/* ---------- Buttons ---------- */
.btn {
    --btn-bg: transparent;
    --btn-fg: var(--c-text);
    --btn-bd: var(--c-line-strong);
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--s-2);
    min-height: 48px;
    padding: 0.8rem 1.4rem;
    border-radius: var(--r-pill);
    border: 1px solid var(--btn-bd);
    background: var(--btn-bg);
    color: var(--btn-fg);
    font-weight: 600;
    font-size: var(--fs-sm);
    line-height: 1;
    white-space: nowrap;
    overflow: hidden;
    isolation: isolate;
    transition: color var(--t-med) var(--ease-out), border-color var(--t-med), box-shadow var(--t-med), transform var(--t-med) var(--ease-out);
}

    .btn::before {
        content: "";
        position: absolute;
        inset: 0;
        z-index: -1;
        border-radius: inherit;
        background: var(--c-text);
        transform: translateY(101%);
        transition: transform var(--t-med) var(--ease-out);
    }

    .btn i {
        transition: transform var(--t-med) var(--ease-out);
    }

    .btn:hover::before {
        transform: none;
    }

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

        .btn:hover i {
            transform: translateX(3px);
        }

.btn--primary {
    --btn-bg: var(--c-accent);
    --btn-fg: var(--c-on-accent);
    --btn-bd: var(--c-accent);
    box-shadow: 0 10px 30px -10px var(--c-accent-glow);
}

.btn--sm {
    min-height: 42px;
    padding: 0.65rem 1.1rem;
}

.btn--lg {
    min-height: 56px;
    padding: 1rem 1.75rem;
    font-size: var(--fs-base);
}

.btn[disabled] {
    opacity: 0.7;
    pointer-events: none;
}

.btn .spinner {
    display: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid currentColor;
    border-right-color: transparent;
    animation: spin 0.7s linear infinite;
}

.btn.is-loading .spinner {
    display: inline-block;
}

.btn.is-loading i {
    display: none;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.icon-btn {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--c-line-strong);
    background: rgba(11, 10, 10, 0.35);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    color: var(--c-text);
    transition: background-color var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}

    .icon-btn:hover {
        background: var(--c-accent);
        border-color: var(--c-accent);
        color: var(--c-on-accent);
    }

/* ---------- Text helpers ---------- */
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--c-accent);
}

    .eyebrow::before {
        content: "";
        width: 22px;
        height: 1px;
        background: currentColor;
    }

.text-gradient {
    background: linear-gradient(100deg, var(--c-accent) 10%, var(--c-accent-hi) 60%, #ffd2a6);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    font-weight: 600;
    font-size: var(--fs-sm);
    color: var(--c-text);
}

    .link-arrow i {
        display: grid;
        place-items: center;
        width: 30px;
        height: 30px;
        border-radius: 50%;
        border: 1px solid var(--c-line-strong);
        font-size: 0.75em;
        transition: transform var(--t-med) var(--ease-out), background-color var(--t-fast), color var(--t-fast), border-color var(--t-fast);
    }

    .link-arrow:hover i,
    a:hover > .link-arrow i,
    .project-card:hover .link-arrow i,
    .post-row:hover .link-arrow i {
        background: var(--c-accent);
        border-color: var(--c-accent);
        color: var(--c-on-accent);
        transform: rotate(-45deg);
    }

/* ---------- Section ---------- */
.section {
    padding-block: var(--s-section) 0;
}

.section-head {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--s-5);
    margin-bottom: clamp(2rem, 1.5rem + 2vw, 3.5rem);
}

.section-head__title {
    margin-top: var(--s-3);
    font-size: var(--fs-2xl);
    font-weight: 800;
    letter-spacing: -0.035em;
}

.section-head__lead {
    max-width: 52ch;
    margin-top: var(--s-3);
    color: var(--c-text-muted);
}

/* ---------- Spotlight surface ---------- */
.surface {
    position: relative;
    border: 1px solid var(--c-line);
    border-radius: var(--r-lg);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.01)), var(--c-surface);
    box-shadow: var(--shadow-1);
    isolation: isolate;
}

    .surface::before {
        content: "";
        position: absolute;
        inset: -1px;
        z-index: -1;
        border-radius: inherit;
        padding: 1px;
        background: radial-gradient(420px circle at var(--mx, 50%) var(--my, -50%), rgba(255, 127, 0, 0.55), transparent 45%);
        -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
        -webkit-mask-composite: xor;
        mask: linear-gradient(#000 0 0) content-box exclude, linear-gradient(#000 0 0);
        opacity: 0;
        transition: opacity var(--t-med);
        pointer-events: none;
    }

    .surface::after {
        content: "";
        position: absolute;
        inset: 0;
        z-index: -1;
        border-radius: inherit;
        background: radial-gradient(520px circle at var(--mx, 50%) var(--my, -50%), rgba(255, 127, 0, 0.08), transparent 40%);
        opacity: 0;
        transition: opacity var(--t-med);
        pointer-events: none;
    }

    .surface:hover::before,
    .surface:hover::after {
        opacity: 1;
    }

/* ---------- Project card ---------- */
.project-grid {
    display: grid;
    gap: var(--s-5);
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr));
}

.project-card {
    display: flex;
    flex-direction: column;
    padding: var(--s-3);
    transform-style: preserve-3d;
    transition: transform var(--t-med) var(--ease-out), border-color var(--t-med);
    will-change: transform;
}

