/* =============================================
   HYDROSENSE — Global Styles
   ============================================= */

/* ── Dark mode (default) ────────────────────── */
:root {
  --green-deep:   #1B4332;
  --green-mid:    #2D6A4F;
  --green-lime:   #52B788;
  --green-light:  #95D5B2;
  --aqua:         #40B4C4;
  --aqua-dim:     #2A8FA0;
  --bg-dark:      #0D1F18;
  --bg-card:      #122A1F;
  --bg-card2:     #163526;
  --surface:      #1E3D2F;
  --off-white:    #F0F4EF;
  --muted:        #8BA99A;
  --danger:       #E05C5C;
  --warning:      #F4A836;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;
  --nav-h:        64px;
  --radius-sm:    6px;
  --radius-md:    12px;
  --radius-lg:    20px;
  --transition:   0.25s ease;
}

/* ── Light mode ─────────────────────────────── */
:root.light {
  --green-deep:   #1B4332;
  --green-mid:    #2D6A4F;
  --green-lime:   #2D6A4F;
  --green-light:  #52B788;
  --aqua:         #1E7A8A;
  --aqua-dim:     #155F6E;
  --bg-dark:      #F0F5F2;
  --bg-card:      #FFFFFF;
  --bg-card2:     #E8F0EB;
  --surface:      #DDE9E2;
  --off-white:    #1A2E22;
  --muted:        #4A6B58;
  --danger:       #C0392B;
  --warning:      #D4880A;
}

/* Smooth theme transition */
*, *::before, *::after {
  transition-property: background-color, border-color, color, box-shadow;
  transition-duration: 0.25s;
  transition-timing-function: ease;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg-dark);
  color: var(--off-white);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Scrollbar ─────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--green-mid); border-radius: 3px; }

/* ── Typography ────────────────────────────── */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.2; }

/* ── Navigation ────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  background: rgba(13, 31, 24, 0.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(82, 183, 136, 0.15);
  z-index: 1000;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  text-decoration: none;
}
.nav__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--off-white);
  letter-spacing: -0.02em;
}

.nav__links {
  display: flex;
  list-style: none;
  gap: 4px;
}
.nav__link {
  display: block;
  padding: 7px 18px;
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  border-radius: 99px;
  letter-spacing: 0.01em;
  transition: color var(--transition), background var(--transition);
}
.nav__link:hover,
.nav__link.active {
  color: var(--green-lime);
  background: rgba(82, 183, 136, 0.1);
}
.nav__link.active {
  color: var(--off-white);
  background: rgba(82, 183, 136, 0.18);
}

.nav__status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--muted);
  font-family: var(--font-display);
}
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--green-lime);
  box-shadow: 0 0 8px var(--green-lime);
  animation: pulse-dot 2.4s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 8px var(--green-lime); }
  50%       { opacity: 0.5; box-shadow: 0 0 3px var(--green-lime); }
}

/* ── Pages ─────────────────────────────────── */
.page {
  display: none;
  padding-top: var(--nav-h);
  min-height: 100vh;
}
.page--active { display: block; }

/* ── Shared Section Title ───────────────────── */
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green-lime);
  margin-bottom: 10px;
}
.section-eyebrow::before {
  content: '';
  display: block;
  width: 20px; height: 2px;
  background: var(--green-lime);
  border-radius: 1px;
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  color: var(--off-white);
  margin-bottom: 12px;
}
.section-sub {
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 520px;
}

/* ── Card Base ─────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid rgba(82, 183, 136, 0.12);
  border-radius: var(--radius-md);
  padding: 22px;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: linear-gradient(180deg, var(--green-lime), var(--aqua));
  border-radius: 99px 0 0 99px;
  opacity: 0;
  transition: opacity var(--transition);
}
.card:hover::before { opacity: 1; }

/* ── Button ────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  border: none;
  border-radius: 99px;
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
}
.btn--primary {
  background: var(--green-lime);
  color: var(--bg-dark);
}
.btn--primary:hover {
  background: var(--green-light);
  transform: translateY(-1px);
}
.btn--outline {
  background: transparent;
  color: var(--green-lime);
  border: 1.5px solid rgba(82, 183, 136, 0.4);
}
.btn--outline:hover {
  border-color: var(--green-lime);
  background: rgba(82, 183, 136, 0.08);
}

