/* =========================================================================
   NK Tech — Design System & Site Styles  (v2, pure CSS, no framework)
   Palette: Deep Blue #0A3D62 · Neon #00D2FF · White
   -------------------------------------------------------------------------
   Sections:
   1. Design tokens (color, type, space, radius, shadow)
   2. Base & layout primitives
   3. Header / navigation
   4. Hero
   5. Sections & headings
   6. Buttons
   7. Cards, grids, tags, lists
   8. Stats
   9. Detailed blocks (services / projects)
   10. Values / team
   11. CTA banner
   12. Contact
   13. Footer
   14. Animations (reveal on scroll)
   15. Responsive
   ========================================================================= */

/* ------------------------------------------------------------------ */
/* 1. DESIGN TOKENS                                                    */
/* ------------------------------------------------------------------ */
:root {
	/* Brand palette */
	--nk-deep: #0a3d62;          /* deep tech blue */
	--nk-deep-700: #072e4a;
	--nk-deep-900: #04203a;      /* near-navy */
	--nk-neon: #00d2ff;          /* neon accent */
	--nk-neon-600: #00a6cc;

	/* Neutrals */
	--nk-white: #ffffff;
	--nk-ink: #0f2740;           /* primary text */
	--nk-muted: #5b6b7b;         /* secondary text */
	--nk-bg: #ffffff;
	--nk-bg-soft: #f2f7fb;       /* alt section bg */
	--nk-border: #e2eaf2;

	/* Semantic aliases (keep inline var() usage in page content working) */
	--nk-primary: var(--nk-deep);
	--nk-primary-dark: var(--nk-deep-900);
	--nk-accent: var(--nk-neon);
	--nk-dark: var(--nk-deep-900);
	--nk-text: var(--nk-ink);

	/* Gradients */
	--nk-grad: linear-gradient(135deg, var(--nk-deep) 0%, var(--nk-neon-600) 100%);
	--nk-grad-hero: radial-gradient(1100px 620px at 78% -18%, #134f7a 0%, var(--nk-deep) 42%, var(--nk-deep-900) 100%);

	/* Typography — fluid scale */
	--nk-font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
	--nk-fs-base: 1.0625rem;             /* 17px */
	--nk-fs-sm: 0.875rem;                /* 14px */
	--nk-fs-lead: clamp(1.05rem, 0.98rem + 0.4vw, 1.2rem);
	--nk-fs-h4: 1.05rem;
	--nk-fs-h3: clamp(1.2rem, 1.1rem + 0.5vw, 1.4rem);
	--nk-fs-h2: clamp(1.7rem, 1.3rem + 1.8vw, 2.6rem);
	--nk-fs-h1: clamp(2.1rem, 1.4rem + 3.4vw, 3.6rem);
	--nk-lh: 1.7;
	--nk-lh-tight: 1.18;

	/* Spacing scale (8px base) */
	--nk-space-1: 0.25rem;
	--nk-space-2: 0.5rem;
	--nk-space-3: 0.75rem;
	--nk-space-4: 1rem;
	--nk-space-5: 1.5rem;
	--nk-space-6: 2rem;
	--nk-space-7: 3rem;
	--nk-space-8: 4rem;
	--nk-section-y: clamp(3.5rem, 2rem + 6vw, 6.5rem);  /* vertical rhythm of sections */
	--nk-gap: clamp(1.25rem, 0.8rem + 1.6vw, 2rem);

	/* Radius & shadow */
	--nk-radius-sm: 10px;
	--nk-radius: 16px;
	--nk-radius-lg: 22px;
	--nk-shadow-sm: 0 2px 10px rgba(10, 61, 98, 0.06);
	--nk-shadow: 0 14px 40px rgba(10, 61, 98, 0.10);
	--nk-shadow-lg: 0 24px 60px rgba(10, 61, 98, 0.16);

	/* NK Card — unified card component (Services / Projects / Case Study / Showcase) */
	--nk-card-bg: #f8f9fa;
	--nk-card-border: #e5e7eb;
	--nk-card-radius: 12px;
	--nk-card-pad: 24px;
	--nk-card-gap: 32px;                              /* grid row & column gap */
	--nk-card-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
	--nk-card-shadow-hover: 0 4px 10px rgba(0, 0, 0, 0.06);

	/* Layout */
	--nk-container: 1180px;
	--nk-gutter: clamp(1.25rem, 0.5rem + 2.5vw, 2rem);
}

/* ------------------------------------------------------------------ */
/* 2. BASE & LAYOUT                                                    */
/* ------------------------------------------------------------------ */
*,
*::before,
*::after { box-sizing: border-box; }

body.nktech-page {
	margin: 0;
	font-family: var(--nk-font);
	font-size: var(--nk-fs-base);
	line-height: var(--nk-lh);
	color: var(--nk-ink);
	background: var(--nk-bg);
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
	overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--nk-deep); text-decoration: none; transition: color 0.18s ease; }
a:hover { color: var(--nk-neon-600); }

:focus-visible {
	outline: 3px solid var(--nk-neon);
	outline-offset: 2px;
	border-radius: 4px;
}

.nk-content { margin: 0; }

.nk-container {
	width: 100%;
	max-width: var(--nk-container);
	margin-inline: auto;
	padding-inline: var(--nk-gutter);
}

