/* -- Projects Page Styles -- */
      .proj-hero {
        background: linear-gradient(135deg, #2e3070 0%, #454698 55%, #c8820d 180%);
        padding: 72px 0 62px;
        text-align: center;
        position: relative;
        overflow: hidden;
      }
      .proj-hero::before {
        content: '';
        position: absolute;
        top: -60px; left: -60px;
        width: 220px; height: 220px;
        border-radius: 50%;
        background: rgba(240, 154, 15, 0.15);
        animation: floatBubble 6s ease-in-out infinite;
      }
      .proj-hero::after {
        content: '';
        position: absolute;
        bottom: -40px; right: -40px;
        width: 160px; height: 160px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.08);
        animation: floatBubble 8s ease-in-out infinite reverse;
      }
      @keyframes floatBubble {
        0%, 100% { transform: translateY(0) scale(1); }
        50% { transform: translateY(-20px) scale(1.05); }
      }
      .proj-hero__badge {
        display: inline-block;
        background: rgba(240, 154, 15, 0.2);
        border: 1px solid rgba(240, 154, 15, 0.5);
        color: #f09a0f;
        font-size: 0.8rem;
        font-weight: 600;
        letter-spacing: 1.5px;
        text-transform: uppercase;
        padding: 6px 18px;
        border-radius: 50px;
        margin-bottom: 20px;
      }
      .proj-hero__title {
        font-size: clamp(2rem, 5vw, 3.2rem);
        font-weight: 800;
        color: #ffffff;
        margin-bottom: 16px;
        line-height: 1.2;
      }
      .proj-hero__title span {
        color: #f09a0f;
      }
      .proj-hero__subtitle {
        font-size: 1.05rem;
        color: rgba(255,255,255,0.85);
        max-width: 620px;
        margin: 0 auto 28px;
        line-height: 1.8;
      }
      .proj-hero__progression {
        color: rgba(255,255,255,0.72);
        font-size: 0.9rem;
        font-weight: 600;
        margin: -8px auto 24px;
      }
      .proj-hero__stats {
        display: flex;
        justify-content: center;
        gap: 40px;
        flex-wrap: wrap;
        margin-top: 10px;
      }
      .proj-hero__stat {
        text-align: center;
      }
      .proj-hero__stat-num {
        font-size: 2rem;
        font-weight: 800;
        color: #f09a0f;
        display: block;
      }
      .proj-hero__stat-label {
        font-size: 0.82rem;
        color: rgba(255,255,255,0.65);
        letter-spacing: 0.5px;
        text-transform: uppercase;
      }

      /* -- Filter Tabs -- */
      .proj-filters {
        padding: 36px 0 8px;
      }
      .proj-filters__wrap {
        display: flex;
        justify-content: center;
        gap: 10px;
        flex-wrap: wrap;
      }
      .proj-filter-btn {
        padding: 10px 24px;
        border-radius: 50px;
        font-size: 0.9rem;
        font-weight: 600;
        border: 2px solid transparent;
        cursor: pointer;
        transition: all 0.3s ease;
        background: transparent;
        color: var(--text-blue);
        border-color: #e0e0e0;
      }
      body.dark-theme .proj-filter-btn {
        color: #ccc;
        border-color: #444;
      }
      .proj-filter-btn.active,
      .proj-filter-btn:hover {
        background: var(--text-blue);
        color: #fff;
        border-color: var(--text-blue);
        transform: translateY(-2px);
        box-shadow: 0 4px 15px rgba(37, 38, 94, 0.3);
      }
      body.dark-theme .proj-filter-btn.active,
      body.dark-theme .proj-filter-btn:hover {
        background: #f09a0f;
        border-color: #f09a0f;
        box-shadow: 0 4px 15px rgba(240, 154, 15, 0.35);
      }
      .proj-filter-btn[data-filter="beginner"].active,
      .proj-filter-btn[data-filter="beginner"]:hover {
        background: #27ae60;
        border-color: #27ae60;
        box-shadow: 0 4px 15px rgba(39, 174, 96, 0.35);
      }
      .proj-filter-btn[data-filter="intermediate"].active,
      .proj-filter-btn[data-filter="intermediate"]:hover {
        background: #2980b9;
        border-color: #2980b9;
        box-shadow: 0 4px 15px rgba(41, 128, 185, 0.35);
      }
      .proj-filter-btn[data-filter="advanced"].active,
      .proj-filter-btn[data-filter="advanced"]:hover {
        background: #8e44ad;
        border-color: #8e44ad;
        box-shadow: 0 4px 15px rgba(142, 68, 173, 0.35);
      }

