:root {
    /* Farbpalette Natur & Sand */
    --color-bg-base: #FDFBF7; /* Sehr helles Sand/Beige */
    --color-sand: #EEDC9A; /* Sonniges Beige/Sand */
    --color-sand-light: #F6EFCB;
    --color-green: #9CB495; /* Hellgrün-Natur */
    --color-green-dark: #6C8265;
    --color-text-main: #3E4A3D; /* Dunkles Grün-Grau für Text */
    --color-text-light: #7A8B79;
    --color-white: rgba(255, 255, 255, 0.85);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-shadow: 0 8px 32px 0 rgba(108, 130, 101, 0.1);
    
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 12px;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--color-bg-base);
    background-image: radial-gradient(circle at top right, var(--color-sand-light) 0%, transparent 40%),
                      radial-gradient(circle at bottom left, rgba(156, 180, 149, 0.2) 0%, transparent 40%);
    background-attachment: fixed;
    color: var(--color-text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    line-height: 1.5;
}

/* Glass Panel Base */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
}

/* --- LOGIN PAGE --- */
.login-body {
    padding: 20px;
}

.login-panel {
    padding: 40px;
    width: 100%;
    max-width: 420px;
    text-align: center;
}

.login-header {
    margin-bottom: 30px;
}

.login-header svg {
    color: var(--color-green-dark);
    margin-bottom: 16px;
}

.login-header h1 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.login-header p {
    color: var(--color-text-light);
    font-size: 15px;
}

.input-group {
    margin-bottom: 20px;
}

input[type="password"],
input[type="text"] {
    width: 100%;
    padding: 16px 20px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(156, 180, 149, 0.3);
    background: rgba(255, 255, 255, 0.9);
    font-family: 'Outfit', sans-serif;
    font-size: 16px;
    color: var(--color-text-main);
    transition: all 0.3s ease;
    outline: none;
}

input:focus {
    border-color: var(--color-green);
    box-shadow: 0 0 0 3px rgba(156, 180, 149, 0.2);
}

.btn-primary {
    width: 100%;
    padding: 16px 24px;
    border-radius: var(--radius-md);
    border: none;
    background: var(--color-green);
    color: white;
    font-family: 'Outfit', sans-serif;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover {
    background: var(--color-green-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(108, 130, 101, 0.2);
}

.error-message {
    color: #d9534f;
    font-size: 14px;
    margin-bottom: 16px;
    display: none;
}

/* --- APP PAGE --- */
.app-body {
    padding: 2vh 2vw;
    height: 100vh;
}

.app-container {
    width: 100%;
    max-width: 1000px;
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-green-dark);
}

.btn-icon {
    background: rgba(255, 255, 255, 0.5);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-main);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.9);
    color: var(--color-green-dark);
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 20px;
}

.chat-history {
    flex: 1;
    overflow-y: auto;
    padding-right: 10px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 20px;
}

/* Scrollbar Styling */
.chat-history::-webkit-scrollbar {
    width: 6px;
}
.chat-history::-webkit-scrollbar-track {
    background: transparent;
}
.chat-history::-webkit-scrollbar-thumb {
    background: rgba(156, 180, 149, 0.4);
    border-radius: 10px;
}

.message {
    display: flex;
    gap: 16px;
    max-width: 85%;
}

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

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.assistant-message .avatar {
    background: var(--color-green);
    color: white;
}

.user-message .avatar {
    background: var(--color-sand);
    color: var(--color-text-main);
}

.content {
    background: rgba(255, 255, 255, 0.8);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
    font-size: 15px;
}

.user-message .content {
    background: var(--color-sand-light);
    border-top-right-radius: 4px;
}

.assistant-message .content {
    border-top-left-radius: 4px;
}

.content p {
    margin-bottom: 8px;
}
.content p:last-child {
    margin-bottom: 0;
}
.content strong {
    color: var(--color-green-dark);
}
.content ul, .content ol {
    margin-left: 20px;
    margin-bottom: 8px;
}

.chat-input-area form {
    display: flex;
    gap: 12px;
}

.chat-input-area input {
    flex: 1;
    border-radius: var(--radius-lg);
}

.chat-input-area button {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    padding: 0;
}