/* ------------------------------------------------------------------ */
/* 3. HEADER / NAVIGATION                                              */
/* ------------------------------------------------------------------ */
.nk-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: rgba(255, 255, 255, 0.82);
	backdrop-filter: saturate(160%) blur(12px);
	-webkit-backdrop-filter: saturate(160%) blur(12px);
	border-bottom: 1px solid var(--nk-border);
}
.nk-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	min-height: 74px;
	gap: var(--nk-space-4);
}
.nk-brand {
	display: inline-flex;
	align-items: center;
	gap: 0.625rem;
	font-weight: 800;
	font-size: 1.05rem;
	letter-spacing: 0.2px;
	color: var(--nk-deep-900);
}
.nk-brand:hover { color: var(--nk-deep-900); }
.nk-brand__logo {
	display: block;
	height: 44px;
	width: auto;
	max-width: 220px;
	object-fit: contain;
}
.nk-brand__logo--footer {
	height: 52px;
	max-width: 240px;
}
.nk-brand__mark {
	display: inline-grid;
	place-items: center;
	width: 40px;
	height: 40px;
	border-radius: 11px;
	background: var(--nk-grad);
	color: #fff;
	font-weight: 800;
	box-shadow: 0 6px 16px rgba(0, 210, 255, 0.32);
}
.nk-nav { display: flex; align-items: center; gap: 0.25rem; }
.nk-nav__link {
	position: relative;
	padding: 0.6rem 0.9rem;
	border-radius: var(--nk-radius-sm);
	color: var(--nk-ink);
	font-weight: 600;
	font-size: 0.95rem;
}
.nk-nav__link::after {
	content: "";
	position: absolute;
	left: 0.9rem;
	right: 0.9rem;
	bottom: 0.35rem;
	height: 2px;
	background: var(--nk-neon);
	transform: scaleX(0);
	transform-origin: left;
	transition: transform 0.22s ease;
}
.nk-nav__link:hover { color: var(--nk-deep); background: var(--nk-bg-soft); }
.nk-nav__link:hover::after,
.nk-nav__link.is-active::after { transform: scaleX(1); }
.nk-nav__link.is-active { color: var(--nk-deep); }
.nk-nav__cta {
	margin-left: 0.5rem;
	padding: 0.62rem 1.25rem;
	border-radius: 999px;
	background: var(--nk-grad);
	color: #fff !important;
	font-weight: 700;
	font-size: 0.95rem;
	box-shadow: 0 8px 20px rgba(0, 210, 255, 0.28);
}
.nk-nav__cta:hover { transform: translateY(-1px); filter: brightness(1.05); }

/* Language switcher (VI / EN) */
.nk-lang {
	display: inline-flex;
	align-items: center;
	gap: 2px;
	margin-left: 0.6rem;
	padding: 3px;
	border: 1px solid var(--nk-border);
	border-radius: 999px;
	background: #fff;
}
.nk-lang__link {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 34px;
	padding: 0.3rem 0.55rem;
	border-radius: 999px;
	font-weight: 700;
	font-size: 0.82rem;
	letter-spacing: 0.03em;
	color: var(--nk-muted);
	text-decoration: none;
	transition: background 0.2s ease, color 0.2s ease;
}
.nk-lang__link:hover { color: var(--nk-deep); }
.nk-lang__link.is-active {
	background: var(--nk-grad);
	color: #fff;
	box-shadow: 0 4px 12px rgba(0, 210, 255, 0.28);
}
.nk-nav-toggle,
.nk-nav-burger { display: none; }

/* ------------------------------------------------------------------ */
/* 4. HERO                                                             */
/* ------------------------------------------------------------------ */
.nk-hero {
	position: relative;
	color: #eaf4fb;
	background: var(--nk-grad-hero);
	padding-block: clamp(4.5rem, 3rem + 8vw, 7.5rem);
	overflow: hidden;
}
.nk-hero::before {
	content: "";
	position: absolute;
	inset: 0;
	background-image:
		linear-gradient(rgba(0, 210, 255, 0.08) 1px, transparent 1px),
		linear-gradient(90deg, rgba(0, 210, 255, 0.08) 1px, transparent 1px);
	background-size: 46px 46px;
	-webkit-mask-image: radial-gradient(760px 440px at 72% 4%, #000 0%, transparent 72%);
	mask-image: radial-gradient(760px 440px at 72% 4%, #000 0%, transparent 72%);
	pointer-events: none;
}
.nk-hero::after {
	content: "";
	position: absolute;
	width: 420px;
	height: 420px;
	right: -80px;
	top: -120px;
	background: radial-gradient(circle, rgba(0, 210, 255, 0.35), transparent 60%);
	filter: blur(40px);
	pointer-events: none;
}
.nk-hero__inner { position: relative; z-index: 1; max-width: 780px; }
.nk-hero h1 {
	font-size: var(--nk-fs-h1);
	line-height: var(--nk-lh-tight);
	font-weight: 800;
	margin: 0 0 var(--nk-space-5);
	letter-spacing: -0.5px;
}
.nk-hero__sub {
	font-size: var(--nk-fs-lead);
	color: #b8d4e8;
	margin: 0 0 var(--nk-space-7);
	max-width: 60ch;
}
.nk-hero__highlight {
	color: var(--nk-neon);
	text-shadow: 0 0 24px rgba(0, 210, 255, 0.45);
}

/* ------------------------------------------------------------------ */
/* 5. SECTIONS & HEADINGS                                              */
/* ------------------------------------------------------------------ */
.nk-section { padding-block: var(--nk-section-y); }
.nk-section--soft { background: var(--nk-bg-soft); }
.nk-section--dark {
	background: var(--nk-grad-hero);
	color: #e8f3fb;
}

