/* ==========================================================================
   eyes.plus — minimalist, F-pattern, geometric-sans, warm-earthy, sharp-angles
   ========================================================================== */

:root {
    --color-foundation:    #2C2418;  /* Warm Obsidian */
    --color-surface:       #F5EDE0;  /* Parchment Cream */
    --color-accent:        #C4956A;  /* Burnished Copper */
    --color-accent-2:      #A0674B;  /* Terracotta Clay */
    --color-text-primary:  #EDE4D6;  /* Warm Chalk */
    --color-text-secondary:#8C7E6E;  /* Sandstone Gray */
    --color-highlight:     #D4A85C;  /* Amber Lens */
    --color-deep:          #5C3D2A;  /* Roasted Umber */

    --font-display: "Outfit", "Inter", "Helvetica Neue", Arial, sans-serif;
    --font-body:    "Nunito Sans", "Inter", "Helvetica Neue", Arial, sans-serif;

    --ease-optical: cubic-bezier(0.25, 0.46, 0.45, 0.94);

    --f-spine-x: 8vw;
}

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

html, body {
    background-color: var(--color-foundation);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.1vw, 1.15rem);
    line-height: 1.72;
    letter-spacing: 0.01em;
    scroll-behavior: auto;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
    min-height: 100vh;
}

main { display: block; width: 100%; }

/* ==========================================================================
   HERO — Darkened Room
   ========================================================================== */

.hero {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background-color: var(--color-foundation);
}

.hero-stack {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 0 6vw;
}

.domain-name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(3rem, 8vw, 7rem);
    letter-spacing: -0.02em;
    line-height: 1.05;
    color: var(--color-text-primary);
    transition: transform 400ms var(--ease-optical), filter 800ms var(--ease-optical), opacity 800ms var(--ease-optical);
    cursor: default;
    transform: scale(1);
    opacity: 0;
    filter: blur(3px);
}

.domain-name.in-focus {
    opacity: 1;
    filter: blur(0);
}

.domain-name:hover {
    transform: scale(1.03);
}

.optical-baseline {
    width: 280px;
    height: 1px;
    background: var(--color-accent);
    opacity: 0.4;
    margin: 1.75rem auto;
    transform-origin: center;
    transform: scaleX(0);
    transition: transform 700ms var(--ease-optical) 400ms;
}
.optical-baseline.wide { width: 360px; opacity: 0.5; }
.optical-baseline.in-focus { transform: scaleX(1); }

.hero-tagline {
    font-family: var(--font-body);
    font-weight: 300;
    letter-spacing: 0.15em;
    text-transform: lowercase;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    opacity: 0;
    transition: opacity 800ms var(--ease-optical) 700ms;
}
.hero-tagline.in-focus { opacity: 1; }

.hero-meta {
    position: absolute;
    bottom: 3vh;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.6rem;
    color: var(--color-text-secondary);
    font-size: 0.7rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    z-index: 2;
}

.meta-divider { color: var(--color-accent); }

/* concentric circles in hero — golden-ratio upper-right */
.concentric-hero {
    position: absolute;
    top: -8vh;
    right: -8vw;
    width: 60vw;
    max-width: 700px;
    min-width: 360px;
    height: auto;
    opacity: 0.55;
    z-index: 1;
    pointer-events: none;
}

/* ==========================================================================
   FOCUS BAR (slit-lamp gradient line)
   ========================================================================== */

.focus-bar {
    position: relative;
    width: 0%;
    height: 4px;
    margin: 0 auto;
    background: linear-gradient(
        to right,
        rgba(196, 149, 106, 0) 0%,
        rgba(196, 149, 106, 0.85) 50%,
        rgba(196, 149, 106, 0) 100%
    );
    transition: width 600ms ease-out;
}
.focus-bar.lit { width: 100%; }

/* ==========================================================================
   F-BAR sections
   ========================================================================== */

.f-bar {
    position: relative;
    width: 100%;
    min-height: 80vh;
    padding: 14vh 0 12vh;
    background-color: var(--color-foundation);
    overflow: hidden;
}

