*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

[hidden] {
    display: none !important;
}

:root {
    --color-primary: #0d9488;
    --color-primary-dark: #0f766e;
    --color-primary-light: rgba(13, 148, 136, 0.1);
    --color-bg: #f0f4f8;
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-border: #e2e8f0;
    --color-shadow: rgba(0, 0, 0, 0.06);
    --color-danger: #ef4444;
    --radius: 16px;
    --radius-sm: 10px;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0f172a;
        --color-surface: #1e293b;
        --color-text: #f1f5f9;
        --color-text-secondary: #94a3b8;
        --color-border: #334155;
        --color-shadow: rgba(0, 0, 0, 0.25);
        --color-primary-light: rgba(13, 148, 136, 0.15);
    }
}

html {
    height: 100%;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

body {
    font-family: var(--font);
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100dvh;
    -webkit-tap-highlight-color: transparent;
    padding-top: var(--safe-top);
    padding-bottom: var(--safe-bottom);
}

/* ========================
   Header
   ======================== */
.header {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    text-align: center;
    padding: 18px 16px 14px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.header__title {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.header__subtitle {
    font-size: 0.75rem;
    opacity: 0.85;
    margin-top: 2px;
    font-weight: 400;
}

/* ========================
   Main
   ======================== */
.main {
    max-width: 680px;
    margin: 0 auto;
    padding: 12px;
}

/* ========================
   Language bar
   ======================== */
.lang-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 12px;
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 8px 12px;
    box-shadow: 0 1px 4px var(--color-shadow);
}

.lang-bar__lang {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: 1.5px solid transparent;
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    cursor: pointer;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    transition: border-color 0.2s, background 0.2s;
    flex: 1;
    justify-content: center;
    min-width: 0;
}

.lang-bar__lang:hover,
.lang-bar__lang:focus {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.lang-bar__flag {
    font-size: 1.2rem;
    line-height: 1;
}

.lang-bar__name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.lang-bar__chevron {
    flex-shrink: 0;
    opacity: 0.5;
}

.lang-bar__swap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 2px solid var(--color-border);
    border-radius: 50%;
    background: var(--color-surface);
    color: var(--color-primary);
    cursor: pointer;
    transition: transform 0.3s ease, background 0.2s, border-color 0.2s;
    flex-shrink: 0;
}

.lang-bar__swap:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.lang-bar__swap:active {
    transform: rotate(180deg);
}

.lang-bar__swap.swapped {
    transform: rotate(180deg);
}

/* ========================
   Translator panels
   ======================== */
.translator {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.translator__panel {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: 0 1px 4px var(--color-shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.translator__textarea {
    width: 100%;
    min-height: 120px;
    padding: 14px 16px;
    border: none;
    outline: none;
    resize: none;
    font-family: var(--font);
    font-size: 1.05rem;
    line-height: 1.5;
    color: var(--color-text);
    background: transparent;
}

.translator__textarea::placeholder {
    color: var(--color-text-secondary);
}

.translator__result {
    padding: 14px 16px;
    font-size: 1.05rem;
    line-height: 1.5;
    min-height: 120px;
    white-space: pre-wrap;
    word-break: break-word;
    user-select: text;
    -webkit-user-select: text;
}

.translator__placeholder {
    color: var(--color-text-secondary);
    font-style: italic;
}

.translator__actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    border-top: 1px solid var(--color-border);
}

.translator__charcount {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    padding-left: 4px;
}

.translator__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: none;
    background: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: color 0.2s, background 0.2s;
}

.translator__btn:hover {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.translator__actions-right {
    display: flex;
    align-items: center;
    gap: 2px;
}

/* Mic recording state */
.translator__btn--mic.recording {
    color: var(--color-danger);
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.translator__btn--speak.speaking {
    color: var(--color-primary);
}

.translator__btn--copy.copied {
    color: var(--color-primary);
}

/* Loader */
.translator__loader {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

.spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* ========================
   Voice overlay
   ======================== */
.voice-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.voice-overlay__content {
    text-align: center;
    color: #fff;
    padding: 32px 24px;
    width: 100%;
    max-width: 340px;
}

/* Mic ring with animated pulse */
.voice-overlay__mic-ring {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: rgba(13, 148, 136, 0.15);
    border: 3px solid var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    position: relative;
    transition: transform 0.2s;
    color: var(--color-primary);
}

.voice-overlay__mic-ring.active {
    animation: ringPulse 2s ease-in-out infinite;
}

.voice-overlay__mic-ring.pulse {
    transform: scale(1.1);
}

.voice-overlay__mic-ring::before,
.voice-overlay__mic-ring::after {
    content: '';
    position: absolute;
    inset: -10px;
    border-radius: 50%;
    border: 2px solid var(--color-primary);
    opacity: 0;
}