.nk-section__head {
	max-width: 760px;
	margin: 0 auto var(--nk-space-8);
	text-align: center;
}

h1, h2, h3, h4 { color: inherit; line-height: var(--nk-lh-tight); }
.nk-section h2 {
	font-size: var(--nk-fs-h2);
	font-weight: 800;
	letter-spacing: -0.4px;
	margin: 0 0 var(--nk-space-4);
}
.nk-section h3 { font-size: var(--nk-fs-h3); font-weight: 700; }
.nk-section h4 { font-size: var(--nk-fs-h4); font-weight: 700; margin: var(--nk-space-5) 0 var(--nk-space-2); color: var(--nk-deep); }
.nk-section--dark h4 { color: #cfe9f6; }

.nk-eyebrow {
	display: inline-block;
	font-size: 0.8rem;
	font-weight: 700;
	letter-spacing: 2px;
	text-transform: uppercase;
	color: var(--nk-neon-600);
	margin-bottom: var(--nk-space-3);
}
.nk-section--dark .nk-eyebrow,
.nk-hero .nk-eyebrow { color: var(--nk-neon); }

.nk-lead {
	font-size: var(--nk-fs-lead);
	color: var(--nk-muted);
	line-height: 1.75;
}
.nk-section--dark .nk-lead { color: #b8d4e8; }

/* ------------------------------------------------------------------ */
/* 6. BUTTONS                                                          */
/* ------------------------------------------------------------------ */
.nk-btns { display: flex; flex-wrap: wrap; gap: var(--nk-space-4); }
.nk-btn {
	display: inline-flex;
	align-items: center;
	gap: 0.4rem;
	padding: 0.85rem 1.6rem;
	border-radius: 999px;
	font-weight: 700;
	font-size: 0.98rem;
	line-height: 1;
	cursor: pointer;
	border: 1.5px solid transparent;
	transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease, filter 0.16s ease;
}
.nk-btn:hover { transform: translateY(-2px); }
.nk-btn--primary { background: var(--nk-grad); color: #fff; box-shadow: 0 10px 26px rgba(0, 210, 255, 0.30); }
.nk-btn--primary:hover { filter: brightness(1.06); box-shadow: 0 14px 32px rgba(0, 210, 255, 0.40); color: #fff; }
.nk-btn--light { background: #fff; color: var(--nk-deep); }
.nk-btn--light:hover { color: var(--nk-deep); box-shadow: var(--nk-shadow); }
.nk-btn--ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.5); }
.nk-btn--ghost:hover { background: rgba(255, 255, 255, 0.1); color: #fff; border-color: #fff; }

/* WordPress core button blocks inherit the brand look */
.nk-content .wp-block-button__link {
	background: var(--nk-grad);
	border-radius: 999px;
	padding: 0.85rem 1.6rem;
	font-weight: 700;
	box-shadow: 0 10px 26px rgba(0, 210, 255, 0.30);
}
.nk-content .wp-block-button__link:hover { filter: brightness(1.06); }

/* Center every Gutenberg button block site-wide (CSS only). */
.wp-block-buttons {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: var(--nk-space-3);
	margin-top: var(--nk-space-5); /* ~24px: one line of space above the buttons */
}
.wp-block-button {
	margin-left: auto;
	margin-right: auto;
}

/* ------------------------------------------------------------------ */
/* 7. CARDS / GRIDS / TAGS / LISTS                                     */
/* ------------------------------------------------------------------ */
.nk-grid { display: grid; gap: var(--nk-card-gap); align-items: stretch; grid-auto-rows: 1fr; }
.nk-grid--2 { grid-template-columns: repeat(2, 1fr); }
.nk-grid--3 { grid-template-columns: repeat(3, 1fr); }

.nk-card {
	display: flex;
	flex-direction: column;
	gap: var(--nk-space-2);
	height: 100%; /* fill the equal-height grid cell */
	background: var(--nk-card-bg);
	border: 1px solid var(--nk-card-border);
	border-radius: var(--nk-card-radius);
	padding: var(--nk-card-pad);
	box-shadow: var(--nk-card-shadow);
	transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.nk-card:hover {
	transform: scale(1.02);
	box-shadow: var(--nk-card-shadow-hover);
}
/* NK Card typography (shared spec) */
.nk-card h3 { margin: 0 0 var(--nk-space-2); font-size: 20px; font-weight: 600; line-height: 1.3; }
.nk-card p { margin: 0 0 var(--nk-space-3); color: var(--nk-muted); font-size: 16px; line-height: 1.6; }
.nk-card p:last-child { margin-bottom: 0; }
.nk-card li { margin-bottom: 8px; }
.nk-card__icon {
	width: 56px;
	height: 56px;
	border-radius: 14px;
	display: grid;
	place-items: center;
	background: var(--nk-grad);
	color: #fff;
	font-size: 24px;
	font-weight: 800;
	margin-bottom: var(--nk-space-4);
	box-shadow: 0 8px 20px rgba(0, 210, 255, 0.28);
}

.nk-tags { display: flex; flex-wrap: wrap; gap: var(--nk-space-2); margin-top: var(--nk-space-2); }
.nk-tag {
	font-size: 0.78rem;
	font-weight: 600;
	padding: 0.3rem 0.7rem;
	border-radius: 999px;
	background: rgba(0, 210, 255, 0.10);
	color: var(--nk-deep);
	border: 1px solid rgba(0, 210, 255, 0.25);
}

