:root {
  --bg: #e79a5a;
  --bg-alt: #f1b27a;
  --surface: #f7f4ef;
  --surface-2: #ece6de;
  --text: #1f2a35;
  --text-soft: #4f5c68;
  --border: #b0a89a;
  --primary: #1f3a57;
  --primary-hover: #173047;
  --success: #5b7471;
  --danger: #9b4e3d;
  --warning: #b86f33;
  --shadow: rgba(31, 58, 87, 0.12);
  --shadow-strong: rgba(31, 58, 87, 0.18);
}

html { scroll-behavior: smooth; }
body {
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 20px;
}

h1 { text-align: center; margin-bottom: 20px; color: var(--primary); }
h2, h3 { color: var(--primary); }
.container { max-width: 1200px; margin: auto; }

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 22px;
  padding: 8px 0;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 10px; background: var(--primary);
  color: #ffffff; display: grid; place-items: center; font-weight: 700;
  box-shadow: 0 6px 14px rgba(31, 58, 87, 0.18);
}
.brand-name { font-weight: 700; color: var(--primary); font-size: 16px; }
.site-nav { display: flex; gap: 24px; }
.site-nav a { text-decoration: none; color: var(--primary); font-weight: 600; }
.site-nav a:hover { opacity: 0.75; }

.card {
  background: var(--surface);
  padding: 20px;
  margin-top: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 20px var(--shadow);
  border: 1px solid var(--border);
}

.hero {
  padding: 30px 0 40px;
  background: radial-gradient(circle at top, rgba(229,229,229,.18), transparent 35%), var(--bg);
}
.hero-shell {
  background: rgba(247, 244, 239, 0.42);
  border: 1px solid rgba(31, 58, 87, 0.12);
  border-radius: 28px;
  padding: 28px;
  box-shadow: 0 18px 40px var(--shadow-strong);
  backdrop-filter: blur(3px);
}
.hero-inner { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 34px; align-items: center; }
.eyebrow {
  color: var(--primary); text-transform: uppercase; letter-spacing: 0.08em;
  font-size: 12px; font-weight: 700; margin-bottom: 12px;
}
.hero-copy h1 { text-align: left; font-size: 58px; line-height: 1.02; margin: 0 0 18px; max-width: 760px; }
.hero-text { font-size: 18px; max-width: 700px; margin-bottom: 24px; line-height: 1.45; }
.hero-actions, .login-actions, .upload-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-points { display: flex; gap: 20px; flex-wrap: wrap; color: var(--primary); font-size: 14px; }
.btn, button {
  display: inline-block; text-decoration: none; padding: 12px 18px; border-radius: 12px;
  font-weight: 700; transition: 0.2s ease; cursor: pointer;
}
.btn-primary, button { background: var(--primary); color: #ffffff; border: none; }
.btn-primary:hover, button:hover { background: var(--primary-hover); }
.btn-secondary, .button-secondary {
  background: transparent; color: var(--primary); border: 1px solid var(--primary);
}
.btn-secondary:hover, .button-secondary:hover { background: rgba(31, 58, 87, 0.08); }
button:disabled { opacity: 0.6; cursor: not-allowed; }

.hero-card { display: flex; justify-content: center; }
.mock-card {
  width: 100%; max-width: 460px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 20px; padding: 18px; box-shadow: 0 14px 34px var(--shadow-strong);
}
.mock-top { display: flex; gap: 10px; margin-bottom: 18px; }
.mock-pill { background: var(--surface-2); color: var(--primary); padding: 8px 12px; border-radius: 999px; font-size: 13px; }
.mock-chart {
  height: 180px; border-radius: 14px; background: linear-gradient(to top, rgba(31,58,87,.07), transparent), var(--surface-2);
  border: 1px solid var(--border); margin-bottom: 16px; position: relative; overflow: hidden;
}
.mock-chart::after {
  content: ""; position: absolute; left: 6%; right: 4%; bottom: 20px; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--success), var(--bg)); transform: skewY(-7deg);
}
.mock-list { display: flex; flex-direction: column; gap: 10px; }
.mock-row {
  display: grid; grid-template-columns: 1.2fr 1fr auto; gap: 10px; padding: 10px 12px;
  border-radius: 10px; background: var(--surface-2); font-size: 14px;
}

.section { padding: 72px 0; }
.section-alt { background: rgba(229,229,229,.16); border-radius: 18px; }
.section-heading { max-width: 760px; margin: 0 auto 34px; text-align: center; }
.section-heading h2 { margin: 0 0 14px; font-size: 38px; }
.section-heading p { font-size: 17px; line-height: 1.6; }
.steps-grid, .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step-card, .feature-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  padding: 22px; box-shadow: 0 4px 20px var(--shadow);
}
.step-number {
  width: 38px; height: 38px; border-radius: 999px; background: var(--primary); color: #fff;
  display: grid; place-items: center; font-weight: 700; margin-bottom: 16px;
}

