/* ═══════════════════════════════════════════
   IRiBS Survey Frontend v2.0 – Polished
   ═══════════════════════════════════════════ */

:root {
    --iribs-orange: #FF4600;
    --iribs-orange-light: #FFF3E0;
    --iribs-orange-hover: #FFE0B2;
    --iribs-orange-dark: #CC3800;
    --iribs-text: #1a1a1a;
    --iribs-text-secondary: #555;
    --iribs-text-muted: #888;
    --iribs-border: #ddd;
    --iribs-border-light: #eee;
    --iribs-bg: #f8f9fa;
    --iribs-white: #FFFFFF;
    --iribs-error: #D32F2F;
    --iribs-error-bg: #FFEBEE;
    --iribs-success: #2E7D32;
    --iribs-success-bg: #E8F5E9;
    --iribs-radius: 16px;
    --iribs-radius-md: 12px;
    --iribs-radius-sm: 8px;
    --iribs-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --iribs-shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --iribs-shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
    --iribs-transition: 0.2s ease;
}

/* Reset within our container */
.iribs-survey-wrap,
.iribs-survey-wrap * {
    box-sizing: border-box;
}

.iribs-survey-wrap {
    max-width: 820px;
    margin: 32px auto;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--iribs-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ── Header ── */
.iribs-survey-header {
    text-align: center;
    padding: 48px 32px 36px;
    background: linear-gradient(180deg, var(--iribs-white) 0%, var(--iribs-bg) 100%);
    border-radius: var(--iribs-radius) var(--iribs-radius) 0 0;
    border: 1px solid var(--iribs-border);
    border-bottom: none;
    position: relative;
}

.iribs-logo {
    margin-bottom: 20px;
    display: inline-block;
}

.iribs-logo svg {
    max-width: 160px;
    height: auto;
}

.iribs-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--iribs-text);
    margin: 0 0 8px 0;
    padding: 0;
    line-height: 1.35;
    letter-spacing: -0.01em;
}

.iribs-subtitle {
    font-size: 14px;
    color: var(--iribs-text-secondary);
    margin: 0 0 28px 0;
    padding: 0;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* ── Progress bar ── */
.iribs-progress-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 360px;
    margin: 0 auto;
}

.iribs-progress-bar {
    flex: 1;
    height: 5px;
    background: var(--iribs-border);
    border-radius: 3px;
    overflow: hidden;
}

.iribs-progress-fill {
    height: 100%;
    background: var(--iribs-orange);
    border-radius: 3px;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.iribs-progress-text {
    font-size: 12px;
    font-weight: 600;
    color: var(--iribs-text-muted);
    white-space: nowrap;
    min-width: 46px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* ── Form ── */
.iribs-survey-form {
    background: var(--iribs-white);
    border: 1px solid var(--iribs-border);
    border-top: none;
    padding: 0 0 32px;
}

/* ── Question block ── */
.iribs-question {
    padding: 28px 32px;
    border-top: 1px solid var(--iribs-border-light);
    transition: background var(--iribs-transition);
    position: relative;
}

.iribs-question:first-child {
    border-top: 1px solid var(--iribs-border);
}

.iribs-question.iribs-focused {
    background: var(--iribs-bg);
}

.iribs-question.iribs-has-error {
    background: var(--iribs-error-bg);
}

.iribs-question.iribs-answered {
    border-left: 3px solid var(--iribs-orange);
}

.iribs-question-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--iribs-orange);
    color: var(--iribs-white);
    font-size: 12px;
    font-weight: 700;
    margin: 0 0 10px 0;
    padding: 0;
    flex-shrink: 0;
}

.iribs-question.iribs-answered .iribs-question-number {
    background: var(--iribs-success);
}

.iribs-question-label {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--iribs-text);
    margin: 0 0 14px 0;
    padding: 0;
    line-height: 1.5;
    cursor: default;
}

.iribs-required {
    color: var(--iribs-orange);
    margin-left: 2px;
    font-weight: 700;
}

.iribs-question-input {
    margin-top: 4px;
}

/* ── Radio ── */
.iribs-radio-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.iribs-radio-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border: 1.5px solid var(--iribs-border);
    border-radius: var(--iribs-radius-sm);
    cursor: pointer;
    transition: all var(--iribs-transition);
    background: var(--iribs-white);
    user-select: none;
    -webkit-user-select: none;
}

.iribs-radio-item:hover {
    border-color: var(--iribs-orange);
    background: var(--iribs-orange-light);
}

