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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* Flash Messages */
.flash-messages {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
}

.flash-message {
    padding: 12px 24px;
    border-radius: 12px;
    margin-bottom: 10px;
    font-size: 14px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
}

.flash-message.error {
    background-color: rgba(254, 226, 226, 0.95);
    color: #dc2626;
    border: 1px solid #fecaca;
}

.flash-message.success {
    background-color: rgba(220, 252, 231, 0.95);
    color: #16a34a;
    border: 1px solid #bbf7d0;
}

/* Auth Pages */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.auth-box {
    background: rgba(255, 255, 255, 0.95);
    padding: 48px;
    border-radius: 24px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    width: 100%;
    max-width: 420px;
    backdrop-filter: blur(10px);
}

.auth-box h1 {
    text-align: center;
    margin-bottom: 32px;
    color: #1a1a1a;
    font-size: 32px;
    font-weight: 700;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #4a4a4a;
    font-weight: 600;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e5e5e5;
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #fafafa;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.btn {
    padding: 14px 28px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.auth-link {
    text-align: center;
    margin-top: 24px;
    color: #6b7280;
}

.auth-link a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.auth-link a:hover {
    text-decoration: underline;
}

/* Chat Page */
.chat-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 900px;
    margin: 0 auto;
    background: #ffffff;
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.3);
}

@media (min-width: 768px) {
    .chat-container {
        margin: 20px auto;
        height: calc(100vh - 40px);
        border-radius: 24px;
        overflow: hidden;
    }
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.header-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-logo {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-text h2 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 2px;
}

.chat-status {
    font-size: 13px;
    opacity: 0.9;
    display: flex;
    align-items: center;
    gap: 6px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #9ca3af;
}

.status-dot.online {
    background-color: #22c55e;
    box-shadow: 0 0 8px #22c55e;
}

.status-dot.offline {
    background-color: #9ca3af;
}

.header-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.25);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
}

.current-user {
    font-weight: 600;
    font-size: 14px;
}

.btn-logout {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all 0.3s ease;
}

.btn-logout:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.05);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
}

.message {
    max-width: 75%;
    display: flex;
    flex-direction: column;
    transition: all 0.2s ease;
}

.message.sent {
    align-self: flex-end;
    align-items: flex-end;
}

.message.received {
    align-self: flex-start;
    align-items: flex-start;
}

.message-sender {
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 4px;
    padding: 0 8px;
}

.message.sent .message-sender {
    color: #667eea;
}

.message.received .message-sender {
    color: #6b7280;
}

.message-bubble {
    padding: 12px 18px;
    border-radius: 20px;
    position: relative;
}

.message.sent .message-bubble {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-bottom-right-radius: 6px;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.message.received .message-bubble {
    background: white;
    color: #1a1a1a;
    border-bottom-left-radius: 6px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.message-content {
    word-wrap: break-word;
    line-height: 1.5;
    font-size: 15px;
}

.message-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 4px;
    padding: 0 8px;
}

.message-time {
    font-size: 11px;
    color: #9ca3af;
}

.message-actions {
    display: none;
    gap: 4px;
}

.message:hover .message-actions {
    display: flex;
}

.btn-action {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    color: #9ca3af;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-action:hover {
    background: rgba(0, 0, 0, 0.05);
    color: #667eea;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 24px;
    font-size: 13px;
    color: #6b7280;
}

.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dots span {
    width: 6px;
    height: 6px;
    background: #667eea;
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out;
}

.typing-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.4;
    }
    30% {
        transform: translateY(-6px);
        opacity: 1;
    }
}

/* Chat Input */
.chat-input {
    padding: 16px 24px;
    background: white;
    border-top: 1px solid #e5e7eb;
}

.chat-input form {
    display: flex;
    gap: 12px;
    align-items: center;
}

.chat-input input {
    flex: 1;
    padding: 14px 20px;
    border: 2px solid #e5e7eb;
    border-radius: 24px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: #f9fafb;
}

.chat-input input:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.btn-send {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-send:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.btn-send:active {
    transform: scale(0.95);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    padding: 28px;
    border-radius: 20px;
    width: 90%;
    max-width: 420px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h3 {
    font-size: 20px;
    font-weight: 700;
    color: #1a1a1a;
}

.modal-close {
    width: 36px;
    height: 36px;
    border: none;
    background: #f3f4f6;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6b7280;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: #e5e7eb;
    color: #1a1a1a;
}

.modal-content input {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 16px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.modal-content input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.modal-buttons {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

.btn-cancel {
    background: #f3f4f6;
    color: #4b5563;
}

.btn-cancel:hover {
    background: #e5e7eb;
}

.btn-save {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-save:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

/* Scrollbar */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: #9ca3af;
}

/* Empty State */
.chat-messages:empty::after {
    content: 'Henuz mesaj yok. Ilk mesaji sen gonder!';
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: #9ca3af;
    font-size: 15px;
}