@import url('./normalize.css') layer(normalize);

@font-face {
    font-family: 'Geist Sans';
    src: url('./fonts/GeistVF.ttf') format('truetype');
}

@layer normalize, base, cooking, glow, canvas-date, button, form, layout;

/* ─────────────────────────────────────────
   BASE
───────────────────────────────────────── */
@layer base {
    :root {
        --font-size-min: 16;
        --font-size-max: 20;
        --font-ratio-min: 1.2;
        --font-ratio-max: 1.33;
        --font-width-min: 375;
        --font-width-max: 1500;
    }

    *,
    *::before,
    *::after {
        box-sizing: border-box;
    }

    html {
        color-scheme: dark only;
    }

    body {
        background: #000;
        color: #fff;
        margin: 0;
        font-family: 'Geist Sans', 'SF Pro Text', 'Helvetica Neue', Arial, sans-serif;
        font-weight: 160;
        overflow-x: hidden;
    }

    :where(.fluid) {
        --fluid-min: calc(var(--font-size-min) * pow(var(--font-ratio-min), var(--font-level, 0)));
        --fluid-max: calc(var(--font-size-max) * pow(var(--font-ratio-max), var(--font-level, 0)));
        --fluid-preferred: calc(
            (var(--fluid-max) - var(--fluid-min)) / (var(--font-width-max) - var(--font-width-min))
        );
        --fluid-type: clamp(
            (var(--fluid-min) / 16) * 1rem,
            ((var(--fluid-min) / 16) * 1rem) - (((var(--fluid-preferred) * var(--font-width-min)) / 16) * 1rem) +
                (var(--fluid-preferred) * 100vi),
            (var(--fluid-max) / 16) * 1rem
        );
        font-size: var(--fluid-type);
    }

    .label {
        font-size: 0.65rem;
        letter-spacing: 0.3em;
        color: rgba(255, 255, 255, 0.35);
        text-transform: uppercase;
        margin: 0;
    }
}

/* ─────────────────────────────────────────
   COOKING LETTERS
   Default: static. Animates only while hovering hero.
───────────────────────────────────────── */
@layer cooking {
    .words,
    .word,
    .char,
    .char::before,
    .char::after {
        transform-style: preserve-3d;
        display: inline-block;
    }

    .cooking {
        --font-level: 6;
        margin: 0;
        font-weight: 120;
        line-height: 1;
        width: fit-content;
        letter-spacing: 0.04em;
        text-align: center;
    }

    .cooking .char {
        --duration: 2.4s;
        --delay: calc(
            (sin((var(--char-index) / var(--char-total)) * 90deg) * (var(--duration) * 0.25)) - (var(--idx, 0) * -0.28s)
        );
        display: inline-block;
        /* no animation by default — chars rest in their original position */
        animation: none;
        color: transparent;
        position: relative;
        height: 0.9lh;
        line-height: 1;
        vertical-align: middle;

        &::before,
        &::after {
            color: white;
            content: attr(data-char);
            position: absolute;
            top: 50%;
            left: 50%;
            height: 1lh;
            width: 100%;
            animation: none;
        }

        &::before {
            transform-origin: 50% 50%;
            translate: -50% -50%;
            transform: rotateX(-90deg) translate3d(0, 0, 0.45lh);
            opacity: 0;
            --opacity: 1;
        }

        &::after {
            translate: -50% -50%;
            transform: translate3d(0, 0, 0.45lh);
        }
    }

    /* Hover: full animation declaration starts fresh each hover.
       Guard with hover+fine-pointer so touch devices never trigger the
       flash-then-snap animation when iOS fires synthetic :hover on tap. */
    @media (hover: hover) and (pointer: fine) {
        .s-hero:hover .cooking .char {
            animation: ck-flip var(--duration) var(--delay) infinite ease;
        }
        .s-hero:hover .cooking .char::before {
            animation: ck-fade var(--duration) var(--delay) infinite ease;
        }
        .s-hero:hover .cooking .char::after {
            animation: ck-fade var(--duration) var(--delay) infinite ease;
        }
    }

    @keyframes ck-flip {
        25%,
        100% {
            transform: rotateX(90deg);
        }
    }

    @keyframes ck-fade {
        30%,
        100% {
            opacity: var(--opacity, 0);
        }
    }
}

