/* ═══════════════════════════════════════════════════════
   STUDIO — 1978.IO Digital Studio
   Clean modern light aesthetic for business clients
═══════════════════════════════════════════════════════ */

:root {
  --bg:          #ffffff;
  --bg-soft:     #f4f6f9;
  --bg-card:     #ffffff;
  --border:      #e5e7eb;
  --border-mid:  #d1d5db;
  --text:        #0f1117;
  --text-dim:    #6b7280;
  --text-light:  #9ca3af;
  --accent:      #0057ff;
  --accent-hov:  #0046d4;
  --accent-bg:   rgba(0, 87, 255, 0.06);
  --teal:        #00b896;
  --teal-bg:     rgba(0, 184, 150, 0.06);
  --green-stat:  #059669;
  --red:         #ef4444;
  --amber:       #d97706;
  --shadow-sm:   0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:   0 4px 20px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg:   0 12px 40px rgba(0,0,0,0.09), 0 4px 12px rgba(0,0,0,0.05);
  --radius:      12px;
  --radius-sm:   8px;
  --radius-xs:   5px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.65;
}
a { color: var(--accent); text-decoration: none; }

/* ─── Layout ──────────────────────────────────────────── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 32px; }
.section    { padding: 80px 0; }

/* ─── Header ──────────────────────────────────────────── */
#header {
  position: sticky; top: 0; z-index: 200;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
#header-inner {
  max-width: 1100px; margin: 0 auto; padding: 0 32px;
  height: 62px; display: flex; align-items: center; justify-content: space-between;
}
#logo { font-size: 15px; font-weight: 700; color: var(--text); letter-spacing: -0.3px; }
#logo span { color: var(--accent); }
#nav { display: flex; align-items: center; gap: 28px; }
#nav a { font-size: 14px; font-weight: 500; color: var(--text-dim); transition: color 0.15s; }
#nav a:hover, #nav a.active { color: var(--accent); }
#nav .nav-cta {
  padding: 8px 18px; border-radius: var(--radius-sm);
  background: var(--accent); color: #fff !important;
  font-size: 13px; font-weight: 600; transition: background 0.15s;
}
#nav .nav-cta:hover { background: var(--accent-hov); }

/* ─── Fade animation ──────────────────────────────────── */
.fade { opacity: 0; transform: translateY(16px); transition: opacity 0.55s ease, transform 0.55s ease; }
.fade.visible { opacity: 1; transform: none; }
.fade-d1 { transition-delay: 0.08s; }
.fade-d2 { transition-delay: 0.16s; }
.fade-d3 { transition-delay: 0.24s; }

/* ─── Buttons ─────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 11px 22px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600; cursor: pointer;
  text-decoration: none; border: none; transition: all 0.15s; white-space: nowrap;
  font-family: inherit;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hov); box-shadow: 0 4px 14px rgba(0,87,255,0.28); }
.btn-ghost { background: transparent; color: var(--text); border: 1.5px solid var(--border-mid); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ─── Labels & headings ───────────────────────────────── */
.label { font-size: 12px; font-weight: 600; color: var(--accent); letter-spacing: 0.09em; text-transform: uppercase; }
.section-title { font-size: clamp(26px, 3.5vw, 38px); font-weight: 700; letter-spacing: -0.7px; line-height: 1.15; margin: 12px 0; }
.section-sub { font-size: 16px; color: var(--text-dim); max-width: 520px; }

/* ─── HERO ────────────────────────────────────────────── */
#hero { padding: 100px 0 88px; }
.hero-inner { max-width: 700px; }
.hero-title {
  font-size: clamp(40px, 5.5vw, 64px);
  font-weight: 800; letter-spacing: -2px; line-height: 1.08;
  margin-bottom: 22px;
}
.hero-title em { font-style: normal; color: var(--accent); }
.hero-sub { font-size: 18px; color: var(--text-dim); line-height: 1.65; margin-bottom: 36px; max-width: 520px; }
.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }

/* ─── SERVICES ────────────────────────────────────────── */
#services { background: var(--bg-soft); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.service-card {
  padding: 28px; border-radius: var(--radius);
  background: var(--bg-card); border: 1px solid var(--border);
  transition: all 0.2s;
}
.service-card:hover { border-color: var(--accent); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.service-icon { font-size: 28px; margin-bottom: 16px; line-height: 1; }
.service-title { font-size: 16px; font-weight: 700; margin-bottom: 10px; }
.service-desc { font-size: 14px; color: var(--text-dim); line-height: 1.65; }
.service-tags { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 6px; }
.service-tag { font-size: 11px; font-weight: 500; color: var(--accent); background: var(--accent-bg); padding: 3px 9px; border-radius: 20px; }

