/* Reset default browser styles for consistent appearance */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
}

/* CSS Custom Properties for Color Scheme */
:root {
    --primary-pink: #db11fb;
    --primary-blue: #2d4af3;
    --light-blue: #3cc5e7;
    --dark-blue-1: #1a1a2e;
    --dark-blue-2: #16213e;
    --white: #fff;
    --white-transparent: rgba(255, 255, 255, 0.1);
    --white-transparent-2: rgba(255, 255, 255, 0.2);
    --white-transparent-3: rgba(255, 255, 255, 0.3);
    --white-transparent-5: rgba(255, 255, 255, 0.5);
    --white-transparent-7: rgba(255, 255, 255, 0.7);
    --white-transparent-8: rgba(255, 255, 255, 0.8);
    --white-transparent-9: rgba(255, 255, 255, 0.9);
    --pink-glow: rgba(219, 17, 251, 0.2);
    --pink-glow-3: rgba(219, 17, 251, 0.3);
    --pink-glow-4: rgba(219, 17, 251, 0.4);
    --pink-glow-5: rgba(219, 17, 251, 0.5);
}

/* Blue Color Scheme */
[data-theme="lightblue"] {
    --primary-pink: #3cc5e7;
    --primary-blue: #2c2a9d;
    --light-blue: #3cc5e7;
    /* White transparent variables for consistency */
    --white-transparent: rgba(255, 255, 255, 0.1);
    --white-transparent-2: rgba(255, 255, 255, 0.2);
    --white-transparent-3: rgba(255, 255, 255, 0.3);
    --white-transparent-5: rgba(255, 255, 255, 0.5);
    --white-transparent-7: rgba(255, 255, 255, 0.7);
    --white-transparent-8: rgba(255, 255, 255, 0.8);
    --white-transparent-9: rgba(255, 255, 255, 0.9);
    /* Blue glow replaces pink glow for this theme */
    --blue-glow: rgba(60, 197, 231, 0.2);
    --blue-glow-3: rgba(60, 197, 231, 0.3);
    --blue-glow-4: rgba(60, 197, 231, 0.4);
    --blue-glow-5: rgba(60, 197, 231, 0.5);
    /* For backwards compatibility, also set pink-glow variables to blue-glow values */
    --pink-glow: var(--blue-glow);
    --pink-glow-3: var(--blue-glow-3);
    --pink-glow-4: var(--blue-glow-4);
    --pink-glow-5: var(--blue-glow-5);
}

/* Base styles for the body element */
body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: linear-gradient(135deg, var(--dark-blue-1), var(--dark-blue-2));
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--white);
}

/* Main container for the chat application */
.chat-container {
    width: 90%;
    max-width: 800px;
    height: 85vh;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 8px 32px var(--pink-glow);
    display: flex;
    flex-direction: column;
    border: 1px solid var(--pink-glow);
    animation: glow 2s infinite alternate;
    position: relative;
    overflow: hidden;
}

@keyframes glow {
    from {
        box-shadow: 0 8px 32px var(--pink-glow);
    }
    to {
        box-shadow: 0 8px 32px var(--pink-glow-4);
    }
}

/* Header section containing title and buttons */
.chat-header {
    padding: 20px;
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-blue));
    color: white;
    border-radius: 20px 20px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: visible;
    z-index: 10001;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.1) 50%, transparent 100%);
    background-size: 200% 100%;
    animation: shine 3s infinite;
    pointer-events: none;
    box-sizing: border-box;
}

@keyframes shine {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* Brand section with logo and title */
.brand-section {
    display: flex;
    align-items: center;
    gap: 15px;
    position: relative;
    z-index: 1;
    flex: 1;
    justify-content: center;
}

.brand-logo {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--pink-glow-3);
    border: 2px solid var(--pink-glow-3);
    transition: all 0.3s ease;
    animation: logoGlow 4s ease-in-out infinite;
    background: rgba(255, 255, 255, 0.9);
    padding: 8px;
}

@keyframes logoGlow {
    0%, 100% { box-shadow: 0 4px 15px var(--pink-glow-3); }
    50% { box-shadow: 0 4px 20px var(--pink-glow-4); }
}

