/* ===== Custom Properties ===== */
:root {
    /* Palette */
    --clr-bg:        #131819;
    --clr-bg-raised: #1a2124;
    --clr-bg-card:   rgba(255, 255, 255, 0.04);
    --clr-border:    rgba(255, 255, 255, 0.08);
    --clr-border-hi: rgba(255, 255, 255, 0.14);
    --clr-accent:    #00d4ff;
    --clr-accent-2:  #0099cc;
    --clr-accent-glow: rgba(0, 212, 255, 0.18);
    --clr-text:      #ffffff;
    --clr-text-muted:#94a3b0;
    --clr-text-dim:  #6b7b88;

    /* Typography scale */
    --step--1: clamp(0.85rem, 0.82rem + 0.2vw, 0.95rem);
    --step-0 : clamp(1.0rem, 0.95rem + 0.4vw, 1.125rem);
    --step-1 : clamp(1.25rem, 1.1rem + 1.2vw, 1.75rem);
    --step-2 : clamp(1.75rem, 1.5rem + 2.2vw, 2.5rem);
    --step-3 : clamp(2.25rem, 1.8rem + 3.5vw, 3.25rem);

    /* Spacing */
    --section-pad: clamp(72px, 8vw, 110px);

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-pill: 999px;

    /* Transitions */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --dur: 0.3s;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', sans-serif;
    font-size: var(--step-0);
    line-height: 1.6;
    color: var(--clr-text);
    overflow-x: hidden;
    background-color: var(--clr-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1 { font-size: var(--step-3); line-height: 1.1; }
h2 { font-size: var(--step-2); line-height: 1.15; }
h3 { font-size: var(--step-1); line-height: 1.2; }
p  { font-size: var(--step-0); line-height: 1.65; }
img, svg, video { max-width: 100%; height: auto; }
a, button { min-height: 44px; }

html { scroll-behavior: smooth; }

.container {
    width: min(1100px, 100% - 3rem);
    margin-inline: auto;
}
@media (max-width: 768px) { .container { width: min(1100px, 100% - 2rem); } }
@media (max-width: 480px) { .container { width: min(1100px, 100% - 1.25rem); } }

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(19, 24, 25, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    z-index: 1000;
    transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
    border-bottom: 1px solid var(--clr-border);
}

.navbar.scrolled {
    background: rgba(19, 24, 25, 0.96);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    width: min(1100px, 100% - 3rem);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}
@media (max-width: 768px) { .nav-container { width: min(1100px, 100% - 2rem); } }
@media (max-width: 480px) { .nav-container { width: min(1100px, 100% - 1.25rem); } }

.nav-logo a {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--clr-text);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: color var(--dur) var(--ease);
}
.nav-logo a:hover { color: var(--clr-accent); }

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.25rem;
}

.nav-toggle { display: none; background: none; border: 0; width: 40px; height: 40px; color: #fff; cursor: pointer; }
.nav-toggle span { display: block; height: 2px; margin: 6px 0; background: #fff; border-radius: 2px; transition: all var(--dur) var(--ease); }

.nav-link {
    color: var(--clr-text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--step--1);
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius-sm);
    transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
    position: relative;
}
.nav-link:hover {
    color: var(--clr-text);
    background: rgba(255, 255, 255, 0.06);
}
.nav-link.active {
    color: var(--clr-accent);
    background: rgba(0, 212, 255, 0.08);
}

/* Remove the old underline pseudo-element */
.nav-link::after { display: none; }

/* Language switcher */
.nav-lang-switch { margin-left: auto; padding-left: 1rem; display: flex; align-items: center; }
.nav-lang-switch .nav-link {
    display: inline-flex; align-items: center; justify-content: center;
    min-height: unset;
    font-size: 0.72rem; font-weight: 600; letter-spacing: 0.06em;
    color: var(--clr-text-muted);
    padding: 0.3rem 0.65rem;
    border: 1px solid var(--clr-border-hi);
    border-radius: var(--radius-sm);
    background: transparent;
    transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav-lang-switch .nav-link:hover {
    color: var(--clr-accent);
    border-color: rgba(0, 212, 255, 0.4);
    background: rgba(0, 212, 255, 0.06);
}

.hamburger { display: none; }

/* ===== Page Header (subpages) ===== */
.page-header {
    padding: calc(64px + 3.5rem) 0 3rem;
    background: var(--clr-bg);
    position: relative;
    text-align: center;
}
.page-header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: min(600px, 80%);
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--clr-border-hi), transparent);
}
.page-header h1 {
    font-size: var(--step-2);
    font-weight: 700;
    margin-bottom: 0.5rem;
}
.page-header p {
    color: var(--clr-text-muted);
    max-width: 520px;
    margin: 0 auto;
}

