/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #f5f5f7;
    color: #1d1d1f;
    min-height: 100vh;
}

/* Nav */
.nav {
    background: #1d1d1f;
    color: #fff;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav-brand { color: #fff; text-decoration: none; font-weight: 700; font-size: 1.1rem; }
.nav-links { display: flex; gap: 0.5rem; }
.nav-link {
    color: #999;
    text-decoration: none;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.9rem;
}
.nav-link.active, .nav-link:hover { color: #fff; background: #333; }

/* Container */
.container { max-width: 600px; margin: 0 auto; padding: 1rem; }

/* Card */
.card {
    background: #fff;
    border-radius: 12px;
    padding: 1.25rem;
    margin-bottom: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

/* Form elements */
.label { display: block; font-weight: 600; font-size: 0.85rem; margin: 1rem 0 0.4rem; color: #555; }
.label:first-child { margin-top: 0; }
.input {
    width: 100%;
    padding: 0.7rem;
    border: 1.5px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    background: #fafafa;
    -webkit-appearance: none;
}
.input:focus { border-color: #007aff; outline: none; background: #fff; }
.textarea { resize: vertical; min-height: 100px; font-family: inherit; }
.char-count { text-align: right; font-size: 0.75rem; color: #999; margin-top: 0.25rem; }

/* Slider */
.slider { width: 100%; margin: 0.5rem 0; accent-color: #007aff; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.7rem 1.2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: opacity 0.2s;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn:active:not(:disabled) { opacity: 0.7; }
.btn-block { width: 100%; margin-top: 1rem; }
.btn-primary { background: #007aff; color: #fff; }
.btn-secondary { background: #e5e5ea; color: #1d1d1f; }
.btn-danger { background: #ff3b30; color: #fff; }
.btn-small { padding: 0.35rem 0.7rem; font-size: 0.8rem; }
.btn-record {
    background: #fff;
    border: 2px solid #ff3b30;
    color: #ff3b30;
    font-weight: 600;
}

/* Record */
.record-controls { display: flex; align-items: center; gap: 1rem; margin: 0.75rem 0; }
.record-dot {
    display: inline-block;
    width: 12px; height: 12px;
    border-radius: 50%;
    background: #ff3b30;
}
.record-dot.recording { animation: pulse 1s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }
.timer { font-size: 0.85rem; color: #999; font-variant-numeric: tabular-nums; }

/* Audio player */
.audio-player { width: 100%; margin: 0.75rem 0; }

/* Voice list */
.voice-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 0;
    border-bottom: 1px solid #f0f0f0;
}
.voice-item:last-child { border-bottom: none; }
.voice-name { font-size: 0.9rem; word-break: break-all; }

/* Sample text */
.sample-text-box {
    background: #f0f7ff;
    border: 1px solid #c8e1ff;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 0.5rem;
    font-size: 1.05rem;
    line-height: 1.7;
}
.sample-text-box .btn { margin-top: 0.75rem; }

/* Toggle group */
.toggle-group { display: flex; gap: 0; margin: 0.5rem 0; }
.toggle-btn {
    flex: 1;
    padding: 0.5rem;
    border: 1.5px solid #ddd;
    background: #fff;
    font-size: 0.9rem;
    cursor: pointer;
    color: #999;
}
.toggle-btn:first-child { border-radius: 8px 0 0 8px; }
.toggle-btn:last-child { border-radius: 0 8px 8px 0; border-left: none; }
.toggle-btn.active { background: #007aff; color: #fff; border-color: #007aff; }

/* Chip group */
.chip-group { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.4rem 0; }
.chip {
    padding: 0.35rem 0.75rem;
    border: 1.5px solid #ddd;
    border-radius: 20px;
    background: #fff;
    font-size: 0.85rem;
    cursor: pointer;
    color: #666;
    transition: all 0.15s;
}
.chip:hover { border-color: #007aff; color: #007aff; }
.chip.active { background: #007aff; color: #fff; border-color: #007aff; }

/* Loading */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255,255,255,0.9);
    z-index: 200;
}
.spinner {
    width: 36px; height: 36px;
    border: 3px solid #e5e5ea;
    border-top-color: #007aff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Login */
.login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
}
.login-title { font-size: 1.5rem; margin-bottom: 2rem; }
.login-form { width: 100%; max-width: 320px; }
.login-form .input { margin-bottom: 1rem; }

/* Utility */
.muted { color: #999; font-size: 0.9rem; }
.error-text { color: #ff3b30; font-size: 0.85rem; margin-top: 0.5rem; }

/* Safe area for notch phones */
@supports (padding-top: env(safe-area-inset-top)) {
    .nav { padding-top: calc(0.75rem + env(safe-area-inset-top)); }
    .container { padding-bottom: calc(1rem + env(safe-area-inset-bottom)); }
}