/* ========================================
   Summarizer Mode Styles
   Uses variables.css tokens
======================================== */

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

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

@keyframes sum-dot-bounce {
    0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
    40% { opacity: 1; transform: scale(1.1); }
}

.summarizer-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: var(--space-6);
    background:
        radial-gradient(circle at top right, rgba(245, 184, 0, 0.06), transparent 24%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.01), transparent 18%),
        var(--bg-base);
}

.sum-page-shell {
    width: 100%;
    max-width: 1380px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    animation: sum-fadeInUp 0.45s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.sum-back-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-default);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-spring);
    align-self: flex-start;
}

.sum-back-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.sum-page-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-6);
}

.sum-page-copy {
    max-width: 720px;
}

.sum-page-kicker {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 0 var(--space-3);
    border-radius: var(--radius-full);
    background: var(--accent-subtle);
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.sum-page-title {
    margin: var(--space-4) 0 var(--space-2);
    color: var(--text-primary);
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    line-height: 1.08;
}

.sum-page-subtitle {
    margin: 0;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
    max-width: 64ch;
}

.sum-page-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 var(--space-4);
    border-radius: var(--radius-full);
    background: var(--bg-glass);
    border: 1px solid var(--border-default);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    box-shadow: var(--shadow-sm);
}

.sum-container {
    display: grid;
    grid-template-columns: minmax(360px, 460px) minmax(0, 1fr);
    gap: var(--space-6);
    align-items: start;
}

.sum-input-col,
.sum-output-col {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.sum-output-col {
    position: sticky;
    top: 0;
    align-self: start;
}

.sum-card {
    position: relative;
    overflow: hidden;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0)),
        var(--bg-panel);
    border: 1px solid var(--border-default);
    border-radius: 22px;
    padding: var(--space-6);
    box-shadow: var(--shadow-floating);
}

[data-theme="dark"] .sum-card {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0)),
        var(--bg-panel);
}

.sum-card-header {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
}

.sum-card-heading {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.sum-card-eyebrow {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    min-height: 24px;
    padding: 0 var(--space-2);
    border-radius: var(--radius-full);
    background: var(--bg-hover);
    color: var(--text-tertiary);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.sum-card-title {
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-primary);
    font-size: 18px;
    font-weight: 700;
    line-height: 1.2;
}

.sum-card-title svg {
    color: var(--accent);
    flex-shrink: 0;
}

.sum-card-description {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.65;
}

.sum-source-tabs {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
    padding: var(--space-2);
    border-radius: 18px;
    background: var(--bg-glass);
    border: 1px solid var(--border-default);
}

.sum-source-tab {
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0 var(--space-4);
    border-radius: 14px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-spring);
    border: 1px solid transparent;
    white-space: nowrap;
}

.sum-source-tab:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.sum-source-tab.active {
    background: var(--accent);
    color: var(--accent-text);
    box-shadow: 0 10px 24px rgba(245, 184, 0, 0.2);
}

.sum-source-tab.active svg {
    stroke: var(--accent-text);
}

.sum-source-tab svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.sum-source-body {
    margin-top: var(--space-5);
}

.sum-source-panel {
    display: none;
}

.sum-source-panel.active {
    display: block;
}

.sum-textarea,
.sum-url-input {
    width: 100%;
    border-radius: 18px;
    border: 1px solid var(--border-default);
    background: var(--bg-inset);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    line-height: 1.7;
    transition: var(--transition-fast);
    box-sizing: border-box;
}

.sum-textarea {
    min-height: 320px;
    padding: var(--space-5);
    resize: vertical;
}

.sum-url-input {
    min-height: 52px;
    padding: 0 var(--space-4);
}

.sum-textarea:focus,
.sum-url-input:focus {
    outline: none;
    border-color: rgba(245, 184, 0, 0.5);
    box-shadow: 0 0 0 4px var(--accent-subtle);
}

.sum-textarea::placeholder,
.sum-url-input::placeholder {
    color: var(--text-placeholder);
}