/* ─── DEMO SECTION ────────────────────────────────────── */
#demo { padding: 88px 0; background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.demo-window {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-lg);
  overflow: hidden; margin-top: 48px;
}
.demo-titlebar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; background: var(--bg-soft); border-bottom: 1px solid var(--border);
}
.demo-dots { display: flex; gap: 6px; }
.demo-dots span { width: 11px; height: 11px; border-radius: 50%; }
.demo-dots span:nth-child(1) { background: #ff5f57; }
.demo-dots span:nth-child(2) { background: #ffbc2e; }
.demo-dots span:nth-child(3) { background: #2bc640; }
.demo-title { font-size: 12px; font-weight: 600; color: var(--text-dim); }
.demo-badge { font-size: 10px; font-weight: 600; color: var(--text-light); background: var(--border); padding: 2px 8px; border-radius: 20px; letter-spacing: 0.06em; }
.demo-body { padding: 24px; display: flex; flex-direction: column; gap: 20px; }

/* KPI cards */
.kpi-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.kpi-card { padding: 18px 20px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--bg); }
.kpi-label { font-size: 11px; font-weight: 600; color: var(--text-light); text-transform: uppercase; letter-spacing: 0.07em; margin-bottom: 8px; }
.kpi-value { font-size: 28px; font-weight: 700; letter-spacing: -0.8px; line-height: 1; margin-bottom: 8px; font-variant-numeric: tabular-nums; }
.kpi-delta { font-size: 12px; font-weight: 600; }
.kpi-delta.pos { color: var(--green-stat); }
.kpi-delta.neg { color: var(--red); }

/* Charts row */
.charts-row { display: grid; grid-template-columns: 1.6fr 1fr; gap: 14px; }
.chart-card { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 18px 20px; background: var(--bg); }
.chart-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.chart-title { font-size: 13px; font-weight: 600; color: var(--text); }
.chart-meta { font-size: 11px; color: var(--text-light); }
canvas { display: block; width: 100% !important; }
#line-chart { height: 180px; cursor: crosshair; }
#bar-chart  { height: 180px; cursor: default; }

/* Data table */
.table-card { border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; background: var(--bg); }
.table-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid var(--border); gap: 12px;
  background: var(--bg-soft);
}
.table-search {
  flex: 1; max-width: 260px; padding: 7px 12px;
  border: 1px solid var(--border); border-radius: var(--radius-xs);
  font-size: 13px; font-family: inherit; color: var(--text);
  background: var(--bg); outline: none; transition: border-color 0.15s;
}
.table-search:focus { border-color: var(--accent); }
.table-search::placeholder { color: var(--text-light); }
.table-count { font-size: 12px; color: var(--text-light); white-space: nowrap; }
#proj-table { width: 100%; border-collapse: collapse; font-size: 13px; }
#proj-table th {
  padding: 10px 14px; text-align: left;
  font-size: 11px; font-weight: 600; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.07em;
  border-bottom: 1px solid var(--border); background: var(--bg-soft);
  cursor: pointer; user-select: none; white-space: nowrap;
  transition: color 0.15s;
}
#proj-table th:hover { color: var(--accent); }
#proj-table th .sort-icon { display: inline-block; margin-left: 4px; font-size: 10px; opacity: 0.35; }
#proj-table th.sort-asc  .sort-icon { opacity: 1; color: var(--accent); }
#proj-table th.sort-asc  .sort-icon::after { content: '↑'; }
#proj-table th.sort-desc .sort-icon { opacity: 1; color: var(--accent); }
#proj-table th.sort-desc .sort-icon::after { content: '↓'; }
#proj-table th:not(.sort-asc):not(.sort-desc) .sort-icon::after { content: '↕'; }
#proj-table td { padding: 12px 14px; border-bottom: 1px solid var(--border); color: var(--text); }
#proj-table tr:last-child td { border-bottom: none; }
#proj-table tbody tr:hover td { background: var(--bg-soft); }
.status-badge { display: inline-block; padding: 2px 9px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.status-live      { background: rgba(5,150,105,0.09);  color: var(--green-stat); }
.status-active    { background: var(--accent-bg);        color: var(--accent); }
.status-discovery { background: rgba(217,119,6,0.09);  color: var(--amber); }

