sans-serif;
    color: var(--ink);
    background: var(--light)
}

header {
    height: 76px;
    display: flex;
    align-items: center;
    padding: 0 5vw;
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 20;
    box-shadow: 0 8px 30px #063a7012
}

.brand {
    font-weight: 900;
    color: var(--navy);
    text-decoration: none;
    font-size: 1.2rem;
    letter-spacing: .08em
}

    .brand span {
        background: linear-gradient(135deg,var(--blue),var(--pink));
        color: #fff;
        padding: .55rem;
        border-radius: 50%
    }

nav {
    margin-left: auto;
    display: flex;
    gap: 1.1rem;
    align-items: center
}

    nav a {
        color: var(--navy);
        text-decoration: none;
        font-weight: 700;
        font-size: .88rem
    }

        nav a:last-child {
            background: var(--pink);
            color: #fff;
            padding: .75rem 1rem;
            border-radius: 999px
        }

.menu {
    display: none;
    margin-left: auto;
    border: 0;
    background: none;
    font-size: 1.6rem
}

.hero {
    min-height: calc(100vh - 76px);
    background: linear-gradient(90deg,rgba(3,48,102,.86),rgba(0,142,190,.15)),url('https://dddiving.org/assets/images/dd-diving-hero.png') center/cover;
    display: grid;
    align-items: center;
    padding: 6vw
}

.hero-overlay {
    max-width: 800px;
    color: #fff
}

.eyebrow {
    font-weight: 900;
    letter-spacing: .18em;
    color: #12c4e8
}

.hero h1, .page-hero h1 {
    font-size: clamp(3rem,7vw,6.5rem);
    line-height: .9;
    margin: .15em 0
}

.hero p {
    font-size: 1.25rem
}

.level-nav {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 14px;
    margin-top: 2rem
}

.level {
    color: #fff;
    text-decoration: none;
    padding: 1.4rem;
    border-radius: 18px;
    backdrop-filter: blur(8px);
    transition: .3s;
    box-shadow: 0 15px 35px #001b4050
}

    .level:hover {
        transform: translateY(-8px) scale(1.02)
    }

    .level span, .level small {
        display: block
    }

    .level b {
        font-size: 1.35rem
    }

.beginner {
    background: #064b91df
}

.intermediate {
    background: #00a7cddd
}

.advanced {
    background: #ef3f78df
}
.waiver {
    color: #fff;
    text-decoration: none;
    padding: 1.4rem;
    border-radius: 18px;
    backdrop-filter: blur(8px);
    transition: .3s;
    box-shadow: 0 100px 100px #001b4050
}

    .waiver:hover {
        transform: translateY(-8px) scale(1.02)
    }

    .waiver span, .waiver small {
        display: block
    }

    .waiver b {
        font-size: 1.35rem
    }

.waivercard {
    background: #ef3f78df
}
.section {
    padding: 7rem 8vw;
    max-width: 1400px;
    margin: auto
}

    .section h2 {
        font-size: clamp(2.2rem,5vw,4.5rem);
        margin: .2em 0
    }

.lead {
    max-width: 760px;
    font-size: 1.25rem
}
.container {
    width: min(1200px,calc(100% - 2rem));
    margin: auto
}
.cards {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 22px;
    margin-top: 3rem
}

    .cards article {
        background: #fff;
        padding: 2rem;
        border-radius: 24px;
        box-shadow: 0 18px 55px #06447b15;
        border-top: 5px solid var(--blue)
    }

        .cards article:nth-child(3) {
            border-color: var(--pink)
        }

.page-hero {
    padding: 8rem 8vw;
    background: linear-gradient(135deg,var(--navy),#087fb3);
    color: #fff;
    min-height: 55vh;
    display: flex;
    flex-direction: column;
    justify-content: center
}

    .page-hero p {
        max-width: 720px;
        font-size: 1.2rem
    }

.beginner-bg {
    background: linear-gradient(135deg,#064b91,#00a9d4)
}

.intermediate-bg {
    background: linear-gradient(135deg,#007b9c,#15c9df)
}

.advanced-bg {
    background: linear-gradient(135deg,#b51d58,#ef3f78)
}

.btn {
    display: inline-block;
    width: max-content;
    border: 0;
    background: var(--pink);
    color: #fff;
    padding: 1rem 1.4rem;
    border-radius: 999px;
    font-weight: 900;
    text-decoration: none;
    cursor: pointer
}

.schedule {
    display: grid;
    gap: 12px
}

    .schedule div {
        display: flex;
        justify-content: space-between;
        background: #fff;
        padding: 1.4rem 1.6rem;
        border-radius: 16px
    }

.form {
    max-width: 760px;
    display: grid;
    gap: 18px
}

    .form label {
        font-weight: 800
    }

    .form input, .form textarea, .form select {
        display: block;
        width: 100%;
        margin-top: 8px;
        padding: 1rem;
        border: 2px solid #d8edf6;
        border-radius: 12px;
        font: inherit
    }

.reveal {
    opacity: 0;
    transform: translateY(35px);
    transition: .8s
}

    .reveal.visible {
        opacity: 1;
        transform: none
    }

footer {
    background: #062f63;
    color: #fff;
    padding: 3rem 6vw;
    display: flex;
    justify-content: space-between;
    align-items: center
}

    footer a {
        color: #4de2f2
    }

.menu {
    color: var(--navy)
}

@media(max-width:1000px) {
    .menu {
        display: block
    }

    nav {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #fff;
        padding: 1.5rem 5vw;
        flex-direction: column;
        align-items: stretch
    }

        nav.open {
            display: flex
        }

    .level-nav, .cards {
        grid-template-columns: 1fr
    }

    .hero {
        background-position: 62% center
    }

    .hero-overlay {
        background: #06366fb8;
        padding: 1.5rem;
        border-radius: 24px
    }

    .schedule div {
        flex-direction: column;
        gap: 6px
    }
}

@media(max-width:600px) {
    .hero h1, .page-hero h1 {
        font-size: 3rem
    }

    .section {
        padding: 5rem 6vw
    }

    .page-hero {
        padding: 6rem 6vw
    }

    footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem
    }
}

.form-message {
    max-width: 760px;
    margin-bottom: 1rem;
    padding: 1rem;
    border-radius: 12px
}

    .form-message:empty {
        display: none
    }

    .form-message.success {
        background: #e8fff5;
        color: #075b3b
    }

    .form-message.error {
        background: #fff0f3;
        color: #8b173c
    }

.hp-field {
    position: absolute !important;
    left: -9999px !important;
    opacity: 0 !important
}

.btn:disabled {
    opacity: .65
}

.waiver-check {
    display: flex !important;
    align-items: flex-start;
    gap: .75rem;
    background: #fff;
    padding: 1rem 1.2rem;
    border: 2px solid #d8edf6;
    border-radius: 12px
}

    .waiver-check input {
        width: auto !important;
        margin: .2rem 0 0 !important;
        transform: scale(1.25);
        accent-color: var(--pink)
    }

    .waiver-check span {
        font-weight: 700;
        line-height: 1.45
    }
.signup {
    max-width: 850px;
    margin: auto;
    color: var(--ink)
}
.container {
    width: min(1200px,calc(100% - 2rem));
    margin: auto
}