/* =========================================================
   MODERN RESPONSIVE FORM DESIGN
========================================================= */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary-color: #8d1076;
    --primary-hover: #9a1a8f;
    --secondary-color: #0d6832;
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --text-main: #333333;
    --text-muted: #666666;
    --border-color: #e0e6ed;
    --input-bg: #f9fbfd;
    --danger: #e74c3c;
    --success: #2ecc71;
    --font-stack: 'Inter', 'Source Sans 3', sans-serif;
    --border-radius: 12px;
    --input-radius: 8px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 12px 32px rgba(141, 16, 118, 0.15);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body {
    background-color: var(--bg-color);
}

.conference-form-container {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
    font-family: var(--font-stack);
}

.conference-form-header {
    text-align: center;
    margin-bottom: 40px;
}

.conference-form-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.conference-form-header p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 20px;
}

.conference-form-header hr {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 2px;
    margin: 0 auto;
}

/* Card Styling */
.conference-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.03);
    transition: var(--transition);
}

.conference-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.conference-card-header {
    background: #ffffff;
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
}

.conference-card-header h5 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.conference-card-header h5 i {
    color: var(--secondary-color);
    background: rgba(13, 104, 50, 0.1);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 1.1rem;
}

.conference-card-body {
    padding: 30px 25px;
}

/* Grid & Layout */
.conference-row {
    display: flex;
    flex-wrap: wrap;
    margin: -10px;
}

.conference-col-6 {
    width: 50%;
    padding: 10px;
}

.conference-col-12 {
    width: 100%;
    padding: 10px;
}

@media (max-width: 768px) {
    .conference-col-6 {
        width: 100%;
    }
}

/* Form Fields */
.cf-field {
    margin-bottom: 5px;
}

.cf-label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-main);
    font-size: 0.95rem;
}

.text-danger {
    color: var(--danger);
    font-weight: bold;
}

.conference-form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    font-family: var(--font-stack);
    color: var(--text-main);
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--input-radius);
    transition: var(--transition);
    box-sizing: border-box;
}

.conference-form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: #ffffff;
    box-shadow: 0 0 0 4px rgba(141, 16, 118, 0.1);
}

.conference-form-control::placeholder {
    color: #a0aec0;
}

select.conference-form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23333' 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;
}

input[type="file"].conference-form-control {
    padding: 9px 12px;
    background: #ffffff;
    border: 1px dashed var(--border-color);
    cursor: pointer;
}

input[type="file"].conference-form-control:hover {
    border-color: var(--primary-color);
    background: var(--input-bg);
}

textarea.conference-form-control {
    resize: vertical;
    min-height: 100px;
}

/* Checkboxes */
.cf-checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    line-height: 1.5;
    color: var(--text-main);
    font-size: 0.95rem;
}

.cf-checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-top: 3px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

/* Captcha Block */
#captchaMath {
    background: linear-gradient(135deg, rgba(141, 16, 118, 0.1), rgba(197, 138, 34, 0.1)) !important;
    border: 1px solid rgba(141, 16, 118, 0.2) !important;
    color: var(--primary-color) !important;
    padding: 10px 20px !important;
    border-radius: var(--input-radius) !important;
    font-size: 1.2rem !important;
    letter-spacing: 2px;
}

#refreshCaptchaBtn {
    background: var(--bg-color) !important;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

#refreshCaptchaBtn:hover {
    background: rgba(141, 16, 118, 0.1) !important;
    transform: rotate(30deg);
}

/* Submit Button */
.conference-btn-submit {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: #ffffff;
    font-weight: 600;
    font-size: 1.1rem;
    letter-spacing: 0.5px;
    border: none;
    padding: 14px 45px !important;
    border-radius: 30px !important;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(141, 16, 118, 0.3);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.conference-btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    background: linear-gradient(135deg, var(--primary-hover), var(--primary-color));
}

.conference-btn-submit:active {
    transform: translateY(1px);
    box-shadow: 0 2px 8px rgba(141, 16, 118, 0.3);
}

.conference-btn-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Custom Animation */
@keyframes slideUpFade {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.conference-card {
    animation: slideUpFade 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.conference-card:nth-child(1) {
    animation-delay: 0.1s;
}

.conference-card:nth-child(2) {
    animation-delay: 0.2s;
}

.conference-card:nth-child(3) {
    animation-delay: 0.3s;
}

.conference-card:nth-child(4) {
    animation-delay: 0.4s;
}

.conference-card:nth-child(5) {
    animation-delay: 0.5s;
}

.conference-card:nth-child(6) {
    animation-delay: 0.6s;
}

.conference-card:nth-child(7) {
    animation-delay: 0.7s;
}

.pkp_structure_main h5,
.pkp_structure_main h6 {
    margin: 0 !important;
}
/* =========================================================
   MULTI-STEP WIZARD & VALIDATION STYLES
========================================================= */

/* Step Progress Indicator */
.step-progress-wrapper {
    margin-bottom: 30px;
    padding: 0 20px;
}
.step-progress {
    display: flex;
    justify-content: space-between;
    position: relative;
    max-width: 100%;
    margin: 0 auto;
}
.step-progress::before {
    content: "";
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: 0;
    right: 0;
    height: 4px;
    background: var(--border-color);
    z-index: 1;
}
.step-progress-bar {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: 0;
    height: 4px;
    background: var(--primary-color);
    z-index: 2;
    transition: width 0.4s ease;
    width: 0%; /* updated by JS */
}
.step-indicator {
    position: relative;
    z-index: 3;
    background: var(--card-bg);
    border: 3px solid var(--border-color);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--text-muted);
    transition: var(--transition);
}
.step-indicator.active {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: #fff;
    box-shadow: 0 0 0 5px rgba(141, 16, 118, 0.15);
}
.step-indicator.completed {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: #fff;
}

/* Step Content Wrappers */
.step-content {
    display: none;
    animation: fadeIn 0.4s ease-in-out;
}
.step-content.active {
    display: block;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Step Navigation Actions */
.step-actions {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
}
.btn-prev, .btn-next {
    padding: 12px 30px;
    border: none;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1.05rem;
    cursor: pointer;
    transition: var(--transition);
}
.btn-prev {
    background: #e2e8f0;
    color: var(--text-main);
}
.btn-prev:hover {
    background: #cbd5e1;
}
.btn-next {
    background: var(--primary-color);
    color: #fff;
}
.btn-next:hover {
    background: var(--primary-hover);
    box-shadow: 0 4px 10px rgba(141, 16, 118, 0.2);
}

/* Validation Styles (jQuery Validate) */
.conference-form-control.error {
    border-color: var(--danger);
    background-color: #fff5f5;
}
.conference-form-control.error:focus {
    box-shadow: 0 0 0 4px rgba(231, 76, 60, 0.15);
}
label.error {
    color: var(--danger);
    font-size: 0.85rem;
    font-weight: 500;
    display: block;
    margin-top: 5px;
    animation: fadeIn 0.2s;
}