/* ─────────────────────────────────────────
   GLOW TEXT
   Fades in from zero when section enters view
───────────────────────────────────────── */
@layer glow {
    .glow-heading {
        --font-level: 5;
        position: relative;
        margin: 0;
        font-weight: 120;
        line-height: 1.05;
        letter-spacing: -0.01em;
        text-align: center;

        span:first-child {
            display: block;
            color: transparent;
        }

        span[aria-hidden='true'] {
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            /* start invisible — transition to glow on .in-view */
            color: rgba(255, 255, 255, 0);
            filter: none;
            transform: translateZ(0);
            transition:
                color 0.9s ease-out,
                filter 1.4s ease-out;
        }
    }

    /* Triggered by IntersectionObserver */
    .s-glow.in-view .glow-heading span[aria-hidden='true'] {
        color: white;
        filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.95)) drop-shadow(0 0 10px rgba(255, 255, 255, 0.75))
            drop-shadow(0 0 22px rgba(255, 255, 255, 0.45)) drop-shadow(0 0 48px rgba(255, 255, 255, 0.2));
    }

    .glow-sub {
        font-size: 0.8rem;
        letter-spacing: 0.2em;
        color: rgba(255, 255, 255, 0);
        text-transform: uppercase;
        margin: 2.5rem 0 0;
        text-align: center;
        transition: color 1.2s ease-out 0.5s;
    }

    .s-glow.in-view .glow-sub {
        color: rgba(255, 255, 255, 0.3);
    }
}

/* ─────────────────────────────────────────
   CANVAS DATE
───────────────────────────────────────── */
@layer canvas-date {
    .date-wrap {
        font-size: clamp(3rem, 14vw + 0.5rem, 15rem);
        font-weight: 120;
        line-height: 1;
    }

    .text-block {
        display: inline-block;
        position: relative;
        /* Isolate from any 3D rendering context created by cooking chars */
        transform-style: flat;
    }

    .date-str {
        display: block;
        color: transparent;
        white-space: nowrap;
    }

    canvas {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
        filter: brightness(1.6);
    }

    .date-year {
        font-size: clamp(0.9rem, 2.5vw, 2.5rem);
        letter-spacing: 0.55em;
        color: rgba(255, 255, 255, 0.2);
        margin: 1.5rem 0 0;
        text-transform: uppercase;
    }
}

/* ─────────────────────────────────────────
   RAINBOW BORDER BUTTON
───────────────────────────────────────── */
@layer button {
    @property --complete {
        initial-value: 0;
        inherits: true;
        syntax: '<number>';
    }

    .btn-wrap {
        position: relative;
        display: inline-flex;
        margin-top: 2rem;
    }

    .atc {
        user-select: none;
        -webkit-tap-highlight-color: transparent;
        position: relative;
        border-radius: 100px;
        color: white;
        font-family: inherit;
        font-weight: 400;
        font-size: 0.8rem;
        letter-spacing: 0.18em;
        padding: 0;
        border: 2px solid rgba(255, 255, 255, 0.25);
        cursor: pointer;
        background: #000;
        transition-property: translate, scale;
        transition-duration: 0.16s;
        transition-timing-function: ease-out;

        &[data-adding='false']:active {
            translate: 0 1px;
            scale: 0.99;
        }
        &[disabled] {
            cursor: default;
            opacity: 0.7;
        }
    }

    .atc__content {
        display: flex;
        align-items: center;
        gap: 0.6rem;
        padding: 1rem 2.5rem;
        border-radius: inherit;
        position: relative;
        z-index: 2;

        &::before {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: inherit;
            background: #000;
            z-index: -1;
        }
    }

    .atc__check {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 20px;
        height: 20px;
        position: absolute;
        left: 50%;
        top: 50%;
        translate: -50% -50%;
        opacity: 0;
        stroke: hsl(140 90% 55%);

        svg {
            width: 100%;
            height: 100%;
        }
    }

    .atc__border {
        position: absolute;
        inset: -2px;
        container-type: inline-size;
        border: 2px solid transparent;
        mask:
            linear-gradient(#fff 0 0) padding-box,
            linear-gradient(#fff 0 0) border-box;
        mask-composite: exclude;
        border-radius: inherit;