      /* -- Project Cards -- */
      .proj-section {
        padding: 64px 0 72px;
        background: #f7f8fc;
      }
      .proj-category-title {
        font-size: 1.4rem;
        font-weight: 700;
        color: var(--text-blue);
        margin: 40px 0 20px;
        display: flex;
        align-items: center;
        gap: 10px;
      }
      body.dark-theme .proj-category-title {
        color: #fff;
      }
      .proj-category-title::after {
        content: '';
        flex: 1;
        height: 2px;
        background: linear-gradient(to right, currentColor, transparent);
        opacity: 0.2;
      }
      .proj-category-description {
        color: #666;
        font-size: 0.95rem;
        line-height: 1.6;
        margin: -8px 0 20px;
        max-width: 760px;
      }
      body.dark-theme .proj-category-description { color: #aaa; }
      .proj-category-badge {
        display: inline-flex;
        align-items: center;
        gap: 5px;
        padding: 3px 12px;
        border-radius: 50px;
        font-size: 0.7rem;
        font-weight: 700;
        letter-spacing: 0.5px;
        text-transform: uppercase;
      }
      .badge-beginner { background: rgba(39, 174, 96, 0.12); color: #27ae60; }
      .badge-intermediate { background: rgba(41, 128, 185, 0.12); color: #2980b9; }
      .badge-advanced { background: rgba(142, 68, 173, 0.12); color: #8e44ad; }

      .proj-card {
        background: var(--white);
        border-radius: 16px;
        overflow: hidden;
        box-shadow: 0 2px 12px rgba(37, 38, 94, 0.08);
        transition: all 0.35s ease;
        display: flex;
        flex-direction: column;
        height: 100%;
        text-decoration: none;
        color: inherit;
        border: 1px solid rgba(37, 38, 94, 0.06);
        animation: fadeInUp 0.5s ease both;
      }
      body.dark-theme .proj-card {
        background: #1e1e38;
        border-color: rgba(255,255,255,0.08);
        box-shadow: 0 2px 12px rgba(0,0,0,0.3);
      }
      .proj-card:hover {
        transform: translateY(-8px);
        box-shadow: 0 16px 40px rgba(37, 38, 94, 0.15);
        text-decoration: none;
        color: inherit;
      }
      body.dark-theme .proj-card:hover {
        box-shadow: 0 16px 40px rgba(0,0,0,0.4);
      }
      .proj-card__header {
        padding: 28px 24px 20px;
        position: relative;
      }
      .proj-card__icon {
        width: 56px; height: 56px;
        border-radius: 14px;
        display: flex; align-items: center; justify-content: center;
        font-size: 1.5rem;
        margin-bottom: 14px;
      }
      .proj-card__title {
        font-size: 1.1rem;
        font-weight: 700;
        color: var(--text-blue);
        margin-bottom: 8px;
      }
      body.dark-theme .proj-card__title { color: #fff; }
      .proj-card__desc {
        font-size: 0.88rem;
        color: #666;
        line-height: 1.6;
        margin-bottom: 0;
      }
      body.dark-theme .proj-card__desc { color: #aaa; }
      .proj-card__footer {
        padding: 16px 24px;
        border-top: 1px solid rgba(37, 38, 94, 0.06);
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-top: auto;
      }
      body.dark-theme .proj-card__footer {
        border-color: rgba(255,255,255,0.06);
      }
      .proj-card__tags {
        display: flex;
        gap: 6px;
        flex-wrap: wrap;
      }
      .proj-card__tag {
        font-size: 0.7rem;
        font-weight: 600;
        padding: 3px 10px;
        border-radius: 50px;
        background: rgba(37, 38, 94, 0.06);
        color: var(--text-blue);
        letter-spacing: 0.3px;
      }
      body.dark-theme .proj-card__tag {
        background: rgba(255,255,255,0.08);
        color: #ccc;
      }
      .proj-card__arrow {
        width: 32px; height: 32px;
        border-radius: 50%;
        background: var(--text-blue);
        display: flex; align-items: center; justify-content: center;
        color: #fff;
        font-size: 0.75rem;
        transition: all 0.3s ease;
        flex-shrink: 0;
      }
      body.dark-theme .proj-card__arrow {
        background: #f09a0f;
      }
      .proj-card:hover .proj-card__arrow {
        background: #f09a0f;
        transform: translateX(4px);
      }

