/* File: future-price-calculator.css */
/* --- THEME DEFINITIONS --- */
body.dark-theme {
    --bg-color: #1a1d21; --surface-color: #2c2f33; --surface-alt-color: #1f2937;
    --primary-text: #e0e0e0; --secondary-text: #a9a9a9; --border-color: #4f545c;
    --accent-color: #3b82f6; --accent-color-text: #ffffff; --danger-color: #ef4444;
}
body.light-theme {
    --bg-color: #f1f5f9; --surface-color: #ffffff; --surface-alt-color: #f8fafc;
    --primary-text: #1e293b; --secondary-text: #64748b; --border-color: #e2e8f0;
    --accent-color: #2563eb; --accent-color-text: #ffffff; --danger-color: #dc2626;
}
* { box-sizing: border-box; }
body {
    font-family: 'Sarabun', 'Kanit', sans-serif; background-color: var(--bg-color);
    color: var(--primary-text); display: flex; justify-content: center; align-items: flex-start;
    min-height: 100vh; padding: 2rem 1rem; transition: background-color 0.3s, color 0.3s;
}
#theme-toggle {
    position: fixed; top: 1rem; right: 1rem; background-color: var(--surface-color);
    border: 1px solid var(--border-color); color: var(--primary-text); width: 40px; height: 40px;
    border-radius: 50%; cursor: pointer; font-size: 1rem; z-index: 2000;
    display: flex; justify-content: center; align-items: center; transition: all 0.3s;
}
#theme-toggle:hover { transform: scale(1.1); border-color: var(--accent-color); }
.container { width: 100%; max-width: 48rem; margin: 0 auto; }
.main-card {
    background-color: var(--surface-color); border-radius: 1rem;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); padding: 1.5rem;
    border: 1px solid var(--border-color);
}
@media (min-width: 768px) { .main-card { padding: 2rem; } }
body.dark-theme .main-card { box-shadow: 0 10px 15px -3px rgba(0,0,0,0.2); }
.page-header { text-align: center; margin-bottom: 1.5rem; }
.page-header h1 { font-size: 1.875rem; font-weight: 700; color: var(--primary-text); }
.page-header p { color: var(--secondary-text); margin-top: 0.5rem; }
.form-grid { display: grid; grid-template-columns: 1fr; gap: 1rem 1.5rem; margin-bottom: 1.5rem; }
@media (min-width: 768px) { .form-grid { grid-template-columns: 1fr 1fr; } }
.input-section h2 { font-size: 1.125rem; font-weight: 600; border-bottom: 1px solid var(--border-color); padding-bottom: 0.5rem; margin-bottom: 0.75rem; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.875rem; font-weight: 500; color: var(--secondary-text); margin-bottom: 0.25rem; }
.form-group input {
    width: 100%; padding: 0.65rem; border: 1px solid var(--border-color);
    background-color: var(--surface-alt-color); color: var(--primary-text);
    border-radius: 0.5rem; transition: all 0.2s;
}
.form-group input:focus { outline: none; border-color: var(--accent-color); box-shadow: 0 0 0 3px var(--accent-color); opacity: 0.5; }
.input-hint { font-size: 0.75rem; color: var(--secondary-text); margin-top: 0.25rem; }
.button-wrapper { display: flex; flex-direction: column; gap: 0.75rem; }
@media (min-width: 640px) { .button-wrapper { flex-direction: row; } }
.btn {
    flex-grow: 1; font-weight: 700; padding: 0.75rem 1rem; border-radius: 0.5rem; border: 1px solid;
    cursor: pointer; transition: all 0.2s; display: flex; align-items: center; justify-content: center; gap: 0.5rem;
    font-size: 1rem;
}
.btn-primary { background-color: var(--accent-color); color: var(--accent-color-text); border-color: var(--accent-color); }
.btn-primary:hover { opacity: 0.9; }
.btn-secondary { background-color: transparent; color: var(--secondary-text); border-color: var(--border-color); }
.btn-secondary:hover { background-color: var(--surface-alt-color); color: var(--primary-text); }
.error-box { padding: 0.75rem; background-color: rgba(239, 68, 68, 0.1); border: 1px solid var(--danger-color); color: var(--danger-color); text-align: center; border-radius: 0.5rem; font-weight: 500; }
.error-box.hidden, .results-wrapper.hidden { display: none; }
.results-wrapper { margin-top: 2rem; }
.summary-box {
    background-color: var(--surface-alt-color); border-left: 4px solid var(--accent-color);
    padding: 1.5rem; border-radius: 0.5rem; text-align: center; margin-bottom: 1.5rem;
}
.summary-box p { color: var(--secondary-text); }
.summary-box .final-price { font-size: 2.25rem; font-weight: 700; color: var(--primary-text); margin-top: 0.25rem; }
.summary-stats { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border-color); font-size: 0.875rem; }
.summary-stats span { font-weight: 600; color: var(--primary-text); }
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 0.75rem 1rem; text-align: left; border-bottom: 1px solid var(--border-color); }
thead { background-color: var(--surface-alt-color); }
th { font-size: 0.75rem; font-weight: 600; color: var(--secondary-text); text-transform: uppercase; }
tbody tr:hover { background-color: var(--surface-alt-color); }
td:first-child { font-weight: 500; }
.assumption-text { text-align: center; font-size: 0.75rem; color: var(--secondary-text); margin-top: 1rem; }

.footer-link { text-align: center; }
.footer-link a { color: var(--secondary-text); text-decoration: none; font-size: 0.875rem; }
.footer-link a:hover { text-decoration: underline; }