/* ─── CTA ─────────────────────────────────────────────── */
#cta { text-align: center; }
.cta-inner { max-width: 540px; margin: 0 auto; }
.cta-title { font-size: clamp(28px, 3.5vw, 42px); font-weight: 700; letter-spacing: -0.8px; margin-bottom: 16px; }
.cta-sub { color: var(--text-dim); font-size: 16px; margin-bottom: 32px; }
.cta-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ─── FOOTER ──────────────────────────────────────────── */
#footer { border-top: 1px solid var(--border); padding: 28px 0; }
#footer-inner {
  max-width: 1100px; margin: 0 auto; padding: 0 32px;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
.footer-copy { font-size: 13px; color: var(--text-dim); }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-size: 13px; color: var(--text-dim); transition: color 0.15s; }
.footer-links a:hover { color: var(--accent); }

/* ─── PAGE HERO (inner pages) ─────────────────────────── */
.page-hero { padding: 72px 0 56px; border-bottom: 1px solid var(--border); }
.page-hero-eyebrow { font-size: 12px; font-weight: 600; color: var(--accent); letter-spacing: 0.09em; text-transform: uppercase; margin-bottom: 12px; }
.page-hero-title { font-size: clamp(32px, 4vw, 52px); font-weight: 800; letter-spacing: -1.5px; }
.page-hero-sub { font-size: 17px; color: var(--text-dim); margin-top: 14px; max-width: 500px; }

/* ─── ABOUT PAGE ──────────────────────────────────────── */
.about-intro { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: start; padding: 72px 0 56px; }
.about-bio { font-size: 16px; color: var(--text-dim); line-height: 1.75; }
.about-bio p + p { margin-top: 16px; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.astat { display: flex; flex-direction: column; gap: 4px; padding: 22px; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.astat-num { font-size: 36px; font-weight: 800; letter-spacing: -1.5px; color: var(--accent); }
.astat-label { font-size: 13px; color: var(--text-dim); }

.skills-section { padding: 56px 0; border-top: 1px solid var(--border); }
.skills-groups { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-top: 36px; }
.sg-title { font-size: 12px; font-weight: 600; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 14px; }
.sg-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-tag { font-size: 13px; font-weight: 500; padding: 5px 12px; border-radius: 20px; background: var(--bg-soft); border: 1px solid var(--border); color: var(--text); }

.process-section { padding: 56px 0; border-top: 1px solid var(--border); }
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 36px; }
.proc-step { display: flex; flex-direction: column; gap: 12px; }
.proc-num {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--accent-bg); border: 1.5px solid var(--accent);
  color: var(--accent); font-size: 14px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.proc-title { font-size: 15px; font-weight: 700; }
.proc-desc { font-size: 14px; color: var(--text-dim); line-height: 1.6; }

/* ─── PORTFOLIO PAGE ──────────────────────────────────── */
.portfolio-section { padding: 64px 0; }
.portfolio-grid { display: flex; flex-direction: column; gap: 24px; margin-top: 48px; }
.project-card {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 36px; background: var(--bg-card); transition: all 0.2s;
}
.project-card:hover { border-color: var(--accent); box-shadow: var(--shadow-md); }
.pc-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.pc-title { font-size: 20px; font-weight: 700; letter-spacing: -0.3px; }
.pc-year { font-size: 13px; color: var(--text-light); padding-top: 4px; white-space: nowrap; }
.pc-desc { font-size: 15px; color: var(--text-dim); line-height: 1.7; margin-bottom: 20px; }
.pc-stack { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.pc-tag { font-size: 12px; font-weight: 500; padding: 4px 10px; border-radius: 20px; background: var(--accent-bg); color: var(--accent); }
.pc-footer { display: flex; align-items: center; justify-content: space-between; padding-top: 20px; border-top: 1px solid var(--border); gap: 16px; flex-wrap: wrap; }
.pc-outcomes { display: flex; gap: 24px; flex-wrap: wrap; }
.pc-outcome { font-size: 13px; color: var(--text-dim); }
.pc-outcome strong { color: var(--text); font-weight: 600; }

