/* ============================================================
   ACRT 2027 — CONFERENCE REGISTRATION
   Editorial / Premium Registration Cards
   ============================================================ */

.registration-section {
    position: relative;
    padding: 85px 0 90px;
    background:
        radial-gradient(
            ellipse at 50% 20%,
            rgba(203, 168, 104, 0.08) 0%,
            transparent 55%
        ),
        var(--paper);
    overflow: hidden;
}

.registration-wrap {
    width: min(1230px, calc(100% - 40px));
    max-width: var(--max);
    margin: 0 auto;
}


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

.registration-header {
    display: grid;
    grid-template-columns: 1fr 330px;
    align-items: end;
    gap: 60px;
    margin-bottom: 52px;
}

.registration-header > div {
    position: relative;
}

.registration-header > div::after {
    content: "";
    display: block;
    width: 100%;
    max-width: 680px;
    height: 1px;
    margin-top: 26px;
    background: var(--line-strong);
}

.registration-header .section-label {
    display: inline-flex;
    align-items: center;
    gap: 18px;

    margin-bottom: 12px;

    font-family: "IBM Plex Mono", monospace;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.22em;
    text-transform: uppercase;

    color: var(--terracotta);
}

.registration-header .section-label::after {
    content: "";
    width: 70px;
    height: 1px;
    background: var(--bronze);
}

.registration-header h2 {
    margin: 0;

    font-family: "Fraunces", serif;
    font-size: clamp(3rem, 5vw, 4.4rem);
    font-weight: 400;
    line-height: 1.02;
    letter-spacing: -0.035em;

    color: var(--void);
}

.registration-header > p {
    position: relative;

    margin: 0;
    padding-left: 22px;

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

    max-width: 32ch;

    color: var(--ink-soft);

    font-family: "Space Grotesk", sans-serif;
    font-size: 0.98rem;
    line-height: 1.7;
}


/* ============================================================
   REGISTRATION GRID
   ============================================================ */

.registration-plans {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;

    background: transparent;
    border: 0;
}


/* ============================================================
   INDIVIDUAL CARD
   ============================================================ */

.registration-plan {
    position: relative;

    display: flex;
    flex-direction: column;

    min-height: 650px;

    padding: 27px 24px 23px;

    background:
        linear-gradient(
            180deg,
            rgba(255,255,255,0.96),
            rgba(250,247,240,0.96)
        );

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

    border-radius: 12px;

    box-shadow:
        0 8px 26px rgba(18, 12, 31, 0.07);

    overflow: hidden;

    transition:
        transform .28s ease,
        box-shadow .28s ease,
        border-color .28s ease;
}

.registration-plan:hover {
    transform: translateY(-6px);

    border-color: var(--bronze-light);

    box-shadow:
        0 18px 40px rgba(18, 12, 31, 0.13);
}


/* ============================================================
   CARD BOTTOM DECORATION
   ============================================================ */

.registration-plan::after {
    content: "";
    position: absolute;

    left: 0;
    right: 0;
    bottom: 0;

    height: 15px;

    background:
        repeating-radial-gradient(
            ellipse at 50% 100%,
            transparent 0 6px,
            rgba(201,180,138,0.45) 7px 8px,
            transparent 9px 14px
        );

    opacity: .65;

    pointer-events: none;
}


/* ============================================================
   CARD TOP
   ============================================================ */

.registration-plan-top {
    display: flex;
    align-items: center;
    justify-content: space-between;

    gap: 15px;

    margin-bottom: 25px;
    padding-bottom: 15px;

    border-bottom: 1px solid var(--line);
}

.registration-number {
    display: flex;
    align-items: center;
    justify-content: center;

    width: 62px;
    height: 62px;

    border: 1px dashed var(--terracotta);

    border-radius: 50%;

    font-family: "Fraunces", serif;
    font-size: 1.65rem;
    font-style: italic;
    font-weight: 500;

    color: var(--terracotta);

    flex-shrink: 0;
}

.registration-category {
    font-family: "IBM Plex Mono", monospace;

    font-size: .66rem;
    font-weight: 600;

    letter-spacing: .16em;
    text-transform: uppercase;

    color: var(--terracotta);
}


/* ============================================================
   OPTIONAL CATEGORY COLORS
   ============================================================ */

.registration-plan:nth-child(2) .registration-number,
.registration-plan:nth-child(2) .registration-category {
    color: var(--bronze-light);
}

.registration-plan:nth-child(3) .registration-number,
.registration-plan:nth-child(3) .registration-category {
    color: var(--violet);
}

