/* ═══════════════════════════════════════════════
   CALCPRO — MAIN STYLESHEET
   Shared across all pages
═══════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=DM+Mono:wght@400;500&display=swap');

/* ── CSS CUSTOM PROPERTIES ── */
:root {
  --font-sans: 'DM Sans', sans-serif;
  --font-mono: 'DM Mono', monospace;

  /* Brand */
  --accent:        #2563EB;
  --accent-light:  rgba(37,99,235,0.12);
  --accent-dark:   #1D4ED8;
  --accent-glow:   rgba(37,99,235,0.2);

  --green:         #22C55E;
  --green-light:   rgba(34,197,94,0.1);
  --red:           #EF4444;
  --red-light:     rgba(239,68,68,0.1);
  --amber:         #F59E0B;
  --amber-light:   rgba(245,158,11,0.1);

  /* Neutrals — Dark Navy */
  --bg:            #080E1A;
  --surface:       rgba(15, 23, 42, 0.6);
  --surface-2:     rgba(20, 30, 52, 0.5);
  --surface-3:     rgba(30, 41, 59, 0.4);
  --border:        rgba(255,255,255,0.06);
  --border-strong: rgba(255,255,255,0.12);

  --text-primary:  #E2E8F0;
  --text-secondary:#94A3B8;
  --text-tertiary: #64748B;
  --text-inverse:  #0F172A;

  /* Sidebar */
  --sidebar-w:     240px;
  --sidebar-bg:    rgba(8, 12, 24, 0.85);
  --sidebar-text:  #94A3B8;
  --sidebar-active:#FFFFFF;
  --sidebar-hover: rgba(255,255,255,0.06);

  /* Right panel */
  --panel-w:       260px;

  /* Spacing */
  --r-sm:  6px;
  --r-md:  10px;
  --r-lg:  14px;
  --r-xl:  20px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4), 0 2px 4px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5), 0 4px 8px rgba(0,0,0,0.3);

  /* Glass */
  --glass-bg:      rgba(15, 23, 42, 0.5);
  --glass-border:  rgba(255,255,255,0.06);
  --glass-blur:    16px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur: 200ms;
}

/* ── RESET & BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { 
  font-size: 16px; 
  scroll-behavior: smooth; 
  background-color: var(--bg);
  background-image: linear-gradient(to right, var(--sidebar-bg) var(--sidebar-w), transparent var(--sidebar-w));
}

body {
  font-family: var(--font-sans);
  background: transparent;
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: none; opacity: 0.85; }
button { cursor: pointer; font-family: var(--font-sans); }
input, select { font-family: var(--font-sans); }

/* ── LAYOUT WRAPPER ── */
.app-wrapper {
  display: flex;
  min-height: 100vh;
}

/* ── SIDEBAR ── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid rgba(255,255,255,0.04);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  overflow-y: auto;
  overflow-x: hidden;
  transition: transform var(--dur) var(--ease), width var(--dur) var(--ease);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 24px 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  text-decoration: none;
}

.sidebar-logo-icon {
  width: 36px; height: 36px;
  background: var(--accent);
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.sidebar-logo-icon svg { color: #fff; }

.sidebar-logo-text {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.3px;
}

.sidebar-logo-text span {
  color: var(--accent);
}

.sidebar-section {
  padding: 16px 12px 8px;
}

.sidebar-section-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-tertiary);
  padding: 0 8px;
  margin-bottom: 4px;
}

.sidebar-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--r-md);
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.sidebar-nav a:hover {
  background: var(--sidebar-hover);
  color: #fff;
}

.sidebar-nav a.active {
  background: var(--accent);
  color: #fff;
}

.sidebar-nav a svg {
  width: 18px; height: 18px;
  opacity: 0.7;
  flex-shrink: 0;
}

.sidebar-nav a.active svg,
.sidebar-nav a:hover svg {
  opacity: 1;
}

.sidebar-nav .nav-badge {
  margin-left: auto;
  font-size: 10px;
  font-weight: 600;
  background: var(--accent-glow);
  color: var(--accent);
  padding: 2px 7px;
  border-radius: 20px;
}

.sidebar-nav a.active .nav-badge {
  background: rgba(255,255,255,0.2);
  color: #fff;
}

.sidebar-footer {
  margin-top: auto;
  padding: 16px 12px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-footer p {
  font-size: 11px;
  color: var(--text-tertiary);
  line-height: 1.5;
}

