/* =========================================================================
   Design tokens
   Arah desain: "buku catatan insinyur" — kertas biru cetak biru (blueprint)
   bertemu editor kode. Label section ditulis seperti komentar kode (//),
   tanggal & tag pakai mono, timeline pengalaman punya garis "circuit trace".
   ========================================================================= */
:root {
    --ink: #10263a;           /* navy blueprint gelap, dipakai untuk hero & teks utama */
    --ink-soft: #1c3a52;
    --teal: #2e86ab;          /* garis biru cetak / link */
    --teal-soft: #e4eef3;
    --amber: #f2a93b;         /* aksen anotasi, satu-satunya warna hangat di palet */
    --amber-dark: #d88a1c;
    --paper: #f5f7fa;         /* latar halaman, putih kebiruan — bukan krem */
    --surface: #ffffff;
    --border: #dde4ea;
    --text: #1c2b36;
    --text-muted: #5b6b76;
    --text-on-ink: #eef4f8;
    --error: #d64545;
    --success: #2f9e63;

    --radius-sm: 6px;
    --radius: 12px;
    --shadow-sm: 0 1px 3px rgba(16, 38, 58, 0.08);
    --shadow-md: 0 8px 24px rgba(16, 38, 58, 0.10);
    --shadow-lg: 0 20px 48px rgba(16, 38, 58, 0.16);

    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    line-height: 1.65;
    color: var(--text);
    background-color: var(--paper);
}

.container {
    max-width: 1040px;
    margin: 0 auto;
    padding: 0 24px;
}

/* -------------------------------------------------------------------------
   Eyebrow / comment-style section labels — the recurring signature motif
   ------------------------------------------------------------------------- */
.eyebrow {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.03em;
    color: var(--teal);
    margin-bottom: 6px;
    opacity: 0.9;
}

/* -------------------------------------------------------------------------
   Hero
   ------------------------------------------------------------------------- */
#hero {
    position: relative;
    background: var(--ink);
    color: var(--text-on-ink);
    padding: 64px 0 44px;
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
    background-size: 36px 36px;
    -webkit-mask-image: radial-gradient(ellipse 90% 100% at 50% 0%, black 40%, transparent 90%);
            mask-image: radial-gradient(ellipse 90% 100% at 50% 0%, black 40%, transparent 90%);
    pointer-events: none;
}

.hero-inner {
    position: relative;
    z-index: 1;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 22px;
}

.hero-identity {
    display: flex;
    align-items: center;
    gap: 20px;
}

.avatar {
    flex-shrink: 0;
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: linear-gradient(150deg, var(--teal), var(--amber));
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--ink);
    box-shadow: 0 0 0 3px rgba(238,244,248,0.15), var(--shadow-md);
    animation: pop-in 0.6s ease both;
    position: relative;
    overflow: hidden;
}

.avatar-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.avatar-initials {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

#hero h1 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 2.3rem;
    letter-spacing: -0.01em;
    animation: fade-up 0.6s ease 0.05s both;
}

.subtitle {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: #b9d4e2;
    margin-top: 6px;
    animation: fade-up 0.6s ease 0.15s both;
}

.subtitle .prompt {
    color: var(--amber);
    font-weight: 600;
    margin-right: 6px;
}

.cursor {
    display: inline-block;
    width: 8px;
    height: 1em;
    margin-left: 4px;
    background: var(--amber);
    vertical-align: text-bottom;
    animation: blink 1.1s step-end infinite;
}

.header-actions {
    display: flex;
    gap: 10px;
    animation: fade-up 0.6s ease 0.2s both;
}

.contact-links {
    display: flex;
    justify-content: flex-start;
    gap: 10px;
    flex-wrap: wrap;
    animation: fade-up 0.6s ease 0.25s both;
}

.contact-links a {
    color: var(--text-on-ink);
    text-decoration: none;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 7px 14px;
    border-radius: 999px;
    border: 1px solid rgba(238,244,248,0.22);
    background: rgba(238,244,248,0.06);
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.contact-links a:hover {
    background: rgba(242,169,59,0.16);
    border-color: var(--amber);
    transform: translateY(-1px);
}

@keyframes fade-up {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes pop-in {
    from { opacity: 0; transform: scale(0.85); }
    to   { opacity: 1; transform: scale(1); }
}
@keyframes blink {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
}

/* -------------------------------------------------------------------------
   Nav
   ------------------------------------------------------------------------- */
#site-nav {
    background: rgba(245, 247, 250, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-inner ul {
    display: flex;
    justify-content: center;
    list-style: none;
    padding: 14px 0;
    gap: 8px;
    flex-wrap: wrap;
}

