/* =============================================
   namu.club - Retro-Futuristic Tree Community
   Chrome-metallic + Nature palette
   Broken-grid layout
   ============================================= */

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

:root {
    --chrome-silver: #C0C8D0;
    --chrome-dark: #3A4048;
    --star-gold: #D8B850;
    --branch-green: #5A8848;
    --bark-umber: #6A4A30;
    --sky-pale: #E8ECF0;
    --retro-orange: #D87840;
    --chrome-mid: #808890;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 400;
    font-size: clamp(14px, 1vw, 16px);
    line-height: 1.75;
    color: var(--chrome-dark);
    background: var(--sky-pale);
    overflow-x: hidden;
    position: relative;
}

h1, h2, h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    letter-spacing: -0.01em;
}

/* === Star-Celestial Canopy (fixed background layer) === */
#star-canopy {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 30vh;
    z-index: 0;
    pointer-events: none;
    opacity: 0;
    transition: opacity 1.2s ease;
}

#star-canopy.visible {
    opacity: 1;
}

.star-dot {
    position: absolute;
    width: 2px;
    height: 2px;
    border-radius: 50%;
    background: var(--star-gold);
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

.star-dot.bright {
    opacity: 1;
}

/* === Trunk Opening (Hero) === */
#trunk-opening {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    background: linear-gradient(180deg, var(--chrome-silver) 0%, var(--chrome-mid) 60%, var(--chrome-dark) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    z-index: 1;
}

#tree-container {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    max-width: 700px;
    height: 80%;
    z-index: 1;
    pointer-events: none;
}

#geometric-tree {
    width: 100%;
    height: 100%;
}

#geometric-tree #trunk {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    transition: stroke-dashoffset 0.8s ease-out;
}

#geometric-tree #trunk.drawn {
    stroke-dashoffset: 0;
}

#geometric-tree .branch {
    stroke-dasharray: 500;
    stroke-dashoffset: 500;
    transition: stroke-dashoffset 0.6s ease-out;
}

#geometric-tree .branch.drawn {
    stroke-dashoffset: 0;
}

#geometric-tree .leaf {
    stroke-dasharray: 100;
    stroke-dashoffset: 100;
    transition: stroke-dashoffset 0.4s ease-out;
}

#geometric-tree .leaf.drawn {
    stroke-dashoffset: 0;
}

#hero-text {
    position: relative;
    z-index: 2;
    text-align: center;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

#hero-text.visible {
    opacity: 1;
    transform: translateY(0);
}

#club-name {
    font-size: clamp(36px, 6vw, 72px);
    color: var(--sky-pale);
    letter-spacing: -0.02em;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

#korean-name {
    font-family: 'Noto Sans KR', sans-serif;
    font-weight: 500;
    font-size: clamp(18px, 2.5vw, 32px);
    color: var(--star-gold);
    margin-top: 0.25em;
    letter-spacing: 0.05em;
}

#club-tagline {
    font-size: clamp(13px, 1.2vw, 18px);
    color: var(--chrome-silver);
    margin-top: 1em;
    letter-spacing: 0.02em;
    font-weight: 400;
}

/* === Branch Content Section (broken-grid) === */
#branch-content {
    position: relative;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 20px 120px;
    min-height: 100vh;
    z-index: 1;
}

#branch-connections {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.branch-block {
    position: relative;
    width: clamp(280px, 40%, 480px);
    padding: 36px 32px;
    margin-bottom: 60px;
    background: rgba(232, 236, 240, 0.92);
    border: 1px solid var(--chrome-silver);
    border-radius: 4px;
    z-index: 1;
    opacity: 0;
    transition: opacity 0.4s ease, transform 0.4s ease, box-shadow 0.3s ease;
}

.branch-block.visible {
    opacity: 1;
}

.branch-block:hover {
    box-shadow: 0 4px 24px rgba(58, 64, 72, 0.12);
}

/* Broken-grid positioning via data-offset */
.branch-block[data-offset="left-far"] {
    margin-left: 5%;
    transform: translateX(-20px);
}
.branch-block[data-offset="left-far"].visible {
    transform: translateX(0);
}

