:root {
    --bg: #0b1110;
    --bg-soft: #101714;
    --panel: #121b18;
    --panel-strong: #172320;
    --panel-border: rgba(117, 214, 165, 0.18);
    --text: #f1f7f3;
    --muted: #a4bbb0;
    --accent: #37c978;
    --accent-strong: #1fb564;
    --accent-soft: rgba(55, 201, 120, 0.16);
    --danger: #ff7b7b;
    --danger-soft: rgba(255, 123, 123, 0.12);
    --success-soft: rgba(55, 201, 120, 0.12);
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    --radius: 24px;
    --radius-sm: 16px;
    --font: "Segoe UI", "Trebuchet MS", "Verdana", sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font);
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(55, 201, 120, 0.16), transparent 30%),
        radial-gradient(circle at top right, rgba(156, 255, 196, 0.08), transparent 20%),
        linear-gradient(180deg, #090d0c 0%, var(--bg) 60%, #060909 100%);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.03) 0, rgba(255, 255, 255, 0.03) 1px, transparent 1px, transparent 4px);
    opacity: 0.05;
    mix-blend-mode: screen;
    pointer-events: none;
}

button,
input,
textarea,
select {
    font: inherit;
}

button {
    cursor: pointer;
}

.hidden {
    display: none !important;
}

.app-shell {
    width: min(1380px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 20px 0 0;
}

.surface {
    border: 1px solid var(--panel-border);
    background: linear-gradient(180deg, rgba(19, 31, 27, 0.96), rgba(13, 20, 18, 0.96));
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
}

.section-kicker {
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.72rem;
    color: #86d8ac;
}

.panel-head h2,
.panel-head h3 {
    margin: 0;
    line-height: 1.05;
}

.panel-note,
.preview-meta,
.upload-zone small,
.upload-status {
    color: var(--muted);
}

.tab-btn,
.ghost-btn,
.primary-btn,
.secondary-btn,
.upload-zone,
.saved-item,
.banner,
.message-card,
.unlock-dialog .dialog-card {
    border-radius: var(--radius-sm);
}

.workspace-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.95fr 0.78fr;
    gap: 20px;
    align-items: start;
    flex: 1;
}

.surface {
    padding: 22px;
    border-radius: var(--radius);
}

.designer-mark {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
    padding: 7px 12px;
    border: 1px solid rgba(134, 216, 172, 0.18);
    border-radius: 999px;
    background: linear-gradient(180deg, rgba(55, 201, 120, 0.12), rgba(55, 201, 120, 0.04));
    color: #d9f7e6;
    font-size: 0.82rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.designer-mark::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 10px rgba(55, 201, 120, 0.7);
}

.panel-head {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: start;
    margin-bottom: 18px;
}

.panel-head-tight {
    margin-bottom: 12px;
}

.tab-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 20px;
}

.tab-btn {
    border: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(255, 255, 255, 0.03);
    color: var(--muted);
    padding: 12px 10px;
    transition: transform 140ms ease, border-color 140ms ease, background 140ms ease, color 140ms ease;
}

.tab-btn:hover,
.tab-btn:focus-visible,
.ghost-btn:hover,
.ghost-btn:focus-visible,
.primary-btn:hover,
.primary-btn:focus-visible,
.secondary-btn:hover,
.secondary-btn:focus-visible,
.upload-zone:hover,
.upload-zone:focus-within {
    transform: translateY(-1px);
}

.tab-btn.is-active {
    color: var(--text);
    border-color: rgba(55, 201, 120, 0.45);
    background: linear-gradient(180deg, rgba(55, 201, 120, 0.24), rgba(55, 201, 120, 0.12));
}

.mode-panel {
    display: none;
}

.mode-panel.is-active {
    display: block;
    animation: panel-in 180ms ease;
}

@keyframes panel-in {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.field-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.field {
    display: grid;
    gap: 8px;
    margin-bottom: 14px;
}

.field span {
    font-size: 0.94rem;
}

.input {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    border-radius: 14px;
    padding: 14px 15px;
    outline: none;
    transition: border-color 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.input:focus {
    border-color: rgba(55, 201, 120, 0.52);
    box-shadow: 0 0 0 4px rgba(55, 201, 120, 0.12);
    background: rgba(255, 255, 255, 0.05);
}

textarea.input {
    resize: vertical;
    min-height: 120px;
}

.checkbox-field {
    align-content: center;
    padding: 11px 14px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.03);
    border-radius: 14px;
}

.checkbox-field input {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
}

.field-error {
    min-height: 1.1rem;
    color: var(--danger);
    font-size: 0.82rem;
}

