/* =============================================================================
   Landing — hand-drawn / sketchy. Same cutting-board metaphor (warm wood,
   copper accent), but the surface now reads like a notebook page: handwritten
   headings, wobbly borders, sticky-notes pinned with tape. Layout still
   collapses to a single readable column on mobile.
   ============================================================================= */

:root {
    --font-hand: "Caveat", "Patrick Hand", "Kalam", cursive;
    --font-hand-body: "Patrick Hand", "Kalam", "Caveat", cursive;
    /* asymmetric border radii — five+ values create an organic blob outline */
    --blob-1: 18px 22px 14px 26px / 22px 14px 24px 18px;
    --blob-2: 24px 16px 28px 14px / 14px 26px 16px 22px;
    --blob-3: 12px 28px 18px 22px / 26px 14px 22px 18px;
}

/* -----------------------------------------------------------------------------
   Page surface — paper texture using two layered gradients (no image needed).
   Subtle enough not to fight the warm-wood palette.
   --------------------------------------------------------------------------- */
.landing-body {
    background:
        radial-gradient(circle at 20% 10%, rgba(192, 133, 82, 0.06), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(212, 155, 106, 0.05), transparent 45%),
        repeating-linear-gradient(
            0deg,
            transparent 0,
            transparent 38px,
            rgba(192, 133, 82, 0.035) 38px,
            rgba(192, 133, 82, 0.035) 39px
        ),
        var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    margin: 0;
    min-height: 100vh;
    line-height: 1.7;
    overflow-x: hidden;
}

.doodle-defs {
    position: absolute;
    width: 0;
    height: 0;
    pointer-events: none;
}

/* -----------------------------------------------------------------------------
   Header
   --------------------------------------------------------------------------- */
.landing-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2rem;
    max-width: 860px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.landing-header .brand img {
    transition: transform var(--transition-normal);
}
.landing-header .brand:hover img {
    transform: rotate(-2deg);
}

.landing-header nav {
    display: flex;
    gap: 1.4rem;
    align-items: center;
}

.landing-header .nav-link {
    font-family: var(--font-hand);
    font-size: 1.35rem;
    color: var(--text);
    text-decoration: none;
    position: relative;
    padding: 0.1rem 0.3rem;
    transition: color var(--transition-fast);
}
.landing-header .nav-link::after {
    content: "";
    position: absolute;
    left: 4%;
    right: 8%;
    bottom: 0;
    height: 6px;
    background:
        radial-gradient(circle at 10% 60%, var(--primary) 1px, transparent 1.5px) 0 0/8px 6px,
        linear-gradient(90deg, transparent 0%, var(--primary-glow) 50%, transparent 100%);
    transform: scaleX(0) skewX(-12deg);
    transform-origin: left;
    transition: transform 0.25s ease;
}
.landing-header .nav-link:hover::after { transform: scaleX(1) skewX(-12deg); }

.landing-header .github-link {
    color: var(--text-secondary);
    transition: transform var(--transition-fast), color var(--transition-fast);
    display: inline-flex;
}
.landing-header .github-link:hover {
    color: var(--text);
    transform: rotate(-8deg) scale(1.1);
}

/* -----------------------------------------------------------------------------
   Main column
   --------------------------------------------------------------------------- */
.landing-main {
    max-width: 760px;
    margin: 0 auto;
    padding: 1.5rem 2rem 4rem;
    position: relative;
    z-index: 1;
}

/* -----------------------------------------------------------------------------
   Hero
   --------------------------------------------------------------------------- */
.landing-hero {
    position: relative;
    margin: 1.5rem 0 3rem;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-hand);
    font-size: 1.4rem;
    color: var(--primary);
    transform: rotate(-1.2deg);
    margin-bottom: 0.4rem;
}
.hero-eyebrow svg {
    width: 60px;
    height: 12px;
    color: var(--primary);
}

.hero-title {
    font-family: var(--font-hand);
    font-weight: 700;
    font-size: clamp(2.6rem, 6vw, 4.2rem);
    line-height: 1.05;
    letter-spacing: -0.005em;
    color: var(--text);
    margin: 0.2rem 0 1rem;
}

/* highlighter / marker effect — a smudgy band behind the words */
.hl-marker {
    position: relative;
    display: inline-block;
    color: var(--text);
    padding: 0 0.15em;
    z-index: 0;
}
.hl-marker::before {
    content: "";
    position: absolute;
    inset: 18% -2% 8% -2%;
    background: linear-gradient(
        100deg,
        rgba(192, 133, 82, 0.55) 0%,
        rgba(212, 155, 106, 0.65) 40%,
        rgba(192, 133, 82, 0.5) 70%,
        rgba(154, 107, 63, 0.55) 100%
    );
    border-radius: 60% 40% 55% 45% / 50% 55% 45% 50%;
    transform: rotate(-1deg) skewX(-3deg);
    z-index: -1;
    filter: blur(0.4px);
}