/* ── MOBILE OVERLAY ── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 99;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

/* ── MAIN CONTENT ── */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── TOP HEADER BAR ── */
.topbar {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  border-radius: var(--r-md);
  color: var(--text-secondary);
  transition: background var(--dur) var(--ease);
}

.menu-toggle:hover { background: rgba(255,255,255,0.06); }

.topbar-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.topbar-desc {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-left: 2px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.topbar-badge {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  background: var(--accent-light);
  color: var(--accent);
  white-space: nowrap;
  border: 1px solid rgba(37,99,235,0.2);
}

/* ── PAGE BODY ── */
.page-body {
  display: flex;
  flex: 1;
  gap: 0;
}

.content-area {
  flex: 1;
  padding: 28px;
  min-width: 0;
}

/* ── RIGHT INFO PANEL ── */
.right-panel {
  width: var(--panel-w);
  flex-shrink: 0;
  border-left: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.panel-card {
  background: rgba(20, 30, 52, 0.4);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  padding: 16px;
}

.panel-card h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.panel-card h4 svg {
  width: 15px; height: 15px;
  color: var(--accent);
}

.panel-card p,
.panel-card li {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.panel-card ul {
  padding-left: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.panel-tip {
  background: rgba(37,99,235,0.08);
  border: 1px solid rgba(37,99,235,0.15);
  border-radius: var(--r-lg);
  padding: 14px 16px;
}

.panel-tip h4 { color: #60A5FA; }
.panel-tip p  { color: #93C5FD; }

/* ── FOOTER ── */
.site-footer {
  background: rgba(6, 10, 18, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255,255,255,0.04);
  color: var(--sidebar-text);
  padding: 32px 28px;
  margin-left: 0;
}

.footer-inner {
  max-width: 900px;
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  justify-content: space-between;
  align-items: flex-start;
}

.footer-brand .logo-text {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.footer-brand .logo-text span { color: var(--accent); }

.footer-brand p {
  font-size: 12.5px;
  color: var(--text-tertiary);
  max-width: 220px;
  line-height: 1.6;
}

.footer-links h5 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: 10px;
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-links a {
  font-size: 13px;
  color: var(--sidebar-text);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.footer-links a:hover { color: #fff; }

.footer-bottom {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p { font-size: 12px; color: var(--text-tertiary); }

/* ── SHARED CARD ── */
.card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.card-header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-header h2 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-header h2 svg {
  width: 20px; height: 20px;
  color: var(--accent);
}

.card-body { padding: 24px; }

/* ── FORM ELEMENTS ── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-control {
  height: 42px;
  padding: 0 14px;
  border: 1.5px solid var(--border-strong);
  border-radius: var(--r-md);
  background: rgba(15, 23, 42, 0.6);
  color: var(--text-primary);
  font-size: 15px;
  font-family: var(--font-sans);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  width: 100%;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-control-prefix {
  display: flex;
  align-items: center;
  border: 1.5px solid var(--border-strong);
  border-radius: var(--r-md);
  overflow: hidden;
  background: rgba(15, 23, 42, 0.6);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.form-control-prefix:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.prefix-symbol {
  padding: 0 12px;
  background: rgba(30, 41, 59, 0.5);
  border-right: 1.5px solid var(--border-strong);
  height: 42px;
  display: flex;
  align-items: center;
  font-size: 14px;
  color: var(--text-tertiary);
  font-weight: 600;
  flex-shrink: 0;
}

.form-control-prefix input {
  flex: 1;
  height: 42px;
  border: none;
  background: transparent;
  padding: 0 12px;
  font-size: 15px;
  color: var(--text-primary);
  font-family: var(--font-sans);
}

.form-control-prefix input:focus { outline: none; }

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.input-group {
  display: flex;
  gap: 8px;
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  height: 42px;
  padding: 0 20px;
  border-radius: var(--r-md);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-sans);
  border: 1.5px solid transparent;
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
  flex-shrink: 0;
}

.btn svg { width: 16px; height: 16px; }

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(15, 23, 42, 0.6);
  color: var(--text-secondary);
  border-color: var(--border-strong);
}

.btn-secondary:hover {
  background: rgba(30, 41, 59, 0.6);
  border-color: rgba(255,255,255,0.15);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
  padding: 0 12px;
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
}