/* ── Grid helpers ──────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .nav { padding: 0 16px; }
  .nav__links { display: none; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ── Tag badges ────────────────────────────── */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 0.7rem;
  font-weight: 600;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.tag--green  { background: rgba(82,183,136,0.15); color: var(--green-lime); }
.tag--aqua   { background: rgba(64,180,196,0.15); color: var(--aqua); }
.tag--yellow { background: rgba(244,168,54,0.15); color: var(--warning); }
.tag--red    { background: rgba(224,92,92,0.15);  color: var(--danger); }

/* ── Utility ───────────────────────────────── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8  { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.mt-8   { margin-top: 8px; }
.mt-16  { margin-top: 16px; }
.mt-24  { margin-top: 24px; }
.mb-24  { margin-bottom: 24px; }

/* ── Divider ───────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid rgba(82, 183, 136, 0.1);
  margin: 32px 0;
}

/* ── Leaf watermark (decorative) ─────────────── */
.leaf-watermark {
  position: absolute;
  opacity: 0.04;
  pointer-events: none;
  user-select: none;
}

/* ── Theme toggle button ─────────────────────── */
.nav__right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav__theme-btn {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid rgba(82,183,136,0.2);
  background: rgba(82,183,136,0.07);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .95rem;
  transition: all .2s ease;
  flex-shrink: 0;
}
.nav__theme-btn:hover {
  background: rgba(82,183,136,0.15);
  border-color: rgba(82,183,136,0.4);
  transform: rotate(20deg);
}

/* ── Light mode overrides ───────────────────── */
:root.light body {
  background: var(--bg-dark);
  color: var(--off-white);
}
:root.light .nav {
  background: rgba(240,245,242,0.9);
  border-bottom-color: rgba(45,106,79,0.15);
}
:root.light .nav__link  { color: var(--muted); }
:root.light .nav__link:hover,
:root.light .nav__link.active { color: var(--off-white); }
:root.light .nav__title { color: var(--off-white); }
:root.light .nav__status { color: var(--muted); }
:root.light .status-label { color: var(--muted); }

:root.light .card {
  background: var(--bg-card);
  border-color: rgba(45,106,79,0.15);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
:root.light .section-eyebrow { color: var(--green-lime); }
:root.light .section-title   { color: var(--off-white); }
:root.light .section-sub     { color: var(--muted); }
:root.light .tag--green { background: rgba(45,106,79,0.1); color: var(--green-lime); }
:root.light .tag--aqua  { background: rgba(30,122,138,0.1); color: var(--aqua); }
:root.light .tag--yellow{ background: rgba(212,136,10,0.1); color: var(--warning); }
:root.light .tag--red   { background: rgba(192,57,43,0.1);  color: var(--danger); }

:root.light .adm-input,
:root.light .db-input {
  background: rgba(0,0,0,0.04);
  border-color: rgba(45,106,79,0.2);
  color: var(--off-white);
}
:root.light .adm-input:focus,
:root.light .db-input:focus { border-color: var(--green-lime); }

:root.light .adm-sidebar {
  background: var(--bg-card);
  border-right-color: rgba(45,106,79,0.12);
}
:root.light .adm-nav__item { color: var(--muted); }
:root.light .adm-nav__item.active { background: rgba(45,106,79,0.1); color: var(--green-lime); }

:root.light .db-metrics-table td,
:root.light .db-metrics-table th { color: var(--off-white); }
:root.light .db-metrics-table tr:hover td { background: rgba(45,106,79,0.04); }

:root.light .gl-card,
:root.light .gl-cv-card { background: var(--bg-card); }

:root.light .lp-hero    { background: var(--bg-dark); }
:root.light .lp-section--dark { background: var(--bg-card); }
:root.light .lp-impact-card   { background: var(--bg-card); }
:root.light .lp-team-card,
:root.light .lp-creator-bio   { background: var(--bg-card); }
:root.light .lp-footer  { border-top-color: rgba(45,106,79,0.12); }
:root.light .lp-footer__copy  { color: var(--muted); }

:root.light ::-webkit-scrollbar-track { background: var(--bg-dark); }
:root.light ::-webkit-scrollbar-thumb { background: rgba(45,106,79,0.3); }

/* ── Light mode — Landing hero fixes ───────── */
:root.light .lp-hero {
  background: linear-gradient(135deg, #0D2B1E 0%, #1B4332 50%, #0A2A1A 100%);
}
:root.light .lp-hero__title      { color: #F0F4EF; }
:root.light .lp-hero__sub        { color: rgba(240,244,239,0.75); }
:root.light .lp-rotating-prefix  { color: #52B788; }
:root.light .lp-rotating-text    { color: #40B4C4; }
:root.light .lp-stat__val        { color: #52B788; }
:root.light .lp-stat__lbl        { color: rgba(240,244,239,0.6); }
:root.light .lp-stat__sep        { background: rgba(240,244,239,0.2); }
:root.light .section-eyebrow     { color: #52B788; }

