:root {
    /* ---- Brand palette ---- */
    --primary-blue: #2183B8;
    --dark-teal:    #0F4C5F;
    --deep-teal:    #0A3A48;
    --hero-teal:    #0B3742;
    --cream:        #FEF9F0;
    --white:        #FFFFFF;

    /* ---- Light mode (default) ---- */
    --bg:           var(--cream);
    --bg-alt:       var(--white);
    --text:         var(--deep-teal);
    --text-soft:    #4A6670;
    --card-bg:      var(--white);
    --border-color: rgba(10, 58, 72, 0.12);
    --accent:       var(--primary-blue);
    --accent-hover: var(--dark-teal);
    --header-bg:    var(--white);

    /* ---- Layout ---- */
    --radius:       14px;
    --radius-sm:    8px;
    --shadow:       0 10px 30px rgba(10, 58, 72, 0.08);
    --shadow-lg:    0 20px 45px rgba(10, 58, 72, 0.14);
    --transition:   all 0.25s ease;
    --font-display: 'Sora', 'Inter', sans-serif;
    --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Dark mode */
body.dark-mode {
    --bg:           var(--hero-teal);
    --bg-alt:       var(--deep-teal);
    --text:         var(--cream);
    --text-soft:    #B9CDD2;
    --card-bg:      var(--dark-teal);
    --border-color: rgba(254, 249, 240, 0.1);
    --accent:       #4FA8DC;
    --accent-hover: var(--cream);
    --header-bg:    var(--deep-teal);
    --shadow:       0 10px 30px rgba(0, 0, 0, 0.35);
    --shadow-lg:    0 20px 45px rgba(0, 0, 0, 0.4);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.65;
    transition: background-color 0.3s ease, color 0.3s ease;
    position: relative;
    overflow-x: hidden;
}

.skip-link {
    position: absolute;
    left: -999px;
    top: 0;
    background: var(--accent);
    color: var(--white);
    padding: 10px 16px;
    z-index: 2000;
    border-radius: 0 0 8px 0;
}

.skip-link:focus {
    left: 0;
}

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

a {
    color: inherit;
}

/* ===== Container ===== */

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* ===== Header ===== */

header {
    background: var(--header-bg);
    padding: 14px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex: 0 0 auto;
}

.logo img {
    width: 42px;
    height: 42px;
}

.logo-text {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--text);
    letter-spacing: -0.01em;
}

/* ===== Navigation ===== */

#main-nav ul {
    display: flex;
    list-style: none;
    gap: 28px;
}

#main-nav a {
    color: var(--text);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    transition: var(--transition);
    padding: 6px 0;
    position: relative;
}

#main-nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.25s ease;
}

#main-nav a:hover::after,
#main-nav li.current a::after {
    width: 100%;
}

#main-nav a:hover,
#main-nav li.current a {
    color: var(--accent);
}

/* ===== Theme Button ===== */

.theme-btn {
    background: var(--accent);
    color: var(--white);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    margin-left: 18px;
}

.theme-btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

/* ===== Mobile Menu ===== */

.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text);
    font-size: 1.7rem;
    cursor: pointer;
    margin-left: 10px;
}

.mobile-menu-btn:hover {
    color: var(--accent);
}

/* ===== Sections ===== */

main {
    position: relative;
    z-index: 1;
}

section {
    padding: 90px 0;
    position: relative;
}

h1,
h2,
h3 {
    font-family: var(--font-display);
    margin-bottom: 22px;
    color: var(--text);
    font-weight: 700;
    letter-spacing: -0.01em;
}

h1 {
    font-size: clamp(2.1rem, 4vw, 3rem);
}

h2 {
    font-size: clamp(1.4rem, 2.5vw, 1.8rem);
}

p {
    color: var(--text-soft);
    font-weight: 400;
}

/* ===== Eyebrow ===== */

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-display);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 14px;
}

.eyebrow::before {
    content: '';
    width: 22px;
    height: 2px;
    background: var(--accent);
    display: inline-block;
}

/* ===== Hero ===== */

#hero {
    min-height: 88vh;
    display: flex;
    align-items: center;
    padding-top: 110px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 50px;
    align-items: center;
}

#hero .greeting {
    font-family: var(--font-body);
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 10px;
    font-size: 1rem;
}

#hero h2.role {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    color: var(--text-soft);
    font-family: var(--font-body);
    font-weight: 500;
    margin-bottom: 18px;
}

#hero .hero-lede {
    max-width: 46ch;
    margin-bottom: 34px;
    font-size: 1.05rem;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* ===== Layer Stack ===== */

.layer-stack {
    position: relative;
    width: 100%;
    max-width: 360px;
    margin: 0 auto;
    aspect-ratio: 1 / 1;
}

.layer-stack .layer {
    position: absolute;
    inset: 0;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}

.layer-stack .layer-back {
    background: var(--dark-teal);
    transform: rotate(-6deg) translate(-12px, 10px);
}

.layer-stack .layer-mid {
    background: var(--accent);
    transform: rotate(4deg) translate(10px, -8px);
    opacity: 0.9;
}

.layer-stack .layer-front {
    overflow: hidden;
    display: flex;
    align-items: flex-end;
}

.layer-stack .layer-front img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.layer-tag {
    position: absolute;
    bottom: -14px;
    right: -14px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 10px 16px;
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 8px;
}

.layer-tag .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
}

/* ===== Quick Links / Capability Cards ===== */

#quick-links article {
    background-color: var(--card-bg);
    padding: 34px 28px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

#quick-links article:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

#quick-links .icon-badge {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: var(--accent);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 20px;
}