.nk-list, .nk-content .wp-block-list { margin: 0; padding-left: 1.25rem; color: var(--nk-muted); }
.nk-list li, .nk-content .wp-block-list li { margin: var(--nk-space-2) 0; line-height: 1.6; }
.nk-list li::marker, .nk-content .wp-block-list li::marker { color: var(--nk-neon-600); }

/* ------------------------------------------------------------------ */
/* 8. STATS                                                            */
/* ------------------------------------------------------------------ */
.nk-stats {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: var(--nk-gap);
	margin-top: var(--nk-space-8);
	padding-top: var(--nk-space-6);
	border-top: 1px solid rgba(255, 255, 255, 0.14);
}
.nk-stat { text-align: center; }
.nk-stat__num {
	font-size: clamp(1.8rem, 1.4rem + 1.5vw, 2.4rem);
	font-weight: 800;
	color: var(--nk-neon);
	line-height: 1;
}
.nk-stat__label { color: #a9c6dc; font-size: 0.9rem; margin-top: var(--nk-space-2); }

/* ------------------------------------------------------------------ */
/* 9. DETAILED BLOCKS (services / projects)                            */
/* ------------------------------------------------------------------ */
.nk-block {
	border: 1px solid var(--nk-border);
	border-radius: var(--nk-radius-lg);
	padding: clamp(1.75rem, 1rem + 2.5vw, 2.75rem);
	margin-bottom: var(--nk-gap);
	background: #fff;
	box-shadow: var(--nk-shadow);
	position: relative;
	overflow: hidden;
}
.nk-block::before {
	content: "";
	position: absolute;
	left: 0; top: 0; bottom: 0;
	width: 5px;
	background: var(--nk-grad);
}
.nk-block__head { display: flex; align-items: center; gap: var(--nk-space-4); margin-bottom: var(--nk-space-4); }
.nk-block h2 { font-size: var(--nk-fs-h3); margin: 0; }
.nk-subgrid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--nk-gap); margin-top: var(--nk-space-4); }
.nk-subgrid h4 { margin: 0 0 var(--nk-space-2); color: var(--nk-deep); }

/* ------------------------------------------------------------------ */
/* 10. VALUES / TEAM                                                   */
/* ------------------------------------------------------------------ */
.nk-value {
	padding: clamp(1.4rem, 1rem + 1vw, 1.9rem);
	border-radius: var(--nk-radius);
	background: var(--nk-bg-soft);
	border: 1px solid var(--nk-border);
	transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.nk-value:hover { transform: translateY(-4px); box-shadow: var(--nk-shadow); }
.nk-value h3 { font-size: 1.1rem; margin: 0 0 var(--nk-space-2); }

.nk-team-card { text-align: center; align-items: center; }
.nk-team-avatar {
	width: 96px;
	height: 96px;
	border-radius: 50%;
	display: grid;
	place-items: center;
	font-size: 1.55rem;
	font-weight: 800;
	color: #fff;
	background: var(--nk-grad);
	margin: 0 auto var(--nk-space-4);
	box-shadow: 0 10px 24px rgba(0, 210, 255, 0.3);
}
.nk-team-role { color: var(--nk-neon-600); font-weight: 600; margin: 0 0 var(--nk-space-2); }

/* ------------------------------------------------------------------ */
/* 11. CTA BANNER                                                      */
/* ------------------------------------------------------------------ */
.nk-cta {
	text-align: center;
	background: var(--nk-grad);
	color: #fff;
	border-radius: var(--nk-radius-lg);
	padding: clamp(2.5rem, 1.5rem + 4vw, 4rem) var(--nk-space-6);
	box-shadow: var(--nk-shadow-lg);
	position: relative;
	overflow: hidden;
}
.nk-cta::after {
	content: "";
	position: absolute;
	inset: 0;
	background-image:
		linear-gradient(rgba(255, 255, 255, 0.10) 1px, transparent 1px),
		linear-gradient(90deg, rgba(255, 255, 255, 0.10) 1px, transparent 1px);
	background-size: 40px 40px;
	-webkit-mask-image: radial-gradient(500px 300px at 80% 0%, #000, transparent 70%);
	mask-image: radial-gradient(500px 300px at 80% 0%, #000, transparent 70%);
}
.nk-cta > * { position: relative; z-index: 1; }
.nk-cta h2 { color: #fff; margin: 0 0 var(--nk-space-3); }
.nk-cta .nk-lead { color: rgba(255, 255, 255, 0.9); margin: 0 auto; max-width: 56ch; }