    .project-card:hover {
        border-color: var(--c-line-strong);
    }

.project-card__media {
    position: relative;
    aspect-ratio: 16 / 10;
    border-radius: calc(var(--r-lg) - var(--s-3));
    overflow: hidden;
    background:
        radial-gradient(circle at 30% 20%, rgba(255, 127, 0, 0.25), transparent 60%),
        var(--c-surface-2);
}

    .project-card__media img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transform: scale(1.02);
        transition: transform 1.2s var(--ease-out), filter var(--t-med);
        filter: saturate(0.85);
    }

    .project-card__media::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, transparent 50%, rgba(11, 10, 10, 0.55));
    }

.project-card:hover .project-card__media img {
    transform: scale(1.08);
    filter: saturate(1.05);
}

.project-card__fallback {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    font-family: var(--f-display);
    font-size: 4rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.12);
}

.project-card__index {
    position: absolute;
    top: var(--s-3);
    left: var(--s-3);
    z-index: 1;
    padding: 0.3rem 0.6rem;
    border-radius: var(--r-pill);
    background: rgba(11, 10, 10, 0.6);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    color: var(--c-text);
}

.project-card__body {
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: var(--s-3);
    padding: var(--s-5) var(--s-3) var(--s-3);
}

.project-card__title {
    font-size: var(--fs-xl);
    font-weight: 700;
}

.project-card__desc {
    color: var(--c-text-muted);
    font-size: var(--fs-sm);
}

    .project-card__desc p {
        margin: 0;
    }

    .project-card__desc strong {
        color: var(--c-text);
    }

.project-card__foot {
    margin-top: auto;
    padding-top: var(--s-3);
}

.stretched::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 2;
}

/* ---------- Post row ---------- */
.post-list {
    border-top: 1px solid var(--c-line);
}

.post-row {
    position: relative;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--s-5);
    padding: var(--s-6) var(--s-2);
    border-bottom: 1px solid var(--c-line);
    isolation: isolate;
}

    .post-row::before {
        content: "";
        position: absolute;
        inset: 0;
        z-index: -1;
        background: linear-gradient(90deg, var(--c-accent-soft), transparent 70%);
        transform: scaleX(0);
        transform-origin: left;
        transition: transform 600ms var(--ease-out);
    }

    .post-row:hover::before {
        transform: none;
    }

.post-row__index {
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    color: var(--c-text-faint);
    min-width: 3ch;
}

.post-row__title {
    font-size: var(--fs-xl);
    font-weight: 700;
    transition: transform var(--t-med) var(--ease-out), color var(--t-fast);
}

.post-row:hover .post-row__title {
    color: var(--c-accent);
    transform: translateX(6px);
}

.post-row__desc {
    margin-top: var(--s-2);
    color: var(--c-text-muted);
    font-size: var(--fs-sm);
    max-width: 70ch;
}

    .post-row__desc p {
        margin: 0;
    }

@media (max-width: 575.98px) {
    .post-row {
        grid-template-columns: 1fr auto;
        gap: var(--s-4);
    }

    .post-row__index {
        display: none;
    }
}

/* ---------- Forms ---------- */
.field {
    position: relative;
}

    .field input,
    .field textarea {
        width: 100%;
        padding: 1.5rem 1rem 0.6rem;
        border-radius: var(--r-md);
        border: 1px solid var(--c-line-strong);
        background: rgba(255, 255, 255, 0.025);
        color: var(--c-text);
        font-size: var(--fs-base);
        transition: border-color var(--t-fast), background-color var(--t-fast), box-shadow var(--t-fast);
        resize: vertical;
    }

    .field textarea {
        min-height: 160px;
    }

    .field label {
        position: absolute;
        left: 1rem;
        top: 1.05rem;
        color: var(--c-text-faint);
        pointer-events: none;
        transform-origin: left top;
        transition: transform var(--t-med) var(--ease-out), color var(--t-fast);
    }

    .field input:focus,
    .field textarea:focus {
        outline: none;
        border-color: var(--c-accent);
        background: rgba(255, 127, 0, 0.04);
        box-shadow: 0 0 0 4px var(--c-accent-soft);
    }

    .field input:focus + label,
    .field input:not(:placeholder-shown) + label,
    .field textarea:focus + label,
    .field textarea:not(:placeholder-shown) + label {
        transform: translateY(-0.6rem) scale(0.78);
        color: var(--c-accent);
    }

    .field.is-invalid input,
    .field.is-invalid textarea {
        border-color: var(--c-danger);
    }

.field__error {
    display: none;
    margin-top: var(--s-1);
    font-size: var(--fs-xs);
    color: var(--c-danger);
}

.field.is-invalid .field__error {
    display: block;
}

.notice {
    display: flex;
    align-items: flex-start;
    gap: var(--s-3);
    padding: var(--s-4) var(--s-5);
    border-radius: var(--r-md);
    border: 1px solid;
    font-size: var(--fs-sm);
}

.notice--success {
    color: var(--c-success);
    border-color: rgba(61, 220, 151, 0.3);
    background: rgba(61, 220, 151, 0.08);
}

.notice--danger {
    color: var(--c-danger);
    border-color: rgba(255, 93, 93, 0.3);
    background: rgba(255, 93, 93, 0.08);
}

.empty-state {
    padding: var(--s-7) var(--s-5);
    text-align: center;
    color: var(--c-text-muted);
    border: 1px dashed var(--c-line-strong);
    border-radius: var(--r-lg);
}

    .empty-state i {
        font-size: 1.75rem;
        color: var(--c-accent);
        margin-bottom: var(--s-3);
    }