:root {
    /* Dark Theme (Default) */
    --bg-color: #0b1121;
    --panel-bg: #111827;
    --panel-border: #1f2937;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --accent-color: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.15);
    
    --success-color: #34d399;
    --danger-color: #f87171;
    
    --input-bg: #1f2937;
    --bot-msg-bg: #1e293b;
    --user-msg-bg: #374151;
    
    --chart-grid: #1f2937;

    --font-sans: 'Inter', system-ui, sans-serif;
}

[data-theme="light"] {
    --bg-color: #f3f4f6;
    --panel-bg: #ffffff;
    --panel-border: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --accent-color: #0ea5e9;
    --accent-glow: rgba(14, 165, 233, 0.2);
    
    --success-color: #10b981;
    --danger-color: #ef4444;
    
    --input-bg: #f9fafb;
    --bot-msg-bg: #f0f9ff;
    --user-msg-bg: #e5e7eb;

    --chart-grid: #e5e7eb;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: var(--font-sans); }

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background-color 0.3s, color 0.3s;
    overflow-x: hidden;
}

.text-accent { color: var(--accent-color); }
.text-xs { font-size: 0.8rem; }
.hidden { display: none !important; }

/* Utilities */
.glass-panel {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.app-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    min-height: 100vh;
}

/* Header */
.topbar {
    display: flex; justify-content: space-between; align-items: center;
    animation: fadeInDown 0.5s ease-out;
}
.topbar-left { display: flex; align-items: center; gap: 1.5rem; }
.logo-wrapper { display: flex; align-items: center; gap: 0.8rem; }
.title-group h1 { font-size: 1.5rem; font-weight: 700; }
.title-group p { font-size: 0.85rem; color: var(--text-secondary); }

.topbar-right { display: flex; gap: 0.8rem; }

.btn {
    padding: 0.5rem 1rem; border-radius: 8px; border: 1px solid transparent;
    font-weight: 500; cursor: pointer; transition: all 0.2s;
    display: inline-flex; align-items: center; gap: 0.5rem;
    font-size: 0.9rem; background: transparent; color: var(--text-primary);
    text-decoration: none;
}
.btn-outline { border-color: var(--panel-border); }
.btn-outline:hover { background: var(--user-msg-bg); }
.btn-primary { background: var(--accent-color); color: white; box-shadow: 0 4px 15px var(--accent-glow); }
.btn-primary:not(:disabled):hover { filter: brightness(1.1); transform: translateY(-2px); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-icon { padding: 0.6rem; border-radius: 50%; }

/* KPI Grid */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    animation: fadeInUp 0.5s ease-out 0.1s both;
}
.kpi-card {
    padding: 1.5rem;
    border-top: 4px solid var(--accent-color);
    position: relative;
    overflow: hidden;
}
.kpi-icon {
    position: absolute; top: 1.5rem; right: 1.5rem;
    width: 48px; height: 48px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem;
}
.kpi-value { font-size: 2rem; font-weight: 700; margin-bottom: 0.2rem; }
.kpi-label { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 0.5rem; }
.kpi-title { font-size: 0.95rem; font-weight: 600; }
.kpi-trend {
    margin-top: 1rem; font-size: 0.85rem; font-weight: 600;
    display: flex; align-items: center; gap: 0.3rem;
}
.trend-up { color: var(--danger-color); }
.trend-down { color: var(--success-color); }

/* Tabs & Layout */
.main-layout {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    flex: 1;
    min-height: 500px;
}

.tabs-container {
    display: flex;
    justify-content: center;
    gap: 1rem;
    padding: 0.5rem;
    background: var(--panel-bg);
    border-radius: 16px;
    border: 1px solid var(--panel-border);
    width: fit-content;
    margin: 0 auto 1rem auto;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.esg-tab {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.6rem 2rem;
    border-radius: 10px;
    position: relative;
    transition: all 0.3s ease;
}

.esg-tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.esg-tab.active { 
    background: var(--accent-color);
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.tab-content { display: none !important; }
.tab-content.active { display: flex !important; width: 100%; }

/* Left Panel: Chart & Upload */
.left-panel { display: flex; flex-direction: column; gap: 1.5rem; animation: fadeInUp 0.5s ease-out 0.2s both;}

.chart-container {
    flex: 1;
    padding: 1.5rem;
    min-height: 400px;
    display: flex;
    align-items: center; justify-content: center;
}

canvas { width: 100% !important; height: 100% !important; }

.upload-zone {
    border: 2px dashed var(--panel-border);
    padding: 2rem;
    text-align: center;
    cursor: pointer; transition: all 0.3s;
}
.upload-zone:hover { border-color: var(--accent-color); background: var(--bot-msg-bg); }
.upload-icon { font-size: 2.5rem; margin-bottom: 0.5rem; }

.sample-data-section { margin-top: 1.5rem; }
.sample-buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem; }
.btn-sample { background: var(--input-bg); border: 1px solid var(--panel-border); border-radius: 20px; font-size: 0.8rem; padding: 0.4rem 0.8rem; }
.btn-sample:hover { border-color: var(--accent-color); color: var(--accent-color); }

.upload-status {
    display: flex; align-items: center; gap: 1rem; padding: 1.5rem;
    background: rgba(16, 185, 129, 0.1); border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 12px;
}
.status-icon i { font-size: 2.5rem; color: var(--success-color); }
.status-details h4 { color: var(--success-color); margin-bottom: 0.2rem; }

