:root {
    --app-bg: var(--landing-bg-soft, #f7faff);
    --app-surface: var(--landing-surface-solid, #ffffff);
    --app-surface-soft: rgba(247, 250, 255, 0.78);
    --app-border: var(--landing-border, rgba(16, 24, 40, 0.11));
    --app-border-strong: var(--landing-border-strong, rgba(26, 86, 116, 0.22));
    --app-text: var(--landing-text, #101828);
    --app-text-soft: var(--landing-text-soft, #344054);
    --app-text-muted: var(--landing-text-muted, #667085);
    --app-primary: var(--landing-primary, #0062ff);
    --app-brand: var(--landing-brand, #1a5674);
    --app-accent: var(--landing-accent, #ff8c00);
    --app-radius-sm: var(--landing-radius-sm, 12px);
    --app-radius-md: var(--landing-radius-md, 18px);
    --app-radius-lg: var(--landing-radius-lg, 28px);
    --app-radius-xl: var(--landing-radius-xl, 36px);
    --app-shadow-sm: var(--landing-shadow-sm, 0 8px 24px rgba(16, 24, 40, 0.06));
    --app-shadow-md: var(--landing-shadow-md, 0 18px 48px rgba(16, 24, 40, 0.1));
    --app-shadow-focus: 0 0 0 4px rgba(0, 98, 255, 0.13);
}

body {
    color: var(--app-text);
    background:
        radial-gradient(circle at 10% 0%, rgba(0, 98, 255, 0.08), transparent 34rem),
        radial-gradient(circle at 86% 10%, rgba(255, 140, 0, 0.09), transparent 28rem),
        linear-gradient(180deg, #ffffff 0%, var(--app-bg) 58%, #ffffff 100%);
}

.app-home {
    padding-bottom: clamp(4rem, 7vw, 6rem);
}

.app-container {
    width: min(100% - 2rem, var(--landing-container, 1180px));
    margin-inline: auto;
    margin-top: 0rem;
    margin-bottom: 1.5rem;
}

.app-intro {
    display: grid;
    gap: clamp(1.25rem, 3vw, 2rem);
    align-items: end;
    padding-block: clamp(3.6rem, 8vw, 6.8rem) clamp(2rem, 5vw, 3.4rem);
}

.app-intro__copy {
    max-width: 780px;
}

.app-intro h1 {
    max-width: none;
    margin: 0 0 0.85rem;
    color: var(--app-text);
    font-size: clamp(2.25rem, 6vw, 4.65rem);
    line-height: 0.98;
    letter-spacing: -0.065em;
}

.app-intro p:not(.eyebrow) {
    max-width: 680px;
    margin: 0;
    color: var(--app-text-soft);
    font-size: clamp(1rem, 2vw, 1.2rem);
}

.flow-steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.65rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.flow-steps li {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    min-height: 48px;
    padding: 0.65rem 0.8rem;
    border: 1px solid rgba(26, 86, 116, 0.14);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.78);
    color: var(--app-text-soft);
    font-size: 0.9rem;
    font-weight: 720;
    box-shadow: var(--app-shadow-sm);
}

.flow-steps span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    width: 28px;
    height: 28px;
    border-radius: 999px;
    color: #fff;
    background: linear-gradient(135deg, var(--app-primary), var(--app-brand));
    font-size: 0.8rem;
    font-weight: 800;
}

.app-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(300px, 360px);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: start;
}

.workspace-column,
.settings-column {
    min-width: 0;
}

.settings-column {
    position: sticky;
    top: 96px;
}

.app-card {
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius-lg);
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.98), rgba(247, 250, 255, 0.74)),
        var(--app-surface);
    box-shadow: var(--app-shadow-md);
}

.workspace-card {
    padding: clamp(1.25rem, 4vw, 2rem);
}

.settings-card {
    padding: clamp(1.15rem, 3vw, 1.5rem);
}

.app-card__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.15rem;
}

.app-card__header h2,
.output-card h2 {
    margin: 0 0 0.35rem;
    color: var(--app-text);
    font-size: clamp(1.45rem, 3vw, 2.15rem);
    line-height: 1.05;
    letter-spacing: -0.045em;
}

.settings-card__header {
    margin-bottom: 0.75rem;
}

.settings-card__header h2 {
    font-size: 1.35rem;
}

.app-card__header p:not(.eyebrow),
.output-card__header p:not(.eyebrow) {
    margin: 0;
    color: var(--app-text-muted);
    font-size: 0.94rem;
    line-height: 1.45;
}

