/* ============================================
   penclo.com — Styles
   Glitch + Ma-Negative-Space + High Contrast
   ============================================ */

/* --- Custom Properties --- */
:root {
    --color-bg: #0b0b0f;
    --color-surface: #141418;
    --color-border-primary: #2a2a2e;
    --color-border-secondary: #3a3a3a;
    --color-text-primary: #e8e8e8;
    --color-text-secondary: #6b6b6b;
    --color-accent: #ff3c3c;
    --color-accent-muted: #8a1c1c;
    --color-dark-concrete: #4a4a4a;

    --font-display: 'Barlow Condensed', sans-serif;
    --font-caption: 'Barlow Condensed', sans-serif;
    --font-mono: 'Space Mono', monospace;

    --frame-outer-offset: 12px;
    --frame-middle-offset: 6px;
    --frame-hover-extra: 4px;

    --transition-enter: 300ms cubic-bezier(0.16, 1, 0.3, 1);
    --transition-exit: 400ms cubic-bezier(0.16, 1, 0.3, 1);
    --transition-reveal: 800ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Reset --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    font-family: var(--font-display);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Site Header --- */
.site-header {
    position: fixed;
    top: 2rem;
    left: 3rem;
    z-index: 100;
}

.site-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--color-text-primary);
    text-decoration: none;
    display: inline-block;
    transition: color var(--transition-enter);
}

.site-title:hover {
    color: var(--color-accent);
}

/* --- Specimens Container --- */
.specimens-container {
    padding-top: 100vh;
    padding-bottom: 10vh;
}

/* --- Specimen Base --- */
.specimen {
    position: relative;
    width: 55%;
    margin-bottom: 0;
    opacity: 0;
    transition: opacity 600ms ease 200ms;
}

.specimen.is-visible {
    opacity: 1;
}

/* --- Specimen Positions (serpentine) --- */
.specimen--left {
    margin-left: 10%;
    margin-right: auto;
}

.specimen--right {
    margin-left: auto;
    margin-right: 10%;
}

.specimen--center {
    margin-left: auto;
    margin-right: auto;
}

.specimen--offset-left {
    margin-left: 25%;
    margin-right: auto;
}

.specimen--offset-right {
    margin-left: auto;
    margin-right: 30%;
}

/* --- Vertical Spacing --- */
.specimen:nth-of-type(1) {
    margin-bottom: 0;
}

.specimen:nth-of-type(2) {
    margin-top: 0;
}

/* --- Specimen Frame --- */
.specimen__frame {
    position: relative;
    padding: 0;
}

/* --- Border Rectangles --- */
.specimen__border {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 1px solid transparent;
    pointer-events: none;
    transition: transform var(--transition-exit);
    will-change: transform;
}

.specimen__border--outer {
    border-color: var(--color-border-primary);
    transform: translate(calc(var(--frame-outer-offset) * var(--scroll-shift, 0)), 0) translate(var(--frame-outer-offset), calc(var(--frame-outer-offset) * -1));
}

.specimen__border--middle {
    border-color: var(--color-border-secondary);
    transform: translate(calc(var(--frame-middle-offset) * var(--scroll-shift, 0) * -1), 0) translate(var(--frame-middle-offset), calc(var(--frame-middle-offset) * -1));
}

.specimen__border--inner {
    border-color: var(--color-border-secondary);
    position: relative;
}

/* Hover: expand offsets */
.specimen:hover .specimen__border--outer {
    transform: translate(calc(var(--frame-outer-offset) * var(--scroll-shift, 0)), 0) translate(calc(var(--frame-outer-offset) + var(--frame-hover-extra)), calc((var(--frame-outer-offset) + var(--frame-hover-extra)) * -1));
}

.specimen:hover .specimen__border--middle {
    transform: translate(calc(var(--frame-middle-offset) * var(--scroll-shift, 0) * -1), 0) translate(calc(var(--frame-middle-offset) + var(--frame-hover-extra)), calc((var(--frame-middle-offset) + var(--frame-hover-extra)) * -1));
}

.specimen:hover .specimen__border {
    transition-duration: 300ms;
}

/* --- Corner Marks (crop marks) --- */
.specimen__corner {
    position: absolute;
    width: 12px;
    height: 12px;
    opacity: 0;
    transition: opacity 400ms ease;
    pointer-events: none;
}

.specimen__corner::before,
.specimen__corner::after {
    content: '';
    position: absolute;
    background-color: var(--color-accent);
}

/* Top-left corner */
.specimen__corner--tl {
    top: -1px;
    left: -1px;
}
.specimen__corner--tl::before {
    top: 0;
    left: 0;
    width: 12px;
    height: 1px;
}
.specimen__corner--tl::after {
    top: 0;
    left: 0;
    width: 1px;
    height: 12px;
}