.inline-options {
    margin-top: 8px;
    display: grid;
    gap: 14px;
}

.switch-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.03);
}

.switch {
    position: relative;
    width: 58px;
    height: 32px;
    border: 0;
    padding: 0;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
    transition: background 140ms ease;
}

.switch.is-on {
    background: rgba(55, 201, 120, 0.34);
}

.switch-knob {
    position: absolute;
    top: 4px;
    left: 4px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #fff;
    transition: transform 140ms ease;
}

.switch.is-on .switch-knob {
    transform: translateX(26px);
}

.banner {
    padding: 12px 14px;
    margin-top: 12px;
    border: 1px solid transparent;
}

.banner.error {
    color: #ffd6d6;
    border-color: rgba(255, 123, 123, 0.2);
    background: var(--danger-soft);
}

.banner.success {
    color: #def8e9;
    border-color: rgba(55, 201, 120, 0.2);
    background: var(--success-soft);
}

.preview-stage {
    margin-bottom: 16px;
}

.qr-frame {
    min-height: 370px;
    display: grid;
    place-items: center;
    padding: 24px;
    border-radius: 24px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01)),
        radial-gradient(circle at top right, rgba(55, 201, 120, 0.18), transparent 40%);
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.qr-frame canvas {
    width: min(100%, 320px);
    height: auto;
    background: #ffffff;
    border-radius: 20px;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.26);
}

.qr-frame.empty {
    border-style: dashed;
}

.qr-placeholder {
    text-align: center;
    display: grid;
    gap: 8px;
}

.qr-placeholder strong {
    font-size: 1.05rem;
}

.action-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 22px;
}

.ghost-btn,
.primary-btn,
.secondary-btn {
    min-height: 48px;
    border: 1px solid transparent;
    padding: 12px 16px;
}

.ghost-btn {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text);
    border-color: rgba(255, 255, 255, 0.07);
}

.primary-btn {
    background: linear-gradient(180deg, var(--accent), var(--accent-strong));
    color: #04120a;
    font-weight: 700;
}

.secondary-btn {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    border-color: rgba(255, 255, 255, 0.07);
}

.ghost-btn:disabled,
.primary-btn:disabled,
.secondary-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
}

.unlock-panel {
    padding-top: 4px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.upload-zone {
    position: relative;
    display: grid;
    gap: 6px;
    padding: 18px;
    border: 1px dashed rgba(134, 216, 172, 0.34);
    background: rgba(255, 255, 255, 0.025);
    text-align: center;
}

.upload-zone input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.upload-status {
    min-height: 1.3rem;
    margin-top: 10px;
}

.message-card {
    margin-top: 12px;
    padding: 16px;
    background: rgba(55, 201, 120, 0.08);
    border: 1px solid rgba(55, 201, 120, 0.16);
}

.message-label {
    display: block;
    margin-bottom: 10px;
    color: #c8f3d9;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.message-card pre {
    margin: 0;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--text);
}

.saved-list {
    display: grid;
    gap: 12px;
}

.saved-empty {
    padding: 18px;
    border: 1px dashed rgba(255, 255, 255, 0.08);
    border-radius: 18px;
    color: var(--muted);
}

.saved-item {
    display: grid;
    gap: 12px;
    padding: 14px;
    border: 1px solid rgba(255, 255, 255, 0.07);
    background: rgba(255, 255, 255, 0.03);
}

.saved-item img {
    width: 100%;
    border-radius: 14px;
    background: #ffffff;
}

.saved-item h3 {
    margin: 0;
    font-size: 1rem;
}

.saved-meta {
    color: var(--muted);
    font-size: 0.86rem;
}

.saved-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.unlock-dialog {
    width: min(460px, calc(100% - 24px));
    border: 0;
    padding: 0;
    background: transparent;
}

.unlock-dialog::backdrop {
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.unlock-dialog .dialog-card {
    margin: 0;
    padding: 20px;
    border: 1px solid var(--panel-border);
    background: linear-gradient(180deg, rgba(19, 31, 27, 0.98), rgba(12, 19, 17, 0.98));
}

.dialog-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 8px;
}

@media (max-width: 1180px) {
    .workspace-grid {
        grid-template-columns: 1fr 1fr;
    }

    .saved-panel {
        grid-column: 1 / -1;
    }
}

@media (max-width: 860px) {
    .workspace-grid,
    .field-grid,
    .action-grid,
    .saved-actions {
        grid-template-columns: 1fr;
    }

    .app-shell {
        width: min(100% - 18px, 760px);
        padding-top: 12px;
    }

    .surface {
        padding: 18px;
    }

    .tab-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .qr-frame {
        min-height: 310px;
    }
}