.registration-plan:nth-child(4) .registration-number,
.registration-plan:nth-child(4) .registration-category {
    color: var(--cyan);
}


/* ============================================================
   PRICE
   ============================================================ */

.registration-price {
    display: flex;
    align-items: flex-start;

    gap: 5px;

    margin-top: 15px;
    margin-bottom: 0;

    color: var(--void);
}

.registration-price .currency {
    padding-top: 10px;

    font-family: "IBM Plex Mono", monospace;

    font-size: .95rem;
    font-weight: 600;
}

.registration-price .amount {
    font-family: "Fraunces", serif;

    font-size: clamp(3.5rem, 5vw, 4.4rem);
    font-weight: 500;
    font-style: italic;

    line-height: .95;

    letter-spacing: -.045em;
}

.registration-period {
    display: flex;
    align-items: center;
    gap: 12px;

    margin-top: 14px;

    font-family: "IBM Plex Mono", monospace;

    font-size: .64rem;
    font-weight: 600;

    letter-spacing: .15em;
    text-transform: uppercase;

    color: var(--bronze);
}

.registration-period::before,
.registration-period::after {
    content: "";

    width: 25px;
    height: 1px;

    background: var(--bronze-light);
}


/* ============================================================
   DIVIDER
   ============================================================ */

.registration-divider {
    position: relative;

    height: 1px;

    margin: 28px 0 24px;

    background: var(--line);
}

.registration-divider::after {
    content: "◆";

    position: absolute;

    left: 50%;
    top: 50%;

    transform: translate(-50%, -50%);

    padding: 0 7px;

    background: var(--paper);

    font-size: .5rem;

    color: var(--bronze);
}


/* ============================================================
   FEATURES
   ============================================================ */

.registration-features {
    display: flex;
    flex-direction: column;

    gap: 14px;

    flex: 1;

    margin: 0;
    padding: 0;

    list-style: none;
}

.registration-features li {
    display: flex;
    align-items: flex-start;

    gap: 11px;

    color: var(--ink);

    font-family: "Space Grotesk", sans-serif;

    font-size: .88rem;

    line-height: 1.45;
}

.registration-features li i {
    display: flex;
    align-items: center;
    justify-content: center;

    width: 22px;
    height: 22px;

    margin-top: -1px;

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

    border-radius: 50%;

    color: var(--terracotta);

    font-size: .62rem;

    flex-shrink: 0;
}


/* Student */

.registration-plan:nth-child(3)
.registration-features li i {
    border-color: var(--violet);
    color: var(--violet);
}


/* Virtual */

.registration-plan:nth-child(4)
.registration-features li i {
    border-color: var(--cyan);
    color: var(--cyan);
}


/* ============================================================
   BUTTON
   ============================================================ */

.registration-btn {
    position: relative;
    z-index: 2;

    display: flex;
    align-items: center;
    justify-content: space-between;

    gap: 12px;

    width: 100%;

    margin-top: 30px;

    padding: 14px 16px;

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

    background: transparent;

    color: var(--ink);

    font-family: "IBM Plex Mono", monospace;

    font-size: .68rem;
    font-weight: 600;

    letter-spacing: .1em;

    text-transform: uppercase;
    text-decoration: none;

    transition:
        background .25s ease,
        color .25s ease,
        border-color .25s ease,
        transform .25s ease;
}

.registration-btn span {
    font-family: "Space Grotesk", sans-serif;

    font-size: 1.1rem;

    transition: transform .25s ease;
}

.registration-btn:hover {
    background: var(--terracotta);

    border-color: var(--terracotta);

    color: var(--paper) !important;
}

.registration-btn:hover span {
    transform: translateX(5px);
}


/* ============================================================
   FEATURED INDUSTRY CARD
   ============================================================ */

.registration-plan-featured {
    background:
        radial-gradient(
            circle at 50% 90%,
            rgba(155,134,255,.28),
            transparent 48%
        ),
        linear-gradient(
            145deg,
            var(--void) 0%,
            var(--void-soft) 58%,
            var(--void-alt) 100%
        );

    border: 3px solid var(--bronze);

    box-shadow:
        0 18px 45px rgba(18,12,31,.24);

    transform: translateY(-10px);

    color: var(--paper);

    z-index: 2;
}

.registration-plan-featured:hover {
    transform: translateY(-15px);
}

.registration-plan-featured .registration-plan-top {
    border-color: rgba(203,168,104,.5);
}

