:root {
  /* Variables basadas en DESIGN.md (Estilo Notion) adaptado a AETICAL */
  --color-aetical-orange: #FF7B00;
  --color-paper-warmth: #f6f5f4;
  --color-pure-white: #ffffff;
  --color-ink-black: #000000;
  --color-stone: #757575;
  --color-graphite: #615d59;
  
  --font-inter: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --spacing-4: 4px;
  --spacing-8: 8px;
  --spacing-12: 12px;
  --spacing-16: 16px;
  --spacing-20: 20px;
  --spacing-24: 24px;
  --spacing-32: 32px;
  
  --radius-cards: 12px;
  --radius-buttons: 8px;
  --radius-pills: 9999px;
  --radius-small: 4px;
  
  --border-subtle: rgba(0, 0, 0, 0.2);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-inter);
    background-color: var(--color-paper-warmth);
    color: var(--color-ink-black);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 900px;
    margin: 80px auto;
    padding: 0 var(--spacing-24);
}

header {
    text-align: center;
    margin-bottom: 64px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-16);
}

.logo {
    height: 48px;
    margin-bottom: var(--spacing-8);
}

header h1 {
    font-size: 40px;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -2px;
    color: var(--color-ink-black);
}

header p {
    color: var(--color-stone);
    font-size: 16px;
}

.card {
    background: #fafafa;
    border: 1px solid rgba(0, 0, 0, 0.25);
    border-radius: var(--radius-buttons);
    padding: var(--spacing-24);
    padding-top: var(--spacing-32);
    margin-bottom: var(--spacing-32);
    margin-top: var(--spacing-16);
    position: relative;
}

.card h2 {
    position: absolute;
    top: -15px;
    left: 24px;
    background: #fafafa;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-aetical-orange);
    border: 1px solid rgba(0, 0, 0, 0.25);
    border-radius: var(--radius-pills);
    padding: 6px 16px;
    margin: 0;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.subsection-title {
    font-size: 16px;
    font-weight: 500;
    margin: var(--spacing-24) 0 var(--spacing-12);
    color: var(--color-stone);
}

/* Sub-cards para acompañantes dinámicos */
.sub-card {
    background: #f8fafc;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-buttons);
    padding: var(--spacing-16);
    margin-bottom: var(--spacing-12);
    display: flex;
    gap: var(--spacing-12);
    align-items: center;
    transition: all 0.2s ease;
}

.sub-card .form-group {
    margin-bottom: 0;
    flex: 1;
}

.btn-delete-acomp {
    background: transparent;
    border: 1px solid #ef4444;
    color: #ef4444;
    border-radius: var(--radius-small);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-delete-acomp:hover {
    background: #fee2e2;
}

/* Inputs y Formularios */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-20);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

label {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--color-ink-black);
    opacity: 0.95;
}

input[type="text"],
input[type="number"],
input[type="date"],
select,
textarea {
    padding: 10px 14px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-buttons);
    font-size: 14px;
    font-family: inherit;
    background: var(--color-pure-white);
    color: var(--color-ink-black);
    transition: all 0.2s ease;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--color-aetical-orange);
    box-shadow: 0 0 0 2px rgba(255, 123, 0, 0.15);
}

/* Utilidades */
.mt-2 { margin-top: var(--spacing-20); }
.mr-2 { margin-right: var(--spacing-12); }

.transport-options {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
}

.radio-label, .checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-8);
    cursor: pointer;
    font-weight: 500;
    font-size: 14px;
}

.transport-chip {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-buttons);
    background: var(--color-pure-white);
    color: #64748b;
    cursor: pointer;
    font-weight: 500;
    font-size: 13.5px;
    transition: all 0.2s ease;
    user-select: none;
    height: 40px;
    box-sizing: border-box;
}

.transport-chip i {
    transition: all 0.2s ease;
    color: #94a3b8;
}

.transport-chip input[type="checkbox"] {
    display: none;
}

.transport-chip:hover {
    border-color: #cbd5e1;
    background: #f8fafc;
    color: var(--color-ink-black);
}

.transport-chip:hover i {
    color: var(--color-ink-black);
}

.transport-chip:has(input:checked) {
    background: #FFF3E0;
    border-color: var(--color-aetical-orange);
    color: var(--color-aetical-orange);
    box-shadow: 0 0 0 1px var(--color-aetical-orange);
}

.transport-chip:has(input:checked) i {
    color: var(--color-aetical-orange);
}

.amount {
    padding: 10px;
    background: #FFF3E0;
    border-radius: var(--radius-buttons);
    font-weight: 600;
    color: var(--color-aetical-orange);
    text-align: right;
    border: 1px solid rgba(255,123,0,0.1);
}

/* Lista de Gastos */
.expense-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-12);
}

.expense-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-16);
    padding: var(--spacing-8) 0;
    border-bottom: 1px solid var(--border-subtle);
}
.expense-row:last-child {
    border-bottom: none;
}

.expense-label {
    flex: 1;
    font-weight: 500;
    font-size: 14px;
}

.expense-input {
    width: 120px;
    text-align: left;
}

/* File Upload Button */
.file-upload {
    position: relative;
    overflow: hidden;
    display: inline-block;
    cursor: pointer;
}

.file-upload input[type="file"] {
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    cursor: pointer;
    height: 100%;
}

