@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* Reset & Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --black: #000000;
    --white: #ffffff;
    --gray: #f5f5f5;
    --gray-dark: #666666;
    --border: #e0e0e0;
    --blue: #3b82f6;
    --red: #ef4444;
    --green: #10b981;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 100px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--black);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.3s, color 0.3s;
}

/* Dark Mode */
body.dark-mode {
    --black: #e4e6eb;
    --white: #18191a;
    --gray: #242526;
    --gray-dark: #b0b3b8;
    --border: #3a3b3c;
    --blue: #2d88ff;
    --red: #f02849;
    --green: #00a400;
}

/* Header */
.header {
    position: static;
    height: 64px;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
    z-index: 1000;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo svg {
    color: var(--black);
    flex-shrink: 0;
}

.beta-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: var(--blue);
    border-radius: 6px;
}

.beta-badge-text,
.beta-badge-version {
    font-size: 10px;
    font-weight: 700;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.dark-mode-toggle,
.sound-toggle {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--gray-dark);
    transition: color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dark-mode-toggle:hover,
.sound-toggle:hover {
    color: var(--black);
}

.user-count {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px var(--spacing-md);
    background: var(--gray);
    border-radius: var(--radius-full);
}

.online-dot {
    width: 8px;
    height: 8px;
    background: var(--green);
    border-radius: 50%;
    flex-shrink: 0;
}

.count-number {
    font-size: 14px;
    font-weight: 600;
    color: var(--black);
    line-height: 1;
}

.count-label {
    font-size: 13px;
    color: var(--gray-dark);
    line-height: 1;
}

/* Landing */
.landing-screen {
    min-height: 100vh;
    padding: var(--spacing-lg) var(--spacing-lg) 80px;
    display: flex;
    justify-content: center;
}

.landing-content {
    max-width: 900px;
    width: 100%;
}

.landing-logo {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.landing-logo svg {
    color: var(--black);
}

.tagline {
    font-family: 'Fredoka', sans-serif;
    font-size: 48px;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.description {
    text-align: center;
    font-size: 18px;
    color: var(--gray-dark);
    margin-bottom: var(--spacing-2xl);
}

/* Chat Modes */
.chat-modes {
    margin-bottom: var(--spacing-xl);
}

.chat-modes h3 {
    text-align: center;
    font-size: 24px;
    margin-bottom: var(--spacing-lg);
}

.mode-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.mode-card {
    background: var(--white);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.mode-card:hover {
    border-color: var(--black);
    transform: translateY(-2px);
}

.mode-card.selected {
    border-color: var(--black);
    background: var(--black);
    color: white;
}

.mode-card.selected svg {
    fill: white;
}

.mode-emoji {
    margin-bottom: var(--spacing-md);
}

.mode-emoji svg {
    width: 48px;
    height: 48px;
    fill: var(--black);
}

.mode-card h4 {
    font-size: 18px;
    margin-bottom: var(--spacing-sm);
}

.mode-card p {
    font-size: 14px;
    opacity: 0.7;
    margin: 0;
}

/* Buttons */
.btn-start {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--black);
    color: var(--white);
    border: none;
    border-radius: var(--radius-full);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 40px;
    transition: opacity 0.2s;
}

.btn-start:hover:not(:disabled) {
    opacity: 0.9;
}

.btn-start:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-box {
    background: var(--gray);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    line-height: 1;
}

.stat-label {
    font-size: 13px;
    color: var(--gray-dark);
    margin: 0;
}

/* Info Items */
.landing-info {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 14px;
    color: var(--gray-dark);
}

.info-item svg {
    fill: var(--gray-dark);
    flex-shrink: 0;
}

/* Features */
.features-section {
    margin-bottom: var(--spacing-2xl);
}

.features-section h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: var(--spacing-xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--gray);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
}

.feature-icon {
    margin-bottom: var(--spacing-md);
}

.feature-icon svg {
    width: 48px;
    height: 48px;
    fill: var(--blue);
}

.feature-card h4 {
    font-size: 20px;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    font-size: 14px;
    color: var(--gray-dark);
    margin: 0;
}

/* Safety Notice */
.safety-notice {
    background: #fffbeb;
    border: 1px solid #fbbf24;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.safety-icon svg {
    fill: #f59e0b;
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.safety-text {
    font-size: 14px;
    color: #78350f;
    margin: 0;
}

/* Searching Screen */
.searching-screen {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    z-index: 100;
    padding: var(--spacing-lg);
}

.searching-content {
    text-align: center;
}

.searching-animation {
    margin-bottom: var(--spacing-xl);
}

.spring-bounce {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.spring-bounce svg {
    color: var(--black);
}

