@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Quicksand:wght@300&display=swap");

/* =========================================================
   Design tokens
   ========================================================= */
:root {
  /* Brand */
  --color-accent:        #2563a8;
  --color-accent-hover:  #1d4f8a;
  --color-accent-soft:   #eaf1f9;

  /* Neutrals */
  --color-bg:            #f7f8fa;
  --color-surface:       #ffffff;
  --color-surface-alt:   #f1f3f6;
  --color-border:        #e4e7eb;
  --color-border-strong: #cbd2d9;
  --color-text:          #1f2933;
  --color-text-muted:    #616e7c;
  --color-text-subtle:   #9aa5b1;

  /* Status */
  --color-danger:  #c53030;
  --color-warning: #b7791f;
  --color-success: #2f855a;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  /* Radii */
  --radius-sm: 3px;
  --radius-md: 5px;
  --radius-lg: 8px;

  /* Shadows */
  --shadow-1: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-2: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --focus-ring: 0 0 0 3px var(--color-accent-soft);

  /* Typography */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Menlo, Consolas, monospace;

  --fs-xs:   12px;
  --fs-sm:   13px;
  --fs-base: 14px;
  --fs-md:   15px;
  --fs-lg:   17px;
  --fs-xl:   20px;
  --fs-2xl:  24px;

  --lh-tight: 1.25;
  --lh-base:  1.5;

  /* Form controls */
  --control-height:    34px;
  --control-padding-x: 10px;
}

/* =========================================================
   Reset + base
   ========================================================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text);
  line-height: var(--lh-tight);
}

h1 { font-size: var(--fs-2xl); }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-lg); }
h4 { font-size: var(--fs-md); }
h5, h6 { font-size: var(--fs-base); }

a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); text-decoration: underline; }

hr { border: 0; border-top: 1px solid var(--color-border); margin: var(--space-4) 0; }

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: 500;
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  transition: background-color 0.12s ease, border-color 0.12s ease, color 0.12s ease, box-shadow 0.12s ease;
}
.btn:focus, .btn.focus { box-shadow: var(--focus-ring); outline: none; }

.btn-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}
.btn-primary:hover,
.btn-primary:focus,
.btn-primary:not(:disabled):not(.disabled):active {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn-secondary, .btn-outline-secondary {
  background: var(--color-surface);
  border-color: var(--color-border-strong);
  color: var(--color-text);
}
.btn-secondary:hover, .btn-outline-secondary:hover {
  background: var(--color-surface-alt);
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.btn-danger  { background: var(--color-danger);  border-color: var(--color-danger);  }
.btn-success { background: var(--color-success); border-color: var(--color-success); }

.btn-sm { padding: 4px 10px; font-size: var(--fs-xs); }
.btn-lg { padding: 8px 18px; font-size: var(--fs-md); }

/* =========================================================
   Cards / surfaces
   ========================================================= */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}
.card-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-4);
  font-weight: 600;
  font-size: var(--fs-sm);
}
.card-body { padding: var(--space-4); }

/* =========================================================
   Forms
   ========================================================= */
.form-control,
.form-select,
.Select-control,
.input-group-text,
textarea.form-control {
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  height: var(--control-height);
  padding: 4px var(--control-padding-x);
  box-shadow: none;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}
textarea.form-control { height: auto; min-height: calc(var(--control-height) * 2); }

.form-control:focus,
.form-select:focus,
.Select-control.is-focused {
  border-color: var(--color-accent);
  box-shadow: var(--focus-ring);
  outline: none;
}

.form-control::placeholder { color: var(--color-text-subtle); }

.form-label, label {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.form-check-label { text-transform: none; letter-spacing: 0; font-weight: 400; color: var(--color-text); font-size: var(--fs-sm); }
.form-check-input:checked { background-color: var(--color-accent); border-color: var(--color-accent); }

/* React-Select (dash-core-components Dropdown) */
.Select-menu-outer {
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-2);
  font-size: var(--fs-sm);
}
.Select-option.is-focused { background: var(--color-accent-soft); color: var(--color-text); }
.Select-option.is-selected { background: var(--color-accent); color: #fff; }

/* =========================================================
   Tables
   ========================================================= */
.table { font-size: var(--fs-sm); color: var(--color-text); }
.table thead th {
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border-strong);
  background: var(--color-surface-alt);
  padding: var(--space-2) var(--space-3);
}
.table td, .table th {
  padding: var(--space-2) var(--space-3);
  border-top: 1px solid var(--color-border);
  vertical-align: middle;
}
.table-hover tbody tr:hover { background: var(--color-accent-soft); }

/* dash-table */
.dash-spreadsheet, .dash-spreadsheet-container {
  font-family: var(--font-sans) !important;
  font-size: var(--fs-sm) !important;
}
.dash-header { background: var(--color-surface-alt) !important; color: var(--color-text-muted) !important; font-weight: 600 !important; }

/* =========================================================
   Nav / sidebar
   ========================================================= */
.nav-link {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: var(--fs-sm);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
}
.nav-link:hover { color: var(--color-text); background: var(--color-surface-alt); }
.nav-link.active { color: var(--color-accent); background: var(--color-accent-soft); }

.navbar { background: var(--color-surface); border-bottom: 1px solid var(--color-border); box-shadow: var(--shadow-1); }
.navbar-brand { font-weight: 600; letter-spacing: -0.01em; color: var(--color-text); }

/* =========================================================
   Misc app utilities
   ========================================================= */
.small-font {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}
.custom-dropdown-label,
.custom-dropdown-label2 {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

#container-basic {
  position: relative;
  z-index: 1000;
  background: var(--color-surface);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
}

.graph-container { width: 100%; max-width: 100%; }

/* =========================================================
   Home page hero (preserved)
   ========================================================= */
.ml1 { font-family: "Quicksand", sans-serif; font-weight: 900; font-size: 3.5em; }
.ml1 .letter { display: inline-block; line-height: 1em; }
.ml1 .text-wrapper {
  position: relative;
  display: inline-block;
  padding-top: 0.1em;
  padding-right: 0.05em;
  padding-bottom: 0.15em;
}
.ml1 .line {
  opacity: 0;
  position: absolute;
  left: 0;
  height: 3px;
  width: 100%;
  background-color: #fff;
  transform-origin: 0 0;
}
.ml1 .line1 { top: 0; }
.ml1 .line2 { bottom: 0; }

.home-card-hover { transition: background 0.2s, border-color 0.2s, transform 0.15s; }
.home-card-hover:hover {
  background: rgba(255, 255, 255, 0.22) !important;
  border-color: rgba(255, 255, 255, 0.55) !important;
  transform: translateY(-2px);
}