:root {
    /* Modern color palette - 2025 style */
    --primary: #007AFF;
    --primary-dark: #0062CC;
    --primary-light: #EBF5FF;
    --success: #34C759;
    --danger: #FF3B30;
    --warning: #FF9500;
    --text-primary: #000000;
    --text-secondary: #8E8E93;
    --background-primary: #FFFFFF;
    --background-secondary: #F2F2F7;
    --surface: #FFFFFF;
    --border: #C6C6C8;
    --border-radius: 14px;
    --border-radius-lg: 20px;
    --spacing: 8px;
    --transition: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary: #0A84FF;
        --primary-dark: #007AFF;
        --primary-light: #0A84FF20;
        --success: #30D158;
        --danger: #FF453A;
        --warning: #FF9F0A;
        --text-primary: #FFFFFF;
        --text-secondary: #98989D;
        --background-primary: #000000;
        --background-secondary: #1C1C1E;
        --surface: #2C2C2E;
        --border: #38383A;
    }
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    height: -webkit-fill-available;
    font-size: 16px;
}

body {
    font-family: -apple-system, 'Inter', BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background-primary);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: -webkit-fill-available;
    margin: 0;
    padding: 0;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overscroll-behavior: none;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: -webkit-fill-available;
    max-width: 430px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

/* Header */
.app-header {
    position: sticky;
    top: 0;
    z-index: 10;
    padding: env(safe-area-inset-top, 10px) 16px 10px;
    background-color: var(--background-primary);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.header-content {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.logo-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px 0;
    position: relative;
}

/* Modern glass effect for logo */
.glass-logo {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.05));
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    padding: 8px 16px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

@media (prefers-color-scheme: dark) {
    .glass-logo {
        background: linear-gradient(135deg, rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.2));
        border-color: rgba(255, 255, 255, 0.08);
    }
}

.logo {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
    position: relative;
    display: flex;
    align-items: center;
}

.logo-dot {
    width: 5px;
    height: 5px;
    background-color: var(--primary);
    border-radius: 50%;
    margin-left: 3px;
    animation: pulse 2s infinite;
}

/* Main Content */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    position: relative;
    -webkit-overflow-scrolling: touch;
}

/* Status */
.status {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    background-color: var(--background-secondary);
    border-radius: 100px;
    margin-bottom: 24px;
    transition: var(--transition);
    user-select: none;
    -webkit-user-select: none;
    box-shadow: var(--shadow-sm);
}

.status-icon {
    color: var(--text-secondary);
    margin-right: 8px;
    animation: spin 2s linear infinite;
}

.status-message {
    font-size: 14px;
    color: var(--text-secondary);
}

.status.connected {
    background-color: rgba(52, 199, 89, 0.1);
}

.status.connected .status-icon,
.status.connected .status-message {
    color: var(--success);
    animation: none;
}

.status.error {
    background-color: rgba(255, 59, 48, 0.1);
}

.status.error .status-icon,
.status.error .status-message {
    color: var(--danger);
    animation: none;
}

/* Notification styling */
.notification {
    position: fixed;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 20px;
    background-color: var(--background-primary);
    color: var(--text-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    max-width: 90%;
    width: auto;
    text-align: center;
    transition: top 0.3s ease-in-out;
    z-index: 1000;
    font-size: 14px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border);
}

.notification.show {
    top: env(safe-area-inset-top, 20px);
}

.notification.error {
    background-color: rgba(255, 59, 48, 0.15);
    border-color: rgba(255, 59, 48, 0.5);
    color: var(--danger);
}

.notification.success {
    background-color: rgba(52, 199, 89, 0.15);
    border-color: rgba(52, 199, 89, 0.5);
    color: var(--success);
}

.notification.info {
    background-color: rgba(0, 122, 255, 0.15);
    border-color: rgba(0, 122, 255, 0.5);
    color: var(--primary);
}

/* API Quota Error Modal */
.quota-message {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 100;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    flex-direction: column;
}

.quota-message.visible {
    display: flex;
}

.quota-content {
    background: var(--background-primary);
    padding: 24px;
    border-radius: var(--border-radius-lg);
    width: 85%;
    max-width: 350px;
    box-shadow: var(--shadow-lg);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: bounce-in 0.5s;
}

.quota-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.quota-text {
    text-align: center;
}

.quota-text h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.quota-text p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.quota-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 24px;
    height: 24px;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.quota-close:hover {
    background: rgba(0, 0, 0, 0.05);
}

.quota-retry {
    margin-top: 16px;
}

.quota-retry-button {
    background: var(--primary);
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.quota-retry-button:hover {
    background: var(--primary-dark);
}

@keyframes bounce-in {
    0% { transform: scale(0.8); opacity: 0; }
    70% { transform: scale(1.05); }
    100% { transform: scale(1); opacity: 1; }
}

/* Action Area */
.action-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-top: auto;
    margin-bottom: auto;
    padding: 40px 0;
    position: relative;
    user-select: none;
    -webkit-user-select: none;
}

.mic-button {
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, var(--surface), rgba(255, 255, 255, 0.8));
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1;
    user-select: none;
    min-width: 90px;
    min-height: 90px;
    border: none;
    outline: none;
    touch-action: manipulation;
}

