/* ============================================================
   DIY PROJECTS — Main Stylesheet
   Brand colors taken from the PBL poster:
   Navy: #0e2a55 | Orange: #e8722c | Light blue accent: #2456a6
   ============================================================ */

:root {
    --navy: #0e2a55;
    --navy-dark: #081b3a;
    --orange: #e8722c;
    --blue: #2456a6;
    --green: #1b9e6b;
    --purple: #7a2cc7;
    --yellow: #f4c430;
    --gray-bg: #f4f7fb;
    --text-dark: #1b1f27;
    --text-muted: #5a6472;
    --white: #ffffff;
    --border: #e2e8f0;
    --radius: 10px;
    --shadow: 0 4px 14px rgba(14, 42, 85, 0.08);
    --shadow-hover: 0 10px 28px rgba(14, 42, 85, 0.16);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
    color: var(--text-dark);
    background: var(--gray-bg);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------- Header ---------- */
.site-header {
    background: #cfe3f7;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    max-width: 1180px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.4rem;
    color: var(--white);
}

.logo span.accent {
    color: var(--orange);
}

.logo small {
    display: block;
    font-size: 0.6rem;
    font-weight: 400;
    color: #b9c4d6;
    letter-spacing: 0.5px;
}

nav.main-nav {
    display: flex;
    gap: 28px;
}

nav.main-nav a {
    color: #0e2a55;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 8px 4px;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

nav.main-nav a:hover,
nav.main-nav a.active {
    color: #4d6a8c;
    border-bottom-color: var(--orange);
}

.nav-cta {
    background: var(--orange);
    color: var(--white) !important;
    padding: 9px 18px !important;
    border-radius: 6px;
    border-bottom: none !important;
}

.nav-cta:hover {
    background: #d4621f;
    border-bottom: none !important;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.6rem;
    cursor: pointer;
}

/* ---------- Hero / Page header banner ---------- */
.page-banner {
    background: linear-gradient(135deg, var(--navy) 0%, #163a6e 100%);
    color: var(--white);
    padding: 50px 20px;
    text-align: center;
}

.page-banner h1 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 10px;
}

.page-banner h1 .accent {
    color: var(--orange);
}

.page-banner p {
    color: #cdd9ec;
    max-width: 650px;
    margin: 0 auto;
    font-size: 1.05rem;
}

/* ---------- Category filter bar ---------- */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    padding: 28px 20px 8px;
    max-width: 1180px;
    margin: 0 auto;
}

.filter-btn {
    border: 2px solid var(--border);
    background: var(--white);
    padding: 8px 18px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.88rem;
    cursor: pointer;
    color: var(--text-muted);
    transition: all 0.2s ease;
}

.filter-btn:hover {
    border-color: var(--blue);
    color: var(--blue);
}

.filter-btn.active {
    background: var(--navy);
    border-color: var(--navy);
    color: var(--white);
}

/* ---------- Project grid & cards ---------- */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    padding: 30px 20px 60px;
    max-width: 1180px;
    margin: 0 auto;
}

.project-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.card-thumb {
    width: 100%;
    height: 170px;
    object-fit: cover;
    background: #dde6f2;
}

.card-body {
    padding: 18px 18px 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.badge {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--white);
    padding: 4px 11px;
    border-radius: 30px;
    margin-bottom: 10px;
    align-self: flex-start;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.card-body h3 {
    font-size: 1.12rem;
    margin-bottom: 8px;
    color: var(--navy);
    font-weight: 700;
}

.card-body p {
    font-size: 0.9rem;
    color: var(--text-muted);
    flex: 1;
    margin-bottom: 14px;
}

.card-meta {
    display: flex;
    gap: 14px;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.card-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.btn {
    display: inline-block;
    text-align: center;
    background: var(--navy);
    color: var(--white);
    padding: 10px 16px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.9rem;
    transition: background 0.2s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background: var(--blue);
}

.btn-orange {
    background: var(--orange);
}

.btn-orange:hover {
    background: #d4621f;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--navy);
    color: var(--navy);
}

.btn-outline:hover {
    background: var(--navy);
    color: var(--white);
}

.btn-block {
    width: 100%;
}

/* ---------- Project detail page ---------- */
.project-detail {
    max-width: 880px;
    margin: 0 auto;
    padding: 40px 20px 70px;
}

.project-detail .badge {
    margin-bottom: 14px;
}

.project-detail h1 {
    font-size: 2rem;
    color: var(--navy);
    margin-bottom: 14px;
    font-weight: 800;
}

.meta-row {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 26px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.meta-item {
    font-size: 0.88rem;
    color: var(--text-muted);
}

.meta-item strong {
    color: var(--text-dark);
    display: block;
    font-size: 0.95rem;
}

.video-wrap {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: var(--radius);
    margin-bottom: 30px;
    background: #000;
    box-shadow: var(--shadow);
}

.video-wrap iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.section-block {
    margin-bottom: 36px;
}

