/* ==========================================================================
   College Affiliation Registration — Pure CSS System (Zero-JS UI)
   ========================================================================== */

:root {
    --col-primary: #1e40af;
    --col-primary-hover: #1d4ed8;
    --col-primary-light: #eff6ff;
    --col-primary-border: #bfdbfe;
    --col-accent: #0284c7;
    --col-dark: #0f172a;
    --col-text-muted: #64748b;
    --col-surface: #ffffff;
    --col-bg: #f8fafc;
    --col-border: #e2e8f0;
    --col-danger: #dc2626;
    --col-danger-bg: #fef2f2;
    --col-danger-border: #fecaca;
    --col-success: #16a34a;
    --col-success-bg: #f0fdf4;
    --col-success-border: #bbf7d0;
    --col-radius: 12px;
    --col-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --col-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
}

.col-reg-wrapper {
    background-color: var(--col-bg);
    min-height: calc(100vh - 120px);
    padding: 2.5rem 1rem 4rem 1rem;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    overflow-x: hidden;
    width: 100%;
    box-sizing: border-box;
}

.col-reg-container {
    max-width: 1140px;
    width: 100%;
    margin: 0 auto;
    min-width: 0;
    box-sizing: border-box;
}

/* ── Hero Banner ── */
.col-reg-hero {
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #0369a1 100%);
    color: #ffffff;
    padding: 2.5rem 2rem;
    border-radius: var(--col-radius);
    box-shadow: var(--col-shadow-lg);
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
}

.col-reg-hero::after {
    content: "";
    position: absolute;
    right: -40px;
    bottom: -40px;
    width: 220px;
    height: 220px;
    background: radial-gradient(circle, rgba(255,255,255,0.12) 0%, rgba(255,255,255,0) 70%);
    border-radius: 50%;
    pointer-events: none;
}

.col-reg-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    padding: 0.35rem 0.85rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.col-reg-hero-title {
    font-size: 1.85rem;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.col-reg-hero-subtitle {
    font-size: 0.95rem;
    opacity: 0.9;
    max-width: 650px;
    margin-bottom: 0;
    line-height: 1.5;
}

/* ── Cards / Sections ── */
.col-reg-section-card {
    background: var(--col-surface);
    border: 1px solid var(--col-border);
    border-radius: var(--col-radius);
    box-shadow: var(--col-shadow);
    padding: 1.75rem;
    margin-bottom: 1.75rem;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
    overflow-wrap: break-word;
}

.col-reg-section-card:hover {
    box-shadow: var(--col-shadow-lg);
}

.col-reg-section-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--col-border);
}

.col-reg-section-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--col-primary-light);
    color: var(--col-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    flex-shrink: 0;
    border: 1px solid var(--col-primary-border);
}

.col-reg-section-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--col-dark);
    margin-bottom: 0.2rem;
}

.col-reg-section-desc {
    font-size: 0.85rem;
    color: var(--col-text-muted);
    margin-bottom: 0;
}

/* ── Form Controls & Floating Grid ── */
.col-reg-form-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
    min-width: 0;
    max-width: 100%;
}

.col-reg-form-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
    min-width: 0;
    max-width: 100%;
}

.col-span-full {
    grid-column: 1 / -1;
    min-width: 0;
    max-width: 100%;
}

.col-reg-form-grid > *,
.col-reg-form-grid-2 > *,
.col-reg-field {
    display: flex;
    flex-direction: column;
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
}

.col-reg-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: #334155;
    margin-bottom: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.col-reg-required {
    color: var(--col-danger);
    font-weight: bold;
}

.col-reg-input,
.col-reg-select,
.col-reg-textarea {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
    padding: 0.65rem 0.85rem;
    font-size: 0.92rem;
    border: 1.5px solid var(--col-border);
    border-radius: 8px;
    background-color: #ffffff;
    color: #1e293b;
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.col-reg-input:focus,
.col-reg-select:focus,
.col-reg-textarea:focus {
    border-color: var(--col-primary);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.15);
}

.col-reg-input::placeholder,
.col-reg-textarea::placeholder {
    color: #94a3b8;
}

.col-reg-textarea {
    resize: vertical;
    min-height: 85px;
}

/* Validation Errors */
.input-validation-error,
.is-invalid {
    border-color: var(--col-danger) !important;
    background-color: var(--col-danger-bg) !important;
}

.col-reg-checkbox.input-validation-error,
.col-reg-checkbox.is-invalid {
    outline: 2px solid var(--col-danger) !important;
    outline-offset: 2px;
}

.field-validation-error:empty {
    display: none !important;
}

.field-validation-error:not(:empty) {
    color: var(--col-danger);
    font-size: 0.78rem;
    margin-top: 0.35rem;
    font-weight: 500;
    display: block;
    word-break: break-word;
    overflow-wrap: anywhere;
    white-space: normal;
    max-width: 100%;
    min-width: 0;
    line-height: 1.4;
}

.field-validation-error:not(:empty)::before {
    content: "⚠️ ";
    font-size: 0.75rem;
    margin-right: 0.25rem;
}

/* ── Inline State Action Bar (Server-side district load) ── */
.col-reg-state-group {
    display: flex;
    gap: 0.5rem;
    align-items: stretch;
}

.col-reg-btn-reload {
    background-color: #f1f5f9;
    border: 1.5px solid var(--col-border);
    color: #475569;
    border-radius: 8px;
    padding: 0 0.85rem;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    white-space: nowrap;
    transition: background-color 0.15s, color 0.15s;
}