.mic-button:active:not(:disabled) {
    transform: scale(0.95);
    box-shadow: var(--shadow);
}

.mic-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.mic-button-inner {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
    z-index: 2;
    background: radial-gradient(circle, var(--surface) 50%, rgba(255,255,255,0.95) 100%);
    border: 3px solid var(--primary-light);
    transition: var(--transition);
}

@media (prefers-color-scheme: dark) {
    .mic-button {
        background: linear-gradient(135deg, var(--surface), rgba(60, 60, 70, 0.8));
    }
    
    .mic-button-inner {
        background: radial-gradient(circle, var(--surface) 50%, rgba(40,40,40,0.95) 100%);
    }
}

.mic-button.recording .mic-button-inner {
    background: radial-gradient(circle, var(--danger) 50%, rgba(255,70,70,0.9) 100%);
    border-color: rgba(255, 59, 48, 0.2);
}

.mic-button.recording {
    box-shadow: 0 0 25px rgba(255, 59, 48, 0.4);
}

.mic-icon {
    color: var(--primary);
    transition: var(--transition);
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mic-button.recording .mic-icon {
    color: white;
}

.hidden {
    display: none !important;
}

.pulse-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    opacity: 0;
    z-index: 0;
}

.mic-button.recording .pulse-ring {
    animation: pulse-ring 1.5s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
    border: 3px solid var(--danger);
}

.wave-container {
    position: absolute;
    bottom: 15px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-around;
    align-items: flex-end;
    height: 25px;
}

.wave {
    width: 3px;
    height: 20px;
    background-color: white;
    border-radius: 3px;
    animation: wave-animation 1.2s ease infinite;
    transform-origin: center bottom;
}

.wave:nth-child(2) {
    animation-delay: -0.3s;
    height: 10px;
}

.wave:nth-child(3) {
    animation-delay: -0.6s;
    height: 16px;
}

.wave:nth-child(4) {
    animation-delay: -0.9s;
    height: 8px;
}

.wave:nth-child(5) {
    animation-delay: -1.2s;
    height: 14px;
}

.action-hint {
    margin-top: 24px;
    color: var(--text-secondary);
    font-size: 14px;
    text-align: center;
}

/* Tips Section */
.tips-container {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--border-radius-lg);
    padding: 16px;
    margin-top: 16px;
    animation: fade-in 0.3s ease-out;
    box-shadow: var(--shadow-sm);
}

.dark .tips-container {
    background: rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.08);
}

.tips-header {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.tips-list {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

.tips-list li {
    position: relative;
    padding-left: 16px;
    margin-bottom: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.tips-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 7px;
    width: 6px;
    height: 6px;
    background-color: var(--primary);
    border-radius: 50%;
}

/* Footer */
.app-footer {
    padding: 16px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 12px;
    background: linear-gradient(180deg, 
        rgba(255, 255, 255, 0) 0%, 
        var(--background-primary) 15%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding-bottom: env(safe-area-inset-bottom, 16px);
    transition: var(--transition);
}

.footer-content {
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    padding-top: 16px;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

@media (prefers-color-scheme: dark) {
    .app-footer {
        background: linear-gradient(180deg, 
            rgba(0, 0, 0, 0) 0%, 
            var(--background-primary) 15%);
    }
    
    .footer-content {
        border-top-color: rgba(255, 255, 255, 0.05);
    }
}

/* Animation for button interactions */
@keyframes pulse-button {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 122, 255, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(0, 122, 255, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 122, 255, 0);
    }
}

/* Animations */
@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.2);
        opacity: 0.8;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes wave-animation {
    0%, 100% {
        transform: scaleY(0.3);
    }
    50% {
        transform: scaleY(1);
    }
}

@keyframes pulse-ring {
    0% {
        opacity: 0.6;
        transform: scale(0.9);
    }
    100% {
        opacity: 0;
        transform: scale(1.5);
    }
}

@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slide-up {
    0% {
        opacity: 0;
        transform: translateY(16px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* PWA and iOS specifics */
@media (display-mode: standalone) {
    .app-header {
        padding-top: env(safe-area-inset-top, 20px);
    }
}

/* Media queries */
@media (max-width: 360px) {
    .status {
        margin-bottom: 16px;
    }
    
    .tips-container {
        padding: 12px;
    }
}

/* iOS specific improvements */
@supports (-webkit-touch-callout: none) {
    /* iOS-specific styles */
    .mic-button {
        touch-action: manipulation; /* Prevents double-tap zoom */
    }
    
    .mic-button:active {
        transform: scale(0.95);
        transition: transform 0.1s ease;
    }
    
    /* Fix for iOS Safari overscroll bounce */
    html, body {
        position: fixed;
        overflow: hidden;
        width: 100%;
        height: 100%;
    }
    
    .app-container {
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* Modern shadows */
.shadow-neumorph {
    box-shadow: 6px 6px 12px rgba(0, 0, 0, 0.1),
                -6px -6px 12px rgba(255, 255, 255, 0.8);
}

.dark .shadow-neumorph {
    box-shadow: 6px 6px 12px rgba(0, 0, 0, 0.3),
                -6px -6px 12px rgba(255, 255, 255, 0.05);
}