/* === hwakryul.com - Probability Engineering Blueprint === */
/* Colors: #FAFCFF, #6A9ADA, #2A5CAA, #E8F0FF, #1A3A6A, #D4261A, #3D3D4A, #B8C8E8 */
/* Fonts: Share Tech Mono (display), Fira Sans (body) */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background-color: #FAFCFF;
    color: #3D3D4A;
    font-family: 'Fira Sans', sans-serif;
    font-weight: 400;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* === Blueprint Grid Background === */
#blueprint-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    background-image:
        linear-gradient(to right, rgba(184, 200, 232, 0.08) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(184, 200, 232, 0.08) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* === Construction Lines === */
#construction-lines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.cline {
    position: absolute;
    background-color: rgba(42, 92, 170, 0.06);
}

.cline-h {
    height: 1px;
    width: 0;
    left: 0;
}

.cline-v {
    width: 1px;
    height: 0;
    top: 0;
}

.cline-h1 { top: 25%; }
.cline-h2 { top: 50%; }
.cline-h3 { top: 75%; }
.cline-v1 { left: 25%; }
.cline-v2 { left: 50%; }
.cline-v3 { left: 75%; }

.cline-h.animate {
    animation: drawHorizontal 0.8s ease-out forwards;
}

.cline-v.animate {
    animation: drawVertical 0.8s ease-out forwards;
}

@keyframes drawHorizontal {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes drawVertical {
    from { height: 0; }
    to { height: 100%; }
}

/* === Section Base === */
.section {
    position: relative;
    z-index: 2;
    max-width: 1440px;
    margin: 0 auto;
    padding: 60px 40px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === Title Block (Hero) === */
#title-block {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 80px 40px;
}

.title-block-border {
    border: 2px solid #2A5CAA;
    padding: 4px;
    max-width: 800px;
    width: 100%;
}

.title-block-inner {
    border: 1px solid #2A5CAA;
    padding: 48px 56px;
    position: relative;
}

.title-revision {
    position: absolute;
    top: 12px;
    right: 16px;
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.revision-label {
    font-family: 'Share Tech Mono', monospace;
    font-size: 12px;
    color: #B8C8E8;
    letter-spacing: 0.1em;
}

.revision-number {
    font-family: 'Share Tech Mono', monospace;
    font-size: 20px;
    color: #2A5CAA;
}

.title-main {
    font-family: 'Share Tech Mono', monospace;
    font-size: 48px;
    font-weight: 400;
    line-height: 1.15;
    color: #1A3A6A;
    letter-spacing: 0.08em;
    margin-bottom: 32px;
}

.title-sub {
    color: #2A5CAA;
    font-size: 36px;
}

.title-meta {
    border-top: 1px solid #B8C8E8;
    padding-top: 16px;
    margin-bottom: 24px;
    display: flex;
    gap: 40px;
}

.meta-row {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.meta-label {
    font-family: 'Share Tech Mono', monospace;
    font-size: 10px;
    color: #B8C8E8;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.meta-value {
    font-family: 'Share Tech Mono', monospace;
    font-size: 14px;
    color: #2A5CAA;
}

.title-description p {
    font-family: 'Fira Sans', sans-serif;
    font-size: 15px;
    font-weight: 300;
    color: #3D3D4A;
    line-height: 1.7;
    max-width: 500px;
}

/* === Dimension Lines === */
.dimension-line {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 24px;
    justify-content: center;
}

.dim-arrow {
    display: block;
    width: 60px;
    height: 1px;
    background-color: #B8C8E8;
    position: relative;
}

.dim-arrow-left::before,
.dim-arrow-right::after {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    top: -3px;
}

.dim-arrow-left::before {
    left: 0;
    border-right: 6px solid #B8C8E8;
    border-top: 3px solid transparent;
    border-bottom: 3px solid transparent;
}

.dim-arrow-right::after {
    right: 0;
    border-left: 6px solid #B8C8E8;
    border-top: 3px solid transparent;
    border-bottom: 3px solid transparent;
}

.dim-text {
    font-family: 'Share Tech Mono', monospace;
    font-size: 11px;
    color: #B8C8E8;
}

/* === Module Blocks === */
.module-block {
    border: 1px solid rgba(42, 92, 170, 0.15);
    margin: 40px auto;
    padding: 40px;
    background-color: rgba(250, 252, 255, 0.95);
}

.module-header {
    display: flex;
    align-items: baseline;
    gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(42, 92, 170, 0.15);
}

.module-number {
    font-family: 'Share Tech Mono', monospace;
    font-size: 32px;
    color: #B8C8E8;
    line-height: 1;
}

.module-title {
    font-family: 'Share Tech Mono', monospace;
    font-size: 20px;
    font-weight: 400;
    color: #2A5CAA;
    letter-spacing: 0.1em;
}

.module-annotation {
    font-family: 'Fira Sans', sans-serif;
    font-size: 13px;
    font-weight: 300;
    color: #6A9ADA;
    font-style: italic;
    margin-left: auto;
}

/* === Module Content === */
.module-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: start;
}

.diagram-container {
    width: 100%;
}

.diagram-container svg {
    width: 100%;
    height: auto;
}

.module-text {
    padding-top: 8px;
}

.formula {
    font-family: 'Share Tech Mono', monospace;
    font-size: 16px;
    color: #1A3A6A;
    background-color: #E8F0FF;
    padding: 12px 16px;
    border-left: 3px solid #D4261A;
    margin-bottom: 16px;
    letter-spacing: 0.02em;
}