.col-reg-btn-reload:hover {
    background-color: #e2e8f0;
    color: #1e293b;
}

/* ── Document Upload Card ── */
.col-reg-upload-box {
    border: 2px dashed #cbd5e1;
    border-radius: 10px;
    padding: 1.25rem;
    background-color: #f8fafc;
    text-align: center;
    transition: border-color 0.15s, background-color 0.15s;
}

.col-reg-upload-box:hover {
    border-color: var(--col-primary);
    background-color: #f0f7ff;
}

.col-reg-upload-icon {
    font-size: 2rem;
    color: #dc2626;
    margin-bottom: 0.5rem;
}

.col-reg-upload-note {
    font-size: 0.78rem;
    color: var(--col-text-muted);
    margin-top: 0.35rem;
}

/* ── Fee Details Table ── */
.col-reg-fee-card {
    background: #ffffff;
    border: 1px solid var(--col-border);
    border-radius: 10px;
    overflow-x: auto;
    max-width: 100%;
}

.col-reg-fee-table {
    width: 100%;
    border-collapse: collapse;
}

.col-reg-fee-table th {
    background: #f8fafc;
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #64748b;
    border-bottom: 1px solid var(--col-border);
}

.col-reg-fee-table td {
    padding: 0.85rem 1rem;
    font-size: 0.9rem;
    color: #1e293b;
    border-bottom: 1px solid var(--col-border);
}

.col-reg-badge-pending {
    background: #fef3c7;
    color: #92400e;
    padding: 0.25rem 0.6rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.col-reg-fee-total {
    background: #f8fafc;
    padding: 1rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--col-border);
}

.col-reg-fee-amount {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--col-primary);
}

/* ── Declaration & Submit Actions ── */
.col-reg-declaration-card {
    background: #f8fafc;
    border: 1px solid #cbd5e1;
    border-radius: var(--col-radius);
    padding: 1.25rem 1.5rem;
    margin-bottom: 2rem;
}

.col-reg-checkbox-wrap {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
}

.col-reg-checkbox {
    width: 20px;
    height: 20px;
    margin-top: 0.15rem;
    cursor: pointer;
    accent-color: var(--col-primary);
}

.col-reg-declaration-text {
    font-size: 0.88rem;
    color: #334155;
    line-height: 1.5;
    margin-bottom: 0;
}

.col-reg-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 1rem;
    padding-top: 1rem;
}

.col-reg-btn-submit {
    background-color: var(--col-primary);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    padding: 0.75rem 2rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(30, 64, 175, 0.25);
    transition: background-color 0.15s ease, transform 0.15s ease;
}

.col-reg-btn-submit:hover {
    background-color: var(--col-primary-hover);
    transform: translateY(-1px);
}

.col-reg-btn-reset {
    background-color: #ffffff;
    color: #64748b;
    border: 1.5px solid var(--col-border);
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.15s, color 0.15s;
}

.col-reg-btn-reset:hover {
    background-color: #f1f5f9;
    color: #1e293b;
}

/* ── Responsive Queries ── */
@media (max-width: 992px) {
    .col-reg-form-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .col-reg-form-grid,
    .col-reg-form-grid-2 {
        grid-template-columns: minmax(0, 1fr);
    }
    .col-reg-hero-title {
        font-size: 1.4rem;
    }
    .col-reg-actions {
        flex-direction: column-reverse;
        align-items: stretch;
    }
    .col-reg-btn-submit,
    .col-reg-btn-reset {
        width: 100%;
        justify-content: center;
    }
}

/* ── Multi-Document Uploads Table ── */
.col-reg-docs-container {
    background: #ffffff;
    border: 1px solid var(--col-border);
    border-radius: 10px;
    padding: 1.25rem;
    overflow-x: auto;
    max-width: 100%;
}

.col-reg-docs-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.col-reg-docs-table thead th {
    background-color: #f8fafc;
    color: #475569;
    font-size: 0.825rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.75rem 1rem;
    border-bottom: 2px solid var(--col-border);
}

.col-reg-docs-table tbody td {
    padding: 0.85rem 0.75rem;
    border-bottom: 1px solid var(--col-border);
    vertical-align: top;
}

.col-reg-docs-table tbody tr:last-child td {
    border-bottom: none;
}

.col-reg-docs-table .col-reg-select,
.col-reg-docs-table .col-reg-file-input {
    height: 44px;
    margin: 0;
    box-sizing: border-box;
}

.col-reg-docs-table .doc-index-num {
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    font-weight: 600;
    color: #64748b;
}

.col-reg-file-input {
    padding: 0.45rem 0.75rem;
    cursor: pointer;
    background-color: #ffffff;
    display: flex;
    align-items: center;
}

.col-reg-file-input::file-selector-button {
    padding: 0.35rem 0.85rem;
    border-radius: 6px;
    border: 1px solid #cbd5e1;
    background-color: #f8fafc;
    color: #334155;
    font-size: 0.85rem;
    font-weight: 500;
    margin-right: 0.75rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.col-reg-file-input::file-selector-button:hover {
    background-color: #e2e8f0;
    color: #0f172a;
}

.doc-remove-btn {
    border-radius: 8px;
    width: 44px;
    height: 44px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: all 0.15s ease;
}

/* ── Fullscreen Submit Loading Overlay ── */
.col-reg-loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(15, 23, 42, 0.65);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 99999;
}

.col-reg-loading-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 2.5rem 2rem;
    max-width: 480px;
    width: 90%;
    text-align: center;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    animation: colRegPopIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.col-reg-spinner {
    width: 3.5rem;
    height: 3.5rem;
    border-width: 0.3em;
}

@keyframes colRegPopIn {
    from {
        opacity: 0;
        transform: scale(0.92);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}