/* ------------------------------------------------------------------ */
/* 12. CONTACT                                                         */
/* ------------------------------------------------------------------ */
.nk-contact-grid {
	display: grid;
	grid-template-columns: 1fr 1.15fr;
	gap: clamp(1.5rem, 1rem + 3vw, 3rem);
	align-items: start;
}
.nk-info-list { list-style: none; margin: var(--nk-space-5) 0 0; padding: 0; }
.nk-info-list li {
	display: flex;
	gap: var(--nk-space-4);
	padding: var(--nk-space-4) 0;
	border-bottom: 1px solid var(--nk-border);
}
.nk-info-list li:last-child { border-bottom: 0; }
.nk-info-ico {
	flex: 0 0 auto;
	font-size: 1.2rem;
	width: 42px;
	height: 42px;
	display: grid;
	place-items: center;
	border-radius: 11px;
	background: rgba(0, 210, 255, 0.10);
}
.nk-form {
	background: #fff;
	border: 1px solid var(--nk-border);
	border-radius: var(--nk-radius-lg);
	padding: clamp(1.5rem, 1rem + 2vw, 2.4rem);
	box-shadow: var(--nk-shadow);
}
.nk-form h3 { margin: 0 0 var(--nk-space-5); }
.nk-field { margin-bottom: var(--nk-space-5); }
.nk-field label { display: block; font-weight: 600; margin-bottom: var(--nk-space-2); font-size: 0.92rem; }
.nk-field input,
.nk-field textarea,
.nk-field select {
	width: 100%;
	padding: 0.8rem 0.95rem;
	border: 1.5px solid var(--nk-border);
	border-radius: var(--nk-radius-sm);
	font: inherit;
	color: var(--nk-ink);
	background: #fbfdff;
	transition: border-color 0.16s ease, box-shadow 0.16s ease;
}
.nk-field input:focus,
.nk-field textarea:focus,
.nk-field select:focus {
	outline: none;
	border-color: var(--nk-neon);
	box-shadow: 0 0 0 4px rgba(0, 210, 255, 0.16);
}
.nk-field textarea { resize: vertical; min-height: 120px; }
.nk-notice { padding: 0.85rem 1rem; border-radius: var(--nk-radius-sm); margin-bottom: var(--nk-space-5); font-weight: 600; font-size: 0.92rem; }
.nk-notice--ok { background: #e3f9f1; color: #066b56; border: 1px solid #b3e8da; }
.nk-notice--err { background: #fdecec; color: #9b1c1c; border: 1px solid #f3c2c2; }

/* ------------------------------------------------------------------ */
/* 13. FOOTER                                                          */
/* ------------------------------------------------------------------ */
.nk-footer { background: var(--nk-deep-900); color: #b7cadb; }
.nk-footer__grid {
	display: grid;
	grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
	gap: var(--nk-space-7);
	padding-block: clamp(3rem, 2rem + 3vw, 4.5rem) var(--nk-space-7);
	padding-inline: var(--nk-gutter);
	max-width: var(--nk-container);
	margin-inline: auto;
}
.nk-footer__title { color: #fff; font-size: 1rem; margin: 0 0 var(--nk-space-4); }
.nk-footer__list { list-style: none; margin: 0; padding: 0; }
.nk-footer__list li { margin: var(--nk-space-2) 0; }
.nk-footer__list a { color: #b7cadb; }
.nk-footer__list a:hover { color: var(--nk-neon); }
.nk-brand--footer { color: #fff; margin-bottom: var(--nk-space-4); }
.nk-footer__about { color: #8ba6bf; font-size: 0.92rem; line-height: 1.65; }
.nk-footer__contact strong { color: #fff; font-weight: 600; }
.nk-footer__bottom { border-top: 1px solid rgba(255, 255, 255, 0.08); }
.nk-footer__bottom p {
	margin: 0;
	padding-block: var(--nk-space-5);
	font-size: 0.85rem;
	color: #7d97b0;
	text-align: center;
}

/* ------------------------------------------------------------------ */
/* 14. ANIMATIONS — reveal on scroll (progressive enhancement)         */
/*     Elements are only hidden when JS is active (html.nk-js),         */
/*     so content stays visible if JS fails.                            */
/* ------------------------------------------------------------------ */
@keyframes nkFadeUp {
	from { opacity: 0; transform: translateY(26px); }
	to   { opacity: 1; transform: none; }
}
@keyframes nkHeroIn {
	from { opacity: 0; transform: translateY(18px); }
	to   { opacity: 1; transform: none; }
}

/* Hero animates immediately on load */
.nk-hero__inner > * { animation: nkHeroIn 0.7s cubic-bezier(0.22, 1, 0.36, 1) both; }
.nk-hero__inner > *:nth-child(2) { animation-delay: 0.08s; }
.nk-hero__inner > *:nth-child(3) { animation-delay: 0.16s; }
.nk-hero__inner > *:nth-child(4) { animation-delay: 0.24s; }

/* Scroll reveal targets (class added by JS) */
.nk-js .nk-reveal { opacity: 0; transform: translateY(26px); }
.nk-js .nk-reveal.is-visible {
	animation: nkFadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
/* Stagger items inside a grid */
.nk-js .nk-reveal[style*="--nk-delay"] { animation-delay: var(--nk-delay); }

@media (prefers-reduced-motion: reduce) {
	*, .nk-hero__inner > * { animation: none !important; transition: none !important; }
	.nk-js .nk-reveal { opacity: 1; transform: none; }
}

/* ------------------------------------------------------------------ */
/* 15. RESPONSIVE                                                      */
/* ------------------------------------------------------------------ */
@media (max-width: 1024px) {
	.nk-grid--3 { grid-template-columns: repeat(2, 1fr); }
	.nk-footer__grid { grid-template-columns: 1fr 1fr; gap: var(--nk-space-6); }
}