/* ===== Hero Section (home) ===== */
.hero {
    min-height: clamp(520px, 75vh, 880px);
    display: grid;
    align-items: center;
    background-image:
        linear-gradient(135deg, rgba(19, 24, 25, 0.92) 0%, rgba(30, 38, 41, 0.7) 50%, rgba(19, 24, 25, 0.92) 100%),
        url('../images/background.png');
    background-size: cover;
    background-position: center bottom;
    background-attachment: scroll;
    background-repeat: no-repeat;
    color: white;
    padding-top: 64px;
    position: relative;
    overflow: hidden;
    margin-bottom: 0;
    padding-bottom: 0;
}

body.page-home .hero {
    background-image:
        radial-gradient(ellipse at 65% 35%, rgba(0, 212, 255, 0.08), transparent 60%),
        linear-gradient(135deg, rgba(19, 24, 25, 0.92) 0%, rgba(19, 24, 25, 0.72) 55%, rgba(19, 24, 25, 0.92) 100%),
        url('../images/background.png');
}
body.page-home .hero-container {
    grid-template-columns: 1.2fr 0.8fr;
}

.hero::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: -1px;
    height: 180px;
    pointer-events: none;
    background: linear-gradient(to bottom, rgba(19, 24, 25, 0) 0%, var(--clr-bg) 100%);
    z-index: 1;
}

.hero-container {
    width: min(1100px, 100% - 3rem);
    margin-inline: auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content { max-width: 760px; }

.hero-title {
    font-size: var(--step-3);
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.hero-description {
    font-size: 1.15rem;
    margin-bottom: 2rem;
    color: var(--clr-text-muted);
    line-height: 1.65;
    max-width: 560px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}
body.page-home .hero-image { justify-content: flex-start; }

.hero-bubble {
    width: min(340px, 100%);
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-pill);
    overflow: hidden;
    position: relative;
    background: var(--clr-bg-card);
    border: 1px solid var(--clr-border-hi);
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(0, 212, 255, 0.06) inset;
}
.hero-bubble::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 30% 25%, rgba(0, 212, 255, 0.18), transparent 55%),
        radial-gradient(circle at 70% 75%, rgba(255, 210, 90, 0.08), transparent 60%);
    pointer-events: none;
    z-index: 1;
}
.hero-bubble-img {
    width: 105%; height: 105%;
    object-fit: cover;
    object-position: 50% center;
    display: block;
    opacity: 0.95;
    filter: saturate(1.05) contrast(1.03);
}

.hero-placeholder {
    width: min(520px, 100%);
    aspect-ratio: 16 / 9;
    background: var(--clr-bg-card);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    backdrop-filter: blur(10px);
    border: 1px solid var(--clr-border);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}
.hero-img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
    opacity: 0.95;
    filter: saturate(1.05) contrast(1.02);
}

/* ===== Buttons ===== */
.btn {
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-pill);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--step--1);
    transition: all var(--dur) var(--ease);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    gap: 0.5rem;
}
@media (max-width: 480px) { .btn { width: 100%; } }

.btn-primary {
    background: linear-gradient(135deg, var(--clr-accent) 0%, var(--clr-accent-2) 100%);
    color: white;
    box-shadow: 0 2px 12px rgba(0, 212, 255, 0.15);
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--clr-accent-2) 0%, #007799 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.25);
}

.btn-secondary {
    background: transparent;
    color: var(--clr-text);
    border: 1.5px solid var(--clr-border-hi);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--clr-text-muted);
    transform: translateY(-2px);
}

/* ===== Section Layout ===== */
.section {
    padding: var(--section-pad) 0;
    position: relative;
}

/* Alternating subtle background tints */
.section--alt {
    background: var(--clr-bg-raised);
}

/* ===== Section Headers ===== */
.section-header {
    text-align: center;
    margin: 0 auto 3.5rem;
}

.section-header h2 {
    font-size: var(--step-2);
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--clr-text);
    letter-spacing: -0.02em;
}

.section-header h2::after {
    content: "";
    display: block;
    width: 48px;
    height: 3px;
    background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent-2));
    border-radius: 2px;
    margin: 0.75rem auto 0;
}

.section-header p {
    font-size: var(--step-0);
    color: var(--clr-text-muted);
    max-width: 560px;
    margin: 0 auto;
}

/* Headers inside cards that shouldn't have underlines */
.projects-content .section-header h2::after,
.projects-content .section-header h3::after,
.spec-box .section-header h3::after { display: none; }

/* ===== About Section ===== */
.about {
    padding: var(--section-pad) 0;
    background: var(--clr-bg);
    position: relative;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text h3 {
    font-size: var(--step-1);
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--clr-text);
}

.about-text h4 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--clr-text);
    margin-bottom: 0.75rem;
    margin-top: 2rem;
}