.brand-logo:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 25px var(--pink-glow-5);
    background: rgba(255, 255, 255, 1);
}

/* Back button styling */
.back-btn {
    background: var(--white-transparent);
    border: 2px solid var(--white-transparent-3);
    color: white;
    padding: 10px 16px;
    border-radius: 12px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    position: relative;
    z-index: 1;
    white-space: nowrap;
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
}

.back-btn:hover {
    background: var(--white-transparent-2);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--pink-glow-3);
}

/* Color toggle button styling */
.color-toggle-btn {
    background: var(--white-transparent);
    border: 2px solid var(--white-transparent-3);
    color: white;
    padding: 10px 12px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    font-size: 1.2rem;
    position: relative;
    z-index: 1;
    white-space: nowrap;
    min-width: 44px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
}

.color-toggle-btn:hover {
    background: var(--white-transparent-2);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--pink-glow-3);
}

.color-toggle-btn:active {
    transform: translateY(0);
}

/* Quick Exit button styling */
.quick-exit-btn {
    background: var(--white-transparent);
    border: 2px solid var(--white-transparent-3);
    color: white;
    padding: 10px 16px;
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 600;
    font-size: 0.9rem;
    position: relative;
    z-index: 1;
    white-space: nowrap;
    min-width: 44px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-sizing: border-box;
}

.quick-exit-btn:hover {
    background: var(--white-transparent-2);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--pink-glow-3);
    color: white;
    text-decoration: none;
}

.quick-exit-btn:active {
    transform: translateY(0);
}

/* Quick Exit button for auth pages (login/register) */
.auth-container .quick-exit-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.auth-container .quick-exit-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 12px rgba(219, 17, 251, 0.3);
}

/* Title text in the header */
.chat-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: 1px;
    position: relative;
    z-index: 1;
    text-align: center;
    flex: 1;
    text-transform: uppercase;
}

/* Container for header buttons */
.header-buttons {
    display: flex;
    gap: 16px;
    align-items: center;
    position: relative;
    z-index: 10002;
    flex-wrap: wrap;
    justify-content: flex-end;
    overflow: visible;
}

/* Button groups for logical organization */
.button-group {
    display: flex;
    gap: 8px;
    align-items: center;
    position: relative;
    z-index: 10003;
}

.button-group::after {
    content: '';
    position: absolute;
    right: -8px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 24px;
    background: var(--white-transparent-3);
}

.button-group:last-child::after {
    display: none;
}

/* Screen reader only text */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Button base styling */
.logout-btn, .clear-btn, .new-conversation-btn, .time-btn, .settings-btn {
    background: var(--white-transparent);
    border: 2px solid var(--white-transparent-3);
    color: white;
    padding: 10px 16px;
    border-radius: 12px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    white-space: nowrap;
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
}

/* Hover effect for buttons */
.clear-btn:hover, .logout-btn:hover, .new-conversation-btn:hover, .time-btn:hover, .settings-btn:hover {
    background: var(--white-transparent-2);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--pink-glow-3);
}

/* Dropdown menu styles */
.dropdown {
    position: relative;
    display: inline-block;
    z-index: 10000;
    overflow: visible;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
}

.dropdown-arrow {
    font-size: 0.7rem;
    transition: transform 0.3s ease;
}

.dropdown-toggle[aria-expanded="true"] .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--dark-blue-1);
    border: 2px solid var(--white-transparent-3);
    border-radius: 12px;
    padding: 8px 0;
    margin: 0;
    list-style: none;
    min-width: 160px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 100000;
}

/* Force solid background on mobile */
@media (max-width: 768px) {
    .dropdown-menu {
        background: rgb(26, 26, 46) !important;
        background-color: rgb(26, 26, 46) !important;
        opacity: 1 !important;
    }
    
    .dropdown-menu::after {
        content: '';
        position: absolute;
        top: -2px;
        left: -2px;
        right: -2px;
        bottom: -2px;
        background: rgb(26, 26, 46);
        border-radius: 12px;
        z-index: -1;
        pointer-events: none;
    }
    
    .dropdown-menu li {
        background: transparent !important;
    }
    
    .dropdown-item {
        background: transparent !important;
    }
    
    .dropdown-item:hover {
        background: rgba(255, 255, 255, 0.1) !important;
    }
}

.dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}


.dropdown-menu li {
    margin: 0;
    padding: 0;
}

.dropdown-item {
    width: 100%;
    background: transparent;
    border: none;
    color: white;
    padding: 12px 20px;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    display: block;
    box-sizing: border-box;
}

.dropdown-item:hover {
    background: var(--white-transparent);
    color: white;
}

.dropdown-item:focus {
    outline: 2px solid var(--primary-pink);
    outline-offset: -2px;
}

/* Container for chat messages */
.chat-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background: rgba(26, 26, 46, 0.5);
    scrollbar-width: thin;
    scrollbar-color: var(--primary-pink) var(--dark-blue-1);
    position: relative;
    z-index: 1;
}

/* Custom scrollbar */
.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: var(--dark-blue-1);
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--primary-pink);
    border-radius: 4px;
}

/* Message styling */
.message {
    margin-bottom: 20px;
    max-width: 80%;
    animation: messagePop 0.3s ease-out;
}

.message p {
    margin: 0 0 0.6em;
    line-height: 1.5;
}

.message ul,
.message ol {
    margin: 0 0 0.8em;
    padding-left: 1.35rem;
}

.message li {
    margin-bottom: 0.3em;
    line-height: 1.4;
}

.message strong,
.message b {
    font-weight: 700;
    color: var(--primary-blue);
}

.message em,
.message i {
    font-style: italic;
}

.message code {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    padding: 0.15em 0.4em;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.95em;
    display: inline-block;
}

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

/* User message styling */
.user-message {
    margin-left: auto;
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-blue));
    color: white;
    padding: 14px 20px;
    border-radius: 20px 20px 0 20px;
    box-shadow: 0 4px 15px var(--pink-glow);
    position: relative;
    overflow: hidden;
}

.user-message::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shine 2s infinite;
}

/* Assistant message styling */
.assistant-message {
    margin-right: auto;
    background: var(--white-transparent);
    color: white;
    padding: 14px 20px;
    border-radius: 20px 20px 20px 0;
    box-shadow: 0 4px 15px rgba(45, 74, 243, 0.2);
    border: 1px solid var(--white-transparent);
}

/* Chat input container */
.chat-input-container {
    padding: 20px;
    border-top: 1px solid var(--pink-glow);
    display: flex;
    gap: 12px;
    background: rgba(26, 26, 46, 0.8);
    border-radius: 0 0 20px 20px;
}

/* Textarea for user input */
#user-input {
    flex: 1;
    padding: 14px;
    background: var(--white-transparent);
    border: 2px solid var(--pink-glow-3);
    border-radius: 15px;
    resize: none;
    font-family: inherit;
    color: white;
    transition: all 0.3s ease;
    font-size: 1rem;
    outline: none;
}

#user-input::placeholder {
    color: var(--white-transparent-5);
}

#user-input:focus {
    border-color: var(--primary-pink);
    box-shadow: 0 0 15px var(--pink-glow-3);
    background: var(--white-transparent-2);
}

/* Send button */
#send-button {
    padding: 14px 28px;
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-blue));
    color: white;
    border: none;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

#send-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: 0.5s;
}

#send-button:hover::before {
    left: 100%;
}

#send-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--pink-glow-4);
}

#send-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Authentication container */
.auth-container {
    width: 90%;
    max-width: 400px;
    background: var(--white-transparent);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 8px 32px var(--pink-glow);
    border: 1px solid var(--pink-glow);
    text-align: center;
    /* Remove min-height: 100vh; and set height: auto for content fit */
    height: auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.auth-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, var(--pink-glow) 50%, transparent 70%);
    animation: authShine 6s ease-in-out infinite;
}

@keyframes authShine {
    0%, 100% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
}

.auth-container h1 {
    text-align: center;
    margin-bottom: 25px;
    color: var(--primary-pink);
    font-size: 2rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Form group styling */
.form-group {
    margin-bottom: 20px;
    text-align: left;
    position: relative;
    z-index: 1;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--white);
    font-weight: 500;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-group input {
    width: 100%;
    padding: 14px;
    background: var(--white-transparent);
    border: 2px solid rgba(219, 17, 251, 0.3);
    border-radius: 12px;
    font-size: 1rem;
    color: white;
    transition: all 0.3s ease;
    outline: none;
}