@media (max-width: 768px) {
	/* Mobile navigation */
	.nk-nav {
		position: fixed;
		inset: 74px 0 auto 0;
		flex-direction: column;
		align-items: stretch;
		gap: 0;
		background: #fff;
		padding: var(--nk-space-3) var(--nk-gutter) var(--nk-space-5);
		border-bottom: 1px solid var(--nk-border);
		box-shadow: var(--nk-shadow);
		transform: translateY(-130%);
		transition: transform 0.28s ease;
	}
	.nk-nav__link { padding: 0.85rem 0.5rem; border-radius: 0; }
	.nk-nav__link::after { display: none; }
	.nk-nav__cta { margin: var(--nk-space-3) 0 0; text-align: center; }
	.nk-lang { margin: var(--nk-space-3) auto 0; }
	.nk-nav-toggle:checked ~ .nk-nav { transform: translateY(0); }
	.nk-nav-burger {
		display: inline-flex;
		flex-direction: column;
		justify-content: center;
		gap: 5px;
		width: 44px;
		height: 44px;
		cursor: pointer;
	}
	.nk-nav-burger span {
		width: 24px;
		height: 2px;
		background: var(--nk-deep-900);
		border-radius: 2px;
		transition: transform 0.25s ease, opacity 0.25s ease;
	}
	.nk-nav-toggle:checked ~ .nk-nav-burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
	.nk-nav-toggle:checked ~ .nk-nav-burger span:nth-child(2) { opacity: 0; }
	.nk-nav-toggle:checked ~ .nk-nav-burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

	.nk-grid--2,
	.nk-grid--3,
	.nk-subgrid,
	.nk-contact-grid { grid-template-columns: 1fr; }

	.nk-stats { grid-template-columns: repeat(2, 1fr); gap: var(--nk-space-5); }
	.nk-block__head { flex-direction: row; }
}

@media (max-width: 480px) {
	.nk-footer__grid { grid-template-columns: 1fr; }
	.nk-stats { grid-template-columns: 1fr 1fr; }
	.nk-btns { flex-direction: column; align-items: stretch; }
	.nk-btn { justify-content: center; }
}

/* ------------------------------------------------------------------ */
/* 12. BALANCED 4-CARD GRID (e.g. "Vì sao doanh nghiệp chọn NK TECH")  */
/* Scoped via :has() to a 3-col grid that holds EXACTLY 4 cards, so    */
/* the 3+1 wrap becomes an even, equal-height, centred layout without  */
/* touching the 3 / 5 / 6-card grids elsewhere. CSS only — no markup,  */
/* class, ID or colour changes.                                        */
/* ------------------------------------------------------------------ */
.nk-grid--3:has(> .nk-card:nth-child(4):last-child) {
	grid-template-columns: repeat(4, 1fr); /* one even row of 4 */
	grid-auto-rows: 1fr;                    /* all cards equal height */
	align-items: stretch;
}
.nk-grid--3:has(> .nk-card:nth-child(4):last-child) > .nk-card {
	height: 100%;
	align-items: flex-start;   /* unified NK Card: left-aligned like media cards */
	justify-content: flex-start;
	text-align: left;
}

@media (max-width: 1024px) {
	/* 4 cards -> balanced 2 x 2 on tablet */
	.nk-grid--3:has(> .nk-card:nth-child(4):last-child) {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (max-width: 768px) {
	/* single column on mobile */
	.nk-grid--3:has(> .nk-card:nth-child(4):last-child) {
		grid-template-columns: 1fr;
	}
}

/* ------------------------------------------------------------------ */
/* 13. SITE-WIDE EQUAL-HEIGHT + LEFT-ALIGNED CARDS (unified NK Card)   */
/* Works on the original classes (.nk-grid / .nk-card) AND on the      */
/* helper classes (.equal-row / .equal-box) that functions.php appends */
/* at render time. No :has() -> compatible with every browser. The     */
/* grid display + responsive breakpoints of .nk-grid are preserved, so */
/* equal-row does NOT switch to flex (which would break responsive).   */
/* ------------------------------------------------------------------ */

/* Row: keep grid layout, just ensure cells stretch to equal height. */
.equal-row { align-items: stretch; }

/* Drop WordPress' default top margin (margin-block-start: 1.2rem) on every
   box so the first box lines up with the rest of the row in all sections. */
.nk-grid > .nk-card,
.equal-row > .equal-box,
.nk-card,
.equal-box {
	margin-block-start: 0;
	margin-top: 0;
}

/* Box: fill the equal-height cell; content flows from the top, left-aligned
   (unified "NK Card": same alignment as the image/media cards on Projects). */
.nk-card,
.equal-box {
	display: flex;
	flex-direction: column;
	align-items: flex-start;    /* icon / title / desc aligned left */
	justify-content: flex-start; /* content flows from the top */
	height: 100%;
	text-align: left;
}

/* Tag row aligns left with the rest of the card content. */
.nk-card .nk-tags,
.equal-box .nk-tags {
	justify-content: flex-start;
}

/* On a single-column layout, let cards size to their own content
   (avoid stretching a short card to match a tall one). */
@media (max-width: 768px) {
	.nk-grid { grid-auto-rows: auto; }
}

/* ------------------------------------------------------------------ */
/* 14. LEADERSHIP (Ban lãnh đạo) — avatar cards + bio modal           */
/* ------------------------------------------------------------------ */
.nk-leaders__grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: var(--nk-gap);
}
.nk-leader {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: flex-start;
	gap: var(--nk-space-3);
	text-align: center;
	height: 100%;
	margin: 0;
	padding: clamp(1.6rem, 1rem + 1.6vw, 2.3rem);
	font: inherit;
	color: inherit;
	background: var(--nk-bg);
	border: 1px solid var(--nk-border);
	border-radius: var(--nk-radius);
	box-shadow: var(--nk-shadow-sm);
	cursor: pointer;
	transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.nk-leader:hover,
.nk-leader:focus-visible {
	transform: translateY(-6px);
	box-shadow: var(--nk-shadow-lg);
	border-color: rgba(0, 210, 255, 0.4);
	outline: none;
}
.nk-leader__avatar,
.nk-modal__avatar {
	width: 108px;
	height: 108px;
	border-radius: 50%;
	display: grid;
	place-items: center;
	font-size: 1.7rem;
	font-weight: 800;
	letter-spacing: 0.02em;
	color: #fff;
	background: var(--nk-grad);
	box-shadow: 0 10px 24px rgba(0, 210, 255, 0.3);
}
/* Uploaded avatar image fills the circle without distortion. */
img.nk-leader__avatar,
img.nk-modal__avatar {
	object-fit: cover;
	background: var(--nk-bg-soft);
}
.nk-leader__title {
	font-weight: 700;
	font-size: 1.05rem;
	color: var(--nk-deep);
	line-height: 1.4;
}
.nk-leader__more {
	font-size: 0.85rem;
	font-weight: 600;
	color: var(--nk-neon-600);
}