/* ===== About Page ===== */

.two-column {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 26px;
    margin-bottom: 46px;
}

#about article {
    background-color: var(--card-bg);
    padding: 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

#about article:hover {
    transform: translateY(-6px);
}

#about h2 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
}

#about h2 i {
    color: var(--accent);
}

#about ul,
#about ol {
    padding-left: 20px;
    color: var(--text-soft);
}

#about li {
    margin-bottom: 8px;
}

.skills {
    background-color: var(--card-bg);
    padding: 32px;
    border-radius: var(--radius);
    margin: 36px 0;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

/* ===== Table ===== */

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 18px;
}

th {
    background-color: var(--accent);
    color: var(--white);
    padding: 12px 14px;
    text-align: left;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.9rem;
}

th:first-child {
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

th:last-child {
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text);
}

/* ===== Map ===== */

.map-wrap {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.map-wrap iframe {
    display: block;
    width: 100%;
}

/* ===== Projects Page ===== */

.three-column {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 10px;
}

.project-card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.project-card .project-media {
    position: relative;
}

.project-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.project-year-badge {
    position: absolute;
    top: 14px;
    right: 14px;
    background: var(--deep-teal);
    color: var(--cream);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 999px;
}

.project-card .project-body {
    padding: 22px 22px 26px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.project-card h2 {
    font-size: 1.15rem;
    margin-bottom: 0;
}

.project-card p {
    font-size: 0.94rem;
    flex: 1;
}

.project-card .project-tech {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 600;
}

.project-card .btn {
    align-self: flex-start;
    margin-top: 10px;
}

/* ===== Contact Page ===== */

.contact-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 36px;
}

.contact-info,
.contact-form {
    background-color: var(--card-bg);
    padding: 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.contact-method {
    display: flex;
    align-items: center;
    margin-bottom: 18px;
    gap: 14px;
}

.contact-method i {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(33, 131, 184, 0.12);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.quick-contact-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 22px;
}

/* ===== Form ===== */

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(33, 131, 184, 0.18);
}

.form-group textarea {
    resize: vertical;
    min-height: 130px;
}

/* ===== Send Via ===== */

.send-via-group {
    display: flex;
    gap: 18px;
    margin-bottom: 22px;
    flex-wrap: wrap;
}

.send-via-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.88rem;
}

.send-via-option:has(input:checked) {
    border-color: var(--accent);
    background: rgba(33, 131, 184, 0.1);
    color: var(--accent);
    font-weight: 600;
}

.send-via-option input {
    width: auto;
}

.form-note {
    font-size: 0.82rem;
    color: var(--text-soft);
    margin-top: 6px;
}

/* ===== Alerts ===== */

.alert {
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.alert-error {
    background: rgba(190, 60, 60, 0.1);
    color: #b23b3b;
    border: 1px solid rgba(190, 60, 60, 0.25);
}

.dark-mode .alert-error {
    color: #ff8f8f;
}

/* ===== Redirect Spinner ===== */

.redirect-box {
    text-align: center;
    padding: 60px 20px;
}

.redirect-box .spinner {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent);
    margin: 0 auto 22px;
    animation: spin 0.9s linear infinite;
}

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

/* ===== Buttons ===== */

.btn {
    background-color: var(--accent);
    color: var(--white);
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.92rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    text-align: center;
}

.btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: transparent;
}

.btn-whatsapp {
    background-color: #25D366;
}

.btn-whatsapp:hover {
    background-color: #1DA851;
}

/* ===== Footer ===== */

footer {
    background-color: var(--hero-teal);
    color: var(--cream);
    padding: 46px 0 26px;
}

.footer-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 26px;
    border-bottom: 1px solid rgba(254, 249, 240, 0.12);
    margin-bottom: 20px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.footer-brand img {
    width: 40px;
    height: 40px;
}

.footer-name {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--cream);
}

.footer-role {
    font-size: 0.82rem;
    color: #B9CDD2;
}

.footer-contact p {
    color: #DCEBEF;
    font-size: 0.88rem;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-contact a {
    color: #DCEBEF;
    text-decoration: none;
}

.footer-contact a:hover {
    color: var(--primary-blue);
}

.social {
    display: flex;
    gap: 16px;
}

.social a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(254, 249, 240, 0.08);
    color: var(--cream);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--transition);
}

.social a:hover {
    background: var(--primary-blue);
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    font-size: 0.82rem;
    color: #9DB6BC;
}

/* ===== Floating WhatsApp Button ===== */

.whatsapp-float {
    position: fixed;
    bottom: 26px;
    right: 26px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #25D366;
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
    z-index: 900;
    transition: var(--transition);
    text-decoration: none;
}

.whatsapp-float:hover {
    transform: translateY(-4px) scale(1.05);
}

/* ===== Responsive ===== */

@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-cta {
        justify-content: center;
    }

    .layer-stack {
        max-width: 280px;
    }
}

@media (max-width: 768px) {

    #main-nav ul {
        display: none;
        flex-direction: column;
        width: 100%;
        background-color: var(--header-bg);
        position: absolute;
        top: 68px;
        left: 0;
        padding: 20px;
        box-shadow: var(--shadow);
        gap: 16px;
        text-align: center;
    }

    #main-nav.show ul {
        display: flex;
    }

    .logo-text {
        display: none;
    }

    .theme-btn {
        margin-left: auto;
    }

    .mobile-menu-btn {
        display: block;
    }

    #hero {
        padding-top: 130px;
        min-height: auto;
        padding-bottom: 60px;
    }

    section {
        padding: 60px 0;
    }
}