.description {
    font-family: 'Fira Sans', sans-serif;
    font-size: 14px;
    font-weight: 300;
    color: #3D3D4A;
    line-height: 1.7;
}

/* === SVG Text Styles === */
.svg-label {
    font-family: 'Share Tech Mono', monospace;
    font-size: 16px;
    fill: #2A5CAA;
}

.svg-label-dim {
    font-family: 'Share Tech Mono', monospace;
    font-size: 14px;
    fill: #B8C8E8;
}

.svg-small-label {
    font-family: 'Fira Sans', sans-serif;
    font-size: 11px;
    fill: #3D3D4A;
}

.svg-small-label.dim {
    fill: #B8C8E8;
}

.svg-annotation {
    font-family: 'Share Tech Mono', monospace;
    font-size: 13px;
    fill: #D4261A;
}

.svg-result {
    font-family: 'Share Tech Mono', monospace;
    font-size: 14px;
    fill: #D4261A;
    font-weight: 400;
}

.svg-state-label {
    font-family: 'Share Tech Mono', monospace;
    font-size: 18px;
    fill: #2A5CAA;
}

.svg-mono {
    font-family: 'Share Tech Mono', monospace;
    font-size: 10px;
    fill: #3D3D4A;
}

/* === Isometric Chart === */
.isometric-chart {
    width: 100%;
    height: 280px;
    position: relative;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 8px;
    padding-bottom: 20px;
}

.iso-bar-group {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.iso-bar {
    width: 36px;
    border: 2px solid #2A5CAA;
    background: transparent;
    position: relative;
    transition: height 1s ease;
}

.iso-bar-top {
    width: 36px;
    height: 12px;
    border: 2px solid #2A5CAA;
    border-bottom: none;
    transform: skewX(-30deg);
    position: relative;
    top: 2px;
    background-color: rgba(42, 92, 170, 0.05);
}

.iso-bar-side {
    width: 12px;
    border: 2px solid rgba(42, 92, 170, 0.5);
    border-left: none;
    transform: skewY(-30deg);
    position: absolute;
    right: -14px;
    bottom: 6px;
    background-color: rgba(42, 92, 170, 0.03);
}

.iso-bar-label {
    font-family: 'Share Tech Mono', monospace;
    font-size: 10px;
    color: #B8C8E8;
    margin-top: 6px;
    text-align: center;
}

/* === Dimension Annotation === */
.dimension-annotation {
    text-align: right;
    margin-top: 12px;
}

.dim-label {
    font-family: 'Share Tech Mono', monospace;
    font-size: 11px;
    color: #B8C8E8;
    letter-spacing: 0.05em;
}

/* === CLT Curves === */
.clt-curves {
    width: 100%;
    height: 250px;
}

.clt-curves svg {
    width: 100%;
    height: 100%;
}

/* === Revision Table === */
#revision-table {
    border-top: 2px solid #2A5CAA;
    margin-top: 80px;
    padding-top: 40px;
}

.rev-table {
    max-width: 800px;
    margin: 0 auto;
    border: 1px solid #2A5CAA;
}

.rev-header {
    display: grid;
    grid-template-columns: 60px 120px 1fr 80px;
    background-color: #E8F0FF;
    border-bottom: 1px solid #2A5CAA;
}

.rev-header span {
    font-family: 'Share Tech Mono', monospace;
    font-size: 11px;
    color: #1A3A6A;
    padding: 10px 12px;
    letter-spacing: 0.1em;
}

.rev-row {
    display: grid;
    grid-template-columns: 60px 120px 1fr 80px;
    border-bottom: 1px solid rgba(42, 92, 170, 0.15);
}

.rev-row:last-child {
    border-bottom: none;
}

.rev-row span {
    font-family: 'Share Tech Mono', monospace;
    font-size: 12px;
    color: #3D3D4A;
    padding: 10px 12px;
}

/* === Footer Stamp === */
.footer-stamp {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
}

.stamp-text {
    font-family: 'Share Tech Mono', monospace;
    font-size: 14px;
    color: #D4261A;
    letter-spacing: 0.2em;
    border: 2px solid #D4261A;
    padding: 12px 32px;
    display: inline-block;
    transform: rotate(-2deg);
    opacity: 0.7;
}

/* === Animations === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes drawLine {
    from { stroke-dashoffset: 1000; }
    to { stroke-dashoffset: 0; }
}

/* === Responsive === */
@media (max-width: 900px) {
    .module-content {
        grid-template-columns: 1fr;
    }

    .title-main {
        font-size: 32px;
    }

    .title-sub {
        font-size: 24px;
    }

    .title-meta {
        flex-direction: column;
        gap: 12px;
    }

    .module-header {
        flex-wrap: wrap;
    }

    .module-annotation {
        margin-left: 0;
        width: 100%;
    }

    .rev-header,
    .rev-row {
        grid-template-columns: 40px 90px 1fr 60px;
    }
}

@media (max-width: 600px) {
    .section {
        padding: 40px 20px;
    }

    .module-block {
        padding: 24px 16px;
    }

    .title-block-inner {
        padding: 32px 24px;
    }

    .title-main {
        font-size: 24px;
    }

    .title-sub {
        font-size: 18px;
    }
}