.branch-block[data-offset="right-near"] {
    margin-left: 45%;
    transform: translateX(20px);
}
.branch-block[data-offset="right-near"].visible {
    transform: translateX(0);
}

.branch-block[data-offset="left-near"] {
    margin-left: 15%;
    transform: translateX(-20px);
}
.branch-block[data-offset="left-near"].visible {
    transform: translateX(0);
}

.branch-block[data-offset="right-far"] {
    margin-left: 55%;
    transform: translateX(20px);
}
.branch-block[data-offset="right-far"].visible {
    transform: translateX(0);
}

.branch-block[data-offset="center-left"] {
    margin-left: 10%;
    transform: translateX(-20px);
}
.branch-block[data-offset="center-left"].visible {
    transform: translateX(0);
}

.branch-block[data-offset="center-right"] {
    margin-left: 48%;
    transform: translateX(20px);
}
.branch-block[data-offset="center-right"].visible {
    transform: translateX(0);
}

/* Hover: shift toward central trunk (50%) */
.branch-block[data-offset="left-far"]:hover { transform: translateX(4px); }
.branch-block[data-offset="left-near"]:hover { transform: translateX(4px); }
.branch-block[data-offset="center-left"]:hover { transform: translateX(4px); }
.branch-block[data-offset="right-near"]:hover { transform: translateX(-4px); }
.branch-block[data-offset="right-far"]:hover { transform: translateX(-4px); }
.branch-block[data-offset="center-right"]:hover { transform: translateX(-4px); }

/* Chrome-metallic panel */
.branch-block.chrome-panel {
    background: linear-gradient(135deg, #D0D6DC 0%, #B8C0C8 25%, #C8CED6 50%, #A8B0B8 75%, #C0C8D0 100%);
    border-color: var(--chrome-mid);
}

.branch-block.chrome-panel:hover {
    background: linear-gradient(150deg, #D0D6DC 0%, #B8C0C8 25%, #C8CED6 50%, #A8B0B8 75%, #C0C8D0 100%);
}

.branch-label {
    display: inline-block;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 500;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--branch-green);
    margin-bottom: 12px;
    padding: 4px 10px;
    border: 1px solid var(--branch-green);
    border-radius: 2px;
}

.branch-block h2 {
    font-size: clamp(20px, 2.5vw, 32px);
    color: var(--chrome-dark);
    margin-bottom: 12px;
}

.branch-block p {
    color: var(--chrome-dark);
    opacity: 0.85;
}

/* Branch connection lines */
.connection-line {
    fill: none;
    stroke: var(--branch-green);
    stroke-width: 1.5;
    stroke-dasharray: 500;
    stroke-dashoffset: 500;
    transition: stroke-dashoffset 0.6s ease, stroke-width 0.3s ease, stroke 0.3s ease;
}

.connection-line.drawn {
    stroke-dashoffset: 0;
}

.connection-line.highlight {
    stroke-width: 2.5;
    stroke: var(--star-gold);
}

.connection-node {
    fill: var(--branch-green);
    r: 4;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.connection-node.visible {
    opacity: 1;
}

/* === Membership Section === */
#membership-section {
    position: relative;
    width: 100%;
    padding: 100px 20px 120px;
    background: linear-gradient(180deg, var(--sky-pale) 0%, var(--chrome-silver) 100%);
    text-align: center;
    z-index: 1;
}

#membership-title {
    font-size: clamp(28px, 4vw, 56px);
    color: var(--chrome-dark);
    margin-bottom: 8px;
}

#membership-subtitle {
    font-size: clamp(14px, 1.2vw, 18px);
    color: var(--chrome-mid);
    margin-bottom: 60px;
}

#membership-cards {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    max-width: 1000px;
    margin: 0 auto;
}

.membership-card {
    position: relative;
    width: 280px;
    min-height: 320px;
    padding: 3px;
    background: transparent;
}

.card-inner {
    width: 100%;
    height: 100%;
    padding: 36px 28px;
    background: var(--sky-pale);
    border-radius: 4px;
    text-align: left;
    position: relative;
}