.login-page { min-height: 100vh; }
.login-shell { display: grid; place-items: center; min-height: calc(100vh - 140px); }
.login-card {
  width: 100%; max-width: 980px; display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center;
}
.login-panel h1 { text-align: left; margin: 0 0 16px; font-size: 44px; }
.login-copy, .auth-note { color: var(--text-soft); line-height: 1.6; }
.login-form-shell, .auth-form-shell {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 16px; padding: 22px;
}
.login-form-shell input, .auth-form-shell input, .table-controls input, .table-controls select {
  width: 100%; box-sizing: border-box; margin-top: 0; margin-bottom: 12px; padding: 12px;
  border-radius: 8px; border: 1px solid var(--border); background: #ffffff; color: var(--text);
}
.auth-status {
  margin-top: 16px; padding: 14px 16px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface-2);
}

.page-shell { padding-top: 10px; }
.app-topbar { margin-bottom: 30px; }
.app-user-area { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; justify-content: flex-end; }
.app-user-chip {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 999px; padding: 10px 14px;
}

.upload-card { text-align: center; padding-top: 30px; padding-bottom: 30px; }
.upload-dropzone {
  border: 2px dashed var(--border); border-radius: 12px; padding: 30px 20px; background: var(--surface);
  transition: 0.2s ease; cursor: pointer;
}
.upload-dropzone.dragover { border-color: var(--primary); background: #efe8df; transform: scale(1.02); }
.upload-title { font-size: 18px; font-weight: 600; margin-bottom: 8px; color: var(--primary); }
.upload-subtext, .selected-file { color: var(--text-soft); font-size: 14px; }
#fileInput { display: none; }

.summary-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.summary-item {
  background: var(--surface-2); padding: 12px; border-radius: 8px; font-size: 14px; border: 1px solid var(--border);
}
.income, .amount-positive { color: var(--success); }
.expense, .amount-negative { color: var(--danger); }
.net-positive { color: var(--success); }
.net-negative { color: var(--danger); }
#categoryList div, #monthlyBreakdown div { padding: 6px 0; border-bottom: 1px solid var(--border); }

.table-controls { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 12px; margin-bottom: 16px; }
.monthly-breakdown-card { background: var(--surface-2); margin-bottom: 16px; }
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th { background: var(--surface-2); color: var(--primary); }
th, td { padding: 10px; border-bottom: 1px solid var(--border); text-align: left; }
.amount-cell { text-align: right; font-variant-numeric: tabular-nums; }
.table-wrapper { overflow-x: auto; }

.chart-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-top: 10px; align-items: start; }
.chart-box {
  background: var(--surface); padding: 16px; border-radius: 14px; border: 1px solid var(--border);
  box-shadow: 0 8px 22px var(--shadow-strong); min-height: 260px; display: flex; flex-direction: column;
}
.chart-box canvas {
  width: 100% !important; height: 350px !important; background: var(--surface-2);
  border-radius: 8px; display: block;
}

.status-loading { background: #efe0d3; border-left: 4px solid var(--warning); }
.status-error { background: #f1d8d3; border-left: 4px solid var(--danger); }
.status-success { background: #dde5e3; border-left: 4px solid var(--success); }
.site-footer { padding: 26px 0 40px; color: var(--primary); text-align: center; }

@media (max-width: 960px) {
  .site-header { flex-direction: column; gap: 14px; align-items: flex-start; }
  .site-nav { flex-wrap: wrap; gap: 14px; }
  .hero-inner, .steps-grid, .feature-grid, .login-card { grid-template-columns: 1fr; }
  .hero-copy h1, .login-panel h1 { text-align: center; font-size: 40px; }
  .hero-text, .hero-actions, .hero-points, .login-copy { justify-content: center; text-align: center; margin-left: auto; margin-right: auto; }
  .hero-shell { padding: 22px; }
  .section-heading h2 { font-size: 32px; }
  .app-user-area { justify-content: flex-start; }
}

@media (max-width: 768px) {
  .chart-grid, .summary-grid, .table-controls { grid-template-columns: 1fr; }
  .login-actions, .upload-actions, .app-user-area { flex-direction: column; align-items: stretch; }
  .login-actions button, .upload-actions button, .app-user-area button { width: 100%; }
  .app-user-chip { border-radius: 12px; }
}