/* Nav in light mode stays readable */
:root.light .nav {
  background: rgba(255,255,255,0.92);
  border-bottom-color: rgba(45,106,79,0.15);
}
:root.light .nav__title  { color: #1A2E22; }
:root.light .nav__link   { color: #4A6B58; }
:root.light .nav__link:hover,
:root.light .nav__link.active { color: #1A2E22; background: rgba(45,106,79,0.08); }
:root.light .nav__link--admin  { color: #1E7A8A; border-color: rgba(30,122,138,0.25); }
:root.light .status-label { color: #4A6B58; }

/* Wave colors adapt */
:root.light .lp-wave svg path { fill: #F0F5F2; }
:root.light .lp-section--dark  { background: #E4EDE7; }
:root.light .lp-flow__step     { background: #F0F5F2; border-color: rgba(45,106,79,0.15); }
:root.light .lp-flow__title    { color: #1A2E22; }
:root.light .lp-flow__desc     { color: #4A6B58; }
:root.light .lp-flow__arrow    { color: rgba(45,106,79,0.4); }
:root.light .lp-impact-card    { background: #F0F5F2; border-color: rgba(45,106,79,0.12); }
:root.light .lp-impact-val     { color: #2D6A4F; }
:root.light .lp-impact-label   { color: #1A2E22; }
:root.light .lp-impact-desc    { color: #4A6B58; }
:root.light .lp-tech-card      { background: #F0F5F2; border-color: rgba(45,106,79,0.12); }
:root.light .lp-tech-card__name{ color: #1A2E22; }
:root.light .lp-tech-card__desc{ color: #4A6B58; }
:root.light .lp-team-card      { background: #F0F5F2; border-color: rgba(45,106,79,0.12); }
:root.light .lp-team-info strong { color: #1A2E22; }
:root.light .lp-team-info span   { color: #4A6B58; }
:root.light .lp-creator-bio    { background: #F0F5F2; border-color: rgba(45,106,79,0.12); }
:root.light .lp-creator__bio   { color: #4A6B58; }
:root.light .lp-creator-bio__title { color: #4A6B58; }
:root.light .lp-creator__name  { color: #1A2E22; }
:root.light .lp-creator__role  { color: #1E7A8A; }
:root.light .lp-upn-logo       { border-color: rgba(45,106,79,0.2); }
:root.light .lp-footer         { border-top-color: rgba(45,106,79,0.15); background: #E4EDE7; }
:root.light .lp-footer__copy   { color: #4A6B58; }

/* Arch diagram bg */
:root.light .lp-arch-canvas {
  background: rgba(13,43,30,0.85);
  border-color: rgba(45,106,79,0.2);
}

/* Carousel cards */
:root.light .lp-carousel-card  { background: #F0F5F2; border-color: rgba(45,106,79,0.15); }

/* Particles visibility on light */
:root.light #lp-particles { opacity: 0.6; }

/* ── Hamburger button ────────────────────────── */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px; height: 36px;
  padding: 6px;
  background: none;
  border: 1px solid rgba(82,183,136,0.2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  z-index: 1001;
  flex-shrink: 0;
}
.nav__hamburger span {
  display: block;
  width: 100%; height: 2px;
  background: var(--green-lime);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}
.nav__hamburger--open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger--open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav__hamburger--open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile menu panel ──────────────────────── */
.nav__mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0; bottom: 0;
  background: rgba(10,25,18,0.98);
  backdrop-filter: blur(16px);
  flex-direction: column;
  padding: 32px 24px;
  gap: 8px;
  z-index: 999;
  transform: translateX(100%);
  transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
}
.nav__mobile-menu--open {
  transform: translateX(0);
}
.nav__mobile-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(82,183,136,0.08);
  background: rgba(255,255,255,0.03);
  color: var(--muted);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  letter-spacing: 0.01em;
}
.nav__mobile-link:hover,
.nav__mobile-link.active {
  background: rgba(82,183,136,0.1);
  border-color: rgba(82,183,136,0.25);
  color: var(--off-white);
}
.nav__mobile-link--admin {
  color: var(--aqua);
  border-color: rgba(64,180,196,0.15);
  margin-top: 12px;
}
.nav__mobile-link--admin:hover,
.nav__mobile-link--admin.active {
  background: rgba(64,180,196,0.1);
  border-color: rgba(64,180,196,0.3);
}