.form-group input:focus {
    border-color: var(--primary-pink);
    box-shadow: 0 0 15px var(--pink-glow-3);
    background: var(--white-transparent-2);
}

.auth-container button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-blue));
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1.1rem;
    margin-top: 15px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.auth-container button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: buttonShine 3s infinite;
}

@keyframes buttonShine {
    0%, 100% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
}

.auth-container button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--pink-glow-4);
}

.auth-container p {
    text-align: center;
    margin-top: 20px;
    color: var(--white-transparent-7);
    position: relative;
    z-index: 1;
}

.auth-container a {
    color: var(--primary-pink);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.auth-container a:hover {
    color: var(--primary-blue);
    text-shadow: 0 0 10px var(--pink-glow-5);
}

.alert {
    background: var(--pink-glow);
    color: var(--primary-pink);
    padding: 14px;
    border-radius: 12px;
    margin-bottom: 20px;
    text-align: center;
    border: 1px solid var(--pink-glow-3);
    animation: alertPulse 2s infinite;
    position: relative;
    z-index: 1;
}

@keyframes alertPulse {
    0% { box-shadow: 0 0 0 0 var(--pink-glow-4); }
    70% { box-shadow: 0 0 0 10px var(--pink-glow); }
    100% { box-shadow: 0 0 0 0 var(--pink-glow); }
}

/* Mobile Responsive Design */
@media (max-width: 768px) {
    html, body {
        height: auto;
        min-height: 100vh;
        overflow-x: hidden;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    body {
        align-items: flex-start;
        padding: 0;
    }
    
    .chat-container {
        width: 100%;
        max-width: 100%;
        min-height: 100vh;
        height: auto;
        border-radius: 0;
        margin: 0;
        overflow: visible;
    }
    
    .chat-header {
        border-radius: 0;
        padding: 12px;
        flex-wrap: wrap;
        flex-shrink: 0;
    }
    
    .chat-messages {
        padding: 12px;
        overflow-y: visible;
        flex: 1;
        min-height: auto;
    }
    
    .chat-input-container {
        padding: 12px;
        flex-shrink: 0;
    }
    
    .dropdown-menu,
    .dropdown-menu.show {
        background: rgb(26, 26, 46) !important;
        background-color: rgb(26, 26, 46) !important;
        opacity: 1 !important;
        border: 2px solid rgba(255, 255, 255, 0.3);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.8);
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
    }
    
    .dropdown-menu li {
        background: transparent !important;
    }
    
    .dropdown-item {
        background: transparent !important;
    }
    
    .auth-container {
        width: 95%;
        max-width: 95%;
        margin: 10px auto;
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .chat-header {
        padding: 12px;
        flex-direction: column;
        gap: 12px;
    }
    
    .brand-section {
        flex-direction: column;
        gap: 8px;
        width: 100%;
    }
    
    .brand-logo {
        width: 40px;
        height: 40px;
    }
    
    .chat-header h1 {
        font-size: 1.3rem;
        line-height: 1.2;
    }
    
    .header-buttons {
        width: 100%;
        justify-content: center;
        gap: 8px;
        flex-wrap: wrap;
    }
    
    .button-group {
        gap: 6px;
    }
    
    .button-group::after {
        display: none;
    }
    
    .back-btn, .logout-btn, .clear-btn, .new-conversation-btn, .time-btn, .quick-exit-btn, .color-toggle-btn {
        padding: 10px 12px;
        font-size: 0.8rem;
        min-height: 44px;
        min-width: 44px;
    }
    
    .dropdown-menu,
    .dropdown-menu.show {
        background: rgb(26, 26, 46) !important;
        background-color: rgb(26, 26, 46) !important;
        opacity: 1 !important;
        border: 2px solid rgba(255, 255, 255, 0.3);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.8);
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
    }
    
