/* ZEISS Design System */
:root {
    /* ZEISS Official Colors */
    --zeiss-blue: #141E8C;
    --zeiss-white: #FFFFFF;
    --zeiss-blue-light: #2940B0;
    --zeiss-blue-dark: #0E1570;

    /* Semantic Colors */
    --background: #FAFAFA;
    --surface: #FFFFFF;
    --surface-variant: #F5F5F7;
    --border: #E5E5E7;
    --text-primary: #1A1A1A;
    --text-secondary: #6B6B70;
    --text-muted: #8E8E93;

    /* Dark Mode */
    --background-dark: #0A0A0A;
    --surface-dark: #1A1A1A;
    --surface-variant-dark: #2A2A2A;
    --border-dark: #3A3A3A;
    --text-primary-dark: #FFFFFF;
    --text-secondary-dark: #A0A0A0;
    --text-muted-dark: #707070;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-zeiss: 0 4px 20px rgba(20, 30, 140, 0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
}

/* Header */
.header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-md) var(--spacing-lg);
    backdrop-filter: blur(20px);
    z-index: 100;
    transition: all var(--transition-normal);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

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

.logo {
    width: 32px;
    height: 32px;
    object-fit: contain;
    transition: transform var(--transition-fast);
}

.logo:hover {
    transform: scale(1.05);
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--zeiss-blue);
    letter-spacing: -0.025em;
}

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

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--surface-variant);
    color: var(--text-primary);
    border-color: var(--zeiss-blue);
}

.clear-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.clear-btn:hover {
    background: var(--surface-variant);
    color: var(--text-primary);
    border-color: var(--zeiss-blue);
}

/* Main Content (container que rola) */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: center;
    scroll-behavior: smooth; /* rolagem suave */
}

/* Welcome Screen */
.welcome-screen {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    width: 100%;
    max-width: 1200px;
    padding: var(--spacing-lg) var(--spacing-md);
    min-height: calc(100vh - 140px);
    box-sizing: border-box;
}

.welcome-content {
    text-align: center;
    max-width: 800px;
    width: 100%;
    animation: fadeInUp 0.8s ease-out;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-xl);
    background: linear-gradient(135deg, var(--zeiss-blue), var(--zeiss-blue-light));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-zeiss);
    transition: transform var(--transition-normal);
}

.hero-logo:hover {
    transform: translateY(-2px) scale(1.02);
}

.hero-logo-img {
    width: 48px;
    height: 48px;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.welcome-title {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--zeiss-blue), var(--zeiss-blue-light));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.welcome-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
    max-width: 600px;
}

.suggestions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: var(--spacing-lg);;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    height: auto;
    min-height: 240px;
}

.suggestion-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-lg);
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    min-height: 100px;
    height: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

.suggestion-card:hover {
    border-color: var(--zeiss-blue);
    box-shadow: var(--shadow-zeiss);
    transform: translateY(-2px);
}

.suggestion-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.8rem;
}

.suggestion-desc {
    color: var(--text-secondary);
    font-size: 0.8rem;
    line-height: 1.4;
}

/* Chat Container */
.chat-container {
    width: 100%;
    max-width: 1200px;
    padding: var(--spacing-xl) 0;
}

.messages-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    padding-bottom: 120px;
}

.message {
    display: flex;
    gap: var(--spacing-md);
    animation: messageSlideIn 0.4s ease-out;
}

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

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.message.user .message-avatar {
    background: var(--zeiss-blue);
    color: var(--zeiss-white);
}

.message.ai .message-avatar {
    background: var(--surface-variant);
    color: var(--zeiss-blue);
    border: 1px solid var(--border);
    position: relative; /* para o spinner colar no avatar */
}

.message-content {
    max-width: 70%;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.message.user .message-content {
    background: var(--zeiss-blue);
    color: var(--zeiss-white);
    border-color: var(--zeiss-blue);
}

.message-text {
    line-height: 1.5;
    white-space: pre-wrap;
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--spacing-sm);
}

.message.user .message-time {
    color: rgba(255, 255, 255, 0.7);
}

/* Input Container */
.input-container {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: var(--spacing-lg);
    backdrop-filter: blur(20px);
    z-index: 100;
}

.input-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.message-input {
    flex: 1;
    background: var(--surface-variant);
    border: 1px solid var(--border);
    border-radius: 25px;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    outline: none;
    transition: all var(--transition-fast);
}

.message-input:focus {
    border-color: var(--zeiss-blue);
    box-shadow: 0 0 0 3px rgba(20, 30, 140, 0.1);
}

.send-button {
    width: 48px;
    height: 48px;
    background: var(--zeiss-blue);
    color: var(--zeiss-white);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
}

.send-button:hover {
    background: var(--zeiss-blue-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

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

/* Loading Indicator flutuante (opcional) */
.loading-indicator {
    position: fixed;
    bottom: 160px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 25px;
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(20px);
}