        &.atc__border--static {
            opacity: 0;
            border-color: white;
        }
        &.atc__border--complete {
            opacity: 0;
            border-color: hsl(140 90% 55%);
        }

        &.atc__border--animated::after {
            content: '';
            width: calc(100cqi + 4px);
            height: calc(100cqi + 4px);
            background: conic-gradient(
                from calc(var(--complete, 0) * 180deg) in hsl increasing hue,
                #0000 0 calc((1 - var(--complete)) * 20%),
                hsl(0 100% 65%) calc((1 - var(--complete)) * 30%),
                hsl(339 100% 65%) calc(100% - ((1 - var(--complete)) * 30%)),
                #0000 calc(100% - ((1 - var(--complete)) * 20%)) 100%
            );
            position: absolute;
            top: 50%;
            left: 50%;
            translate: -50% -50%;
            z-index: -1;
            animation: btn-spin 2.4s infinite linear;
            transition: --complete 0.22s ease-out;
        }
    }

    [data-complete='true'] .atc__border::after {
        --complete: 1;
    }

    @keyframes btn-spin {
        to {
            rotate: 360deg;
        }
    }
}

/* ─────────────────────────────────────────
   RSVP FORM
───────────────────────────────────────── */
@layer form {
    .rsvp-form {
        display: flex;
        flex-direction: column;
        width: min(400px, 100%);
    }

    .rsvp-field {
        display: flex;
        gap: 10px;
        align-items: center;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        padding: 10px 0;
        transition: border-color 0.3s;

        &:focus-within {
            border-bottom-color: rgba(255, 255, 255, 0.3);
        }
    }

    .rsvp-field--row {
        gap: 14px;
    }

    .rsvp-field-label {
        font-size: 0.7rem;
        color: rgba(255, 255, 255, 0.35);
        letter-spacing: 0.08em;
        white-space: nowrap;
    }

    .rsvp-form input,
    .rsvp-form textarea {
        flex: 1;
        background: transparent;
        border: none;
        outline: none;
        color: #fff;
        font-family: inherit;
        font-size: 0.88rem;
        font-weight: 160;
        padding: 4px 0;
        letter-spacing: 0.03em;
        caret-color: #fff;

        &::placeholder {
            color: rgba(255, 255, 255, 0.2);
            font-style: italic;
        }
    }

    .rsvp-form input[type='number'] {
        flex: 0 0 auto;
        width: 44px;
        -moz-appearance: textfield;
        appearance: textfield;
        &::-webkit-inner-spin-button,
        &::-webkit-outer-spin-button {
            -webkit-appearance: none;
        }
    }

    .rsvp-form textarea {
        resize: none;
        line-height: 1.5;
    }

    .btn-decline {
        background: transparent;
        border: none;
        color: rgba(255, 255, 255, 0.3);
        font-family: inherit;
        font-size: 0.68rem;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        padding: 8px 0;
        cursor: pointer;
        text-decoration: underline;
        text-underline-offset: 4px;
        text-decoration-color: rgba(255, 255, 255, 0.15);
        margin-top: 0.5rem;
        transition: color 0.2s;
        text-align: left;

        &:hover {
            color: rgba(255, 255, 255, 0.7);
        }
    }

    .form-note {
        font-size: 0.72rem;
        color: rgba(255, 255, 255, 0.38);
        letter-spacing: 0.04em;
        min-height: 1.2em;
        margin: 0.8rem 0 0;
        transition: color 0.3s;
    }

    .rsvp-form.submitted .rsvp-field,
    .rsvp-form.submitted .btn-wrap,
    .rsvp-form.submitted .btn-decline {
        opacity: 0.25;
        pointer-events: none;
        transition: opacity 0.5s;
    }
}

/* ─────────────────────────────────────────
   LAYOUT — Sections & Page Structure
───────────────────────────────────────── */
@layer layout {
    /* All sections */
    .s-hero,
    .s-glow,
    .s-date,
    .s-details,
    .s-rsvp {
        min-height: 100svh;
    }

    /* ── Hero ── */
    .s-hero {
        position: relative;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 4rem 2rem;
        overflow: hidden;

        &::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px 60px) 0 0 / 60px 60px,
                linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px 60px) 0 0 / 60px 60px;
            mask: linear-gradient(to bottom, transparent, black 30%, black 70%, transparent);
            pointer-events: none;
        }
    }