/* Loading animation */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 8px 12px;
    align-items: center;
}
.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--color-green);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out both;
}
.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* --- QUICK BUTTONS --- */
.quick-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    overflow-x: auto;
    padding-bottom: 5px;
    -ms-overflow-style: none; /* IE and Edge */
    scrollbar-width: none; /* Firefox */
}
.quick-buttons::-webkit-scrollbar {
    display: none;
}
.quick-btn {
    background: var(--glass-bg);
    border: 1px solid var(--color-green);
    color: var(--color-green-dark);
    padding: 8px 16px;
    border-radius: 20px;
    font-family: 'Outfit', sans-serif;
    font-size: 14px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}
.quick-btn:hover {
    background: var(--color-green);
    color: white;
}

/* --- MIC BUTTON --- */
.mic-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--color-text-main);
}
.mic-btn.recording {
    background: #ff4757;
    color: white;
    animation: pulse 1.5s infinite;
    border-color: #ff4757;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(255, 71, 87, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(255, 71, 87, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 71, 87, 0); }
}

/* --- MODAL --- */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    width: 100%;
    max-width: 900px;
    height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--color-bg-base);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--glass-border);
    background: var(--glass-bg);
}

.modal-header h3 {
    font-weight: 600;
    font-size: 18px;
    color: var(--color-green-dark);
}

.modal-body {
    flex: 1;
    background: #ececec; /* Gray background for PDF viewer contrast */
}
/* --- SVG ANIMATIONS (LOADING) --- */
.anim-spin {
    transform-origin: center;
    animation: svg-spin 2s linear infinite;
}
@keyframes svg-spin {
    100% { transform: rotate(360deg); }
}

.anim-bounce {
    animation: svg-bounce 1s ease-in-out infinite alternate;
}
@keyframes svg-bounce {
    0% { transform: translateY(0); }
    100% { transform: translateY(-4px); }
}

.anim-pulse-wave {
    transform-origin: center;
    animation: svg-pulse 1s infinite alternate;
}
@keyframes svg-pulse {
    0% { transform: scale(1); opacity: 0.5; }
    100% { transform: scale(1.2); opacity: 1; }
}

.anim-move-x {
    animation: svg-move-x 2s ease-in-out infinite alternate;
}
@keyframes svg-move-x {
    0% { transform: translateX(-4px); }
    100% { transform: translateX(4px); }
}

.anim-blink {
    animation: svg-blink 0.5s steps(2, start) infinite;
}
@keyframes svg-blink {
    0% { opacity: 1; }
    50% { opacity: 0.3; }
    100% { opacity: 1; }
}

.loading-svg-container {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 48px;
    height: 48px;
    margin-right: 15px;
    background: var(--glass-bg);
    border-radius: 50%;
    border: 1px solid var(--glass-border);
    color: var(--color-green-dark);
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.progress-bar-container {
    width: 100%;
    height: 4px;
    background-color: rgba(0,0,0,0.05);
    border-radius: 2px;
    margin-top: 12px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background-color: var(--color-green-dark);
    animation: progress-fill 110s cubic-bezier(0.1, 0.8, 0.3, 1) forwards;
}

@keyframes progress-fill {
    0% { width: 0%; }
    100% { width: 95%; }
}

/* Dropdown Menu */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    top: 100%;
    margin-top: 8px;
    background-color: var(--glass-bg);
    min-width: 220px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.dropdown-content.show {
    display: block;
    animation: fadeIn 0.2s ease;
}

.dropdown-item {
    color: var(--color-text);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: background-color 0.2s ease;
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item:hover {
    background-color: rgba(255,255,255,0.4);
}

/* Upload Page Styles */
.upload-container {
    max-width: 500px;
    margin: 40px auto;
    padding: 30px;
}

.upload-container h2 {
    margin-bottom: 20px;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.file-input-wrapper {
    position: relative;
    overflow: hidden;
    display: inline-block;
    width: 100%;
}

.file-input-wrapper input[type=file] {
    font-size: 100px;
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    cursor: pointer;
    height: 100%;
}

.btn-file {
    display: block;
    text-align: center;
    background-color: rgba(255, 255, 255, 0.4);
    border: 1px dashed var(--color-text);
    padding: 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.btn-file:hover {
    background-color: rgba(255, 255, 255, 0.6);
}

.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 8px;
    background-color: rgba(0,0,0,0.05);
}

.alert-success {
    background-color: rgba(46, 204, 113, 0.2);
    border: 1px solid rgba(46, 204, 113, 0.5);
}

.alert-error {
    background-color: rgba(231, 76, 60, 0.2);
    border: 1px solid rgba(231, 76, 60, 0.5);
}