/* Modal */
body.nk-modal-open { overflow: hidden; }
.nk-modal[hidden] { display: none; }
.nk-modal {
	position: fixed;
	inset: 0;
	z-index: 1000;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: var(--nk-space-5);
}
.nk-modal__overlay {
	position: absolute;
	inset: 0;
	background: rgba(4, 32, 58, 0.62);
	backdrop-filter: blur(2px);
}
.nk-modal__dialog {
	position: relative;
	z-index: 1;
	width: min(560px, 100%);
	max-height: 86vh;
	overflow-y: auto;
	text-align: center;
	background: #fff;
	border-radius: var(--nk-radius-lg);
	padding: clamp(1.8rem, 1rem + 2vw, 2.8rem);
	box-shadow: var(--nk-shadow-lg);
	animation: nkModalIn 0.25s ease;
}
@keyframes nkModalIn {
	from { opacity: 0; transform: translateY(16px) scale(0.98); }
	to   { opacity: 1; transform: none; }
}
.nk-modal__dialog .nk-modal__avatar { margin: 0 auto var(--nk-space-3); }
.nk-modal__name { margin: 0 0 var(--nk-space-1); font-size: 1.4rem; }
.nk-modal__role { margin: 0 0 var(--nk-space-3); color: var(--nk-neon-600); font-weight: 600; }
.nk-modal__bio { margin: 0; color: var(--nk-ink); line-height: 1.75; text-align: left; }
.nk-modal__close {
	position: absolute;
	top: 10px;
	right: 12px;
	width: 40px;
	height: 40px;
	border: none;
	border-radius: 50%;
	background: var(--nk-bg-soft);
	color: var(--nk-deep);
	font-size: 1.6rem;
	line-height: 1;
	cursor: pointer;
	transition: background 0.2s ease;
}
.nk-modal__close:hover { background: var(--nk-border); }

@media (prefers-reduced-motion: reduce) {
	.nk-modal__dialog { animation: none; }
}
@media (max-width: 768px) {
	.nk-leaders__grid { grid-template-columns: 1fr; }
}

/* ------------------------------------------------------------------ */
/* 15. PROJECTS PAGE — hero image, project cards, case study, process  */
/*     Self-contained; only used by the /projects page markup.         */
/* ------------------------------------------------------------------ */

/* Modern project card with full-bleed cover image. Uses its own class
   (not .nk-card) so the equal-height filter leaves it alone; equal height
   is handled here via the grid + height:100%. */
/* Flex (not grid) so an incomplete last row (e.g. 5 cards -> 3 + 2) stays
   centred instead of dumping the orphans to the left. Up to 3 per row. */
.nk-pgrid { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--nk-card-gap); }
.nk-pgrid > .nk-pcard { flex: 1 1 300px; max-width: calc((100% - 2 * var(--nk-card-gap)) / 3); }

.nk-pcard {
	display: flex;
	flex-direction: column;
	height: 100%;
	background: var(--nk-card-bg);
	border: 1px solid var(--nk-card-border);
	border-radius: var(--nk-card-radius);
	overflow: hidden;
	box-shadow: var(--nk-card-shadow);
	transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.nk-pcard:hover {
	transform: scale(1.02);
	box-shadow: var(--nk-card-shadow-hover);
}
.nk-pcard__media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--nk-bg-soft); }
/* Uniform brand scrim so real screenshots and branded covers read as one set. */
.nk-pcard__media::after {
	content: "";
	position: absolute;
	inset: 0;
	background: linear-gradient(to top, rgba(4, 32, 58, 0.20) 0%, transparent 42%);
	pointer-events: none;
}
.nk-pcard__media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.nk-pcard__body {
	display: flex;
	flex-direction: column;
	gap: var(--nk-space-2);
	flex: 1 1 auto;
	padding: var(--nk-card-pad);   /* NK Card: 24px */
}
.nk-pcard__body h3 { margin: 0; font-size: 20px; font-weight: 600; line-height: 1.3; }
.nk-pcard__body > p { margin: 0; color: var(--nk-muted); font-size: 16px; line-height: 1.6; }
.nk-pcard__results { margin: 0; padding-left: 1.15rem; color: var(--nk-muted); font-size: 16px; }
.nk-pcard__results li { margin-bottom: 8px; line-height: 1.6; }
.nk-pcard__results li::marker { color: var(--nk-neon-600); }
.nk-pcard__foot { margin-top: auto; padding-top: var(--nk-space-3); }
.nk-pcard__link { display: inline-flex; align-items: center; gap: 0.35rem; font-weight: 700; color: var(--nk-neon-600); }
.nk-pcard__link:hover { color: var(--nk-deep); }

