/* ============================================
   TalentInhA - Contalents AI Assistant
   Color Palette: Purple #9333EA, Slate tones
   Fonts: Poppins (headings), Inter (body)
   ============================================ */

:root {
    /* Primary Colors */
    --purple-500: #a855f7;
    --purple-600: #9333ea;
    --purple-700: #7e22ce;
    --purple-800: #6b21a8;
    --purple-900: #581c87;
    
    /* Neutrals */
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    --slate-950: #020617;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--purple-600) 0%, var(--purple-800) 100%);
    --gradient-dark: linear-gradient(180deg, var(--slate-900) 0%, var(--slate-950) 100%);
    --gradient-glow: radial-gradient(ellipse at 50% 0%, rgba(147, 51, 234, 0.3) 0%, transparent 60%);
    
    /* Glass Effect */
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(148, 163, 184, 0.1);
    --glass-blur: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(147, 51, 234, 0.4);
    
    /* Spacing */
    --header-height: 64px;
    --footer-height: 100px;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--gradient-dark);
    color: var(--slate-200);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Grid Background */
.grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    background-image: 
        var(--gradient-glow),
        linear-gradient(rgba(148, 163, 184, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, 0.03) 1px, transparent 1px);
    background-size: 100% 100%, 40px 40px, 40px 40px;
}

/* Glass Effect */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
}

/* Screen Container */
.screen {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.screen.hidden {
    display: none;
}

/* ============================================
   LOGIN SCREEN
   ============================================ */

.login-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-card {
    width: 100%;
    max-width: 420px;
    padding: 3rem 2.5rem;
    border-radius: 24px;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    animation: fadeInUp 0.6s ease-out;
}

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

/* Logo */
.logo-container {
    text-align: center;
    margin-bottom: 2.5rem;
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.logo-icon {
    display: flex;
    gap: 6px;
    margin-bottom: 4px;
}

.dot {
    width: 10px;
    height: 10px;
    background: var(--purple-500);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.dot:nth-child(2) {
    animation-delay: 0.2s;
}

.dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.1); }
}

.logo-text {
    font-family: 'Poppins', sans-serif;
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.logo-con {
    color: var(--slate-200);
}

.logo-talents {
    color: var(--purple-500);
}

.app-title {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-top: 0.5rem;
}

.app-subtitle {
    color: var(--slate-400);
    font-size: 1rem;
    margin-top: 0.25rem;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--slate-300);
    margin-bottom: 0.5rem;
}

.form-group input {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    color: var(--slate-100);
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    outline: none;
    transition: all 0.2s ease;
}

.form-group input::placeholder {
    color: var(--slate-500);
}

.form-group input:focus {
    border-color: var(--purple-500);
    box-shadow: 0 0 0 3px rgba(147, 51, 234, 0.2);
}

/* Buttons */
.btn-primary {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    color: white;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1.5rem;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

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

.login-footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--glass-border);
    color: var(--slate-500);
    font-size: 0.875rem;
}

.login-footer strong {
    color: var(--purple-400);
}

/* ============================================
   CHAT SCREEN
   ============================================ */

.chat-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    z-index: 100;
    border-bottom: 1px solid var(--glass-border);
}

.header-left {
    display: flex;
    align-items: center;
}

.logo-small {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon-small {
    display: flex;
    gap: 4px;
}

.dot-small {
    width: 6px;
    height: 6px;
    background: var(--purple-500);
    border-radius: 50%;
}

.logo-text-small {
    font-family: 'Poppins', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--purple-400);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

#user-email {
    font-size: 0.875rem;
    color: var(--slate-400);
}

.user-avatar {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(147, 51, 234, 0.2);
    border: 1px solid var(--purple-600);
    border-radius: 50%;
    color: var(--purple-400);
}

.btn-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: var(--slate-400);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-icon:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

/* Chat Container */
.chat-container {
    flex: 1;
    padding: calc(var(--header-height) + 1.5rem) 1.5rem calc(var(--footer-height) + 1.5rem);
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
}

.messages {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Message Styles */
.message {
    display: flex;
    gap: 1rem;
    animation: messageIn 0.3s ease-out;
}

@keyframes messageIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.user {
    flex-direction: row-reverse;
}

.message-avatar {
    flex-shrink: 0;
}

.avatar-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 12px;
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    color: white;
}

.message.user .avatar-icon {
    background: var(--slate-700);
}

.message-content {
    max-width: 75%;
    padding: 1rem 1.25rem;
    border-radius: 16px;
    border-top-left-radius: 4px;
}

.message.user .message-content {
    background: var(--gradient-primary);
    border-top-left-radius: 16px;
    border-top-right-radius: 4px;
    color: white;
}

.message-content p {
    margin-bottom: 0.75rem;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content ul {
    margin: 0.75rem 0;
    padding-left: 0;
    list-style: none;
}

.message-content li {
    padding: 0.25rem 0;
}

.message-content strong {
    color: var(--purple-300);
}

.message.user .message-content strong {
    color: white;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 0.5rem;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--purple-400);
    border-radius: 50%;
    animation: typingBounce 1.4s ease-in-out infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-8px); }
}

/* Chat Footer */
.chat-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--glass-border);
}

#chat-form {
    max-width: 900px;
    margin: 0 auto;
}

.input-container {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

#message-input {
    flex: 1;
    padding: 1rem 1.25rem;
    font-size: 1rem;
    font-family: inherit;
    color: var(--slate-100);
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    outline: none;
    transition: all 0.2s ease;
}

#message-input::placeholder {
    color: var(--slate-500);
}

#message-input:focus {
    border-color: var(--purple-500);
    box-shadow: 0 0 0 3px rgba(147, 51, 234, 0.15);
}

.btn-send {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-send:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.btn-send:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.footer-info {
    text-align: center;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--slate-500);
}

/* Responsive */
@media (max-width: 768px) {
    .login-card {
        padding: 2rem 1.5rem;
    }
    
    .app-title {
        font-size: 2rem;
    }
    
    #user-email {
        display: none;
    }
    
    .message-content {
        max-width: 85%;
    }
    
    .chat-container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* Loading State */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Error Message */
.error-toast {
    position: fixed;
    top: calc(var(--header-height) + 1rem);
    left: 50%;
    transform: translateX(-50%);
    padding: 0.75rem 1.5rem;
    background: rgba(239, 68, 68, 0.9);
    color: white;
    border-radius: 8px;
    font-size: 0.875rem;
    animation: slideDown 0.3s ease-out;
    z-index: 200;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}