:root {
    --bg: #eef3fb;
    --bg-strong: #dfeaff;
    --panel: #ffffff;
    --panel-soft: #f7faff;
    --text: #183153;
    --muted: #61738f;
    --line: #d9e3f4;
    --blue: #1877f2;
    --blue-dark: #0f5fc8;
    --blue-soft: #e8f1ff;
    --success: #1f9d5c;
    --danger: #d14343;
    --shadow: 0 20px 50px rgba(24, 62, 117, 0.12);
    --radius-xl: 28px;
    --radius-lg: 22px;
    --radius-md: 16px;
}

* {
    box-sizing: border-box;
}

html {
    background: var(--bg);
}

body {
    margin: 0;
    color: var(--text);
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(24, 119, 242, 0.18), transparent 28%),
        linear-gradient(180deg, #f6f9ff 0%, #eef3fb 100%);
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
textarea {
    font: inherit;
}

.login-body {
    display: grid;
    place-items: center;
    padding: 24px;
}

.login-app,
.shell {
    width: min(1120px, calc(100% - 24px));
}

.login-app {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
    gap: 28px;
    align-items: stretch;
}

.login-brand,
.login-card,
.panel-card,
.summary-card {
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(217, 227, 244, 0.95);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
}

.login-brand {
    padding: 40px;
    min-height: 620px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.brand-mark {
    width: 68px;
    height: 68px;
    display: grid;
    place-items: center;
    border-radius: 22px;
    background: linear-gradient(135deg, var(--blue), #62a5ff);
    color: #fff;
    font-weight: 800;
    font-size: 1.5rem;
    box-shadow: 0 14px 28px rgba(24, 119, 242, 0.25);
}

.eyebrow {
    margin-top: 18px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.75rem;
    color: var(--blue);
    font-weight: 700;
}

.login-brand h1,
.app-header h1 {
    margin: 12px 0 10px;
    font-size: clamp(2rem, 4vw, 3.6rem);
    line-height: 1.03;
    letter-spacing: -0.03em;
}

.login-brand p,
.panel-header p,
.app-header p,
.empty-state,
.muted-text,
.history-task p,
.note-row p,
.status-row p {
    color: var(--muted);
}

.brand-list {
    margin: 28px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 12px;
}

.brand-list li {
    padding: 14px 16px;
    border-radius: 16px;
    background: var(--blue-soft);
    border: 1px solid #d6e6ff;
}

.login-card,
.panel-card {
    padding: 26px;
}

.login-card {
    align-self: center;
}

.login-card-top h2,
.panel-header h2 {
    margin: 0 0 6px;
    font-size: 1.35rem;
}

.stack-form {
    display: grid;
    gap: 14px;
}

.stack-form label {
    display: grid;
    gap: 8px;
    font-size: 0.95rem;
}

input,
textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 14px 16px;
    background: var(--panel-soft);
    color: var(--text);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
textarea:focus {
    border-color: #99c2ff;
    box-shadow: 0 0 0 4px rgba(24, 119, 242, 0.12);
}

textarea {
    min-height: 92px;
    resize: vertical;
}

.primary-button,
.secondary-button,
.ghost-button {
    border: 0;
    border-radius: 16px;
    padding: 13px 16px;
    cursor: pointer;
    transition: transform 0.16s ease, background 0.16s ease;
    font-weight: 700;
}

.primary-button {
    background: linear-gradient(180deg, #2886ff, var(--blue));
    color: #fff;
}

.primary-button:hover {
    background: linear-gradient(180deg, #217aeb, var(--blue-dark));
}

.primary-button-large {
    min-height: 54px;
    font-size: 1rem;
}

.secondary-button,
.ghost-button {
    background: #eaf2ff;
    color: var(--blue-dark);
}

.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover {
    transform: translateY(-1px);
}

.login-help {
    margin-top: 18px;
    padding: 16px;
    border-radius: 18px;
    background: #f6f9ff;
    border: 1px solid var(--line);
    display: grid;
    gap: 6px;
    font-size: 0.95rem;
}