.searching-content h2 {
    font-size: 28px;
    margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.searching-content p {
    color: var(--gray-dark);
    margin-bottom: var(--spacing-xl);
}

.btn-cancel {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gray);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    color: var(--black);
    font-size: 14px;
    font-weight: 600;
    transition: background 0.2s;
}

.btn-cancel:hover {
    background: var(--border);
}

/* Chat Screen */
.chat-screen {
    height: 100vh;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    z-index: 100;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.chat-header {
    height: 64px;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stranger-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.stranger-info > svg {
    color: var(--black);
}

.stranger-avatar {
    width: 40px;
    height: 40px;
    background: var(--gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stranger-avatar svg {
    fill: var(--gray-dark);
}

.stranger-label {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 2px;
}

.stranger-status {
    font-size: 12px;
    color: var(--gray-dark);
    opacity: 0;
    transition: opacity 0.3s;
}

.stranger-status.visible {
    opacity: 1;
}

.chat-header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-spring-header,
.btn-disconnect {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
}

.btn-spring-header {
    background: var(--white);
    border: 1px solid var(--border);
    color: var(--black);
}

.btn-spring-header:hover {
    background: var(--gray);
}

.btn-spring-header svg {
    fill: currentColor;
}

.btn-disconnect {
    background: var(--red);
    color: white;
    border: none;
}

.btn-disconnect:hover {
    opacity: 0.9;
}

.btn-disconnect svg {
    fill: white;
}

/* Chat Messages */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    background: var(--white);
}

.message {
    max-width: 70%;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 14px;
    word-wrap: break-word;
    line-height: 1.5;
}

.message.you {
    align-self: flex-end;
    background: var(--black);
    color: var(--white);
    border-bottom-right-radius: 4px;
}

.message.stranger {
    align-self: flex-start;
    background: var(--gray);
    color: var(--black);
    border-bottom-left-radius: 4px;
}

.system-message {
    text-align: center;
    color: var(--gray-dark);
    font-size: 13px;
    padding: var(--spacing-sm);
    align-self: center;
    margin: 0;
}

.celebration-message {
    text-align: center;
    background: var(--green);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin: var(--spacing-md) auto;
    max-width: 80%;
    font-weight: 600;
    align-self: center;
}

.warning-message {
    background: #fef3c7;
    border: 1px solid #fbbf24;
    color: #78350f;
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin: var(--spacing-sm) 0;
    font-size: 13px;
    text-align: center;
    align-self: center;
    max-width: 80%;
}

/* Chat Input */
.chat-input-container {
    border-top: 1px solid var(--border);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--white);
}

.quick-phrases {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    overflow-x: auto;
    padding-bottom: var(--spacing-sm);
}

.quick-phrases::-webkit-scrollbar {
    height: 4px;
}

.quick-phrases::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.quick-phrase-btn {
    padding: 6px var(--spacing-md);
    background: var(--gray);
    border: none;
    border-radius: var(--radius-full);
    font-size: 13px;
    white-space: nowrap;
    cursor: pointer;
    color: var(--black);
    transition: background 0.2s;
}

.quick-phrase-btn:hover {
    background: var(--border);
}

.input-row {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
    position: relative;
}

#messageInput {
    flex: 1;
    padding: var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 14px;
    resize: none;
    max-height: 120px;
    font-family: inherit;
    background: var(--white);
    color: var(--black);
    line-height: 1.5;
}

#messageInput:focus {
    outline: none;
    border-color: var(--blue);
}

.char-counter {
    position: absolute;
    bottom: -20px;
    right: 60px;
    font-size: 11px;
    color: var(--gray-dark);
}

.btn-send {
    width: 44px;
    height: 44px;
    background: var(--black);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: opacity 0.2s;
}

.btn-send:hover {
    opacity: 0.9;
}

.btn-send svg {
    fill: white;
}

/* Disconnected Screen */
.disconnected-screen {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    z-index: 100;
    padding: var(--spacing-lg);
}

.disconnected-content {
    text-align: center;
    max-width: 400px;
}

.disconnected-icon {
    margin-bottom: var(--spacing-lg);
}

.disconnected-icon svg {
    fill: var(--gray-dark);
}

.disconnected-content h2 {
    font-size: 28px;
    margin-bottom: var(--spacing-sm);
}

.disconnected-content p {
    color: var(--gray-dark);
    margin-bottom: var(--spacing-xl);
}

.disconnected-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary,
.btn-share {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 15px;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--black);
    color: var(--white);
    border: none;
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-share {
    background: var(--white);
    border: 1px solid var(--border);
    color: var(--black);
}

.btn-share:hover {
    background: var(--gray);
}

.btn-share svg {
    fill: currentColor;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: var(--spacing-lg);
}

.modal {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal h3 {
    font-size: 24px;
    margin-bottom: var(--spacing-md);
}