.loading-dots {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
}

.dot {
    width: 8px;
    height: 8px;
    background: var(--zeiss-blue);
    border-radius: 50%;
    animation: loadingDot 1.4s infinite ease-in-out;
}

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

/* Spinner pequeno no avatar da AI */
.ai-spinner {
    position: absolute;
    right: -4px;
    top: -4px;
    width: 14px;
    height: 14px;
    border: 2px solid var(--zeiss-blue);
    border-top-color: transparent;
    border-radius: 50%;
    background: var(--surface);
    animation: spin 1s linear infinite;
}

/* Aparência do "balão de carregamento" inline */
.loading-message .message-content {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes loadingDot {
    0%, 80%, 100% { transform: scale(0.8); opacity: 0.5; }
    40%           { transform: scale(1);   opacity: 1; }
}

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

/* Responsive Design */
@media (max-width: 1024px) {
    .header-content { padding: 0 var(--spacing-md); }
    .welcome-screen { padding: var(--spacing-lg) var(--spacing-md); min-height: calc(100vh - 120px); }
    .welcome-title { font-size: 2.5rem; }
    .suggestions-grid { max-width: 700px; gap: var(--spacing-md); min-height: 220px; }
    .suggestion-card { min-height: 90px; padding: var(--spacing-md); }
}

@media (max-width: 768px) {
    .header { padding: var(--spacing-md); }
    .header-buttons { gap: var(--spacing-xs); }
    .clear-btn span { display: none; }
    .main-content { padding: 0 var(--spacing-md); }
    .welcome-screen {
        padding: var(--spacing-sm) var(--spacing-md);
        min-height: calc(100vh - 100px);
        align-items: flex-start;
        padding-top: calc(var(--spacing-xl) + var(--spacing-md));
    }
    .welcome-title { font-size: 2rem; margin-bottom: var(--spacing-md); }
    .welcome-subtitle { font-size: 0.95rem; margin-bottom: var(--spacing-lg); }
    .suggestions-grid {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(4, auto);
        gap: var(--spacing-sm);
        max-width: 100%;
        min-height: auto;
        height: auto;
    }
    .suggestion-card { min-height: 70px; padding: var(--spacing-md); width: 100%; }
    .message-content { max-width: 85%; }
    .input-container { padding: var(--spacing-md); }
}

@media (max-width: 480px) {
    .app-title { font-size: 1.25rem; }
    .welcome-screen {
        padding: var(--spacing-sm);
        min-height: calc(100vh - 90px);
        align-items: flex-start;
        padding-top: var(--spacing-xl);
    }
    .welcome-title { font-size: 1.6rem; margin-bottom: var(--spacing-sm); }
    .welcome-subtitle { font-size: 0.9rem; margin-bottom: var(--spacing-md); }
    .suggestions-grid {
        max-width: 100%;
        gap: var(--spacing-xs);
        min-height: auto;
        grid-template-rows: repeat(4, minmax(60px, auto));
    }
    .suggestion-card {
        padding: var(--spacing-sm) var(--spacing-md);
        min-height: 60px; width: 100%;
    }
    .suggestion-title { font-size: 0.85rem; margin-bottom: 2px; }
    .suggestion-desc  { font-size: 0.75rem; line-height: 1.3; }
    .message-content  { max-width: 90%; }
    .input-wrapper    { gap: var(--spacing-sm); }
    .send-button      { width: 44px; height: 44px; }
}

/* Dark mode */
body.dark { background: var(--background-dark); color: var(--text-primary-dark); }
body.dark .header         { background: var(--surface-dark); border-color: var(--border-dark); }
body.dark .theme-toggle   { border-color: var(--border-dark); color: var(--text-secondary-dark); }
body.dark .theme-toggle:hover { background: var(--surface-variant-dark); color: var(--text-primary-dark); }
body.dark .clear-btn      { border-color: var(--border-dark); color: var(--text-secondary-dark); }
body.dark .clear-btn:hover{ background: var(--surface-variant-dark); color: var(--text-primary-dark); }
body.dark .suggestion-card{ background: var(--surface-dark); border-color: var(--border-dark); }
body.dark .suggestion-title{ color: var(--text-primary-dark); }
body.dark .suggestion-desc { color: var(--text-secondary-dark); }
body.dark .message-content { background: var(--surface-dark); border-color: var(--border-dark); }
body.dark .message.ai .message-avatar { background: var(--surface-variant-dark); border-color: var(--border-dark); }
body.dark .input-container { background: var(--surface-dark); border-color: var(--border-dark); }
body.dark .message-input   { background: var(--surface-variant-dark); border-color: var(--border-dark); color: var(--text-primary-dark); }
body.dark .loading-indicator { background: var(--surface-dark); border-color: var(--border-dark); }

/* Desativa o loader flutuante do rodapé: ficará só o spinner do avatar da AI */
.loading-indicator { display: none !important; }

/* Remove o spinner minúsculo no avatar da AI */
.ai-spinner { display: none !important; }