.section-block h2 {
    font-size: 1.35rem;
    color: var(--navy);
    margin-bottom: 14px;
    font-weight: 700;
    border-left: 4px solid var(--orange);
    padding-left: 12px;
}

.section-block p {
    color: var(--text-dark);
    font-size: 1rem;
}

.components-list, .steps-list {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 26px;
}

.components-list ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 10px;
}

.components-list li {
    font-size: 0.95rem;
    padding-left: 22px;
    position: relative;
}

.components-list li::before {
    content: "\2713";
    position: absolute;
    left: 0;
    color: var(--green);
    font-weight: 700;
}

.steps-list ol {
    padding-left: 18px;
}

.steps-list li {
    margin-bottom: 14px;
    font-size: 0.96rem;
}

.steps-list li:last-child {
    margin-bottom: 0;
}

pre.code-block {
    background: #1b2230;
    color: #e3eaf5;
    padding: 22px;
    border-radius: var(--radius);
    overflow-x: auto;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 0.86rem;
    line-height: 1.55;
    position: relative;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.code-header span {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
}

.copy-btn {
    background: var(--blue);
    color: var(--white);
    border: none;
    padding: 6px 14px;
    border-radius: 5px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
}

.copy-btn:hover {
    background: var(--navy);
}

.notes-box {
    background: #fff8e8;
    border: 1px solid #f0d98c;
    border-radius: var(--radius);
    padding: 18px 22px;
    font-size: 0.92rem;
    color: #6b5614;
}

.notes-box strong {
    color: #8a6d10;
}

.cert-cta {
    background: linear-gradient(135deg, var(--navy), #163a6e);
    color: var(--white);
    border-radius: var(--radius);
    padding: 30px;
    text-align: center;
    margin-top: 40px;
}

.cert-cta h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
}

.cert-cta p {
    color: #cdd9ec;
    margin-bottom: 18px;
}

/* ---------- Certificate form page ---------- */
.cert-page {
    max-width: 720px;
    margin: 0 auto;
    padding: 40px 20px 70px;
}

.cert-form-box {
    background: var(--white);
    border-radius: var(--radius);
    padding: 34px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.fee-banner {
    background: #fff8e8;
    border: 1px solid #f0d98c;
    border-radius: var(--radius);
    padding: 20px 24px;
    margin-bottom: 28px;
    text-align: center;
}

.fee-banner .price {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--navy);
}

.fee-banner p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 4px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 0.92rem;
    color: var(--text-dark);
}

.form-group label .optional {
    color: var(--text-muted);
    font-weight: 400;
    font-size: 0.82rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="url"],
.form-group select {
    width: 100%;
    padding: 11px 14px;
    border: 1.5px solid var(--border);
    border-radius: 6px;
    font-size: 0.95rem;
    font-family: inherit;
    transition: border 0.2s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--blue);
}

.file-upload {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 26px;
    text-align: center;
    cursor: pointer;
    transition: border 0.2s ease, background 0.2s ease;
    background: #fafcff;
}

.file-upload:hover {
    border-color: var(--blue);
    background: #f0f6ff;
}

.file-upload input[type="file"] {
    display: none;
}

.file-upload-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.file-upload-label strong {
    color: var(--blue);
}

#file-name-display {
    margin-top: 10px;
    font-size: 0.85rem;
    color: var(--green);
    font-weight: 600;
}

.form-msg {
    padding: 14px 18px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.92rem;
    display: none;
}

.form-msg.success {
    background: #e6f7ef;
    color: #0d7a4d;
    border: 1px solid #aee5cb;
    display: block;
}

.form-msg.error {
    background: #fdeaea;
    color: #b3261e;
    border: 1px solid #f3b9b6;
    display: block;
}

.steps-info {
    display: flex;
    gap: 16px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.step-info-card {
    flex: 1;
    min-width: 140px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    text-align: center;
}

.step-info-card .num {
    width: 32px;
    height: 32px;
    background: var(--navy);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 10px;
    font-weight: 700;
    font-size: 0.9rem;
}

.step-info-card p {
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* ---------- Footer ---------- */
.site-footer {
    background: var(--navy-dark);
    color: #aebbd2;
    padding: 50px 20px 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    max-width: 1180px;
    margin: 0 auto 30px;
}

.footer-col h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 14px;
}

.footer-col a {
    display: block;
    font-size: 0.88rem;
    margin-bottom: 9px;
    color: #aebbd2;
}

.footer-col a:hover {
    color: var(--orange);
}

.footer-bottom {
    text-align: center;
    font-size: 0.82rem;
    border-top: 1px solid #1b3760;
    padding-top: 20px;
    max-width: 1180px;
    margin: 0 auto;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    nav.main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: #cfe3f7;
        flex-direction: column;
        padding: 10px 20px 20px;
        gap: 4px;
        display: none;
    }

    nav.main-nav.open {
        display: flex;
    }

    .mobile-toggle {
        display: block;
    }

    .page-banner h1 {
        font-size: 1.6rem;
    }

    .components-list ul {
        grid-template-columns: 1fr;
    }

    .meta-row {
        gap: 14px;
    }
}