.iribs-radio-item input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
}

.iribs-radio-mark {
    width: 18px;
    height: 18px;
    min-width: 18px;
    border: 2px solid var(--iribs-border);
    border-radius: 50%;
    position: relative;
    transition: all var(--iribs-transition);
    flex-shrink: 0;
}

.iribs-radio-item input:checked + .iribs-radio-mark {
    border-color: var(--iribs-orange);
    border-width: 2px;
}

.iribs-radio-item input:checked + .iribs-radio-mark::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--iribs-orange);
}

.iribs-radio-item input:checked ~ .iribs-radio-label {
    font-weight: 600;
    color: var(--iribs-orange-dark);
}

.iribs-radio-item:has(input:checked) {
    border-color: var(--iribs-orange);
    background: var(--iribs-orange-light);
}

.iribs-radio-label {
    font-size: 14px;
    color: var(--iribs-text);
    line-height: 1.4;
}

/* Scale group (5-point) – horizontal on desktop */
.iribs-scale-group {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
}

.iribs-scale-group .iribs-radio-item {
    flex: 1 1 auto;
    min-width: 110px;
    justify-content: flex-start;
    padding: 10px 12px;
}

.iribs-scale-group .iribs-radio-label {
    font-size: 13px;
}

/* ── Checkbox ── */
.iribs-checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.iribs-checkbox-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border: 1.5px solid var(--iribs-border);
    border-radius: var(--iribs-radius-sm);
    cursor: pointer;
    transition: all var(--iribs-transition);
    background: var(--iribs-white);
    user-select: none;
    -webkit-user-select: none;
}

.iribs-checkbox-item:hover {
    border-color: var(--iribs-orange);
    background: var(--iribs-orange-light);
}

.iribs-checkbox-item input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
}

.iribs-checkbox-mark {
    width: 18px;
    height: 18px;
    min-width: 18px;
    border: 2px solid var(--iribs-border);
    border-radius: 4px;
    position: relative;
    transition: all var(--iribs-transition);
    flex-shrink: 0;
}

.iribs-checkbox-item input:checked + .iribs-checkbox-mark {
    background: var(--iribs-orange);
    border-color: var(--iribs-orange);
}

.iribs-checkbox-item input:checked + .iribs-checkbox-mark::after {
    content: '';
    position: absolute;
    top: 1px;
    left: 4px;
    width: 6px;
    height: 10px;
    border: solid var(--iribs-white);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.iribs-checkbox-item:has(input:checked) {
    border-color: var(--iribs-orange);
    background: var(--iribs-orange-light);
}

.iribs-checkbox-label {
    font-size: 14px;
    color: var(--iribs-text);
    line-height: 1.4;
}

/* ── Text & Email inputs ── */
.iribs-text-input {
    width: 100%;
    padding: 12px 14px;
    font-size: 15px;
    border: 1.5px solid var(--iribs-border);
    border-radius: var(--iribs-radius-sm);
    outline: none;
    transition: border-color var(--iribs-transition), box-shadow var(--iribs-transition);
    font-family: inherit;
    background: var(--iribs-white);
    color: var(--iribs-text);
    margin: 0;
}

.iribs-text-input:focus {
    border-color: var(--iribs-orange);
}

.iribs-text-input::placeholder {
    color: var(--iribs-text-muted);
}

/* ── Textarea ── */
.iribs-textarea {
    width: 100%;
    padding: 12px 14px;
    font-size: 15px;
    border: 1.5px solid var(--iribs-border);
    border-radius: var(--iribs-radius-sm);
    outline: none;
    transition: border-color var(--iribs-transition), box-shadow var(--iribs-transition);
    font-family: inherit;
    resize: vertical;
    min-height: 90px;
    background: var(--iribs-white);
    color: var(--iribs-text);
    margin: 0;
}

.iribs-textarea:focus {
    border-color: var(--iribs-orange);
}

.iribs-textarea::placeholder {
    color: var(--iribs-text-muted);
}

/* ── Conditional (hidden) ── */
.iribs-hidden {
    display: none !important;
}

/* ── Field errors ── */
.iribs-field-error {
    color: var(--iribs-error);
    font-size: 13px;
    font-weight: 500;
    margin-top: 8px;
    min-height: 0;
    padding: 0;
}

.iribs-field-error:empty {
    display: none;
}

/* ── Submit ── */
.iribs-form-actions {
    padding: 36px 32px 0;
    text-align: center;
}