.registration-plan-featured .registration-number {
    color: var(--bronze-light);

    border-color: var(--bronze-light);
}

.registration-plan-featured .registration-category {
    color: var(--bronze-light);
}

.registration-plan-featured .registration-price {
    color: var(--paper);
}

.registration-plan-featured .registration-period {
    color: var(--bronze-light);
}

.registration-plan-featured .registration-period::before,
.registration-plan-featured .registration-period::after {
    background: var(--bronze);
}

.registration-plan-featured .registration-divider {
    background: rgba(203,168,104,.5);
}

.registration-plan-featured .registration-divider::after {
    background: var(--void-soft);
    color: var(--bronze-light);
}

.registration-plan-featured .registration-features li {
    color: var(--paper);
}

.registration-plan-featured .registration-features li i {
    border-color: var(--bronze-light);
    color: var(--bronze-light);
}

.registration-plan-featured .registration-btn {
    background: linear-gradient(
        135deg,
        var(--bronze-light),
        var(--bronze)
    );

    border-color: var(--bronze-light);

    color: var(--void);
}

.registration-plan-featured .registration-btn:hover {
    background: var(--paper);

    border-color: var(--paper);

    color: var(--void) !important;
}


/* ============================================================
   MOST POPULAR LABEL
   ============================================================ */

.registration-popular {
    position: absolute;

    top: 0;
    left: 50%;

    transform: translateX(-50%);

    padding: 8px 22px;

    background: var(--bronze-light);

    color: var(--void);

    font-family: "IBM Plex Mono", monospace;

    font-size: .63rem;
    font-weight: 600;

    letter-spacing: .1em;

    text-transform: uppercase;

    white-space: nowrap;

    z-index: 5;
}


/* ============================================================
   EARLY BIRD NOTICE
   ============================================================ */

.registration-early-note {
    display: flex;
    align-items: center;
    justify-content: center;

    gap: 18px;

    max-width: 720px;

    margin: 32px auto 0;

    padding: 14px 24px;

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

    border-radius: 40px;

    background: rgba(250,247,240,.75);

    color: var(--ink-soft);

    font-family: "Space Grotesk", sans-serif;

    font-size: .9rem;

    text-align: center;
}

.registration-early-note strong {
    color: var(--terracotta);
}


/* ============================================================
   TABLET
   ============================================================ */

@media (max-width: 1100px) {

    .registration-header {
        grid-template-columns: 1fr 280px;
        gap: 35px;
    }

    .registration-plan {
        min-height: 620px;
        padding: 25px 20px 22px;
    }

    .registration-price .amount {
        font-size: 3.5rem;
    }

    .registration-features li {
        font-size: .83rem;
    }

}


/* ============================================================
   SMALL TABLET
   ============================================================ */

@media (max-width: 900px) {

    .registration-section {
        padding: 70px 0;
    }

    .registration-header {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .registration-header > p {
        max-width: 55ch;
    }

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

    .registration-plan {
        min-height: 600px;
    }

    .registration-plan-featured {
        transform: none;
    }

    .registration-plan-featured:hover {
        transform: translateY(-5px);
    }

}


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

@media (max-width: 600px) {

    .registration-section {
        padding: 55px 0 65px;
    }

    .registration-wrap {
        width: min(100% - 28px, 500px);
    }

    .registration-header {
        margin-bottom: 35px;
    }

    .registration-header h2 {
        font-size: 2.45rem;
    }

    .registration-header > p {
        padding-left: 15px;

        font-size: .9rem;
    }

    .registration-plans {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .registration-plan {
        min-height: auto;

        padding: 27px 22px 24px;
    }

    /* .registration-plan-featured {
        order: -1;
    } */

    .registration-number {
        width: 55px;
        height: 55px;

        font-size: 1.45rem;
    }

    .registration-price .amount {
        font-size: 3.8rem;
    }

    .registration-features {
        gap: 13px;
    }

    .registration-features li {
        font-size: .88rem;
    }

    .registration-btn {
        margin-top: 27px;
    }

    .registration-early-note {
        margin-top: 25px;

        border-radius: 15px;

        padding: 13px 16px;

        font-size: .82rem;
    }

}


/* ============================================================
   SMALL PHONES
   ============================================================ */

@media (max-width: 400px) {

    .registration-section {
        padding: 45px 0 55px;
    }

    .registration-header h2 {
        font-size: 2.1rem;
    }

    .registration-plan {
        padding: 24px 18px 22px;
    }

    .registration-price .amount {
        font-size: 3.3rem;
    }

    .registration-features li {
        font-size: .82rem;
    }

}