    .eyebrow {
        font-size: 0.6rem;
        letter-spacing: 0.28em;
        color: rgba(255, 255, 255, 0.3);
        text-transform: uppercase;
        margin: 0 0 3rem;
        text-align: center;
        position: relative;
        z-index: 1;
    }

    .hero-titles {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.4rem;
        position: relative;
        z-index: 1;
    }

    .hero-hint {
        margin: 2rem 0 0;
        font-size: 0.6rem;
        letter-spacing: 0.22em;
        color: rgba(255, 255, 255, 0.18);
        text-transform: uppercase;
        text-align: center;
        position: relative;
        z-index: 1;
    }

    .scroll-hint {
        position: absolute;
        bottom: 2rem;
        left: 50%;
        translate: -50% 0;
        font-size: 1.1rem;
        color: rgba(255, 255, 255, 0.18);
        margin: 0;
        animation: hint-bob 2.4s ease-in-out infinite;
    }

    @keyframes hint-bob {
        0%,
        100% {
            translate: -50% 0;
            opacity: 0.18;
        }
        50% {
            translate: -50% 10px;
            opacity: 0.45;
        }
    }

    /* ── Glow ── */
    .s-glow {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 5rem 2rem;
        gap: 0.3rem;
    }

    /* ── Date ── */
    .s-date {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 4rem 2rem;
        gap: 0.6rem;
        text-align: center;
    }

    /* ── Details ── */
    .s-details {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 5rem 2rem;
        gap: 4rem;
    }

    .divider {
        width: min(560px, 88vw);
        border: none;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        margin: 0;
    }

    .detail-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
        gap: 3rem;
        width: min(620px, 88vw);
        text-align: center;
    }

    .detail {
        display: flex;
        flex-direction: column;
        gap: 0.45rem;

        .label {
            margin-bottom: 0.3rem;
        }

        strong {
            font-size: 1rem;
            font-weight: 300;
            letter-spacing: 0.06em;
            color: white;
        }

        span:not(.label) {
            font-size: 0.72rem;
            color: rgba(255, 255, 255, 0.38);
            letter-spacing: 0.04em;
        }
    }

    /* ── RSVP — two column ── */
    .s-rsvp {
        display: grid;
        grid-template-columns: 1fr 1fr;
        align-items: center;
        gap: 4vw;
        padding: 4rem clamp(2rem, 5vw, 5rem);
    }

    .rsvp-left {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
        justify-self: end;
        max-width: 380px;
    }

    .rsvp-heading {
        font-weight: 120;
        font-size: clamp(1.8rem, 4vw, 3.5rem);
        line-height: 1.05;
        letter-spacing: -0.01em;
        margin: 0;
        color: white;
    }

    .rsvp-note {
        font-size: 0.82rem;
        color: rgba(255, 255, 255, 0.45);
        letter-spacing: 0.06em;
        line-height: 2;
        margin: 0;

        strong {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 400;
        }
    }

    .rsvp-hint {
        font-size: 0.7rem;
        color: rgba(255, 255, 255, 0.25);
        letter-spacing: 0.08em;
        line-height: 1.8;
        margin: 0;

        em {
            font-style: normal;
            color: rgba(255, 255, 255, 0.5);
        }
    }

    /* ── Footer — NOT a snap target, tight compact ── */
    .s-footer {
        padding: 1.5rem 2rem;
        border-top: 1px solid rgba(255, 255, 255, 0.07);
        text-align: center;
        font-size: 0.68rem;
        color: rgba(255, 255, 255, 0.22);
        letter-spacing: 0.12em;
        display: flex;
        flex-direction: column;
        gap: 0.4rem;

        p {
            margin: 0;
        }
    }

    .brand {
        font-size: 0.55rem;
        letter-spacing: 0.3em;
        color: rgba(255, 255, 255, 0.1) !important;
    }

    /* ── Responsive ── */
    @media (max-width: 680px) {
        .s-rsvp {
            grid-template-columns: 1fr;
            padding: 3rem 1.5rem;
            gap: 2.5rem;
            align-content: center;
        }
        .rsvp-left {
            text-align: center;
            align-items: center;
            justify-self: center;
            max-width: 100%;
        }
        .rsvp-form {
            width: 100%;
        }
    }
}