/* The vertical "F" spine */
.f-spine {
    position: absolute;
    top: 0;
    left: var(--f-spine-x);
    width: 1px;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(196, 149, 106, 0) 0%,
        rgba(196, 149, 106, 0.45) 12%,
        rgba(196, 149, 106, 0.25) 88%,
        rgba(196, 149, 106, 0) 100%
    );
    pointer-events: none;
}

.f-bar-row {
    position: relative;
    display: grid;
    grid-template-columns: 60% 40%;
    gap: 4vw;
    padding-left: calc(var(--f-spine-x) + 2.5vw);
    padding-right: 6vw;
    align-items: start;
}

.f-bar-row.second {
    grid-template-columns: 50% 50%;
}

.section-label {
    display: inline-block;
    font-family: var(--font-body);
    font-weight: 600;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    font-size: 0.7rem;
    color: var(--color-accent);
    margin-bottom: 1.2rem;
}

.section-label.centered { display: block; text-align: center; }

.section-heading {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.8rem, 2.8vw, 2.8rem);
    letter-spacing: -0.02em;
    line-height: 1.05;
    color: var(--color-text-primary);
    max-width: 22ch;
    transition: transform 350ms var(--ease-optical);
}
.section-heading:hover { transform: scale(1.04); }

.bar-text-block {
    max-width: 38ch;
    color: var(--color-text-primary);
    font-size: 1.1rem;
}
.bar-text-block.narrow { max-width: 32ch; }
.bar-text-block p + p { margin-top: 1rem; }

/* sharp-angle decorative element on second F-bar */
.sharp-angle {
    position: absolute;
    top: 8vh;
    left: calc(var(--f-spine-x) - 22px);
    width: 0;
    height: 0;
    border-left: 18px solid transparent;
    border-right: 18px solid transparent;
    border-bottom: 28px solid var(--color-accent);
    transform: rotate(45deg);
    opacity: 0.85;
}

/* Snellen typographic decoration */
.snellen-stack {
    margin-top: 8vh;
    margin-left: calc(var(--f-spine-x) + 2.5vw);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.45rem;
    font-family: var(--font-display);
    color: var(--color-text-primary);
    letter-spacing: 0.35em;
    line-height: 1;
}

.snellen-row {
    display: block;
    text-transform: uppercase;
}

/* ==========================================================================
   LENS DIVIDER (vesica piscis)
   ========================================================================== */

.lens-divider {
    width: 100%;
    display: flex;
    justify-content: center;
    padding: 4vh 0;
    background-color: var(--color-foundation);
}

/* ==========================================================================
   DESCENDING STEM
   ========================================================================== */

.descending-stem {
    position: relative;
    width: 100%;
    min-height: 110vh;
    padding: 12vh 0 14vh;
    background-color: var(--color-foundation);
    overflow: hidden;
}

.stem-content {
    position: relative;
    z-index: 2;
    width: 40%;
    padding-left: calc(var(--f-spine-x) + 2.5vw);
    padding-right: 2vw;
}

.stem-block {
    margin-bottom: 7vh;
    max-width: 32ch;
}

.stem-heading {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.4rem, 2vw, 1.9rem);
    letter-spacing: -0.02em;
    line-height: 1.1;
    color: var(--color-text-primary);
    margin: 0.6rem 0 0.9rem;
    transition: transform 350ms var(--ease-optical);
}
.stem-heading:hover { transform: scale(1.04); }

.stem-block p {
    color: var(--color-text-primary);
    opacity: 0.92;
    font-size: 1.05rem;
}

.stem-margin {
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    pointer-events: none;
}

.concentric-stem {
    position: absolute;
    top: 50%;
    right: 6vw;
    width: 36vw;
    max-width: 520px;
    min-width: 280px;
    height: auto;
    transform: translateY(-50%);
    opacity: 0.85;
}