/* Case study: content + large image, side by side. */
.nk-case { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(1.5rem, 1rem + 3vw, 3.5rem); align-items: center; }
.nk-case__media { border: 1px solid var(--nk-card-border); border-radius: var(--nk-card-radius); overflow: hidden; box-shadow: var(--nk-card-shadow); }
.nk-case__media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.nk-case__list { list-style: none; margin: var(--nk-space-5) 0 0; padding: 0; }
.nk-case__list li { position: relative; padding: 0.5rem 0 0.5rem 1.9rem; border-bottom: 1px solid var(--nk-border); }
.nk-case__list li:last-child { border-bottom: 0; }
.nk-case__list li::before { content: "✓"; position: absolute; left: 0; top: 0.5rem; color: var(--nk-neon-600); font-weight: 800; }

/* Wide context image strip (e.g. above the delivery process). */
.nk-figure { border-radius: var(--nk-radius-lg); overflow: hidden; box-shadow: var(--nk-shadow); margin-bottom: var(--nk-space-7); }
.nk-figure img { width: 100%; max-height: 340px; object-fit: cover; display: block; }

@media (max-width: 1024px) {
	.nk-pgrid > .nk-pcard { max-width: calc((100% - var(--nk-card-gap)) / 2); } /* 2 per row */
}
@media (max-width: 768px) {
	.nk-pgrid > .nk-pcard { flex-basis: 100%; max-width: 100%; }         /* 1 per row */
	.nk-case { grid-template-columns: 1fr; }
	.nk-case__media { order: -1; }
}

/* Screenshot gallery (project detail pages). object-fit:contain frames each
   screenshot on a soft background so portrait + landscape shots both show in
   full without ugly cropping. Each tile links to the full image (no JS). */
.nk-gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: var(--nk-card-gap); }
.nk-gallery--phone { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
.nk-gallery__item {
	display: block;
	aspect-ratio: 4 / 3;
	background: var(--nk-card-bg);
	border: 1px solid var(--nk-card-border);
	border-radius: var(--nk-card-radius);
	overflow: hidden;
	box-shadow: var(--nk-card-shadow);
	transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.nk-gallery--phone .nk-gallery__item { aspect-ratio: 3 / 4; }
.nk-gallery__item:hover {
	transform: scale(1.02);
	box-shadow: var(--nk-card-shadow-hover);
}
.nk-gallery__item img { width: 100%; height: 100%; object-fit: contain; display: block; }

/* Single portrait showcase (e.g. OneShop, no gallery folder). */
.nk-figure--portrait { max-width: 360px; margin-inline: auto; }
.nk-figure--portrait img { max-height: none; }

/* Gallery items are clickable when JS is on (lightbox); keep the cue subtle. */
.nk-js .nk-gallery__item { cursor: zoom-in; }

/* ------------------------------------------------------------------ */
/* 16. GALLERY LIGHTBOX (built by nktech.js)                           */
/* ------------------------------------------------------------------ */
.nk-lightbox[hidden] { display: none; }
.nk-lightbox {
	position: fixed;
	inset: 0;
	z-index: 1100;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: clamp(1rem, 0.5rem + 3vw, 3rem);
}
.nk-lightbox__overlay {
	position: absolute;
	inset: 0;
	background: rgba(4, 32, 58, 0.88);
	backdrop-filter: blur(3px);
}
.nk-lightbox__stage {
	position: relative;
	z-index: 1;
	margin: 0;
	max-width: min(1100px, 92vw);
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--nk-space-3);
	animation: nkModalIn 0.25s ease;
}
.nk-lightbox__img {
	max-width: 100%;
	max-height: 82vh;
	width: auto;
	height: auto;
	object-fit: contain;
	border-radius: var(--nk-radius);
	box-shadow: var(--nk-shadow-lg);
	background: #fff;
}
.nk-lightbox__cap {
	color: #cfe4f3;
	font-size: 0.9rem;
	text-align: center;
	max-width: 60ch;
}
.nk-lightbox__close,
.nk-lightbox__nav {
	position: absolute;
	z-index: 2;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	border: none;
	cursor: pointer;
	color: #fff;
	background: rgba(255, 255, 255, 0.12);
	border-radius: 999px;
	transition: background 0.18s ease, transform 0.18s ease;
}
.nk-lightbox__close:hover,
.nk-lightbox__nav:hover { background: rgba(0, 210, 255, 0.32); }
.nk-lightbox__close {
	top: clamp(0.75rem, 0.5rem + 1vw, 1.5rem);
	right: clamp(0.75rem, 0.5rem + 1vw, 1.5rem);
	width: 48px;
	height: 48px;
	font-size: 1.9rem;
	line-height: 1;
}
.nk-lightbox__nav {
	top: 50%;
	transform: translateY(-50%);
	width: 52px;
	height: 52px;
	font-size: 2rem;
	line-height: 1;
}
.nk-lightbox__nav:hover { transform: translateY(-50%) scale(1.08); }
.nk-lightbox__nav--prev { left: clamp(0.5rem, 0.25rem + 1vw, 1.5rem); }
.nk-lightbox__nav--next { right: clamp(0.5rem, 0.25rem + 1vw, 1.5rem); }

@media (prefers-reduced-motion: reduce) {
	.nk-lightbox__stage { animation: none; }
}
@media (max-width: 480px) {
	.nk-lightbox__nav { width: 42px; height: 42px; font-size: 1.6rem; }
}