/* === Root Variables & Theme === */
:root {
    /* Primary Colors */
    --primary-color: #1a5f7a;
    --primary-dark: #0d3b4f;
    --primary-light: #2a8baa;
    --success-color: #28a745;
    --success-dark: #1e7e34;
    --error-color: #d32f2f;
    --warning-color: #ff9800;
    
    /* Neutral Colors */
    --text-color: #2c3e50;
    --text-light: #5a6b7a;
    --bg-color: #f8f9fa;
    --bg-light: #fafbfc;
    --bg-card: #ffffff;
    --border-color: #e2e8f0;
    --border-light: #e9edf2;
    
    /* Spacing */
    --spacing-xs: 6px;
    --spacing-sm: 12px;
    --spacing-md: 20px;
    --spacing-lg: 40px;
    
    /* Effects */
    --border-radius: 0px;
    --border-radius-lg: 0px;
    --transition: 0.3s ease;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.1), 0 5px 20px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.15);
    --shadow-color: rgba(26, 95, 122, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Tajawal', 'Segoe UI', Arial, sans-serif;
    background: linear-gradient(135deg, #e8f0fe 0%, #d4e4f7 100%);
    min-height: 100vh;
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
}

/* === Container === */
.registration-wrapper,
.survey-container,
.form-container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

#regForm,
.survey-container {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg) 45px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
    animation: fadeIn 0.6s ease;
}

#regForm::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light), var(--success-color));
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* === Header & Logo === */
.header-section,
.logo {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-light);
}

.logo-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 15px;
}

.logo-img {
    max-height: 80px;
    width: auto;
    object-fit: contain;
    transition: transform var(--transition);
}

.logo-img:hover {
    transform: scale(1.05);
}

/* === Titles === */
.event-title,
.survey-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin: 10px 0 5px;
    letter-spacing: 0.5px;
}

.event-meta {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    font-size: 0.95rem;
    color: var(--text-light);
    margin-top: var(--spacing-xs);
}

.event-meta i {
    color: var(--primary-color);
    margin-inline-end: 8px;
}

.event-meta span {
    padding: 5px 15px;
}

.event-description {
    padding: 15px 20px;
    color: var(--text-color);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-top: 10px;
}

.tab-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-md);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 10px;
}

.tab-title i {
    color: var(--primary-color);
}

/* === Progress Indicator === */
.steps-container,
.progress-indicator {
    text-align: center;
    margin: var(--spacing-md) 0;
    padding: 10px 0;
}

.step,
.step-dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    margin: 0 6px;
    border-radius: 50%;
    background: var(--border-light);
    transition: all var(--transition);
    border: 2px solid transparent;
}

.step.active,
.step-dot.active {
    background: var(--primary-color);
    border-color: var(--primary-light);
    transform: scale(1.3);
    box-shadow: 0 0 20px var(--shadow-color);
}

.step.finish,
.step-dot.finish {
    background: var(--success-color);
    border-color: var(--success-dark);
}

/* === Tabs === */
.tab {
    display: none;
    animation: fadeIn 0.5s ease;
    padding: 10px 5px;
}

.tab.active-tab {
    display: block;
}

/* === Form Elements === */
.survey-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.question,
.form-group {
    margin-bottom: var(--spacing-md);
}

.question label,
.form-group label {
    display: block;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
    cursor: pointer;
}

/* === Input Elements === */
.question input,
.question select,
.question textarea,
.form-control,
.search-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all var(--transition);
    background: var(--bg-light);
    font-family: inherit;
    min-height: 56px;
}

.question input:focus,
.question select:focus,
.question textarea:focus,
.form-control:focus,
.search-input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 4px rgba(26, 95, 122, 0.1);
    background: var(--bg-card);
}

.form-control.invalid,
.input-error {
    border-color: var(--error-color) !important;
    background: #fff5f5;
    box-shadow: 0 0 0 4px rgba(220, 53, 69, 0.1);
}

.error-message {
    color: var(--error-color);
    font-size: 14px;
    margin-top: 5px;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%235a6b7a' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: calc(100% - 15px) center;
    padding-inline-end: 40px;
}

[dir="rtl"] select.form-control {
    background-position: 15px center;
    padding-inline-end: 16px;
    padding-inline-start: 40px;
}

