/* ============================================
   Flow Communications - Document Signing Portal
   ============================================ */

/* --- Reset & Base --- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-primary: #1a365d;
    --color-primary-light: #2a4a7f;
    --color-primary-dark: #0f2440;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-success: #16a34a;
    --color-success-bg: #f0fdf4;
    --color-success-border: #bbf7d0;
    --color-error: #dc2626;
    --color-error-bg: #fef2f2;
    --color-error-border: #fecaca;
    --color-warning: #d97706;
    --color-warning-bg: #fffbeb;
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-light: #94a3b8;
    --color-border: #e2e8f0;
    --color-bg: #f8fafc;
    --color-bg-white: #ffffff;
    --color-surface: #ffffff;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-paper: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --max-width: 1000px;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
    padding: 0 !important;
    margin: 0 !important;
}

/* --- Logo Bar --- */
.logo-bar {
    text-align: center;
    padding: 24px 20px 8px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.logo-img {
    height: 50px;
    max-height: 50px;
    width: auto;
}

/* --- Main Content --- */
.app-main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px 24px;
}

/* --- Views --- */
.view {
    display: none;
}

.view.active {
    display: block;
}

/* --- Loading View --- */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    gap: 20px;
}

.loading-text {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

/* --- Spinner --- */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.spinner-white {
    border-color: rgba(255, 255, 255, 0.3);
    border-top-color: white;
}

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

/* --- Document Meta --- */
.document-meta {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    margin: 24px 0 20px;
    box-shadow: var(--shadow-sm);
}

.meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.meta-label {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-light);
}

.meta-value {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text);
}

.meta-value-highlight {
    color: var(--color-accent);
}

/* --- Section Navigation --- */
.section-nav {
    display: none;
}

.section-nav.active {
    display: block;
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
}

.section-nav-header {
    padding: 12px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.section-nav-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
}

.section-nav-chevron {
    color: var(--color-text-secondary);
    transition: transform 0.2s;
}

.section-nav.open .section-nav-chevron {
    transform: rotate(180deg);
}

.section-nav-list {
    display: none;
    list-style: none;
    padding: 0 8px 12px;
    margin: 0;
    border-top: 1px solid var(--color-border);
}

.section-nav.open .section-nav-list {
    display: block;
}

.section-nav-list li {
    margin: 0;
}

.section-nav-list a {
    display: block;
    padding: 6px 12px;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    border-left: 2px solid transparent;
    transition: all 0.15s;
}

.section-nav-list a:hover {
    color: var(--color-text);
    background: var(--color-bg);
}

.section-nav-list a.active {
    color: var(--color-accent);
    border-left-color: var(--color-accent);
    background: rgba(37, 99, 235, 0.05);
    font-weight: 500;
}

/* --- Document Container --- */
.document-container {
    margin-bottom: 24px;
}

.document-paper {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-paper);
    padding: 40px;
    min-height: 400px;
    max-width: 1000px;
    overflow-x: auto;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.document-paper img {
    max-width: 100%;
    height: auto;
}

.document-paper table {
    max-width: 100%;
    overflow-x: auto;
}

.document-paper p {
    margin: 0 0 0.8em 0;
}

.document-paper ul,
.document-paper ol {
    padding-left: 2em;
    margin: 0.5em 0;
}

.document-paper .section-content li,
.document-paper .proposal-section > ul li,
.document-paper .proposal-section > ol li {
    margin-bottom: 0.8em;
}

.document-paper .toc li {
    margin-bottom: 0;
}

/* Signed document banner */
.signed-banner {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    color: #166534;
}

/* Signer initials stamp on each section */
.section-initial-stamp {
    position: absolute;
    bottom: 8px;
    right: 8px;
    font-family: 'Dancing Script', cursive;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary, #1a56db);
    background: rgba(26, 86, 219, 0.06);
    border: 1.5px solid rgba(26, 86, 219, 0.25);
    border-radius: 4px;
    padding: 2px 8px;
    line-height: 1.3;
    pointer-events: none;
    user-select: none;
}

.document-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 0;
    gap: 16px;
    color: var(--color-text-secondary);
}

/* --- Signing View --- */
.signing-container {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin: 24px 0;
    box-shadow: var(--shadow-sm);
}

.signing-title {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.signing-subtitle {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: 28px;
}

/* --- Form Elements --- */
.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}