/* Top-right corner */
.specimen__corner--tr {
    top: -1px;
    right: -1px;
}
.specimen__corner--tr::before {
    top: 0;
    right: 0;
    width: 12px;
    height: 1px;
}
.specimen__corner--tr::after {
    top: 0;
    right: 0;
    width: 1px;
    height: 12px;
}

/* Bottom-left corner */
.specimen__corner--bl {
    bottom: -1px;
    left: -1px;
}
.specimen__corner--bl::before {
    bottom: 0;
    left: 0;
    width: 12px;
    height: 1px;
}
.specimen__corner--bl::after {
    bottom: 0;
    left: 0;
    width: 1px;
    height: 12px;
}

/* Bottom-right corner */
.specimen__corner--br {
    bottom: -1px;
    right: -1px;
}
.specimen__corner--br::before {
    bottom: 0;
    right: 0;
    width: 12px;
    height: 1px;
}
.specimen__corner--br::after {
    bottom: 0;
    right: 0;
    width: 1px;
    height: 12px;
}

/* Show corners on hover */
.specimen:hover .specimen__corner {
    opacity: 1;
}

/* --- Specimen Number --- */
.specimen__number {
    position: absolute;
    top: -24px;
    right: 0;
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    z-index: 2;
}

/* --- Image Wrapper --- */
.specimen__image-wrapper {
    position: relative;
    overflow: hidden;
    background-color: var(--color-bg);
    will-change: transform;
    transition: transform var(--transition-exit);
    transform: scale(1);
}

.specimen:hover .specimen__image-wrapper {
    transform: scale(1.03);
    transition-duration: 300ms;
}

/* --- Specimen Images (SVGs) --- */
.specimen__image {
    display: block;
    width: 100%;
    height: auto;
    transition: filter 200ms ease;
}

/* Clip-path notches for glitch effect */
.specimen__image--1 {
    clip-path: polygon(0 0, 48% 0, 48% 2px, 52% 2px, 52% 0, 100% 0, 100% 45%, calc(100% - 2px) 45%, calc(100% - 2px) 48%, 100% 48%, 100% 100%, 55% 100%, 55% calc(100% - 2px), 50% calc(100% - 2px), 50% 100%, 0 100%, 0 52%, 2px 52%, 2px 47%, 0 47%);
}

.specimen__image--2 {
    clip-path: polygon(0 0, 35% 0, 35% 2px, 38% 2px, 38% 0, 100% 0, 100% 60%, calc(100% - 2px) 60%, calc(100% - 2px) 63%, 100% 63%, 100% 100%, 70% 100%, 70% calc(100% - 2px), 67% calc(100% - 2px), 67% 100%, 0 100%, 0 40%, 2px 40%, 2px 36%, 0 36%);
}

.specimen__image--3 {
    clip-path: polygon(0 0, 60% 0, 60% 2px, 63% 2px, 63% 0, 100% 0, 100% 30%, calc(100% - 2px) 30%, calc(100% - 2px) 34%, 100% 34%, 100% 100%, 42% 100%, 42% calc(100% - 2px), 38% calc(100% - 2px), 38% 100%, 0 100%, 0 70%, 2px 70%, 2px 66%, 0 66%);
}

.specimen__image--4 {
    clip-path: polygon(0 0, 25% 0, 25% 2px, 28% 2px, 28% 0, 100% 0, 100% 55%, calc(100% - 2px) 55%, calc(100% - 2px) 58%, 100% 58%, 100% 100%, 75% 100%, 75% calc(100% - 2px), 72% calc(100% - 2px), 72% 100%, 0 100%, 0 45%, 2px 45%, 2px 42%, 0 42%);
}

.specimen__image--5 {
    clip-path: polygon(0 0, 80% 0, 80% 2px, 83% 2px, 83% 0, 100% 0, 100% 20%, calc(100% - 2px) 20%, calc(100% - 2px) 24%, 100% 24%, 100% 100%, 18% 100%, 18% calc(100% - 2px), 15% calc(100% - 2px), 15% 100%, 0 100%, 0 78%, 2px 78%, 2px 75%, 0 75%);
}

.specimen__image--6 {
    clip-path: polygon(0 0, 45% 0, 45% 2px, 48% 2px, 48% 0, 100% 0, 100% 50%, calc(100% - 2px) 50%, calc(100% - 2px) 53%, 100% 53%, 100% 100%, 58% 100%, 58% calc(100% - 2px), 55% calc(100% - 2px), 55% 100%, 0 100%, 0 55%, 2px 55%, 2px 52%, 0 52%);
}