    .dropdown-menu li {
        background: transparent !important;
    }
    
    .dropdown-item {
        background: transparent !important;
    }
    
    .chat-messages {
        padding: 10px;
    }
    
    .message {
        max-width: 95%;
        margin-bottom: 15px;
    }
    
    .user-message, .assistant-message {
        padding: 10px 14px;
        font-size: 0.9rem;
        line-height: 1.4;
    }
    
    .chat-input-container {
        padding: 10px;
        flex-direction: column;
        gap: 10px;
    }
    
    #user-input {
        padding: 12px;
        font-size: 1rem; /* Prevent zoom on iOS */
        min-height: 44px;
        width: 100%;
    }
    
    #send-button {
        padding: 12px 24px;
        font-size: 0.9rem;
        width: 100%;
        min-height: 44px;
    }
    
    .auth-container {
        padding: 20px 15px;
        margin: 10px;
    }
    
    .auth-container h1 {
        font-size: 1.6rem;
        margin-bottom: 20px;
    }
    
    .form-group {
        margin-bottom: 18px;
    }
    
    .form-group input {
        padding: 14px;
        font-size: 1rem; /* Prevent zoom on iOS */
        min-height: 44px;
    }
    
    .auth-container button {
        padding: 14px;
        font-size: 1rem;
        min-height: 44px;
    }
    
    .auth-container p {
        font-size: 0.9rem;
        margin-top: 15px;
    }
}

/* Stack button groups vertically on very small screens */
@media (max-width: 360px) {
    .header-buttons {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }
    
    .button-group {
        justify-content: center;
        width: 100%;
    }
    
    .back-btn, .logout-btn, .clear-btn, .new-conversation-btn, .time-btn, .quick-exit-btn, .color-toggle-btn {
        width: 100%;
    }
}

@media (min-width: 481px) and (max-width: 768px) {
    html, body {
        height: auto;
        min-height: 100vh;
        overflow-x: hidden;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    body {
        align-items: flex-start;
        padding: 10px 0;
    }
    
    .chat-container {
        max-width: 95%;
        margin: 0 auto;
        min-height: 95vh;
        height: auto;
    }
    
    .chat-header {
        padding: 15px;
        flex-wrap: wrap;
    }
    
    .header-buttons {
        gap: 10px;
    }
    
    .button-group {
        gap: 8px;
    }
    
    .back-btn, .logout-btn, .clear-btn, .new-conversation-btn, .time-btn, .color-toggle-btn, .quick-exit-btn {
        padding: 10px 14px;
        font-size: 0.85rem;
        min-width: 44px;
        min-height: 44px;
    }
    
    .auth-container {
        max-width: 400px;
        margin: 20px auto;
        padding: 25px;
    }
    
    .form-group input {
        font-size: 1rem; /* Prevent zoom on iOS */
    }
}

@media (min-width: 769px) {
    .chat-container {
        max-width: 800px;
        margin: 0 auto;
        height: 85vh;
    }
    
    .auth-container {
        max-width: 400px;
        margin: 40px auto;
    }
}

/* Focus styles for accessibility */
.back-btn:focus, .logout-btn:focus, .clear-btn:focus, .new-conversation-btn:focus, .time-btn:focus, .color-toggle-btn:focus, .quick-exit-btn:focus, .settings-btn:focus, .dropdown-toggle:focus {
    outline: 3px solid var(--primary-pink);
    outline-offset: 2px;
    box-shadow: 0 0 0 2px var(--white-transparent-3), 0 0 0 5px var(--primary-pink);
}

/* Ensure buttons remain accessible on keyboard navigation */
.back-btn:focus-visible, .logout-btn:focus-visible, .clear-btn:focus-visible, 
.new-conversation-btn:focus-visible, .time-btn:focus-visible, .color-toggle-btn:focus-visible, 
.quick-exit-btn:focus-visible, .settings-btn:focus-visible, .dropdown-toggle:focus-visible {
    outline: 3px solid var(--primary-pink);
    outline-offset: 2px;
}

#user-input:focus {
    outline: none;
}

#send-button:focus {
    outline: 3px solid var(--primary-pink);
    outline-offset: 2px;
}

.form-group input:focus {
    outline: none;
}

.auth-container button:focus {
    outline: 3px solid var(--primary-pink);
    outline-offset: 2px;
}