.about-text p {
    font-size: var(--step-0);
    color: var(--clr-text-muted);
    margin-bottom: 1.25rem;
    line-height: 1.7;
}

/* ===== Card System ===== */
.card {
    padding: 2rem;
    background: var(--clr-bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--clr-border);
    transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 212, 255, 0.2);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(0, 212, 255, 0.06);
}

/* ===== Features Grid (Why section, About page) ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.feature {
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--clr-bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--clr-border);
    transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.feature:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 212, 255, 0.2);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

.feature i {
    font-size: 2rem;
    color: var(--clr-accent);
    margin-bottom: 1rem;
    display: inline-block;
}

.feature h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--clr-text);
}

.feature p {
    color: var(--clr-text-muted);
    line-height: 1.6;
    font-size: var(--step--1);
}

/* ===== Generic Grid ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1.5rem; }
@media (max-width: 768px) { .grid-2 { grid-template-columns: 1fr; } }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1.5rem; }
@media (max-width: 992px) { .grid-3 { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 768px) { .grid-3 { grid-template-columns: 1fr; } }

/* ===== Project Tags ===== */
.project-feature { grid-column: 1 / -1; }
.tag-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}
.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-pill);
    font-size: var(--step--1);
    color: var(--clr-text-muted);
    background: rgba(0, 212, 255, 0.06);
    border: 1px solid rgba(0, 212, 255, 0.12);
}

/* ===== Services Section ===== */
.services {
    padding: var(--section-pad) 0;
    background: var(--clr-bg-raised);
    position: relative;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.service-card {
    background: var(--clr-bg-card);
    padding: 2.25rem 2rem;
    border-radius: var(--radius-md);
    text-align: center;
    transition: all var(--dur) var(--ease);
    border: 1px solid var(--clr-border);
}
.service-card:hover {
    transform: translateY(-6px);
    border-color: rgba(0, 212, 255, 0.2);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3), 0 0 40px var(--clr-accent-glow);
}

.service-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-2));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    box-shadow: 0 4px 16px rgba(0, 212, 255, 0.2);
}

.service-icon i {
    font-size: 1.5rem;
    color: white;
}

.service-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--clr-text);
}

.service-card p {
    color: var(--clr-text-muted);
    line-height: 1.6;
    font-size: var(--step--1);
}

/* Technical specialization box */
.spec-box {
    margin-top: 3rem;
    padding: 2.5rem;
    background: rgba(0, 212, 255, 0.03);
    border-radius: var(--radius-lg);
    border: 1px solid var(--clr-border);
}
.spec-box .section-header {
    margin-bottom: 2rem;
}
.spec-box .section-header h3 {
    font-size: var(--step-1);
    font-weight: 600;
    color: var(--clr-text);
    margin-bottom: 0.5rem;
}
.spec-box .section-header p {
    color: var(--clr-text-muted);
}

/* ===== Projects Section ===== */
.projects {
    padding: var(--section-pad) 0;
    background: var(--clr-bg);
    position: relative;
}

.projects-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 2.5rem;
    background: var(--clr-bg-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

.projects-content h3 {
    font-size: var(--step-1);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--clr-text);
}

.projects-content .project-title {
    font-size: var(--step-2);
    font-weight: 700;
    color: var(--clr-text);
    line-height: 1.15;
    margin-bottom: 1rem;
    text-align: center;
}

.projects-content .project-subtitle {
    font-size: 1.2rem;
    color: var(--clr-text);
    line-height: 1.5;
    margin-bottom: 1.5rem;
}
.projects-content .project-subtitle .accent {
    color: var(--clr-accent);
}

.projects-content p {
    color: var(--clr-text-muted);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.projects-content ul {
    list-style: none;
    padding: 0;
    margin: 1rem 0 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem 1.5rem;
}

.projects-content li {
    position: relative;
    color: var(--clr-text-muted);
    line-height: 1.7;
    padding: 0.9rem 1rem 0.9rem 2.5rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
}

.projects-content li::before {
    content: "\f00c";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: var(--clr-accent);
    position: absolute;
    left: 0.9rem;
    top: 50%;
    transform: translateY(-50%);
}

/* ===== Why Section ===== */
.why-section {
    padding: var(--section-pad) 0;
    background: var(--clr-bg-raised);
    position: relative;
}

/* ===== Contact / CTA Section ===== */
.contact {
    padding: var(--section-pad) 0;
    background: var(--clr-bg);
    position: relative;
}

.cta-section {
    padding: var(--section-pad) 0;
    background: var(--clr-bg-raised);
    position: relative;
    text-align: center;
}
.cta-section .section-header {
    margin-bottom: 2rem;
}
.cta-section .section-header p {
    max-width: 480px;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--clr-bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--clr-border);
    transition: border-color var(--dur) var(--ease);
}
.contact-item:hover {
    border-color: var(--clr-border-hi);
}