.wip-card {
  border: 1.5px dashed var(--border-mid); border-radius: var(--radius);
  padding: 36px; text-align: center; color: var(--text-dim);
}
.wip-card strong { font-size: 15px; font-weight: 600; color: var(--text); }
.wip-card p { margin-top: 8px; font-size: 14px; }

/* ─── CONTACT PAGE ────────────────────────────────────── */
.contact-layout { display: grid; grid-template-columns: 1fr 1.5fr; gap: 72px; align-items: start; padding: 64px 0; }
.contact-channels { display: flex; flex-direction: column; gap: 28px; }
.ch-label { font-size: 11px; font-weight: 600; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 4px; }
.ch-value { font-size: 15px; font-weight: 500; }
.ch-value a { color: var(--text); transition: color 0.15s; }
.ch-value a:hover { color: var(--accent); }

.cf-form { display: flex; flex-direction: column; gap: 20px; }
.cf-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.cf-field { display: flex; flex-direction: column; gap: 6px; }
.cf-label { font-size: 11px; font-weight: 600; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.07em; }
.cf-input, .cf-textarea {
  padding: 10px 14px; border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  font-size: 14px; font-family: inherit; color: var(--text);
  background: var(--bg); outline: none; transition: border-color 0.15s;
}
.cf-input:focus, .cf-textarea:focus { border-color: var(--accent); }
.cf-textarea { min-height: 120px; resize: vertical; }
.cf-status { font-size: 13px; min-height: 20px; }
.cf-status.error { color: var(--red); }
.cf-status.ok { color: var(--green-stat); }
.cf-success { padding: 24px; background: rgba(5,150,105,0.06); border: 1px solid rgba(5,150,105,0.2); border-radius: var(--radius-sm); }
.cf-success strong { font-size: 15px; }
.cf-success p { margin-top: 6px; font-size: 14px; color: var(--text-dim); }

/* ─── RESPONSIVE ──────────────────────────────────────── */
@media (max-width: 960px) {
  .services-grid    { grid-template-columns: 1fr 1fr; }
  .charts-row       { grid-template-columns: 1fr; }
  .kpi-row          { grid-template-columns: repeat(2, 1fr); }
  .about-intro      { grid-template-columns: 1fr; gap: 40px; }
  .skills-groups    { grid-template-columns: 1fr 1fr; }
  .process-steps    { grid-template-columns: repeat(2, 1fr); }
  .contact-layout   { grid-template-columns: 1fr; gap: 40px; }
}
/* ─── DARK THEME ──────────────────────────────────────── */
[data-theme="dark"] {
  --bg:         #0d1117;
  --bg-soft:    #161c26;
  --bg-card:    #161c26;
  --border:     #21293a;
  --border-mid: #2a3549;
  --text:       #e2e8f0;
  --text-dim:   #8899aa;
  --text-light: #5a6a7e;
}
[data-theme="dark"] #header {
  background: rgba(13, 17, 23, 0.92);
}
[data-theme="dark"] .table-search {
  background: var(--bg);
  color: var(--text);
}
[data-theme="dark"] .astat {
  background: var(--bg-soft);
}
[data-theme="dark"] .kpi-card {
  background: var(--bg-soft);
}
[data-theme="dark"] .chart-card {
  background: var(--bg-soft);
}

/* ─── THEME TOGGLE BUTTON ─────────────────────────────── */
#theme-toggle {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border-mid);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
  flex-shrink: 0;
  padding: 0;
  font-family: inherit;
  line-height: 1;
}
#theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-bg);
}

@media (max-width: 640px) {
  .container        { padding: 0 20px; }
  .section          { padding: 60px 0; }
  #header-inner     { padding: 0 20px; }
  #footer-inner     { padding: 0 20px; }
  #nav .nav-cta     { display: none; }
  #nav              { gap: 18px; }
  #hero             { padding: 64px 0 52px; }
  .hero-title       { letter-spacing: -1.2px; }
  .services-grid    { grid-template-columns: 1fr; }
  .kpi-row          { grid-template-columns: 1fr 1fr; }
  .skills-groups    { grid-template-columns: 1fr; }
  .process-steps    { grid-template-columns: 1fr; }
  .cf-row           { grid-template-columns: 1fr; }
  .demo-body        { padding: 16px; }
  .pc-header        { flex-direction: column; gap: 4px; }
  .pc-footer        { flex-direction: column; align-items: flex-start; }
  .about-stats      { grid-template-columns: 1fr 1fr; gap: 14px; }
}