/* ── Show hamburger on mobile ───────────────── */
@media (max-width: 768px) {
  .nav__links      { display: none !important; }
  .nav__hamburger  { display: flex; }
  .nav__mobile-menu{ display: flex; }
  .nav__status .status-label { display: none; }
  .nav { padding: 0 16px; }
}

/* ── Mobile responsive fixes ────────────────── */

/* Dashboard */
@media (max-width: 600px) {
  .db-wrapper      { padding: 16px 12px 60px; gap: 16px; }
  .db-kpi-grid     { grid-template-columns: 1fr 1fr; gap: 10px; }
  .db-kpi-bigval   { font-size: 1.5rem; }
  .db-charts-grid  { grid-template-columns: 1fr; }
  .db-panel        { padding: 16px; }
  .db-metrics-card { padding: 16px; }
  .db-log-card     { padding: 16px; }
  .db-header       { flex-direction: column; gap: 8px; }
  .db-panel-row    { grid-template-columns: 1fr; }
}

/* Stats */
@media (max-width: 600px) {
  .st-wrapper      { padding: 16px 12px 60px; gap: 16px; }
  .st-kpi-grid     { grid-template-columns: 1fr 1fr; gap: 10px; }
  .st-kpi-value    { font-size: 1.4rem; }
  .st-charts-row   { grid-template-columns: 1fr; }
  .st-header       { flex-direction: column; gap: 10px; }
  .st-header-right { align-items: flex-start; }
  .st-period-bar   { flex-wrap: wrap; border-radius: var(--radius-md); }
  .st-canvas       { height: 180px; }
}

/* Gallery */
@media (max-width: 600px) {
  .gl-wrapper      { padding: 16px 12px 60px; gap: 16px; }
  .gl-lb__box      { max-height: 96vh; }
  .gl-lb__comparator { min-height: 280px; }
  .gl-lb__filters  { gap: 4px; padding: 8px 10px; }
  .gl-filter-btn   { padding: 4px 10px; font-size: .68rem; }
}

/* Admin */
@media (max-width: 600px) {
  .adm-layout      { grid-template-columns: 1fr; }
  .adm-sidebar     { height: auto; position: static; padding: 16px 12px; }
  .adm-nav         { flex-direction: row; flex-wrap: wrap; gap: 4px; }
  .adm-nav__item   { padding: 6px 10px; font-size: .74rem; }
  .adm-main        { padding: 16px 12px 48px; }
  .adm-form-grid   { grid-template-columns: 1fr; }
  .adm-cmd-grid    { grid-template-columns: 1fr 1fr; }
  .adm-pump-sched-card { flex-direction: column; }
  .adm-pump-days   { flex-wrap: wrap; }
  .adm-login-card  { margin: 0 8px; }
  .adm-login-form, .adm-login-btn, .adm-login-note,
  .adm-login-error { padding-left: 20px; padding-right: 20px; }
  .adm-login-header{ padding: 20px; }
  .adm-sysinfo-grid{ grid-template-columns: 1fr; }
  .adm-role-grid   { grid-template-columns: 1fr; }
}

/* Landing mobile extras */
@media (max-width: 480px) {
  .lp-hero         { padding: 40px 20px 60px; }
  .lp-hero__stats  { gap: 16px; }
  .lp-stat__val    { font-size: 1.2rem; }
  .lp-impact-grid  { grid-template-columns: 1fr 1fr; gap: 10px; }
  .lp-impact-val   { font-size: 1.8rem; }
  .lp-tech-grid    { grid-template-columns: 1fr; }
  .lp-flow         { gap: 10px; }
  .lp-arch-canvas  { height: 220px; }
  .lp-creator-bio__grid { grid-template-columns: 1fr; }
  .lp-section__inner { padding: 0 16px; }
  .lp-footer__inner  { padding: 0 16px; flex-direction: column; text-align: center; }
}

/* Light mode mobile menu */
:root.light .nav__mobile-menu {
  background: rgba(240,245,242,0.98);
}
:root.light .nav__mobile-link {
  color: var(--muted);
  border-color: rgba(45,106,79,0.1);
  background: rgba(45,106,79,0.03);
}
:root.light .nav__mobile-link:hover,
:root.light .nav__mobile-link.active {
  background: rgba(45,106,79,0.08);
  color: var(--off-white);
}
:root.light .nav__hamburger span { background: var(--green-lime); }