/* === Radio & Checkbox === */
input[type="radio"],
input[type="checkbox"] {
    appearance: none;
    width: 18px;
    height: 18px;
    margin-inline-end: 10px;
    border: 2px solid var(--border-color);
    border-radius: 0px;
    background: #fff;
    cursor: pointer;
    position: relative;
    transition: all var(--transition);
    vertical-align: middle;
    accent-color: var(--primary-color);
    -webkit-border-radius: 0px;
    -moz-border-radius: 0px;
    -ms-border-radius: 0px;
    -o-border-radius: 0px;
}

input[type="radio"] {
    border-radius: 50%;
}

input[type="checkbox"]:checked,
input[type="radio"]:checked {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

input[type="checkbox"]:checked::after {
    content: '✓';
    color: #fff;
    font-size: 13px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

input[type="radio"]:checked::after {
    content: '';
    width: 8px;
    height: 8px;
    background: #fff;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.checkbox-group {
    background: var(--bg-color);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 2px solid var(--border-color);
}

/* === Buttons === */
.btn-group,
.buttons-container {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    margin-top: 30px;
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--border-light);
}

[dir="rtl"] .btn-group {
    justify-content: flex-start;
}

button,
.btn {
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-width: 120px;
    border-radius: 0 !important;
}

button:hover,
.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

button:focus-visible {
    outline: 3px solid var(--primary-color);
}

.btn-primary,
.submit-btn {
    background: var(--primary-color);
    color: #fff;
}

.btn-success,
.next-btn,
.save-btn {
    background: var(--success-color);
    color: #fff;
}

.btn-secondary,
.previous-btn {
    background: var(--border-light);
    color: var(--text-light);
}

.btn-success:hover,
.next-btn:hover,
.save-btn:hover {
    background: #239848;
}

.btn-primary:hover,
.submit-btn:hover {
    background: #4375c7;
}

.btn:disabled,
button.loading {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

button.loading::after {
    content: '';
    width: 18px;
    height: 18px;
    border: 2px solid transparent;
    border-top: 2px solid #fff;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -9px 0 0 -9px;
    animation: spin 1s linear infinite;
}

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

/* === Alerts === */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin: var(--spacing-md) 0;
    text-align: center;
}

.alert-success {
    background: #d4edda;
    border: 2px solid #c3e6cb;
    color: #155724;
}

.alert-warning {
    background: #fff3cd;
    border: 2px solid #ffeaa7;
    color: #856404;
}

.alert a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.alert a:hover {
    text-decoration: underline;
}

/* === Misc === */
div.option {
    padding: 8px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
}

div.option:hover {
    transform: translateY(-4px);
    transition: transform var(--transition);
}

/* === RTL Support === */
[dir="rtl"],
.rtl {
    direction: rtl;
    text-align: right;
}

[dir="rtl"] .question label,
.rtl .question label {
    text-align: right;
}

[dir="rtl"] .survey-title,
.rtl .survey-title {
    text-align: center;
}

[dir="rtl"] input,
[dir="rtl"] select,
[dir="rtl"] textarea,
.rtl input,
.rtl select,
.rtl textarea {
    text-align: right;
}

[dir="rtl"] .btn-group,
.rtl .buttons-container {
    flex-direction: row-reverse;
}

[dir="rtl"] .steps-container,
.rtl .steps-container {
    direction: rtl;
}

/* === Dark Mode === */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1e1e1e;
        --bg-card: rgba(45, 45, 45, 0.95);
        --bg-light: #2d2d2d;
        --border-color: #555;
        --border-light: #444;
        --text-color: #eee;
        --text-light: #aaa;
    }

    body {
        background: #1e1e1e;
    }

    .question input,
    .question select,
    .question textarea,
    .form-control {
        background: var(--bg-light);
        border-color: var(--border-color);
        color: #fff;
    }

    .question label {
        color: #a0c4ff;
    }
}

/* === Responsive === */
@media (max-width: 768px) {
    #regForm,
    .survey-container {
        padding: var(--spacing-md) var(--spacing-md);
    }

    .event-title,
    .survey-title {
        font-size: 24px;
    }

    .btn-group,
    .buttons-container {
        justify-content: center;
    }

    button,
    .btn {
        width: 100%;
        justify-content: center;
    }

    .logo-wrapper {
        flex-direction: column;
        gap: 10px;
    }

    .logo-img {
        max-height: 60px;
    }
}

@media (max-width: 480px) {
    #regForm,
    .survey-container {
        padding: var(--spacing-sm);
    }

    .event-title,
    .survey-title {
        font-size: 20px;
    }

    .form-control {
        padding: 10px 14px;
        font-size: 0.9rem;
    }

    button,
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .question label {
        font-size: 15px;
    }
}

/* === Print Mode === */
@media print {
    body {
        background: white !important;
    }

    #regForm,
    .survey-container {
        box-shadow: none;
        border: none;
        background: white;
    }

    button,
    .btn,
    .logo {
        display: none !important;
    }
}