/* Border-animate effect */
.membership-card::before,
.membership-card::after {
    content: '';
    position: absolute;
    background: var(--retro-orange);
}

/* Top + Right borders */
.membership-card::before {
    top: 0;
    left: 0;
    width: 0;
    height: 2px;
    transition: none;
}

/* Bottom + Left borders */
.membership-card::after {
    bottom: 0;
    right: 0;
    width: 0;
    height: 2px;
    transition: none;
}

.membership-card.animate-border::before {
    animation: borderTopRight 0.6s ease forwards;
}

.membership-card.animate-border::after {
    animation: borderBottomLeft 0.6s ease 0.6s forwards;
}

/* Additional pseudo for vertical borders via inner element */
.card-inner::before,
.card-inner::after {
    content: '';
    position: absolute;
    background: var(--retro-orange);
}

.card-inner::before {
    top: 0;
    right: -3px;
    width: 2px;
    height: 0;
    transition: none;
}

.card-inner::after {
    bottom: -3px;
    left: 0;
    width: 2px;
    height: 0;
    transition: none;
}

.membership-card.animate-border .card-inner::before {
    animation: borderRightDown 0.6s ease 0.3s forwards;
}

.membership-card.animate-border .card-inner::after {
    animation: borderLeftUp 0.6s ease 0.9s forwards;
}

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

@keyframes borderRightDown {
    from { height: 0; }
    to { height: calc(100% + 6px); }
}

@keyframes borderBottomLeft {
    from { width: 0; right: 0; left: auto; }
    to { width: 100%; right: 0; left: auto; }
}

@keyframes borderLeftUp {
    from { height: 0; bottom: -3px; top: auto; }
    to { height: calc(100% + 6px); bottom: -3px; top: auto; }
}

.card-tier {
    display: inline-block;
    font-weight: 500;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--retro-orange);
    margin-bottom: 8px;
}

.card-inner h3 {
    font-size: clamp(18px, 2vw, 24px);
    color: var(--chrome-dark);
    margin-bottom: 16px;
}

.card-inner ul {
    list-style: none;
    padding: 0;
}

.card-inner li {
    position: relative;
    padding-left: 18px;
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--chrome-dark);
    opacity: 0.85;
    line-height: 1.6;
}

.card-inner li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--branch-green);
}

/* === Footer === */
#site-footer {
    position: relative;
    width: 100%;
    padding: 60px 20px;
    background: var(--chrome-dark);
    z-index: 1;
}

#footer-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

#footer-name {
    font-size: clamp(20px, 2.5vw, 28px);
    font-weight: 700;
    color: var(--sky-pale);
    letter-spacing: -0.01em;
}

.footer-korean {
    font-family: 'Noto Sans KR', sans-serif;
    font-weight: 500;
    color: var(--star-gold);
    font-size: 0.8em;
}

#footer-motto {
    font-size: 14px;
    color: var(--chrome-silver);
    margin-top: 8px;
    font-style: italic;
}

#footer-links {
    display: flex;
    justify-content: center;
    gap: 28px;
    margin-top: 28px;
    flex-wrap: wrap;
}

#footer-links span {
    font-size: 13px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--chrome-mid);
    cursor: pointer;
    transition: color 0.3s ease;
}

#footer-links span:hover {
    color: var(--star-gold);
}

/* === Responsive === */
@media (max-width: 768px) {
    .branch-block {
        width: 90%;
        margin-left: 5% !important;
    }

    .branch-block[data-offset="left-far"],
    .branch-block[data-offset="right-near"],
    .branch-block[data-offset="left-near"],
    .branch-block[data-offset="right-far"],
    .branch-block[data-offset="center-left"],
    .branch-block[data-offset="center-right"] {
        margin-left: 5% !important;
    }

    #membership-cards {
        flex-direction: column;
        align-items: center;
    }

    #tree-container {
        width: 90%;
    }
}

@media (max-width: 480px) {
    .branch-block {
        padding: 24px 20px;
    }

    .membership-card {
        width: 90%;
    }

    #footer-links {
        gap: 16px;
    }
}