.nav-inner ul li a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 8px 14px;
    border-radius: 999px;
    transition: color 0.2s ease, background 0.2s ease;
}

.nav-inner ul li a:hover {
    color: var(--ink);
    background: var(--teal-soft);
}

.nav-inner ul li a.active {
    color: var(--ink);
    background: var(--teal-soft);
}

/* -------------------------------------------------------------------------
   Sections + scroll-reveal
   ------------------------------------------------------------------------- */
section {
    padding: 56px 0;
    border-bottom: 1px solid var(--border);
    scroll-margin-top: 70px;
}

section:last-of-type {
    border-bottom: none;
}

h2 {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--ink);
    font-size: 1.7rem;
    margin-bottom: 22px;
}

.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.in-view {
    opacity: 1;
    transform: translateY(0);
}

.summary-text {
    max-width: 68ch;
    color: var(--text);
    font-size: 1.02rem;
}

/* -------------------------------------------------------------------------
   Timeline (Experience & Education)
   ------------------------------------------------------------------------- */
.timeline {
    position: relative;
    padding-left: 28px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 6px;
    bottom: 6px;
    width: 2px;
    background: repeating-linear-gradient(
        to bottom,
        var(--teal) 0, var(--teal) 6px, transparent 6px, transparent 11px
    );
}

.experience-item, .education-item {
    position: relative;
    margin-bottom: 30px;
    padding-bottom: 2px;
}

.experience-item:last-child, .education-item:last-child {
    margin-bottom: 0;
}

.experience-item::before, .education-item::before {
    content: '';
    position: absolute;
    left: -28px;
    top: 6px;
    width: 11px;
    height: 11px;
    background: var(--surface);
    border: 2px solid var(--amber);
    border-radius: 3px;
}

.item-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 4px;
}

.item-header h3 {
    font-family: var(--font-display);
    font-size: 1.12rem;
    color: var(--ink);
    font-weight: 600;
}

.item-header span {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--teal);
    white-space: nowrap;
}

.item-meta {
    font-size: 0.92rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.item-description {
    list-style: none;
    margin-left: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.item-description li {
    position: relative;
    padding-left: 18px;
    font-size: 0.95rem;
}

.item-description li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--amber-dark);
    font-weight: 700;
}

/* -------------------------------------------------------------------------
   Skills
   ------------------------------------------------------------------------- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 22px;
}

.skill-category {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.skill-category:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.skill-category h4 {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    margin-bottom: 12px;
    color: var(--text-muted);
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tag {
    background: var(--teal-soft);
    color: var(--ink-soft);
    padding: 5px 12px;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 500;
    border: 1px solid transparent;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.skill-tag:hover {
    border-color: var(--amber);
    transform: translateY(-1px);
}

/* -------------------------------------------------------------------------
   Projects
   ------------------------------------------------------------------------- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 22px;
}

.project-card {
    background: var(--surface);
    padding: 22px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    border-top: 3px solid var(--teal);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.project-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.project-card h3 {
    font-family: var(--font-display);
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--ink);
}

.project-tech {
    font-family: var(--font-mono);
    font-size: 0.76rem;
    color: var(--amber-dark);
    margin-bottom: 10px;
}

.project-card p {
    font-size: 0.92rem;
    color: var(--text);
    margin-bottom: 12px;
}

.project-card a {
    color: var(--teal);
    font-weight: 600;
    font-size: 0.88rem;
    text-decoration: none;
}

.project-card a:hover {
    text-decoration: underline;
}

/* -------------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------------- */
footer {
    text-align: center;
    padding: 34px 0 44px;
    color: var(--text-muted);
    font-size: 0.88rem;
}

/* Kontak sensitif (email/telepon): tampil disamarkan sampai diklik */
.contact-links a.contact-reveal[data-revealed="false"] {
    font-style: italic;
    opacity: 0.85;
}

/* Back to top */
.back-to-top {
    position: fixed;
    right: 22px;
    bottom: 22px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: var(--ink);
    color: var(--text-on-ink);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 500;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.25s ease, transform 0.25s ease, background 0.2s ease;
}

.back-to-top:not(.hidden) {
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--teal);
}

/* -------------------------------------------------------------------------
   Buttons
   ------------------------------------------------------------------------- */
.btn {
    padding: 10px 16px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.88rem;
    font-family: var(--font-body);
    transition: background 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background: var(--ink);
    color: var(--text-on-ink);
}

.btn-primary:hover {
    background: var(--ink-soft);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-secondary {
    background: var(--teal-soft);
    color: var(--ink-soft);
}