.iribs-submit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 40px;
    font-size: 16px;
    font-weight: 700;
    color: var(--iribs-white);
    background: var(--iribs-orange);
    border: none;
    border-radius: var(--iribs-radius-md);
    cursor: pointer;
    transition: all var(--iribs-transition);
    min-width: 200px;
    font-family: inherit;
    letter-spacing: 0.01em;
    line-height: 1.4;
    margin: 0;
}

.iribs-submit-btn:hover {
    background: var(--iribs-orange-dark);
    transform: translateY(-1px);
}

.iribs-submit-btn:active {
    transform: translateY(0);
}

.iribs-submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.iribs-btn-spinner {
    display: inline-flex;
    align-items: center;
}

.iribs-btn-spinner svg {
    animation: iribs-spin 1s linear infinite;
}

@keyframes iribs-spin {
    100% { transform: rotate(360deg); }
}

/* ── Global error ── */
.iribs-global-error {
    margin: 20px 32px 0;
    padding: 14px 18px;
    background: var(--iribs-error-bg);
    color: var(--iribs-error);
    border: 1px solid #FFCDD2;
    border-radius: var(--iribs-radius-sm);
    font-size: 14px;
    font-weight: 500;
    text-align: center;
}

/* ── Error screen ── */
.iribs-error {
    max-width: 820px;
    margin: 32px auto;
    padding: 48px 32px;
    text-align: center;
    background: var(--iribs-white);
    border: 1px solid var(--iribs-border);
    border-radius: var(--iribs-radius);
    color: var(--iribs-text);
    font-size: 15px;
    box-shadow: var(--iribs-shadow);
}

.iribs-error::before {
    content: '';
    display: block;
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    background: var(--iribs-error-bg);
    border-radius: 50%;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23D32F2F' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cline x1='12' y1='8' x2='12' y2='12'/%3E%3Cline x1='12' y1='16' x2='12.01' y2='16'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 24px;
}

/* ── Success screen ── */
.iribs-success {
    text-align: center;
    padding: 64px 32px;
    background: var(--iribs-white);
    border: 1px solid var(--iribs-border);
    border-radius: var(--iribs-radius);
    box-shadow: var(--iribs-shadow-md);
}

.iribs-success-icon {
    margin: 0 0 20px 0;
    padding: 0;
}

.iribs-success-icon svg {
    filter: drop-shadow(0 2px 8px rgba(46, 125, 50, 0.25));
}

.iribs-success-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--iribs-success);
    margin: 0 0 8px 0;
    padding: 0;
}

.iribs-success-text {
    font-size: 15px;
    color: var(--iribs-text-secondary);
    margin: 0;
    padding: 0;
}

/* ── Footer ── */
.iribs-footer {
    text-align: center;
    padding: 20px 0 0;
}

.iribs-footer p {
    font-size: 12px;
    color: var(--iribs-text-muted);
    margin: 0;
    padding: 0;
}

/* ═══════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════ */

@media (max-width: 768px) {
    .iribs-survey-wrap {
        margin: 12px;
    }

    .iribs-survey-header {
        padding: 32px 20px 28px;
    }

    .iribs-title {
        font-size: 20px;
    }

    .iribs-subtitle {
        font-size: 13px;
    }

    .iribs-question {
        padding: 22px 20px;
    }

    .iribs-question.iribs-answered {
        border-left-width: 3px;
    }

    .iribs-scale-group {
        flex-direction: column;
    }

    .iribs-scale-group .iribs-radio-item {
        min-width: auto;
    }

    .iribs-form-actions {
        padding: 28px 20px 0;
    }

    .iribs-submit-btn {
        width: 100%;
        padding: 14px 24px;
    }

    .iribs-global-error {
        margin: 16px 20px 0;
    }

    .iribs-radio-item,
    .iribs-checkbox-item {
        padding: 10px 12px;
    }

    .iribs-text-input,
    .iribs-textarea {
        padding: 11px 12px;
        font-size: 16px; /* Prevents iOS zoom on focus */
    }
}

@media (max-width: 480px) {
    .iribs-survey-wrap {
        margin: 8px;
    }

    .iribs-survey-header {
        padding: 24px 16px 20px;
    }

    .iribs-title {
        font-size: 18px;
    }

    .iribs-question {
        padding: 18px 16px;
    }

    .iribs-form-actions {
        padding: 24px 16px 0;
    }

    .iribs-global-error {
        margin: 12px 16px 0;
    }
}