/* Base Styles (Keep your existing base styles: :root, body, .form-container, .logo, h2 etc.) */
:root {
    --theme-color: #8089ff;
    --theme-color-darker: #6a73ff;
    --text-color: #333;
    --text-color-light: #555;
    --border-color: #dfe3e6;
    --input-bg: #ffffff;
    --button-text: #ffffff;
    --background-color: #f8f9fa;
    --container-bg: #ffffff;
    --success-bg: #e9f7ef;
    --success-text: #146c43;
    --error-bg: #fdecea;
    --error-text: #a42830;
    --error-border: #e85a64;
    --shadow-color: rgba(100, 100, 150, 0.1);
    --disabled-color: #ced4da;
    --price-highlight-color: #007bff; /* Color for highlighting price */
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--background-color);
    display: flex; justify-content: center; align-items: flex-start;
    min-height: 100vh; padding: 40px 20px; line-height: 1.6; color: var(--text-color);
}

.form-container {
    background-color: var(--container-bg); padding: 35px 45px; border-radius: 12px;
    box-shadow: 0 6px 25px var(--shadow-color); max-width: 650px; width: 100%;
    text-align: center; margin-top: 20px; margin-bottom: 20px; border: 1px solid var(--border-color);
}

.logo { max-width: 180px; margin-bottom: 30px; height: auto; }
h2 { margin-bottom: 30px; color: var(--text-color); font-weight: 600; font-size: 1.8em; }

/* Form Elements */
fieldset { border: 1px solid var(--border-color); padding: 20px 25px; margin-bottom: 25px; border-radius: 8px; }
legend { padding: 0 10px; font-weight: 600; color: var(--theme-color); font-size: 1.1em; }
.form-group { margin-bottom: 22px; text-align: left; position: relative; }

label { display: block; margin-bottom: 8px; font-weight: 500; color: var(--text-color-light); font-size: 0.95em; }
label.required::after { content: '*'; color: var(--error-border); margin-left: 4px; font-weight: bold; }

input[type="text"], input[type="email"], input[type="tel"], textarea, input[type="file"] {
    width: 100%; padding: 12px 15px; border: 1px solid var(--border-color); border-radius: 8px;
    font-size: 1em; color: var(--text-color); background-color: var(--input-bg);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
input:focus, textarea:focus {
    border-color: var(--theme-color); outline: none;
    box-shadow: 0 0 0 3px rgba(128, 137, 255, 0.25);
}
input::placeholder, textarea::placeholder { color: #aaa; }
textarea { resize: vertical; min-height: 80px; }

/* Standard Mobile Input Hint */
.field-hint { display: block; font-size: 0.8em; color: var(--text-color-light); margin-top: 4px; }


/* File Input Styling */
input[type="file"] { padding: 10px; line-height: 1.4; }
input[type="file"]::file-selector-button {
    background-color: var(--theme-color); color: var(--button-text); border: none;
    padding: 8px 15px; border-radius: 6px; cursor: pointer; transition: background-color 0.3s ease;
    margin-right: 15px; font-weight: 500;
}
input[type="file"]::file-selector-button:hover { background-color: var(--theme-color-darker); }


/* PIN Code Lookup Styling */
.address-section { margin-bottom: 18px; }
.pincode-lookup-group { display: flex; gap: 10px; align-items: center; }
.pincode-lookup-group input { flex-grow: 1; }
#lookupPinButton {
    padding: 10px 15px; background-color: var(--theme-color); color: var(--button-text);
    border: none; border-radius: 6px; cursor: pointer; font-size: 0.9em;
    transition: background-color 0.3s ease; white-space: nowrap; flex-shrink: 0;
}
#lookupPinButton:hover { background-color: var(--theme-color-darker); }
.lookup-status { display: block; font-size: 0.85em; margin-top: 5px; min-height: 1.2em; }
.lookup-status.success { color: #198754; } /* Green */
.lookup-status.error { color: #dc3545; } /* Red */
.lookup-status.loading { color: var(--text-color-light); font-style: italic; }

/* Derived Address Fields Styling */
.address-derived-fields {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px; margin-top: 15px; padding: 15px; background-color: #f8f9fa;
    border-radius: 6px; border: 1px dashed var(--border-color);
}
.form-group.derived { margin-bottom: 0; }
input[readonly] { background-color: #e9ecef; cursor: not-allowed; opacity: 0.8; border-style: dashed; }
input[readonly]:focus { box-shadow: none; border-color: var(--border-color); }