/* Right Panel: Chat Assistant */
.chat-panel {
    display: flex; flex-direction: column; padding: 1.5rem;
    animation: fadeInUp 0.5s ease-out 0.3s both;
    height: 600px;
    max-height: calc(100vh - 150px);
}
.panel-header { margin-bottom: 1.5rem; }
.panel-header h2 { font-size: 1.2rem; display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.2rem; }
.panel-header p { font-size: 0.85rem; color: var(--text-secondary); }

.chat-container {
    flex: 1; overflow-y: auto; padding-right: 0.5rem;
    margin-bottom: 1rem; display: flex; flex-direction: column; gap: 1rem;
}
.chat-container::-webkit-scrollbar { width: 5px; }
.chat-container::-webkit-scrollbar-thumb { background: var(--panel-border); border-radius: 3px; }

.message { display: flex; gap: 0.8rem; max-width: 90%; animation: fadeInUp 0.3s forwards; }
.msg-avatar {
    width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}

.system-msg .msg-avatar { background: var(--accent-glow); color: var(--accent-color); }
.system-msg .msg-content { background: var(--bot-msg-bg); border-bottom-left-radius: 4px; }

.user-msg { align-self: flex-end; flex-direction: row-reverse; }
.user-msg .msg-avatar { background: var(--user-msg-bg); color: var(--text-primary); }
.user-msg .msg-content { background: var(--user-msg-bg); border-bottom-right-radius: 4px; }

.msg-content { padding: 0.8rem 1.2rem; border-radius: 12px; line-height: 1.5; font-size: 0.9rem; }

.suggestions-container { margin-top: 1rem; border-top: 1px solid var(--panel-border); padding-top: 1rem;}
.suggestion-title { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 0.5rem;}
.suggestion-chips { display: flex; flex-direction: column; gap: 0.5rem; }
.chip {
    background: transparent; border: 1px solid var(--accent-color); color: var(--accent-color); padding: 0.4rem 0.8rem;
    border-radius: 6px; cursor: pointer; text-align: left; font-size: 0.8rem; transition: all 0.2s;
}
.chip:hover { background: var(--accent-glow); transform: translateX(3px); }

/* Chat Input */
.chat-input-wrapper { 
    position: sticky; 
    bottom: -1.5rem; 
    display: flex; 
    align-items: center; 
    background: var(--panel-bg);
    padding: 1.5rem 0;
    z-index: 10;
    width: 100%;
}
#chatInput {
    width: 100%; height: 50px; padding: 0 4rem 0 1.2rem; border-radius: 12px;
    border: 1px solid var(--panel-border); background: var(--input-bg);
    color: var(--text-primary); outline: none; transition: all 0.3s;
}
#chatInput:focus { border-color: var(--accent-color); }
#sendBtn { position: absolute; right: 0.6rem; width: 36px; height: 36px; border-radius: 50%; padding: 0; display: flex; justify-content: center; align-items: center; }

/* Toast */
.toast {
    position: fixed; bottom: 2rem; right: 2rem; padding: 1rem 2rem;
    background: var(--panel-bg); border-left: 4px solid var(--accent-color);
    border-radius: 8px; box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    z-index: 1000; animation: fadeInUp 0.3s;
}
.toast.success { border-color: var(--success-color); }
.toast.error { border-color: var(--danger-color); }

@keyframes fadeInUp { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-15px); } to { opacity: 1; transform: translateY(0); } }

/* Typing animation */
.typing-indicator { display: flex; gap: 4px; padding: 0.3rem 0;}
.typing-dot { width: 6px; height: 6px; background: var(--accent-color); border-radius: 50%; animation: typing 1.4s infinite; }
.typing-dot:nth-child(1) { animation-delay: -0.32s; } .typing-dot:nth-child(2) { animation-delay: -0.16s; }
@keyframes typing { 0%, 80%, 100% { transform: scale(0); } 40% { transform: scale(1); } }

@media (max-width: 1200px) {
    .main-layout { grid-template-columns: 1fr; }
    .chat-panel { min-height: 500px; }
}

@media (max-width: 768px) {
    .app-container { padding: 1rem 0.5rem; }
    .topbar { flex-wrap: wrap; gap: 0.8rem; justify-content: space-between; }
    
    .back-btn span { display: none; }
    .back-btn { padding: 0.5rem 0.8rem; }
    
    .title-group p { display: none; }
    .title-group h1 { font-size: 1.15rem; }
    .logo-wrapper { gap: 0.4rem; }
    
    .topbar-right { display: flex; align-items: center; gap: 0.5rem; }
    #reportBtn.btn { padding: 0.4rem 0.6rem; font-size: 0.8rem; }
    #themeToggleBtn.btn { padding: 0.4rem; }
    
    .esg-tab { padding: 0.5rem 1rem; font-size: 0.95rem; }
    .kpi-grid { grid-template-columns: repeat(2, 1fr); gap: 0.5rem; }
}

/* Modal Overlay */
.resume-modal {
    position: fixed; inset: 0; z-index: 2000;
    display: flex; align-items: center; justify-content: center;
}
.resume-modal.hidden { display: none !important; }
.resume-modal-overlay {
    position: absolute; inset: 0; background: rgba(0, 0, 0, 0.7); backdrop-filter: blur(5px);
}
.resume-modal-content {
    position: relative; border-radius: 16px; background: var(--panel-bg); border: 1px solid var(--panel-border);
    display: flex; flex-direction: column; animation: zoomIn 0.3s cubic-bezier(0.16, 1, 0.3, 1); box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}
.resume-modal-body { display: flex; align-items: center; }
@keyframes zoomIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}