.hero-tagline {
    font-family: var(--font-hand-body);
    font-size: 1.5rem;
    line-height: 1.5;
    color: var(--text-secondary);
    margin: 0.4rem 0 2rem;
    max-width: 36ch;
}

/* sketchy underline drawn with a rough gradient — "ink" feel */
.ink-underline {
    position: relative;
    color: var(--text);
    display: inline-block;
}
.ink-underline::after {
    content: "";
    position: absolute;
    left: -2%;
    right: -2%;
    bottom: -4px;
    height: 7px;
    background:
        radial-gradient(circle at 20% 60%, var(--primary) 1px, transparent 1.5px) 0 1px/10px 5px,
        linear-gradient(90deg, transparent 0, var(--primary) 6%, var(--primary) 92%, transparent 100%) 0 4px/100% 2px no-repeat;
    transform: rotate(-0.6deg);
    opacity: 0.85;
}
.ink-underline:nth-of-type(2)::after { transform: rotate(0.8deg); }
.ink-underline:nth-of-type(3)::after { transform: rotate(-1.2deg); }

.hero-aside {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-hand);
    font-size: 1.25rem;
    color: var(--text-muted);
    transform: rotate(-1.5deg);
    margin-top: 0.5rem;
}
.hero-aside .aside-arrow {
    width: 60px;
    height: 44px;
    color: var(--primary-dim);
    color: var(--primary);
    opacity: 0.8;
    flex-shrink: 0;
}

/* -----------------------------------------------------------------------------
   Sketchy buttons (organic blob borders)
   --------------------------------------------------------------------------- */
.landing-cta-row {
    display: flex;
    gap: 0.9rem;
    margin: 0.8rem 0 1.6rem;
    flex-wrap: wrap;
    align-items: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.4rem;
    font-family: var(--font-hand);
    font-size: 1.4rem;
    font-weight: 500;
    text-decoration: none;
    transition:
        transform var(--transition-fast),
        background var(--transition-fast),
        color var(--transition-fast),
        box-shadow var(--transition-fast),
        border-radius 0.4s ease;
    border: 2px solid var(--text);
    background: transparent;
    color: var(--text);
    line-height: 1;
}

.btn-sketch {
    border-radius: var(--blob-1);
    box-shadow: 3px 3px 0 var(--text);
    position: relative;
}
.btn-sketch:hover {
    transform: translate(-1px, -1px) rotate(-1deg);
    box-shadow: 5px 5px 0 var(--text);
    border-radius: var(--blob-2);
}
.btn-sketch:active {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0 var(--text);
}

.btn-primary {
    background: var(--primary);
    color: var(--bg);
    border-color: var(--text);
}
.btn-primary:hover {
    background: var(--primary-hover);
    color: var(--bg);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
}
.btn-ghost:hover {
    background: var(--bg-elevated);
    color: var(--text);
}

.btn-arrow {
    width: 30px;
    height: 12px;
    transition: transform var(--transition-fast);
}
.btn-sketch:hover .btn-arrow { transform: translateX(3px); }

/* -----------------------------------------------------------------------------
   Plain-text "note" sections (the prose paragraphs)
   --------------------------------------------------------------------------- */
.landing-note {
    margin: 2rem 0;
}

.landing-note p {
    color: var(--text-secondary);
    font-size: 1.02rem;
    margin: 1.1rem 0;
    line-height: 1.75;
}

.landing-note code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--bg-elevated);
    color: var(--primary-light);
    padding: 0.1em 0.4em;
    border-radius: 3px 8px 4px 9px / 8px 4px 9px 3px;
    border: 1px dashed var(--border-light);
}

.landing-note .meaning {
    font-family: var(--font-hand-body);
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.5;
    border-left: 2px dashed var(--border-light);
    padding: 0.4rem 0 0.4rem 1rem;
    margin-top: 1.5rem;
}

.landing-note .hangul {
    font-family: var(--font-sans);
    font-weight: 700;
    color: var(--primary);
    font-size: 1.1rem;
}

.landing-note a,
.landing-hero a:not(.btn) {
    color: var(--primary);
    text-decoration: none;
    border-bottom: 1.5px dotted var(--primary);
    transition: all var(--transition-fast);
}
.landing-note a:hover,
.landing-hero a:not(.btn):hover {
    color: var(--primary-hover);
    border-bottom-style: solid;
}

/* -----------------------------------------------------------------------------
   Sticky-note grid
   --------------------------------------------------------------------------- */
.sticky-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin: 2.5rem 0 3rem;
}