.mode-card {
    flex: 0 0 auto;
    min-width: min(100%, 330px);
    margin: 0;
    padding: 0.75rem;
    border: 1px solid rgba(26, 86, 116, 0.13);
    border-radius: var(--app-radius-md);
    background: rgba(255, 255, 255, 0.72);
}

.field-label {
    margin-bottom: 0.55rem;
    color: var(--app-text-muted);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.segmented-control {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.45rem;
    margin: 0;
}

.app-home .radio-option {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0.65rem 0.8rem;
    border: 1px solid var(--app-border);
    border-radius: 999px;
    background: #fff;
    color: var(--app-text-soft);
    font-size: 0.86rem;
    font-weight: 760;
    transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.app-home .radio-option:hover {
    transform: translateY(-1px);
    border-color: var(--app-border-strong);
    box-shadow: var(--app-shadow-sm);
}

.app-home .radio-option input[type="radio"] {
    accent-color: var(--app-primary);
}

.editor-group {
    margin-bottom: 0;
}

.editor-shell {
    overflow: hidden;
    border: 1px solid rgba(16, 24, 40, 0.1);
    border-radius: var(--app-radius-lg);
    background: #fff;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
    transition: border-color 160ms ease, box-shadow 160ms ease;
}

.editor-shell:focus-within {
    border-color: var(--app-primary);
    box-shadow: var(--app-shadow-focus), inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.app-home textarea {
    display: block;
    width: 100%;
    min-height: clamp(360px, 48vh, 560px);
    padding: clamp(1rem, 2.5vw, 1.4rem);
    border: 0;
    border-radius: 0;
    background:
        linear-gradient(180deg, rgba(247, 250, 255, 0.45), rgba(255, 255, 255, 0) 9rem),
        #fff;
    color: var(--app-text);
    font-size: 1.02rem;
    line-height: 1.7;
    resize: vertical;
}

.app-home textarea::placeholder {
    color: rgba(102, 112, 133, 0.78);
}

.app-home textarea:focus {
    outline: none;
}

.text-controls-row {
    align-items: center;
    gap: 0.8rem;
    margin-top: 0.8rem;
}

.text-controls-left,
.text-controls-center {
    gap: 0.5rem;
}

.text-controls-right {
    gap: 0.5rem;
}

.char-count {
    margin: 0;
    padding: 0.4rem 0.65rem;
    border: 1px solid rgba(26, 86, 116, 0.12);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.76);
    color: var(--app-text-muted);
    font-size: 0.78rem;
    font-weight: 700;
}

.app-home .button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    min-height: 44px;
    margin: 0;
    padding: 0.75rem 1rem;
    border: 1px solid transparent;
    border-radius: 999px;
    font-weight: 760;
    line-height: 1;
    text-decoration: none;
    transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.app-home .button:hover {
    transform: translateY(-1px);
    text-decoration: none;
}

.app-home .button-primary {
    width: 100%;
    min-height: 62px;
    padding: 1rem 1.35rem;
    color: #fff;
    background: linear-gradient(135deg, var(--app-primary), var(--app-brand));
    box-shadow: 0 16px 36px rgba(0, 98, 255, 0.26);
    font-size: 1.02rem;
}

.app-home .button-primary:hover {
    color: #fff;
    background: linear-gradient(135deg, #004dd1, var(--color-primary-dark, #004085));
    box-shadow: 0 20px 44px rgba(0, 98, 255, 0.32);
}

.app-home .secondary-button {
    color: var(--app-text);
    background: rgba(255, 255, 255, 0.84);
    border-color: var(--app-border);
    box-shadow: var(--app-shadow-sm);
}

.app-home .secondary-button:hover {
    color: var(--app-text);
    background: #fff;
    border-color: var(--app-border-strong);
}

.generate-area {
    margin-top: 1.25rem;
}

.app-home input[type="text"],
.app-home select {
    min-height: 46px;
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius-sm);
    background: #fff;
    color: var(--app-text);
    box-shadow: 0 1px 0 rgba(16, 24, 40, 0.02);
    transition: border-color 160ms ease, box-shadow 160ms ease;
}

.app-home input[type="text"]:focus,
.app-home select:focus {
    outline: none;
    border-color: var(--app-primary);
    box-shadow: var(--app-shadow-focus);
}

.app-home label {
    color: var(--app-text-soft);
    font-size: 0.88rem;
    font-weight: 720;
}

.app-home label i {
    width: 1.15rem;
    color: var(--app-brand);
}

.app-field,
.settings-reset {
    margin-bottom: 0;
}

.settings-group {
    display: grid;
    gap: 0.9rem;
    padding-top: 0.95rem;
}