/* Plan Selection Styling */
.plan-selection label.required { font-weight: 600; margin-bottom: 15px; display: block; }
.plan-options { display: flex; flex-direction: column; gap: 15px; }
.plan-option {
    border: 1px solid var(--border-color); border-radius: 8px; padding: 15px;
    display: flex; align-items: flex-start; gap: 12px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease; cursor: pointer;
}
.plan-option:hover { border-color: var(--theme-color-darker); }
.plan-option input[type="radio"] {
     margin-top: 3px; flex-shrink: 0; accent-color: var(--theme-color);
     cursor: pointer; width: 18px; height: 18px;
}
.plan-option label { flex-grow: 1; margin-bottom: 0; font-weight: 400; font-size: 0.95em; cursor: pointer; }
.plan-option label strong { font-weight: 600; color: var(--text-color); display: block; margin-bottom: 3px; font-size: 1.05em; }
.plan-option label small { font-size: 0.85em; color: var(--text-color-light); display: block; margin-top: 4px; }
/* Highlight the Price */
.plan-price {
    color: var(--price-highlight-color); /* Use a distinct color */
    font-weight: 700; /* Make it bolder */
    /* Add other styles like background if desired */
}
/* Style selected plan container */
.plan-option:has(input[type="radio"]:checked) { border-color: var(--theme-color); box-shadow: 0 0 0 2px rgba(128, 137, 255, 0.3); }


/* Submit Button */
#submitButton {
    width: 100%; padding: 14px; background-color: var(--theme-color); color: var(--button-text);
    border: none; border-radius: 8px; font-size: 1.1em; font-weight: 600; cursor: pointer;
    transition: background-color 0.3s ease, opacity 0.3s ease; margin-top: 25px; /* Increased margin */
}
#submitButton:hover:not(:disabled) { background-color: var(--theme-color-darker); }
#submitButton:disabled { background-color: var(--disabled-color); cursor: not-allowed; opacity: 0.7; }

/* Error & Success Messages */
.error-message { color: var(--error-text); font-size: 0.85em; margin-top: 6px; display: none; font-weight: 500; }
.general-error {
    background-color: var(--error-bg); border: 1px solid var(--error-border); padding: 12px;
    border-radius: 6px; margin-top: 20px; text-align: center;
}
input.invalid, textarea.invalid { border-color: var(--error-border); box-shadow: 0 0 0 3px rgba(232, 90, 100, 0.2); }
/* Ensure radios show error if needed - target the container */
.plan-options.invalid + .error-message { display: block; } /* Might need adjustment based on final HTML */


.success-message {
    background-color: var(--success-bg); color: var(--success-text); padding: 25px;
    border-radius: 8px; margin-top: 25px; text-align: center; border: 1px solid var(--success-text);
}
.success-message h3 { margin-bottom: 10px; font-size: 1.4em; }
.success-message .contact-info { margin-top: 15px; font-size: 0.9em; color: var(--text-color-light); }
.success-message .contact-info a { color: var(--theme-color); text-decoration: none; font-weight: 500; }
.success-message .contact-info a:hover { text-decoration: underline; }
/* WhatsApp Button Style (can be moved from JS if preferred) */
.whatsapp-button {
     margin-top: 20px; display: inline-block; padding: 10px 15px;
     background-color: #25D366; color: white !important; text-decoration: none;
     border-radius: 6px; font-weight: 500; transition: background-color 0.3s ease;
}
.whatsapp-button:hover { background-color: #128C7E; }


/* Responsive Design */
@media (max-width: 700px) {
    body { padding: 20px 10px; }
    .form-container { padding: 25px 20px; margin-top: 10px; margin-bottom: 10px; }
    .logo { max-width: 150px; margin-bottom: 20px; }
    h2 { font-size: 1.5em; margin-bottom: 25px; }
    button[type="submit"] { padding: 12px; font-size: 1em; }
    fieldset { padding: 15px; } legend { font-size: 1em; }
}
@media (max-width: 500px) {
    .address-derived-fields { grid-template-columns: 1fr; } /* Stack derived fields */
     .plan-option { padding: 12px; gap: 10px; }
     .plan-option label strong { font-size: 1em; }
     .plan-option label small { font-size: 0.8em; }
     .pincode-lookup-group { flex-direction: column; align-items: stretch; gap: 8px; }
}

/* REMOVED Firebase/OTP specific styles */