.contact-item i {
    font-size: 1.25rem;
    color: var(--clr-accent);
    width: 40px;
    text-align: center;
    flex-shrink: 0;
}

.contact-item h4 {
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--clr-text);
    font-size: 1rem;
}

.contact-item p {
    color: var(--clr-text-muted);
    font-size: var(--step--1);
}

/* ===== Contact Form ===== */
.contact-form {
    background: var(--clr-bg-card);
    padding: 2rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--clr-border);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: var(--step--1);
    font-weight: 500;
    color: var(--clr-text-muted);
    margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1.5px solid var(--clr-border-hi);
    border-radius: var(--radius-sm);
    font-size: var(--step-0);
    transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
    font-family: inherit;
    background: rgba(255, 255, 255, 0.03);
    color: var(--clr-text);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--clr-accent);
    background: rgba(0, 212, 255, 0.04);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--clr-text-dim);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===== Section Dividers ===== */
.section + .section {
    border-top: 1px solid var(--clr-border);
}

.section--divider-accent {
    position: relative;
}
.section--divider-accent::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: min(600px, 80%);
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--clr-border-hi), transparent);
}

/* Anchor offset under fixed navbar */
.section { scroll-margin-top: 80px; }

/* ===== Footer ===== */
.footer {
    background: #0d1214;
    color: white;
    padding: 48px 0 20px;
    border-top: 1px solid var(--clr-border);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 0.75rem;
    color: var(--clr-text);
    font-size: 1rem;
    font-weight: 600;
}

.footer-section p {
    color: var(--clr-text-muted);
    line-height: 1.6;
    margin-bottom: 1rem;
    font-size: var(--step--1);
}

.footer-section ul { list-style: none; }

.footer-section ul li { margin-bottom: 0.4rem; }

.footer-section ul li a {
    color: var(--clr-text-muted);
    text-decoration: none;
    font-size: var(--step--1);
    transition: color var(--dur) var(--ease);
}
.footer-section ul li a:hover {
    color: var(--clr-accent);
}

.social-links {
    display: flex;
    gap: 0.75rem;
}

.social-links a {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--clr-text-muted);
    text-decoration: none;
    transition: all var(--dur) var(--ease);
    border: 1px solid var(--clr-border);
    font-size: 0.875rem;
}
.social-links a:hover {
    background: rgba(0, 212, 255, 0.1);
    color: var(--clr-accent);
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--clr-border);
    color: var(--clr-text-dim);
    font-size: var(--step--1);
}

/* ===== Responsive: Tablet ===== */
@media (max-width: 768px) {
    .nav-toggle { display: block; }
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        display: none;
        flex-direction: column;
        gap: 0;
        background: rgba(19, 24, 25, 0.98);
        backdrop-filter: blur(16px);
        border-top: 1px solid var(--clr-border);
        padding: 0.5rem 1rem;
    }
    .nav-menu.open { display: flex; }
    .nav-menu a { padding: 0.75rem 0; width: 100%; }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: left;
        gap: 2rem;
    }
    body.page-home .hero-container {
        grid-template-columns: 1fr;
    }
    body.page-home .hero-image {
        justify-content: center;
    }
    body.page-home .hero-bubble {
        width: min(340px, 100%);
    }

    .hero-title { font-size: var(--step-2); }
    .hero-description { max-width: 60ch; }
    .hero-buttons { justify-content: flex-start; }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .features-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }

    .projects-content {
        padding: 1.5rem;
    }
}

/* ===== Responsive: Mobile ===== */
@media (max-width: 480px) {
    .hero { padding-top: 72px; }
    .hero-title { font-size: var(--step-2); }
    .hero-placeholder { width: min(420px, 100%); opacity: 0.92; border-radius: var(--radius-md); }

    .btn { padding: 0.75rem 1.25rem; }

    .nav-logo a { font-size: 1.1rem; }

    .section-header { margin-bottom: 2.5rem; }
    .section-header h2 { font-size: 1.75rem; line-height: 1.2; }

    .feature,
    .service-card,
    .projects-content,
    .contact-form,
    .contact-item {
        padding: 1.25rem;
    }

    .contact-item { align-items: flex-start; }

    .service-icon { width: 56px; height: 56px; border-radius: 14px; }
    .service-icon i { font-size: 1.3rem; }

    .spec-box { padding: 1.25rem; }

    .page-header { padding: calc(64px + 2.5rem) 0 2rem; }
}

/* ===== Tables ===== */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; }

/* ===== Animations ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

.hero-content { animation: fadeInUp 0.7s var(--ease) both; }
.hero-image   { animation: fadeInUp 0.7s var(--ease) 0.15s both; }

.loading {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.loading.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Utility: remove border for section after hero ===== */
.section--after-hero { border-top: none !important; }