.sum-url-stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.sum-input-hint {
    margin-top: var(--space-3);
    color: var(--text-tertiary);
    font-size: 13px;
    line-height: 1.6;
}

.sum-file-drop {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-8);
    border: 1px dashed rgba(245, 184, 0, 0.28);
    border-radius: 18px;
    background: var(--bg-inset);
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

.sum-file-drop:hover,
.sum-file-drop.dragover {
    border-color: rgba(245, 184, 0, 0.58);
    background: rgba(245, 184, 0, 0.08);
}

.sum-file-drop strong {
    color: var(--text-primary);
    font-size: 15px;
}

.sum-file-drop svg {
    color: var(--accent);
}

.sum-file-info {
    margin-top: var(--space-3);
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    font-size: 13px;
}

.sum-file-info.visible {
    display: flex;
}

.sum-file-info .filename {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 600;
    color: var(--text-primary);
}

.sum-file-remove {
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: transparent;
    border: none;
    color: var(--destructive);
    cursor: pointer;
    font-size: 16px;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.sum-file-remove:hover {
    background: var(--destructive-subtle);
}

.sum-settings-groups {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.sum-option-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding-top: var(--space-5);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.sum-option-group:first-child {
    padding-top: 0;
    border-top: none;
}

.sum-option-label {
    display: block;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.sum-pill-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.sum-pill {
    min-height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 var(--space-3);
    border-radius: 12px;
    background: var(--bg-hover);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    border: 1px solid transparent;
    white-space: nowrap;
}

.sum-pill:hover {
    background: var(--bg-active);
    color: var(--text-primary);
}

.sum-pill.active {
    background: var(--accent);
    color: var(--accent-text);
    box-shadow: 0 8px 20px rgba(245, 184, 0, 0.18);
}

.sum-check-group {
    display: grid;
    gap: var(--space-3);
}

.sum-check {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
    transition: var(--transition-fast);
}

.sum-check:hover {
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
}

.sum-check input[type="checkbox"] {
    width: 16px;
    height: 16px;
    margin-top: 2px;
    accent-color: var(--accent);
    cursor: pointer;
    flex-shrink: 0;
}

.sum-check span {
    flex: 1;
}

/* ─── Length Picker ──────────────────────────── */

.sum-length-picker {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
}

.sum-length-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: var(--space-4) var(--space-3);
    border-radius: 18px;
    background: var(--bg-glass);
    border: 1px solid var(--border-default);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-spring);
}

.sum-length-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.sum-length-btn.active {
    background: transparent;
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent), 0 8px 24px rgba(245, 184, 0, 0.15);
}

.sum-length-name {
    font-size: 15px;
    font-weight: 700;
    line-height: 1.2;
}

.sum-length-sub {
    font-size: 12px;
    font-weight: 500;
    opacity: 0.7;
}

.sum-length-btn.active .sum-length-name {
    color: var(--accent);
}

.sum-length-btn.active .sum-length-sub {
    color: var(--accent);
    opacity: 0.8;
}

.sum-actions-panel {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.025);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: var(--shadow-sm);
}

.sum-generate-btn {
    width: 100%;
    min-height: 56px;
    padding: 0 var(--space-5);
    border-radius: 16px;
    background: linear-gradient(180deg, #ffcb30 0%, var(--accent) 100%);
    color: var(--accent-text);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: var(--transition-fast);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    box-shadow: 0 14px 28px rgba(245, 184, 0, 0.2);
}

.sum-generate-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    background: linear-gradient(180deg, #ffd34f 0%, var(--accent-hover) 100%);
    box-shadow: 0 18px 36px rgba(245, 184, 0, 0.26);
}

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

.sum-generate-spinner {
    animation: sum-spin 1s linear infinite;
}

.sum-error {
    display: none;
    padding: var(--space-3) var(--space-4);
    border-radius: 14px;
    background: var(--destructive-subtle);
    color: #fca5a5;
    font-size: 13px;
    line-height: 1.5;
}