.btn-secondary:hover {
    background: #d3e5ec;
}

.btn-ghost {
    background: rgba(238,244,248,0.08);
    color: var(--text-on-ink);
    border: 1px solid rgba(238,244,248,0.25);
}

.btn-ghost:hover {
    background: rgba(242,169,59,0.18);
    border-color: var(--amber);
}

.btn-logout {
    border-color: rgba(214,69,69,0.5);
}

.btn-logout:hover {
    background: rgba(214,69,69,0.25);
    border-color: var(--error);
}

.btn-delete {
    background: var(--error);
    color: #fff;
    padding: 6px 12px;
    font-size: 0.78rem;
    border-radius: var(--radius-sm);
}

.btn-delete:hover {
    background: #b93a3a;
}

.btn-edit {
    background: var(--teal);
    color: #fff;
    padding: 6px 12px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 600;
}

.btn-edit:hover {
    background: #256e8a;
}

.error-msg {
    color: var(--error);
    margin-top: 14px;
    font-size: 0.88rem;
}

.success-msg {
    color: var(--success);
    margin-top: 14px;
    font-size: 0.88rem;
}

.hidden {
    /* !important WAJIB: mencegah aturan display lain (mis. .modal { display:flex })
       menimpa .hidden karena spesifisitas CSS yang sama. */
    display: none !important;
}

/* -------------------------------------------------------------------------
   Modals
   ------------------------------------------------------------------------- */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(16, 38, 58, 0.55);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    overflow-y: auto;
    padding: 20px;
}

.modal-content {
    background: var(--surface);
    border-radius: var(--radius);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    margin: auto;
    box-shadow: var(--shadow-lg);
    animation: modal-in 0.22s ease both;
}

@keyframes modal-in {
    from { opacity: 0; transform: scale(0.97) translateY(6px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 22px;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--surface);
    border-radius: var(--radius) var(--radius) 0 0;
}

.modal-header h2 {
    border: none;
    padding: 0;
    margin: 0;
    font-size: 1.15rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-header h2 i {
    color: var(--teal);
    font-size: 1rem;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.8rem;
    line-height: 1;
    cursor: pointer;
    color: var(--text-muted);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: background 0.2s ease, color 0.2s ease;
}

.close-btn:hover {
    color: var(--text);
    background: var(--teal-soft);
}

.modal-body {
    padding: 22px;
}

.modal-hint {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.login-modal-content {
    max-width: 400px;
}

.login-modal-content .form-group {
    text-align: left;
}

/* Admin Tabs */
.admin-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 22px;
    padding: 5px;
    background: var(--paper);
    border-radius: 999px;
    overflow-x: auto;
}

.admin-tab-btn {
    padding: 9px 16px;
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-radius: 999px;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.admin-tab-btn.active {
    color: var(--surface);
    background: var(--ink);
}

.admin-tab-btn:hover:not(.active) {
    color: var(--ink);
    background: var(--teal-soft);
}

.admin-tab-content {
    display: none;
}

.admin-tab-content.active {
    display: block;
    animation: fade-up 0.25s ease both;
}

/* Forms */
.admin-form {
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 0.86rem;
    color: var(--ink-soft);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
    font-family: inherit;
    background: var(--paper);
    color: var(--text);
}

.form-group textarea {
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--teal);
    box-shadow: 0 0 0 3px rgba(46, 134, 171, 0.15);
    background: var(--surface);
}

/* Item Cards in Admin */
.admin-item-card {
    background: var(--paper);
    padding: 16px 18px;
    margin-bottom: 14px;
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--teal);
}

.admin-item-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.admin-item-card-header h4 {
    margin: 0;
    color: var(--ink);
    font-size: 0.98rem;
}

.admin-item-actions {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
}

.admin-item-form {
    display: none;
    background: var(--surface);
    padding: 16px;
    border-radius: var(--radius-sm);
    margin-top: 12px;
    border: 1px solid var(--border);
}

.admin-item-form.show {
    display: block;
    animation: fade-up 0.2s ease both;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-row.full {
    grid-template-columns: 1fr;
}

/* -------------------------------------------------------------------------
   Responsive
   ------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .header-top {
        flex-direction: column;
        gap: 16px;
    }

    #hero h1 {
        font-size: 1.7rem;
    }

    .avatar {
        width: 56px;
        height: 56px;
        font-size: 1.05rem;
    }

    .nav-inner ul {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
    }

    .modal-content {
        width: 100%;
        max-height: 95vh;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .back-to-top {
        right: 16px;
        bottom: 16px;
    }
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}