/* 
========================================================================
   AI Tools for Teachers Webinar Registration System - Form Stylesheet
   Author: Senior Full Stack Developer & UI/UX Specialist
========================================================================
*/

/* --- Multi-step Registration Container --- */
.register-section {
    padding: 130px 0 100px 0;
    min-height: 100vh;
    background: radial-gradient(120% 120% at 50% 10%, var(--bg-main) 40%, rgba(14, 165, 233, 0.06) 100%);
    display: flex;
    align-items: center;
}

.form-wrapper {
    max-width: 700px;
    margin: 0 auto;
    width: 100%;
}

.form-container {
    padding: 40px;
}

/* --- Step Progress Bar --- */
.progress-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    margin-bottom: 40px;
}

.progress-container::before {
    content: '';
    background-color: var(--border-color);
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    height: 3px;
    width: 100%;
    z-index: 1;
}

.progress-bar-fill {
    content: '';
    background: linear-gradient(to right, var(--primary), var(--secondary));
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    height: 3px;
    width: 0%;
    z-index: 2;
    transition: width 0.4s ease;
}

.step-node {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-main);
    border: 3px solid var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 700;
    color: var(--text-muted);
    position: relative;
    z-index: 3;
    transition: all 0.4s ease;
}

.step-node.active {
    border-color: var(--primary);
    background-color: var(--bg-main);
    color: var(--primary);
    box-shadow: 0 0 15px var(--accent-glow);
}

.step-node.completed {
    border-color: var(--success);
    background-color: var(--success);
    color: #fff;
}

.step-label {
    position: absolute;
    top: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
    color: var(--text-muted);
    transition: var(--transition);
}

.step-node.active .step-label {
    color: var(--primary);
}

.step-node.completed .step-label {
    color: var(--success);
}

/* --- Form Steps Layout --- */
.form-step {
    display: none;
    animation: fadeInSlide 0.4s ease forwards;
}

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

@keyframes fadeInSlide {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.step-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 24px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

/* --- Form Fields UI --- */
.form-group {
    margin-bottom: 22px;
}

.form-group.half-width {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-main);
}

label span {
    color: #ef4444;
}

.input-control {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-size: 0.95rem;
    transition: var(--transition);
}

.input-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-control::placeholder {
    color: var(--text-muted);
    opacity: 0.6;
}

/* Select Fields Custom Styling */
select.input-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230ea5e9' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
    padding-right: 40px;
}

/* Radio Button Grid */
.radio-group-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-top: 5px;
}

.radio-card {
    position: relative;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
}

.radio-card input[type="radio"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.radio-checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: var(--transition);
}

.radio-checkmark::after {
    content: '';
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--primary);
    transform: scale(0);
    transition: var(--transition);
}

.radio-card input[type="radio"]:checked ~ .radio-checkmark {
    border-color: var(--primary);
}

.radio-card input[type="radio"]:checked ~ .radio-checkmark::after {
    transform: scale(1);
}

.radio-card:hover {
    border-color: var(--primary);
    background-color: var(--accent-glow);
}

.radio-card input[type="radio"]:checked ~ span {
    color: var(--primary);
    font-weight: 600;
}

/* --- Conditional Form Fields --- */
.conditional-fields {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out, opacity 0.3s ease;
    opacity: 0;
}

.conditional-fields.show {
    max-height: 300px;
    opacity: 1;
    margin-top: 15px;
}

/* --- Step 2: Payment Custom styles --- */
.payment-info-box {
    text-align: center;
    padding: 24px;
    background: var(--accent-glow);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
}

.payment-fee {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary);
    margin: 8px 0;
}

.qr-link {
    display: block;
    max-width: 210px;
    margin: 20px auto;
    text-decoration: none;
    transition: var(--transition);
}

.qr-link:hover {
    transform: translateY(-4px);
}

.qr-code-wrapper {
    background: #fff;
    padding: 16px;
    border-radius: var(--radius-sm);
    width: 210px;
    height: 210px;
    margin: 0 auto;
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: center;
    align-items: center;
}

.qr-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Direct UPI Pay Button green scheme */
.upi-pay-btn {
    background: linear-gradient(135deg, #10b981, #059669) !important;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.25) !important;
    color: #fff !important;
}

.upi-pay-btn:hover {
    background: linear-gradient(135deg, #059669, #047857) !important;
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.35) !important;
    transform: translateY(-2px) !important;
}

.upi-id-box {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    margin-top: 10px;
}

.upi-id {
    font-weight: 700;
    color: var(--text-main);
    background-color: var(--bg-main);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    border: 1px dashed var(--border-color);
}

.copy-upi-btn {
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    font-size: 1rem;
    padding: 4px;
    transition: var(--transition);
}

.copy-upi-btn:hover {
    color: var(--primary-hover);
    transform: scale(1.1);
}

/* Instructions lists */
.instructions-list {
    text-align: left;
    margin: 20px 0;
    padding-left: 20px;
    font-size: 0.9rem;
}

.instructions-list li {
    list-style-type: decimal;
    margin-bottom: 8px;
    color: var(--text-muted);
}