.sticky {
    position: relative;
    padding: 1.6rem 1.3rem 1.4rem;
    background: var(--bg-elevated);
    border: 1.5px solid var(--border-light);
    border-radius: var(--blob-1);
    box-shadow: 4px 5px 0 rgba(192, 133, 82, 0.15);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-radius 0.4s ease;
}
.sticky:hover {
    transform: translateY(-4px) rotate(0deg) !important;
    box-shadow: 6px 8px 0 rgba(192, 133, 82, 0.22);
    border-radius: var(--blob-2);
}
.sticky-1 { transform: rotate(-2deg); }
.sticky-2 { transform: rotate(1.4deg); }
.sticky-3 { transform: rotate(-1deg); }

.sticky h3 {
    font-family: var(--font-hand);
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--text);
    margin: 0 0 0.4rem;
    letter-spacing: -0.01em;
}
.sticky h3::before {
    content: "";
    display: inline-block;
    width: 10px;
    height: 10px;
    margin-right: 0.45rem;
    border-radius: 60% 40% 55% 45% / 45% 55% 45% 55%;
    background: var(--primary);
    transform: translateY(-2px);
}
.sticky p {
    font-family: var(--font-hand-body);
    font-size: 1.15rem;
    line-height: 1.5;
    color: var(--text-secondary);
    margin: 0;
}
.sticky p code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    color: var(--primary-light);
    background: var(--bg);
    padding: 0.05em 0.35em;
    border-radius: 3px;
}
.sticky p em {
    color: var(--primary);
    font-style: normal;
    font-weight: 700;
}

/* a piece of "tape" at the top of each sticky */
.sticky-tape {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%) rotate(-2deg);
    width: 60px;
    height: 18px;
    background: rgba(241, 232, 216, 0.18);
    border: 1px dashed rgba(241, 232, 216, 0.25);
    backdrop-filter: blur(2px);
    border-radius: 1px;
}
.sticky-1 .sticky-tape { transform: translateX(-50%) rotate(3deg); left: 40%; }
.sticky-2 .sticky-tape { transform: translateX(-50%) rotate(-4deg); }
.sticky-3 .sticky-tape { transform: translateX(-50%) rotate(2deg); left: 60%; }

/* -----------------------------------------------------------------------------
   Code snippet — sketchy frame, like it's drawn around a transcript
   --------------------------------------------------------------------------- */
.snippet-wrap {
    position: relative;
    margin: 2rem 0 2.5rem;
}

.snippet-label {
    position: absolute;
    top: -14px;
    left: 24px;
    font-family: var(--font-hand);
    font-size: 1.25rem;
    color: var(--primary);
    background: var(--bg);
    padding: 0 0.6rem;
    transform: rotate(-1.5deg);
    z-index: 1;
}

.landing-snippet {
    background: var(--bg-elevated);
    border: 2px solid var(--text);
    border-radius: var(--blob-3);
    padding: 1.4rem 1.4rem 1.2rem;
    font-family: var(--font-mono);
    font-size: 0.88rem;
    line-height: 1.85;
    color: var(--text);
    margin: 0;
    overflow-x: auto;
    box-shadow: 5px 5px 0 var(--primary-glow);
    position: relative;
}
.landing-snippet .comment { color: var(--text-muted); font-style: italic; }
.landing-snippet .prompt {
    color: var(--primary);
    font-weight: 700;
    user-select: none;
    margin-right: 0.5rem;
}

/* -----------------------------------------------------------------------------
   Footer
   --------------------------------------------------------------------------- */
.landing-footer {
    max-width: 760px;
    margin: 4rem auto 2rem;
    padding: 1.5rem 2rem 0;
    border-top: 1.5px dashed var(--border-light);
    color: var(--text-muted);
    font-family: var(--font-hand-body);
    font-size: 1.1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.landing-footer a {
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px dotted var(--text-muted);
    transition: color var(--transition-fast);
}
.landing-footer a:hover {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* -----------------------------------------------------------------------------
   Responsive
   --------------------------------------------------------------------------- */
@media (max-width: 720px) {
    .sticky-grid {
        grid-template-columns: 1fr;
        gap: 1.8rem;
    }
    .sticky-1 { transform: rotate(-1.2deg); }
    .sticky-2 { transform: rotate(0.8deg); }
    .sticky-3 { transform: rotate(-0.6deg); }
}

@media (max-width: 600px) {
    .landing-header,
    .landing-main,
    .landing-footer {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }
    .hero-title { font-size: 2.4rem; }
    .hero-tagline { font-size: 1.3rem; }
    .btn { font-size: 1.2rem; padding: 0.6rem 1.1rem; }
    .hero-aside { font-size: 1.1rem; }
    .hero-aside .aside-arrow { width: 48px; height: 36px; }
}