.btn-sm {
  height: 34px;
  padding: 0 14px;
  font-size: 13px;
}

.btn-lg {
  height: 50px;
  padding: 0 28px;
  font-size: 15px;
}

/* ── RESULTS TABLE ── */
.result-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.result-table th {
  background: var(--surface-2);
  padding: 10px 14px;
  text-align: left;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-tertiary);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}

.result-table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
}

.result-table tr:last-child td { border-bottom: none; }

.result-table tr:hover td { background: rgba(37,99,235,0.06); }

.result-table .highlight-row td {
  background: var(--accent-light);
  font-weight: 700;
  color: var(--accent-dark);
}

.result-table .val {
  font-family: var(--font-mono);
  font-size: 13.5px;
  text-align: right;
}

/* ── STAT CARD ── */
.stat-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.stat-card {
  flex: 1;
  min-width: 140px;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  padding: 16px 18px;
}

.stat-card .stat-label {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin-bottom: 6px;
}

.stat-card .stat-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
  letter-spacing: -0.5px;
}

.stat-card.accent .stat-value { color: var(--accent); }
.stat-card.green .stat-value  { color: var(--green); }
.stat-card.red .stat-value    { color: var(--red); }

/* ── TABS ── */
.tabs {
  display: flex;
  gap: 2px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  padding: 4px;
  margin-bottom: 24px;
}

.tab-btn {
  flex: 1;
  height: 38px;
  border: none;
  background: transparent;
  border-radius: var(--r-md);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}

.tab-btn:hover { color: var(--text-primary); }

.tab-btn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37,99,235,0.3);
}

/* ── DIVIDER ── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}

/* ── COLLAPSE SECTION ── */
.collapse-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  padding: 14px 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  cursor: pointer;
  gap: 8px;
}

.collapse-toggle svg {
  width: 18px; height: 18px;
  transition: transform var(--dur) var(--ease);
}

.collapse-toggle.open svg { transform: rotate(180deg); }

.collapse-body {
  display: none;
  overflow: hidden;
}

.collapse-body.open { display: block; }

/* ── PAGE HEADER ── */
.page-header {
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.page-header p {
  font-size: 14.5px;
  color: var(--text-secondary);
  max-width: 620px;
  line-height: 1.6;
}

/* ── UTILITY ── */
.text-mono { font-family: var(--font-mono); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.text-green  { color: var(--green); }
.text-red    { color: var(--red); }
.text-muted  { color: var(--text-tertiary); }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }
.mt-8  { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-20 { margin-top: 20px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.mb-20 { margin-bottom: 20px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.gap-8  { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.flex-1 { flex: 1; }
.w-100  { width: 100%; }

/* ── ANIMATIONS ── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.animate-in { animation: fadeInUp 0.3s var(--ease) forwards; }

/* ════════════════════════════════
   RESPONSIVE BREAKPOINTS
════════════════════════════════ */

/* ── Large Tablet / Small Desktop (≤1100px) ── */
@media (max-width: 1100px) {
  :root { --panel-w: 220px; }
}

/* ── Tablet (≤900px): hide right panel ── */
@media (max-width: 900px) {
  .right-panel { display: none; }
  .content-area { padding: 20px; }
}

/* ── Small Tablet (≤768px): collapse sidebar ── */
@media (max-width: 768px) {
  :root { --sidebar-w: 0px; }

  .sidebar {
    transform: translateX(-240px);
    width: 240px;
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  .sidebar-overlay.visible { display: block; }

  .main-content { margin-left: 0; }

  .menu-toggle { display: flex; }

  .topbar {
    padding: 0 16px;
  }

  .topbar-desc { display: none; }

  .content-area { padding: 16px; }

  .stat-row .stat-card { min-width: 120px; }
}

/* ── Mobile (≤480px) ── */
@media (max-width: 480px) {
  .topbar-title { font-size: 16px; }

  .content-area { padding: 12px; }

  .card-body { padding: 16px; }

  .card-header { padding: 14px 16px; }

  .btn-lg { height: 44px; font-size: 14px; padding: 0 20px; }

  .page-header h1 { font-size: 22px; }

  .tabs { gap: 1px; }
  .tab-btn { font-size: 12px; }

  .stat-card .stat-value { font-size: 18px; }

  .footer-inner { flex-direction: column; gap: 20px; }

  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ── Very small (≤360px) ── */
@media (max-width: 360px) {
  .content-area { padding: 8px; }
  .card-body { padding: 12px; }
}