.file-upload span {
    display: inline-block;
    padding: 6px 12px;
    background: transparent;
    color: var(--color-ink-black);
    opacity: 0.9;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-small);
    font-size: 12px;
    font-weight: 500;
    transition: background 0.2s ease;
}

.file-upload:hover span {
    background: rgba(0,0,0,0.03);
}

/* Totales Card */
.totals-row {
    display: flex;
    justify-content: space-between;
    font-size: 16px;
    padding: var(--spacing-8) 0;
}

.totals-row.highlight {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-aetical-orange);
    border-top: 1px dashed var(--border-subtle);
    margin-top: var(--spacing-12);
    padding-top: var(--spacing-16);
}

/* --- WIZARD STYLES --- */
.form-step {
    display: none;
    animation: fadeIn 0.2s ease-out forwards;
}

.form-step.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.step-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-24);
}

/* Botones */
.btn-primary, .btn-primary-outline, .btn-secondary {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-buttons);
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-8);
}

.btn-secondary {
    background: transparent;
    color: var(--color-stone);
    border: 1px solid var(--border-subtle);
}
.btn-secondary:hover:not(:disabled) {
    background: rgba(0,0,0,0.04);
}
.btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary-outline {
    background: transparent;
    color: var(--color-aetical-orange);
    border: 1px solid var(--color-aetical-orange);
}
.btn-primary-outline:hover {
    background: var(--color-aetical-orange);
    color: white;
}

.btn-primary {
    background: var(--color-aetical-orange);
    color: white;
    border: none;
    border-radius: var(--radius-pills);
    padding: 10px 24px;
    font-size: 16px;
}
.btn-primary:hover {
    background: #e66a00;
}

.submit-section {
    text-align: center;
    margin-top: var(--spacing-32);
}

/* Progress Bar */
.progress-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-16);
    padding: 0 var(--spacing-24);
}

.progress-step {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-pills);
    background: var(--color-pure-white);
    border: 2px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
    color: var(--color-stone);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 2;
    cursor: pointer;
}

.progress-step:hover {
    transform: scale(1.1);
    border-color: var(--color-aetical-orange);
    color: var(--color-aetical-orange);
    box-shadow: 0 4px 12px rgba(255, 123, 0, 0.15);
}

.progress-step.active, .progress-step.completed {
    background: var(--color-aetical-orange);
    border-color: var(--color-aetical-orange);
    color: white;
}

.progress-step.active:hover, .progress-step.completed:hover {
    color: white;
}

.progress-line {
    flex: 1;
    height: 2px;
    background: var(--border-subtle);
    margin: 0 var(--spacing-8);
    transition: all 0.2s ease;
}

.progress-line.completed {
    background: var(--color-aetical-orange);
}

.progress-labels {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-32);
    padding: 0 var(--spacing-12);
    font-size: 12px;
    color: var(--color-stone);
    font-weight: 400;
}

.progress-labels span {
    width: 60px;
    text-align: center;
}

/* Resumen Container */
.resumen-container {
    background: #f8fafc;
    border-radius: var(--radius-cards);
    padding: 24px;
    margin-top: 32px;
    border: 1px solid #e2e8f0;
    box-shadow: inset 0 2px 4px 0 rgba(0, 0, 0, 0.02);
}

.resumen-container h3 {
    margin-top: 0;
    margin-bottom: 20px;
    color: var(--color-ink-black);
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 16px;
    border-bottom: 2px solid #e2e8f0;
}

.resumen-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid #e2e8f0;
    font-size: 14px;
}

.resumen-item:last-child {
    border-bottom: none;
}

.resumen-label {
    color: #64748b;
    font-weight: 500;
}

.resumen-value {
    color: var(--color-ink-black);
    font-weight: 600;
    text-align: right;
    max-width: 60%;
}

.resumen-value.is-empty {
    font-weight: normal;
}

.empty-badge {
    background: #f1f5f9;
    color: #64748b;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    border: 1px solid #e2e8f0;
}

.resumen-item.total-highlight {
    background: rgba(249, 115, 22, 0.1);
    padding: 16px;
    border-radius: 8px;
    margin-top: 12px;
    border: 1px solid rgba(249, 115, 22, 0.2);
    border-bottom: none;
}

.resumen-item.total-highlight .resumen-label {
    color: var(--color-aetical-orange);
    text-transform: uppercase;
    font-size: 13px;
    letter-spacing: 0.5px;
}

.resumen-item.total-highlight .resumen-value {
    color: var(--color-aetical-orange);
    font-size: 18px;
    font-weight: 800;
}

.status-message {
    margin-top: var(--spacing-16);
    font-size: 14px;
    font-weight: 500;
}

.status-success { color: #10B981; }
.status-error { color: #EF4444; }

@media (max-width: 600px) {
    .expense-row {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-8);
    }
    .expense-input {
        width: 100%;
    }
}

/* Spinner Animation */
.spinner {
    animation: spin 1s linear infinite;
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* File List Styles */
.file-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: #f1f5f9;
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-small);
    margin-bottom: 6px;
    font-size: 13px;
    color: var(--color-ink-black);
}

.file-list-item span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 80%;
}

.file-list-item button {
    background: none;
    border: none;
    color: #ef4444;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
}

.file-list-item button:hover {
    color: #b91c1c;
}