.sum-error.visible {
    display: block;
}

.sum-output-card {
    min-height: 760px;
    display: flex;
    flex-direction: column;
}

.sum-output-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-4);
    padding-bottom: var(--space-5);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.sum-output-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 36px;
    padding: 0 var(--space-3);
    border-radius: var(--radius-full);
    background: rgba(245, 184, 0, 0.12);
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}

.sum-output-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.sum-output-placeholder,
.sum-loading-dots {
    min-height: 340px;
}

.sum-output-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-10) var(--space-6);
    text-align: center;
    color: var(--text-tertiary);
    font-size: 14px;
}

.sum-output-placeholder strong {
    color: var(--text-primary);
    font-size: 18px;
}

.sum-output-placeholder span {
    max-width: 34ch;
    line-height: 1.7;
}

.sum-output-placeholder svg {
    width: 48px;
    height: 48px;
    opacity: 0.42;
}

.sum-loading-dots {
    display: flex;
    gap: 6px;
    justify-content: center;
    align-items: center;
    padding: var(--space-10) var(--space-6);
}

.sum-loading-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    animation: sum-dot-bounce 1.2s infinite ease-in-out;
}

.sum-loading-dots span:nth-child(2) { animation-delay: 0.15s; }
.sum-loading-dots span:nth-child(3) { animation-delay: 0.3s; }

.sum-output-content {
    display: none;
    width: 100%;
    padding: var(--space-6) 0 0;
    color: var(--text-primary);
    font-size: 15px;
    line-height: 1.8;
}

.sum-output-content.visible {
    display: block;
}

.sum-output-content .md-content {
    width: min(100%, 74ch);
    margin: 0 auto;
}

.sum-output-content .md-content h1,
.sum-output-content .md-content h2,
.sum-output-content .md-content h3 {
    color: var(--text-primary);
    margin-top: 1.8em;
    margin-bottom: 0.7em;
    line-height: 1.25;
}

.sum-output-content .md-content p,
.sum-output-content .md-content ul,
.sum-output-content .md-content ol,
.sum-output-content .md-content blockquote,
.sum-output-content .md-content pre {
    margin-bottom: 1em;
}

.sum-output-content .md-content li {
    margin-bottom: 0.45em;
}

.sum-output-actions {
    display: none;
    gap: var(--space-2);
    flex-wrap: wrap;
    padding-top: var(--space-5);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    margin-top: auto;
}

.sum-output-actions.visible {
    display: flex;
}

.sum-action-btn {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0 var(--space-4);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    border: 1px solid rgba(255, 255, 255, 0.05);
    white-space: nowrap;
}

.sum-action-btn:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}

.sum-action-btn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.sum-action-btn.copied {
    background: var(--success-subtle);
    color: var(--success);
    border-color: rgba(34, 197, 94, 0.18);
}

@media (max-width: 1200px) {
    .sum-container {
        grid-template-columns: minmax(320px, 430px) minmax(0, 1fr);
    }

    .sum-page-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .sum-page-badge {
        align-self: flex-start;
    }
}

@media (max-width: 1024px) {
    .sum-container {
        grid-template-columns: 1fr;
    }

    .sum-output-col {
        position: static;
    }

    .sum-output-card {
        min-height: 420px;
    }
}

@media (max-width: 768px) {
    .summarizer-section {
        padding: var(--space-4);
    }

    .sum-page-shell {
        gap: var(--space-5);
    }

    .sum-page-title {
        font-size: 28px;
    }

    .sum-card {
        padding: var(--space-5);
        border-radius: 18px;
    }

    .sum-source-tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
    }

    .sum-source-tab {
        flex: 0 0 auto;
    }

    .sum-textarea {
        min-height: 260px;
    }

    .sum-output-placeholder,
    .sum-loading-dots {
        min-height: 260px;
    }

    .sum-output-content {
        font-size: 14px;
    }

    .sum-output-content .md-content {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .summarizer-section {
        padding-bottom: calc(60px + env(safe-area-inset-bottom, 0));
    }
}