.alert {
    margin-bottom: 18px;
    padding: 14px 16px;
    border-radius: 16px;
    font-weight: 600;
}

.alert-success {
    background: rgba(31, 157, 92, 0.12);
    color: #177244;
}

.alert-error {
    background: rgba(209, 67, 67, 0.12);
    color: #a12c2c;
}

.app-body {
    padding: 20px 0 36px;
}

.shell {
    margin: 0 auto;
    display: grid;
    gap: 22px;
}

.shell-narrow {
    width: min(860px, calc(100% - 24px));
}

.app-header {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: flex-start;
    padding: 4px;
}

.app-header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.pill,
.chip,
.status-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 999px;
    background: var(--blue-soft);
    color: var(--blue-dark);
    border: 1px solid #d4e6ff;
}

.summary-row,
.content-grid {
    display: grid;
    gap: 18px;
}

.summary-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.summary-card {
    padding: 20px 22px;
}

.summary-card span {
    color: var(--muted);
    display: block;
    margin-bottom: 8px;
}

.summary-card strong {
    font-size: 2rem;
    line-height: 1;
}

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

.date-row {
    display: flex;
    gap: 12px;
    margin-bottom: 14px;
}

.chips-wrap,
.task-stack,
.status-stack,
.notes-stack,
.history-stack,
.task-board {
    display: grid;
    gap: 12px;
}

.chip {
    width: fit-content;
}

.task-line,
.status-row,
.note-row,
.history-row,
.history-card,
.task-card {
    border: 1px solid var(--line);
    background: var(--panel-soft);
    border-radius: 18px;
}

.task-line,
.status-row,
.note-row,
.history-row {
    padding: 14px 16px;
}

.task-line {
    display: flex;
    align-items: center;
    gap: 14px;
}

.task-order {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: #dbe9ff;
    color: var(--blue-dark);
    font-weight: 800;
}

.task-text {
    font-weight: 600;
}

.status-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
}

.status-row.is-good {
    border-color: rgba(31, 157, 92, 0.26);
    background: rgba(31, 157, 92, 0.08);
}

.note-row strong,
.history-card strong {
    display: block;
    margin-bottom: 6px;
}

.note-row span,
.history-row span,
.history-card span {
    color: var(--muted);
    font-size: 0.95rem;
}

.task-card {
    padding: 16px;
    display: grid;
    gap: 14px;
}

.task-card.done {
    background: rgba(31, 157, 92, 0.08);
    border-color: rgba(31, 157, 92, 0.22);
}

.task-card.done .task-title {
    text-decoration: line-through;
    opacity: 0.68;
}

.task-check {
    display: flex;
    gap: 12px;
    align-items: center;
}

.task-check input {
    width: 20px;
    height: 20px;
    margin: 0;
}

.task-title {
    font-weight: 700;
}

.task-actions {
    display: flex;
    justify-content: flex-end;
}

.complete-bar {
    margin-top: 16px;
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.history-card {
    padding: 16px;
}

.history-task {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--line);
}

.history-task span {
    display: block;
    font-weight: 600;
}

.empty-state {
    margin: 0;
    padding: 8px 0;
}

.success-text {
    color: var(--success);
    font-weight: 600;
}

.error-text {
    color: var(--danger);
    font-weight: 600;
}

@media (max-width: 980px) {
    .login-app,
    .content-grid,
    .summary-row {
        grid-template-columns: 1fr;
    }

    .login-brand {
        min-height: auto;
    }
}

@media (max-width: 640px) {
    .login-body,
    .app-body {
        padding: 14px 0 24px;
    }

    .login-app,
    .shell,
    .shell-narrow {
        width: calc(100% - 20px);
    }

    .login-brand,
    .login-card,
    .panel-card,
    .summary-card {
        padding: 18px;
        border-radius: 22px;
    }

    .app-header,
    .status-row,
    .date-row,
    .complete-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .app-header-actions,
    .task-actions {
        width: 100%;
    }

    .app-header-actions > *,
    .date-row > *,
    .complete-bar > *,
    .task-actions > * {
        width: 100%;
        justify-content: center;
    }
}