.settings-group--primary {
    padding: 0;
}

.settings-details {
    margin-top: 0.9rem;
    border: 1px solid rgba(16, 24, 40, 0.08);
    border-radius: var(--app-radius-md);
    background: rgba(255, 255, 255, 0.64);
}

.settings-details summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.95rem 1rem;
    color: var(--app-text);
    cursor: pointer;
    font-weight: 800;
    list-style: none;
}

.settings-details summary::-webkit-details-marker {
    display: none;
}

.settings-details summary::after {
    flex: 0 0 auto;
    width: 9px;
    height: 9px;
    border: solid var(--app-text-muted);
    border-width: 0 2px 2px 0;
    content: "";
    transform: rotate(45deg);
    transition: transform 160ms ease;
}

.settings-details[open] summary::after {
    transform: rotate(225deg);
}

.settings-details .settings-group {
    padding: 0 1rem 1rem;
}

.settings-reset {
    margin-top: 0.9rem;
}

.app-home input[type="range"] {
    width: 100%;
    accent-color: var(--app-primary);
}

.app-home small {
    display: block;
    margin-top: 0.42rem;
    color: var(--app-text-muted);
    font-size: 0.78rem;
}

.app-home .alert,
.app-home .panel,
.output-card {
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius-md);
    background: rgba(255, 255, 255, 0.88);
    box-shadow: var(--app-shadow-sm);
}

.app-home .alert {
    padding: 0.95rem 1rem;
    color: var(--app-text-soft);
}

.app-home .alert--warning {
    border-left: 0;
    border-color: rgba(255, 140, 0, 0.28);
    background: linear-gradient(135deg, rgba(255, 244, 228, 0.9), rgba(255, 255, 255, 0.9));
}

.app-home .notice {
    margin: 1rem 0;
}

.app-home #status-message {
    margin-top: 1rem;
    text-align: left;
}

.output-card {
    margin-top: 1rem;
    padding: 1rem;
}

.output-card__header h3,
.output-card__header h2 {
    margin-top: 0;
}

.output-card__header h3 {
    margin-bottom: 0.3rem;
    color: var(--app-text);
    font-size: 1.05rem;
    letter-spacing: -0.02em;
}

.output-card__header p {
    margin: 0;
    color: var(--app-text-muted);
}

.app-home .panel {
    margin-left: 0;
}

.app-home .panel__actions {
    gap: 0.6rem;
}

.app-home .progress {
    height: 16px;
    border-radius: 999px;
    background: rgba(16, 24, 40, 0.08);
}

.app-home .progress__bar {
    border-radius: 999px;
    background: linear-gradient(135deg, #12b76a, var(--app-brand));
    font-size: 0.72rem;
}

.audio-output-row {
    align-items: center;
    gap: 1rem;
}

#audio-player {
    width: 100%;
    max-width: none;
}

#download-link {
    flex: 0 0 auto;
}

.byte-counter--overlimit {
    border-color: rgba(220, 53, 69, 0.26);
    color: var(--color-error, #dc3545);
    background: rgba(248, 215, 218, 0.42);
}

@media (min-width: 900px) {
    .app-intro {
        grid-template-columns: minmax(0, 1fr) minmax(360px, 0.52fr);
    }
}

@media (max-width: 1040px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .settings-column {
        position: static;
    }

    .settings-card {
        display: grid;
        gap: 0.9rem;
    }
}

@media (max-width: 760px) {
    .app-intro {
        padding-top: 2rem;
    }

    .flow-steps {
        grid-template-columns: 1fr;
    }

    .app-card__header {
        display: grid;
    }

    .mode-card {
        width: 100%;
        min-width: 0;
    }

    .segmented-control {
        grid-template-columns: 1fr;
    }

    .app-home textarea {
        min-height: 320px;
    }

    .text-controls-row {
        align-items: stretch;
    }

    .text-controls-left,
    .text-controls-center,
    .text-controls-right {
        justify-content: stretch;
    }

    .text-controls-left,
    .text-controls-center {
        display: grid;
    }

    .text-controls-right {
        align-items: stretch;
        text-align: left;
    }

    .audio-output-row {
        align-items: stretch;
    }

    #download-link {
        width: 100%;
    }
}

@media (max-width: 520px) {
    .app-container {
        width: min(100% - 1.25rem, var(--landing-container, 1180px));
    }

    .workspace-card,
    .settings-card {
        padding: 0.8rem;
        border-radius: 22px;
    }

    .editor-shell,
    .app-card,
    .output-card {
        border-radius: 22px;
    }

    .app-intro h1 {
        font-size: clamp(2rem, 12vw, 3.1rem);
    }
}