/* Drag & Drop File Zone */
.drag-drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-sm);
    padding: 30px;
    text-align: center;
    background-color: var(--bg-main);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.drag-drop-zone.dragover {
    border-color: var(--primary);
    background-color: var(--accent-glow);
}

.drag-drop-icon {
    font-size: 2.2rem;
    color: var(--primary);
    margin-bottom: 12px;
}

.drag-drop-text {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.drag-drop-text span {
    color: var(--primary);
    font-weight: 600;
}

.drag-drop-subtext {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.file-input-hidden {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* Image preview box */
.screenshot-preview-container {
    margin-top: 15px;
    display: none;
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.screenshot-preview-container.active {
    display: block;
}

.screenshot-img {
    width: 100%;
    max-height: 250px;
    object-fit: contain;
    display: block;
    background-color: rgba(15, 23, 42, 0.05);
    padding: 10px;
}

.remove-screenshot-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: rgba(239, 68, 68, 0.9);
    color: #fff;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.remove-screenshot-btn:hover {
    background-color: #dc2626;
    transform: scale(1.05);
}

/* --- Step 3: Confirmation Styles --- */
.confirm-checkbox-group {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    cursor: pointer;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 24px;
    user-select: none;
    transition: var(--transition);
}

.confirm-checkbox-group:hover {
    border-color: var(--primary);
    background-color: var(--accent-glow);
}

.confirm-checkbox-group input[type="checkbox"] {
    margin-top: 4px;
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
    cursor: pointer;
}

.confirm-checkbox-group span {
    font-size: 0.9rem;
    color: var(--text-main);
    line-height: 1.4;
}

/* Referral grid */
.referral-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.referral-card {
    position: relative;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
    font-size: 0.85rem;
}

.referral-card input[type="radio"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.referral-dot {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: var(--transition);
}

.referral-dot::after {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--primary);
    transform: scale(0);
    transition: var(--transition);
}

.referral-card input[type="radio"]:checked ~ .referral-dot {
    border-color: var(--primary);
}

.referral-card input[type="radio"]:checked ~ .referral-dot::after {
    transform: scale(1);
}

.referral-card:hover {
    border-color: var(--primary);
    background-color: var(--accent-glow);
}

.referral-card input[type="radio"]:checked ~ span {
    color: var(--primary);
    font-weight: 600;
}

/* Receive updates switch */
.updates-switch-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    margin-top: 24px;
}

.switch-label-info h5 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.switch-label-info p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

.switch input:checked + .slider {
    background-color: var(--primary);
}

.switch input:checked + .slider:before {
    transform: translateX(24px);
}

/* --- Form Error Validation Styles --- */
.error-msg {
    color: #ef4444;
    font-size: 0.75rem;
    margin-top: 5px;
    display: none;
    font-weight: 500;
}

.form-group.invalid .input-control {
    border-color: #ef4444;
    background-color: rgba(239, 68, 68, 0.03);
}

.form-group.invalid .error-msg {
    display: block;
}

/* --- Form Navigation Button Bar --- */
.form-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
    gap: 15px;
}

.form-navigation .btn {
    flex: 1;
}

.form-navigation .btn-prev {
    display: none;
}

/* Button Loading Spinner State */
.btn-loading {

    position: relative;
    color: white !important;
    pointer-events: none;
}

.btn-loading::after {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-top: -10px;
    margin-left: -10px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: btnSpinner 0.8s linear infinite;
}

@keyframes btnSpinner {
    to { transform: rotate(360deg); }
}

/* ========================================================================
   UPI App Chooser Modal Styling
   ======================================================================== */
.upi-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(11, 15, 25, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.upi-modal-overlay.show {
    display: flex;
    opacity: 1;
}

.upi-modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 30px;
    width: 90%;
    max-width: 420px;
    text-align: center;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: var(--shadow-lg);
}

.upi-modal-overlay.show .upi-modal-content {
    transform: scale(1);
}

.close-modal-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    font-size: 2.2rem;
    color: var(--text-muted);
    cursor: pointer;
    line-height: 1;
    transition: var(--transition);
}

.close-modal-btn:hover {
    color: var(--text-main);
    transform: rotate(90deg);
}

.upi-modal-title {
    font-size: 1.35rem;
    font-weight: 750;
    color: var(--text-main);
    margin-bottom: 6px;
    letter-spacing: -0.3px;
}

.upi-modal-subtitle {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 25px;
}

.upi-app-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.upi-app-option-btn {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 14px 20px;
    background: rgba(15, 23, 42, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--text-main);
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    text-align: left;
}

.upi-app-option-btn:hover {
    background: var(--accent-glow);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.upi-icon {
    font-size: 1.5rem;
    width: 28px;
    text-align: center;
    display: inline-flex;
    justify-content: center;
    align-items: center;
}

.gpay-color { color: #4285F4; }
.phonepe-color { color: #5f259f; }
.paytm-color { color: #00baf2; }
.other-color { color: #10b981; }

[data-theme="dark"] .upi-app-option-btn {
    background: rgba(15, 23, 42, 0.45);
}