.required {
    color: var(--color-error);
}

.optional {
    color: var(--color-text-light);
    font-weight: 400;
}

.form-input {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.9375rem;
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg-white);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.form-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input::placeholder {
    color: var(--color-text-light);
}

/* --- Signature Preview --- */
.signature-preview {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-white);
    padding: 20px;
    min-height: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: border-color 0.2s;
}

.signature-preview.has-text {
    border-style: solid;
    border-color: var(--color-accent);
}

.signature-preview-text {
    font-family: 'Dancing Script', cursive;
    font-size: 2rem;
    color: #00008B;
    text-align: center;
    word-break: break-word;
}

.signature-preview-placeholder {
    color: var(--color-text-light);
    font-family: var(--font-family);
    font-size: 0.9375rem;
}

.signature-meta {
    width: 100%;
    border-top: 1px solid var(--color-border);
    padding-top: 10px;
    font-family: 'Courier New', monospace;
    font-size: 0.6875rem;
    color: var(--color-text-light);
    text-align: center;
    line-height: 1.6;
    letter-spacing: 0.02em;
}

.legal-text {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    margin-top: 8px;
}

.legal-text p {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: var(--font-family);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    white-space: nowrap;
    line-height: 1.4;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--color-accent);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-accent-hover);
}

.btn-secondary {
    background-color: var(--color-bg);
    color: var(--color-text);
    border: 1.5px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-border);
}

.btn-text {
    background: none;
    color: var(--color-text-secondary);
    padding: 6px 10px;
    font-size: 0.8125rem;
    font-weight: 500;
}

.btn-text:hover {
    color: var(--color-error);
}

/* --- Inline Action Buttons --- */
.inline-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
    padding-bottom: 32px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
}

.submitting-state {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    color: var(--color-text-secondary);
    font-weight: 500;
    padding: 14px 0;
}

/* --- Confirmation View --- */
.confirmation-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    gap: 16px;
}

.success-icon {
    margin-bottom: 8px;
}

.confirmation-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-success);
}

.confirmation-detail {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

.confirmation-actions {
    margin-top: 8px;
}

/* --- Error View --- */
.error-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    gap: 16px;
    padding: 40px 20px;
}

.error-icon {
    margin-bottom: 8px;
}

.error-title {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-text);
}

.error-message {
    font-size: 1rem;
    color: var(--color-text-secondary);
    max-width: 480px;
    line-height: 1.6;
}

/* Error icon variant for "already signed" (info/warning style) */
.error-icon.info-style svg circle {
    stroke: var(--color-warning);
    fill: var(--color-warning-bg);
}

.error-icon.info-style svg path {
    stroke: var(--color-warning);
}

/* --- Responsive --- */
@media (max-width: 640px) {
    .logo-bar {
        padding: 16px 16px 4px;
    }

    .logo-img {
        height: 40px;
        max-height: 40px;
    }

    .app-main {
        padding: 0 6px 16px;
    }

    .document-meta {
        padding: 12px;
        margin: 12px 0 8px;
    }

    .meta-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .document-paper {
        padding: 4px 2px;
        border-radius: var(--radius-sm);
        border: none;
        box-shadow: none;
    }

    .document-paper .header {
        padding: 0 !important;
    }

    .document-paper table {
        font-size: 0.85em;
    }

    .signing-container {
        padding: 24px 20px;
        margin: 16px 0;
    }

    .signing-title {
        font-size: 1.25rem;
    }

    .inline-actions {
        flex-wrap: wrap;
    }

    .inline-actions .btn {
        flex: 1;
        min-width: 0;
    }

    .btn {
        padding: 10px 16px;
        font-size: 0.875rem;
    }

    .confirmation-title {
        font-size: 1.25rem;
    }

    .error-title {
        font-size: 1.25rem;
    }
}

@media (max-width: 380px) {
    .meta-grid {
        grid-template-columns: 1fr;
    }
}

/* --- Print Styles --- */
@media print {
    .logo-bar,
    .inline-actions,
    .section-nav {
        display: none !important;
    }

    .app-main {
        padding: 0;
        padding-bottom: 0;
        max-width: none;
    }

    .document-meta {
        border: none;
        box-shadow: none;
        padding: 0;
        margin: 0 0 20px;
    }

    .document-paper {
        border: none;
        box-shadow: none;
        padding: 0;
        border-radius: 0;
    }

    .view-signing,
    .view-loading,
    .view-confirmation,
    .view-error {
        display: none !important;
    }

    .view-document {
        display: block !important;
    }
}

/* --- Utility --- */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}