/* Hover flash effect */
.specimen.is-flashing .specimen__image {
    filter: contrast(1.3) brightness(1.1);
}

/* --- Duotone (Specimen 003) --- */
.specimen__image--duotone {
    /* Red-tinted via SVG fill colors already */
}

/* --- Caption --- */
.specimen__caption {
    font-family: var(--font-caption);
    font-weight: 300;
    font-size: clamp(0.625rem, 1vw, 0.8rem);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-top: 12px;
    padding-left: 2px;
}

/* --- Specimen Dividers --- */
.specimen-divider {
    width: 30%;
    height: 1px;
    background-color: var(--color-border-secondary);
    margin: 0 auto;
    position: relative;
}

/* --- Diagonal Slashes --- */
.diagonal-slash {
    display: block;
    width: 15%;
    height: 20vh;
    margin: 0 auto;
    overflow: visible;
    opacity: 0.6;
}

.diagonal-slash--1 { margin-left: 55%; }
.diagonal-slash--2 { margin-left: 20%; }
.diagonal-slash--3 { margin-left: 60%; }
.diagonal-slash--4 { margin-left: 30%; }
.diagonal-slash--5 { margin-left: 50%; }

/* --- Vertical Gap Between Specimens --- */
.specimen:nth-of-type(1) { margin-top: 0; }

.specimen-divider {
    margin-top: 25vh;
    margin-bottom: 25vh;
}

.diagonal-slash {
    margin-top: -20vh;
    margin-bottom: 0;
}

/* Variable gaps for visual rhythm */
.specimen-divider:nth-of-type(1) { margin-top: 30vh; margin-bottom: 30vh; }
.specimen-divider:nth-of-type(2) { margin-top: 25vh; margin-bottom: 25vh; }
.specimen-divider:nth-of-type(3) { margin-top: 35vh; margin-bottom: 35vh; }
.specimen-divider:nth-of-type(4) { margin-top: 28vh; margin-bottom: 28vh; }
.specimen-divider:nth-of-type(5) { margin-top: 32vh; margin-bottom: 32vh; }

/* --- Site Footer --- */
.site-footer {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.site-footer__signature {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    color: var(--color-accent);
}

/* --- Frame Assembly Animation --- */
.specimen .specimen__border--outer,
.specimen .specimen__border--middle {
    transition: transform var(--transition-reveal);
}

.specimen:not(.is-visible) .specimen__border--outer {
    transform: translate(calc(var(--frame-outer-offset) + 20px), calc((var(--frame-outer-offset)) * -1 - 10px));
}

.specimen:not(.is-visible) .specimen__border--middle {
    transform: translate(calc(var(--frame-middle-offset) - 15px), calc((var(--frame-middle-offset)) * -1 + 8px));
}

/* --- Scroll-driven displacement via CSS variable --scroll-shift --- */
/* This variable is set by JavaScript: -1 to 1 range */

/* --- Responsive (max-width: 768px) --- */
@media (max-width: 768px) {
    .site-header {
        top: 1.5rem;
        left: 1.5rem;
    }

    .specimen {
        width: 85%;
    }

    .specimen--left,
    .specimen--right,
    .specimen--center,
    .specimen--offset-left,
    .specimen--offset-right {
        margin-left: auto;
        margin-right: auto;
    }

    :root {
        --frame-outer-offset: 6px;
        --frame-middle-offset: 3px;
        --frame-hover-extra: 2px;
    }

    .specimen-divider {
        margin-top: 15vh;
        margin-bottom: 15vh;
    }

    .diagonal-slash {
        height: 10vh;
        margin-top: -10vh;
    }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    .specimen {
        opacity: 1;
        transition: none;
    }

    .specimen__border {
        transition: none;
    }

    .specimen__image-wrapper {
        transition: none;
        transform: none !important;
    }

    .specimen__corner {
        opacity: 1;
        transition: none;
    }

    .specimen:hover .specimen__image-wrapper {
        transform: none;
    }

    .specimen .specimen__border--outer {
        transform: translate(var(--frame-outer-offset), calc(var(--frame-outer-offset) * -1)) !important;
    }

    .specimen .specimen__border--middle {
        transform: translate(var(--frame-middle-offset), calc(var(--frame-middle-offset) * -1)) !important;
    }

    .specimen:not(.is-visible) .specimen__border--outer,
    .specimen:not(.is-visible) .specimen__border--middle {
        transform: none;
    }
}

/* --- Metadata text color (Dark Concrete #4a4a4a) --- */
.specimen__metadata {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    color: var(--color-dark-concrete);
}

/* --- Selection Color --- */
::selection {
    background-color: var(--color-accent);
    color: var(--color-bg);
}