#concentricStemGroup {
    transform-origin: 200px 200px;
    transform-box: fill-box;
}

/* sparse diagonal accents */
.diagonal-mark {
    position: absolute;
    width: 90px;
    height: 1px;
    background: var(--color-accent);
    opacity: 0.55;
}
.diagonal-mark.mark-30 {
    top: 18%;
    right: 10vw;
    transform: rotate(30deg);
}
.diagonal-mark.mark-60 {
    bottom: 18%;
    right: 24vw;
    transform: rotate(60deg);
    opacity: 0.4;
}

/* ==========================================================================
   RESOLUTION (final)
   ========================================================================== */

.resolution {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-foundation);
    overflow: hidden;
    padding: 14vh 0;
}

.concentric-final {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80vw;
    max-width: 760px;
    height: auto;
    opacity: 0.7;
    z-index: 1;
    pointer-events: none;
}

.resolution-stack {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 6vw;
}

.resolution-statement {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2.4rem, 5.5vw, 4.6rem);
    letter-spacing: -0.02em;
    line-height: 1.05;
    color: var(--color-text-primary);
    transition: transform 400ms var(--ease-optical);
}
.resolution-statement:hover { transform: scale(1.03); }

.resolution-tag {
    margin-top: 1.5rem;
    color: var(--color-text-secondary);
    font-weight: 300;
    letter-spacing: 0.2em;
    text-transform: lowercase;
    font-size: 0.95rem;
}

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

.site-foot {
    width: 100%;
    padding: 4vh 6vw;
    display: flex;
    justify-content: center;
    gap: 1.2rem;
    align-items: center;
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    background-color: var(--color-foundation);
    border-top: 1px solid rgba(196, 149, 106, 0.18);
}

.foot-divider {
    width: 28px;
    height: 1px;
    background: var(--color-accent);
    opacity: 0.6;
}

/* ==========================================================================
   REVEAL: fade-in with directional shift (left -> right, F-pattern flow)
   ========================================================================== */

.reveal {
    opacity: 0;
    transform: translateX(-16px);
    transition: opacity 500ms var(--ease-optical), transform 500ms var(--ease-optical);
}
.reveal.visible {
    opacity: 1;
    transform: translateX(0);
}

/* stagger via custom property */
.reveal[data-stagger="1"] { transition-delay: 0ms; }
.reveal[data-stagger="2"] { transition-delay: 120ms; }
.reveal[data-stagger="3"] { transition-delay: 240ms; }
.reveal[data-stagger="4"] { transition-delay: 360ms; }

/* ==========================================================================
   RESPONSIVE — 768px and 480px
   ========================================================================== */

@media (max-width: 768px) {
    :root { --f-spine-x: 6vw; }

    .f-bar-row,
    .f-bar-row.second {
        grid-template-columns: 1fr;
        gap: 2.5rem;
        padding-left: calc(var(--f-spine-x) + 1.5rem);
        padding-right: 6vw;
    }

    .stem-content {
        width: 100%;
        padding-left: calc(var(--f-spine-x) + 1.5rem);
        padding-right: 6vw;
    }

    .stem-margin { width: 100%; opacity: 0.5; }

    .concentric-stem {
        right: -10vw;
        width: 70vw;
        max-width: 360px;
        min-width: 220px;
    }

    .concentric-hero {
        right: -20vw;
        width: 90vw;
    }

    .snellen-stack { margin-left: calc(var(--f-spine-x) + 1.5rem); }

    .hero-meta { font-size: 0.6rem; }
}

@media (max-width: 480px) {
    .hero-stack { padding: 0 5vw; }
    .domain-name { font-size: clamp(2.6rem, 12vw, 4rem); }
    .optical-baseline { width: 200px; }
    .section-heading { font-size: 1.6rem; }
    .stem-heading { font-size: 1.3rem; }
    .resolution-statement { font-size: clamp(2rem, 9vw, 3rem); }
    .snellen-stack { letter-spacing: 0.25em; }
    .diagonal-mark { display: none; }
}