.modal > p {
    color: var(--gray-dark);
    margin-bottom: var(--spacing-lg);
    font-size: 14px;
}

.report-reasons,
.country-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    max-height: 400px;
    overflow-y: auto;
}

.report-reason,
.country-option {
    padding: var(--spacing-md);
    background: var(--gray);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--black);
    font-size: 14px;
    transition: all 0.2s;
}

.report-reason:hover,
.country-option:hover {
    background: var(--border);
}

.report-reason.selected {
    background: var(--red);
    color: white;
    border-color: var(--red);
}

.country-option.selected {
    background: var(--blue);
    color: white;
    border-color: var(--blue);
}

.report-textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    resize: vertical;
    min-height: 80px;
    margin-bottom: var(--spacing-md);
    font-family: inherit;
    background: var(--white);
    color: var(--black);
    font-size: 14px;
}

.report-textarea:focus {
    outline: none;
    border-color: var(--blue);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

.btn-modal {
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.btn-modal-cancel {
    background: var(--gray);
    border: none;
    color: var(--black);
}

.btn-modal-cancel:hover {
    background: var(--border);
}

.btn-modal-submit {
    background: var(--red);
    color: white;
    border: none;
}

.btn-modal-submit:hover:not(:disabled) {
    opacity: 0.9;
}

.btn-modal-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Welcome Tooltip */
.welcome-tooltip {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) 40px var(--spacing-md) var(--spacing-lg);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    z-index: 1001;
    max-width: 400px;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s;
}

.welcome-tooltip.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.welcome-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: transparent;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--gray-dark);
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.welcome-tooltip p {
    margin: 0;
    font-size: 14px;
}

.emoji {
    margin-right: var(--spacing-xs);
}

/* PWA Install Prompt */
.pwa-install-prompt {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 1001;
    max-width: 400px;
    width: calc(100% - 40px);
}

.pwa-prompt-content {
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
}

.pwa-prompt-icon svg {
    width: 48px;
    height: 48px;
    color: var(--black);
    flex-shrink: 0;
}

.pwa-prompt-text {
    flex: 1;
}

.pwa-prompt-text h4 {
    font-size: 14px;
    margin-bottom: 2px;
}

.pwa-prompt-text p {
    font-size: 12px;
    color: var(--gray-dark);
    margin: 0;
}

.pwa-install-btn {
    background: var(--black);
    color: var(--white);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
    flex-shrink: 0;
    transition: opacity 0.2s;
}

.pwa-install-btn:hover {
    opacity: 0.9;
}

.pwa-close-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: transparent;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--gray-dark);
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    padding: var(--spacing-xl) var(--spacing-lg);
    margin-top: 64px;
    text-align: center;
    background: var(--white);
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-link {
    color: var(--gray-dark);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

.footer-link:hover {
    color: var(--black);
}

.footer-text {
    font-size: 13px;
    color: var(--gray-dark);
    margin: 0;
}

/* Notification */
.custom-notification {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: var(--black);
    color: var(--white);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    z-index: 10001;
    opacity: 0;
    transition: all 0.3s;
    font-size: 14px;
    font-weight: 500;
    max-width: 400px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.custom-notification.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Confetti */
.confetti-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    overflow: hidden;
}

.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    top: -10px;
    animation: confettiFall 3s linear forwards;
}

@keyframes confettiFall {
    to { 
        transform: translateY(100vh) rotateZ(720deg); 
        opacity: 0; 
    }
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 16px;
        --spacing-xl: 20px;
        --spacing-2xl: 32px;
    }
    
    .header { 
        padding: 0 var(--spacing-lg); 
        height: 56px; 
    }
    
    .chat-header { 
        height: 56px; 
        padding: 0 var(--spacing-md);
    }
    
    .mode-grid { 
        grid-template-columns: 1fr; 
    }
    
    .stats-grid { 
        grid-template-columns: 1fr; 
    }
    
    .features-grid { 
        grid-template-columns: 1fr; 
    }
    
    .tagline { 
        font-size: 32px; 
    }
    
    .landing-info { 
        flex-direction: column; 
        gap: var(--spacing-md); 
    }
    
    .chat-header-actions { 
        gap: var(--spacing-xs); 
    }
    
    .btn-spring-header, 
    .btn-disconnect { 
        font-size: 12px; 
        padding: 6px 10px; 
    }
    
    .user-count { 
        padding: 4px var(--spacing-sm); 
    }
    
    .count-number { 
        font-size: 12px; 
    }
    
    .count-label { 
        font-size: 11px; 
    }
    
    .chat-messages {
        padding: var(--spacing-md);
    }
    
    .chat-input-container {
        padding: var(--spacing-md);
    }
}