.voice-overlay__mic-ring.active::before {
    animation: ringWave 2s ease-out infinite;
}

.voice-overlay__mic-ring.active::after {
    animation: ringWave 2s ease-out infinite 1s;
}

@keyframes ringPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(13, 148, 136, 0.3); }
    50% { box-shadow: 0 0 0 15px rgba(13, 148, 136, 0); }
}

@keyframes ringWave {
    0% { inset: -4px; opacity: 0.5; }
    100% { inset: -28px; opacity: 0; }
}

.voice-overlay__text {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.voice-overlay__timer {
    font-size: 0.85rem;
    opacity: 0.5;
    font-variant-numeric: tabular-nums;
    margin-bottom: 16px;
}

.voice-overlay__transcript {
    min-height: 48px;
    max-height: 150px;
    overflow-y: auto;
    margin-bottom: 24px;
    padding: 0 8px;
    font-size: 1rem;
    line-height: 1.5;
    text-align: center;
}

.voice-overlay__final {
    color: #fff;
}

.voice-overlay__interim {
    color: rgba(255, 255, 255, 0.5);
    font-style: italic;
}

.voice-overlay__stop {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border: none;
    border-radius: 50px;
    background: var(--color-danger);
    color: #fff;
    font-family: var(--font);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.15s, background 0.15s;
}

.voice-overlay__stop:active {
    transform: scale(0.93);
    background: #dc2626;
}

/* ========================
   Language Modal
   ======================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}

.modal__content {
    position: relative;
    width: 100%;
    max-width: 480px;
    max-height: 80dvh;
    background: var(--color-surface);
    border-radius: 20px 20px 0 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: slideUp 0.25s ease-out;
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

.modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px 12px;
    border-bottom: 1px solid var(--color-border);
}

.modal__title {
    font-size: 1.1rem;
    font-weight: 700;
}

.modal__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: var(--color-border);
    border-radius: 50%;
    color: var(--color-text-secondary);
    cursor: pointer;
}

.modal__search-wrap {
    position: relative;
    padding: 12px 20px;
}

.modal__search-icon {
    position: absolute;
    left: 32px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-secondary);
    pointer-events: none;
}

.modal__search {
    width: 100%;
    padding: 10px 12px 10px 38px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-bg);
    outline: none;
    transition: border-color 0.2s;
}

.modal__search:focus {
    border-color: var(--color-primary);
}

.modal__list {
    list-style: none;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    flex: 1;
    padding: 4px 8px 20px;
}

.modal__item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.15s;
}

.modal__item:hover {
    background: var(--color-primary-light);
}

.modal__item--active {
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 600;
}

.modal__item-flag {
    font-size: 1.4rem;
    line-height: 1;
}

.modal__item-name {
    flex: 1;
    font-size: 0.95rem;
}

/* ========================
   Install banner
   ======================== */
.install-banner {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: 0 2px 8px var(--color-shadow);
    padding: 16px 20px;
    margin-top: 12px;
    text-align: center;
}

.install-banner p {
    font-weight: 600;
    margin-bottom: 12px;
}

.install-banner__actions {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.install-banner__btn {
    padding: 10px 20px;
    border: none;
    border-radius: 50px;
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.15s;
}

.install-banner__btn:active {
    transform: scale(0.95);
}

.install-banner__btn--install {
    background: var(--color-primary);
    color: #fff;
}

.install-banner__btn--dismiss {
    background: var(--color-border);
    color: var(--color-text-secondary);
}

/* ========================
   iOS install hint
   ======================== */
.ios-hint {
    position: fixed;
    bottom: 20px;
    left: 12px;
    right: 12px;
    background: var(--color-surface);
    color: var(--color-text);
    padding: 14px 18px;
    border-radius: var(--radius);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    font-size: 0.85rem;
    line-height: 1.5;
    text-align: center;
    z-index: 300;
    animation: fadeInUp 0.3s ease-out;
    cursor: pointer;
}

.ios-hint svg {
    vertical-align: middle;
    margin: 0 2px;
}

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

/* ========================
   Desktop: side by side
   ======================== */
@media (min-width: 768px) {
    .translator {
        flex-direction: row;
    }

    .translator__panel {
        flex: 1;
    }

    .translator__textarea,
    .translator__result {
        min-height: 200px;
    }

    .header {
        padding: 22px 16px 18px;
    }

    .header__title {
        font-size: 1.6rem;
    }

    .main {
        padding: 16px;
    }

    .modal {
        align-items: center;
    }

    .modal__content {
        border-radius: var(--radius);
        max-height: 70vh;
    }
}