/* ================= ROOT VARIABLES ================= */
:root {
  --bg-dark: #0a0f1c;
  --panel-dark: #111b2e;
  --border: rgba(255,255,255,0.12);
  --primary: #16c784;
  --secondary: #ea3943;
  --text-light: #e2e8f0;
  --text-dim: #94a3b8;
  --hover-glow: rgba(22,199,132,0.3);
  --error-color: rgba(234,57,67,0.7);
  --highlight-color: rgba(22,199,132,0.15);
}

/* ================= RESET ================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Inter", system-ui, sans-serif;
}

/* ================= BODY ================= */
body {
  min-height: 100vh;
  background: linear-gradient(145deg, #05070c, #0b1220 60%, #05070c);
  color: var(--text-light);
  display: flex;
  flex-direction: column;
  animation: bodyPulse 5s ease-in-out infinite alternate;
}

@keyframes bodyPulse {
  0% { filter: brightness(0.98); }
  100% { filter: brightness(1.03); }
}

/* ================= HEADER ================= */
header {
  padding: 30px 50px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

header h1 {
  font-size: 2.6rem;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

header h2 {
  color: var(--text-dim);
  font-weight: 400;
}

nav button#home_button {
  margin-top: 10px;
  padding: 10px 20px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #111b2e;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
}

nav button#home_button:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 15px var(--hover-glow);
  border-color: var(--primary);
}

/* ================= MAIN ================= */
main {
  padding: 36px 50px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* ================= SECTIONS ================= */
section.section,
section {
  background: linear-gradient(180deg, var(--panel-dark), #0f1722);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  backdrop-filter: blur(12px);
  min-width: fit-content;
}

/* ================= FILE INPUT ================= */
input[type="file"] {
  padding: 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0b1220;
  color: var(--text-light);
  cursor: pointer;
  transition: all 0.25s ease;
}

input[type="file"]:hover {
  box-shadow: 0 0 12px var(--hover-glow);
  border-color: var(--primary);
}

/* ================= BUTTONS ================= */
.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
}

.buttons button {
  padding: 10px 16px;
  border-radius: 12px;
  border: none;
  font-weight: 600;
  cursor: pointer;
  color: white;
  background: linear-gradient(90deg, var(--primary), rgb(34, 213, 210));
  transition: all 0.3s ease;
  animation: pulseBtn 3s ease-in-out infinite;
}

.buttons button:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 0 20px var(--hover-glow), 0 0 20px var(--secondary);
}

@keyframes pulseBtn {
  0%,100% { filter: brightness(1); }
  50% { filter: brightness(1.2); }
}

/* ================= COLUMN MENU ================= */
#column_menu {
  margin-top: 20px;
  display: none;
  flex-direction: column;
  gap: 10px;
  width: 25%;
  justify-self: center;
}

#column_menu button {
  background: #111b2e;
  color: var(--primary);
  border: 1px solid var(--primary);
}

#column_menu button:hover {
  background: var(--primary);
  color: #000;
  box-shadow: 0 0 12px var(--primary);
}

/* ================= DATE SELECTION ================= */
#date_selection {
  display: flex;
  gap: 20px;
  margin: 18px 0;
  flex-wrap: wrap;
}

#date_selection input,
#date_selection select {
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #0b1220;
  color: var(--text-light);
  transition: all 0.3s ease;
}

#date_selection input:focus,
#date_selection select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 12px var(--hover-glow);
  outline: none;
}

/* ================= OUTPUT ================= */
p {
  margin-top: 12px;
  font-weight: 600;
}

/* ================= TABLE ================= */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  border-radius: 12px;
  overflow: hidden;
  background: #111b2e;
  box-shadow: 0 0 20px rgba(0,0,0,0.5);
}

thead {
  background: #0f1722;
}

thead th {
  color: var(--primary);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
}

tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease, transform 0.2s ease;
}

tbody tr:nth-child(even) td {
  background-color: rgba(0, 0, 0, 0.08);
}

tbody tr:hover {
  background: rgba(22,199,132,0.08);
  transform: scale(1.01);
}

tbody td {
  padding: 10px 14px;
  color: var(--text-light);
  transition: background 0.2s ease, color 0.2s ease;
}

/* ================= SPECIAL COLORS ================= */
tbody td.numeric {
  color: var(--primary);
}

tbody td.negative {
  color: var(--secondary);
}

tbody td.duplicate,
tbody tr.duplicate {
  background-color: var(--error-color) !important;
}

/* ================= FOOTER ================= */
tfoot td {
  padding: 10px 14px;
  font-weight: 600;
  color: var(--secondary);
}

/* ================= ANIMATIONS ================= */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}