/* ============================================
   PROJECT LINK BUTTONS — Expand on Hover
   Strategy: max-width transition on <span>
   Desktop only; mobile keeps static layout
   ============================================ */

/* ── Container ── */
.project-links {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

/* ── Base button ── */
.project-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    /* gap opens only when text is visible */
    height: 38px;
    /* Khớp với social icons w-12 h-12 → cân đối hơn */
    padding: 0 0.75rem;
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    /* Transition: width via padding, colors, shadow */
    transition:
        padding 0.35s cubic-bezier(0.4, 0, 0.2, 1),
        gap 0.35s cubic-bezier(0.4, 0, 0.2, 1),
        background 0.3s ease,
        border-color 0.3s ease,
        color 0.3s ease,
        box-shadow 0.3s ease,
        transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    white-space: nowrap;
}

/* ── Icon — 20px = w-5 h-5, thống nhất với toàn bộ giao diện ── */
.project-link i {
    width: 1.25rem;
    /* 20px — khớp với w-5 h-5 */
    height: 1.25rem;
    flex-shrink: 0;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── Text label — hidden by default ── */
.project-link span {
    display: inline-block;
    max-width: 0;
    overflow: hidden;
    opacity: 0;
    /* Transition: expand width + fade in */
    transition:
        max-width 0.35s cubic-bezier(0.4, 0, 0.2, 1),
        opacity 0.25s ease,
        margin 0.35s ease;
    margin-left: 0;
}

/* ============================================
   SOURCE (GITHUB) — Glass Dark variant
   ============================================ */
.project-link.github {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: #d4d4d4;
}

/* Shine layer */
.project-link.github::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

/* ── Hover Source directly ── */
.project-link.github:hover {
    background: rgba(255, 255, 255, 0.13);
    border-color: rgba(255, 255, 255, 0.35);
    color: #ffffff;
    padding: 0 1.25rem;
    gap: 0.5rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    transform: translateY(-2px);
}

.project-link.github:hover::after {
    opacity: 1;
}

.project-link.github:hover i {
    transform: rotate(12deg) scale(1.1);
}

/* Expand text when Source is hovered */
.project-link.github:hover span {
    max-width: 80px;
    opacity: 1;
    margin-left: 0;
}

/* ============================================
   LIVE DEMO — Neon Lime variant
   ============================================ */
.project-link.demo {
    background: rgba(217, 255, 0, 0.08);
    border: 1px solid rgba(217, 255, 0, 0.35);
    color: #D9FF00;
}

/* Shine layer */
.project-link.demo::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(217, 255, 0, 0.15) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

/* ── Trigger: hover vào cả thẻ project card → expand Live Demo ── */
.project-card:hover .project-links .project-link.demo {
    background: #D9FF00;
    border-color: #D9FF00;
    color: #000000;
    padding: 0 1.25rem;
    gap: 0.5rem;
    box-shadow: 0 6px 24px rgba(217, 255, 0, 0.35);
    transform: translateY(-2px);
}

.project-card:hover .project-links .project-link.demo::after {
    opacity: 1;
}

.project-card:hover .project-links .project-link.demo i {
    transform: translate(2px, -2px) scale(1.1);
}

.project-card:hover .project-links .project-link.demo span {
    max-width: 90px;
    opacity: 1;
}

/* ── Khi hover Source: collapse Live Demo, expand Source ── */
.project-card:hover .project-links:has(.project-link.github:hover) .project-link.demo {
    background: rgba(217, 255, 0, 0.08);
    border-color: rgba(217, 255, 0, 0.35);
    color: #D9FF00;
    padding: 0 0.75rem;
    gap: 0;
    box-shadow: none;
    transform: none;
}

.project-card:hover .project-links:has(.project-link.github:hover) .project-link.demo::after {
    opacity: 0;
}

.project-card:hover .project-links:has(.project-link.github:hover) .project-link.demo i {
    transform: none;
}

.project-card:hover .project-links:has(.project-link.github:hover) .project-link.demo span {
    max-width: 0;
    opacity: 0;
}

/* ── Hover Live Demo directly ── */
.project-link.demo:hover {
    box-shadow: 0 8px 28px rgba(217, 255, 0, 0.45) !important;
    transform: translateY(-3px) !important;
}

/* ── Active / Pressed ── */
.project-link:active {
    transform: translateY(0) scale(0.97) !important;
    box-shadow: none !important;
    transition-duration: 0.1s;
}

/* ============================================
   MOBILE — Static layout (no expand animation)
   ============================================ */
@media (max-width: 768px) {
    .project-links {
        gap: 0.5rem;
    }

    /* Reset all expand logic on mobile */
    .project-link {
        padding: 0.4rem 0.75rem;
        gap: 0.35rem;
        height: auto;
        font-size: 0.8rem;
        transform: none !important;
    }

    /* Icon size — nhỏ hơn trên mobile */
    .project-link i {
        width: 1rem;
        height: 1rem;
    }

    .project-link span {
        max-width: 100px !important;
        opacity: 1 !important;
        margin-left: 0 !important;
    }

    .project-links:hover .project-link.demo,
    .project-card:hover .project-links .project-link.demo,
    .project-links:has(.project-link.github:hover) .project-link.demo,
    .project-card:hover .project-links:has(.project-link.github:hover) .project-link.demo {
        padding: 0.4rem 0.75rem;
        gap: 0.35rem;
        transform: none;
    }

    /* Demo always solid on mobile */
    .project-link.demo,
    .project-links:hover .project-link.demo {
        background: #D9FF00 !important;
        color: #000 !important;
        border-color: #D9FF00 !important;
    }
}

/* Icon-only circles on very small screens */
@media (max-width: 480px) {
    .project-links {
        gap: 0.5rem;
    }

    .project-link {
        width: 36px;
        height: 36px;
        padding: 0 !important;
        gap: 0 !important;
        border-radius: 50%;
        justify-content: center;
    }

    .project-link span {
        display: none !important;
    }

    .project-link i {
        width: 1rem;
        height: 1rem;
    }

    .project-link.github {
        background: rgba(255, 255, 255, 0.08);
        border-color: rgba(255, 255, 255, 0.15);
    }

    .project-link.demo {
        box-shadow: 0 4px 14px rgba(217, 255, 0, 0.3);
    }
}