      /* color themes per category */
      .proj-card--beginner .proj-card__icon { background: rgba(39,174,96,0.12); color: #27ae60; }
      .proj-card--intermediate .proj-card__icon { background: rgba(41,128,185,0.12); color: #2980b9; }
      .proj-card--advanced .proj-card__icon { background: rgba(142,68,173,0.12); color: #8e44ad; }

      /* -- Animations -- */
      @keyframes fadeInUp {
        from { opacity: 0; transform: translateY(24px); }
        to { opacity: 1; transform: translateY(0); }
      }
      .proj-card:nth-child(1) { animation-delay: 0.05s; }
      .proj-card:nth-child(2) { animation-delay: 0.1s; }
      .proj-card:nth-child(3) { animation-delay: 0.15s; }
      .proj-card:nth-child(4) { animation-delay: 0.2s; }

      /* hide filtered cards */
      .proj-card-wrap.hidden {
        display: none !important;
      }

      /* -- CTA Banner -- */
      .proj-cta {
        background: linear-gradient(135deg, #25265e, #3a3b8e);
        border-radius: 20px;
        padding: 50px 40px;
        text-align: center;
        margin: 30px 0 0;
        position: relative;
        overflow: hidden;
      }
      .proj-cta::before {
        content: '</>';
        position: absolute;
        right: 30px; top: 20px;
        font-size: 5rem;
        font-weight: 900;
        color: rgba(255,255,255,0.04);
        font-family: monospace;
      }
      .proj-cta h2 {
        color: #fff;
        font-size: 1.8rem;
        font-weight: 700;
        margin-bottom: 12px;
      }
      .proj-cta p {
        color: rgba(255,255,255,0.75);
        margin-bottom: 24px;
        font-size: 1rem;
      }
      .proj-cta .btn-cta {
        display: inline-block;
        padding: 12px 32px;
        background: #f09a0f;
        color: #fff;
        border-radius: 50px;
        font-weight: 700;
        text-decoration: none;
        transition: all 0.3s;
        box-shadow: 0 4px 15px rgba(240,154,15,0.4);
      }
      .proj-cta .btn-cta:hover {
        background: #d4880d;
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(240,154,15,0.5);
      }
      body.dark-theme .proj-cta {
        background: linear-gradient(135deg, #2d2f85, #4c4eb8) !important;
        box-shadow: 0 4px 32px rgba(0,0,0,0.4);
      }

      /* -- Breadcrumb -- */
      .proj-breadcrumb {
        padding: 14px 0 0;
        font-size: 0.85rem;
        color: #888;
      }
      .proj-breadcrumb a { color: #f09a0f; text-decoration: none; }
      .proj-breadcrumb a:hover { text-decoration: underline; }
      .proj-breadcrumb span { color: #999; }