:root {
    --bg-dark: #0f172a;
    --bg-panel: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #0ea5e9;
    --glass-blur: blur(12px);
    --font-main: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    background-image: radial-gradient(circle at top right, rgba(59, 130, 246, 0.15), transparent 40%),
                      radial-gradient(circle at bottom left, rgba(16, 185, 129, 0.1), transparent 40%);
}

.hidden { display: none !important; }
.active { display: flex !important; }

/* Utilities */
.glass-panel {
    background: var(--bg-panel);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-main);
    color: white;
}
.btn-primary { background: var(--primary); }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }
.btn-success { background: var(--success); }
.btn-block { width: 100%; }
.btn-icon { background: transparent; padding: 8px; color: var(--text-secondary); }
.btn-icon:hover { color: var(--danger); }

/* Login Screen Split Layout */
.split-login {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

.login-image-side {
    flex: 1;
    background: url('login_bg.png') no-repeat center center;
    background-size: cover;
    position: relative;
    display: flex;
    align-items: flex-end;
    padding: 60px;
}
.login-image-side .image-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(to bottom, rgba(15, 23, 42, 0.2), rgba(15, 23, 42, 0.9));
    z-index: 1;
}
.login-hero-content {
    position: relative;
    z-index: 2;
    max-width: 500px;
}
.hero-icon { font-size: 48px; color: var(--primary); margin-bottom: 20px; text-shadow: 0 0 20px rgba(59, 130, 246, 0.5); }
.login-hero-content h2 { font-size: 36px; font-weight: 700; color: white; margin-bottom: 16px; line-height: 1.2; }
.login-hero-content p { font-size: 18px; color: var(--text-secondary); line-height: 1.6; }

.login-form-side {
    width: 480px;
    background: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    box-shadow: -10px 0 30px rgba(0,0,0,0.5);
    z-index: 3;
}
.login-container { width: 100%; max-width: 360px; }
.login-header { text-align: center; margin-bottom: 40px; }
.login-header .logo { display: flex; align-items: center; justify-content: center; gap: 10px; color: var(--primary); font-size: 28px; font-weight: 700;}
.login-header p { color: var(--text-secondary); margin-top: 10px; font-size: 15px; }

.login-options { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; font-size: 14px; }
.login-options .remember-me { color: var(--text-secondary); display: flex; align-items: center; gap: 8px; cursor: pointer; }
.login-options .forgot-pwd { color: var(--primary); text-decoration: none; font-weight: 500; }
.login-options .forgot-pwd:hover { text-decoration: underline; }

.btn-lg { padding: 14px 24px; font-size: 16px; margin-top: 10px; }

.input-group {
    position: relative;
    margin-bottom: 20px;
}
.input-group i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}
.input-group input, .form-group input {
    width: 100%;
    padding: 14px 16px 14px 44px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: white;
    font-size: 16px;
    outline: none;
    transition: border-color 0.2s;
}
.form-group input { padding-left: 16px; }
.input-group input:focus, .form-group input:focus { border-color: var(--primary); }

.alert { padding: 12px; border-radius: 8px; margin-top: 15px; text-align: center; font-size: 14px; }
.alert-error { background: rgba(239, 68, 68, 0.2); color: #fca5a5; border: 1px solid rgba(239, 68, 68, 0.3); }

/* App Screen */
#app-screen { display: flex; height: 100vh; }

.sidebar {
    width: 280px;
    height: calc(100vh - 32px);
    margin: 16px;
    display: flex;
    flex-direction: column;
}
.logo-sidebar { padding: 24px; display: flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 700; color: var(--primary); border-bottom: 1px solid var(--border-color); }
.main-nav { flex: 1; padding: 20px 0; }
.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
}
.nav-item:hover, .nav-item.active { background: rgba(59, 130, 246, 0.1); color: var(--primary); border-right: 3px solid var(--primary); }

.sidebar-footer { padding: 20px; border-top: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
.user-info { display: flex; align-items: center; gap: 10px; }
.avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 14px; }

.main-content { flex: 1; display: flex; flex-direction: column; padding: 16px 16px 16px 0; overflow: hidden; }
.top-header { padding: 0 0 20px 0; }
.top-header h2 { font-size: 28px; font-weight: 600; }

.page-content { flex: 1; overflow-y: auto; padding-right: 10px; }
.view { display: flex; flex-direction: column; gap: 24px; }

/* Dashboard */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
.stat-card { padding: 24px; display: flex; align-items: center; gap: 20px; }
.stat-icon { width: 60px; height: 60px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 24px; }
.stat-icon.info { background: rgba(14, 165, 233, 0.2); color: var(--info); }
.stat-icon.warning { background: rgba(245, 158, 11, 0.2); color: var(--warning); }
.stat-icon.success { background: rgba(16, 185, 129, 0.2); color: var(--success); }
.stat-details h3 { font-size: 14px; color: var(--text-secondary); font-weight: 500; }
.stat-value { font-size: 32px; font-weight: 700; margin-top: 4px; }

/* Settings */
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
.settings-container { padding: 30px; }
.settings-container h3 { margin-bottom: 24px; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; color: var(--text-secondary); font-size: 14px; }
.form-group input:disabled { opacity: 0.5; cursor: not-allowed; }

/* Users Table */
.users-container { padding: 30px; }
.table-responsive { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; text-align: left; }
.data-table th { padding: 16px; background: rgba(0,0,0,0.2); color: var(--text-secondary); font-weight: 500; font-size: 14px; border-bottom: 1px solid var(--border-color); }
.data-table td { padding: 16px; border-bottom: 1px solid rgba(255,255,255,0.05); vertical-align: middle; }
.data-table tr:hover { background: rgba(255,255,255,0.02); }

/* Search */
.search-container { padding: 30px; }
.search-container h3 { margin-bottom: 8px; }
.search-container p { color: var(--text-secondary); margin-bottom: 24px; }
.search-bar { display: flex; gap: 10px; }
.search-bar input { flex: 1; padding: 16px 20px; border-radius: 10px; background: rgba(15, 23, 42, 0.6); border: 1px solid var(--border-color); color: white; font-size: 16px; outline: none; }
.search-bar input:focus { border-color: var(--primary); }

/* Pipeline Kanban */
.kanban-board { display: flex; gap: 20px; height: 100%; min-height: 500px; overflow-x: auto; padding-bottom: 10px; }
.kanban-column { flex: 1; min-width: 280px; background: rgba(30, 41, 59, 0.4); border-radius: 12px; display: flex; flex-direction: column; }
.kanban-header { padding: 16px; font-weight: 600; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; }
.kanban-header .badge { background: var(--primary); padding: 2px 8px; border-radius: 12px; font-size: 12px; }
.kanban-cards { flex: 1; padding: 12px; display: flex; flex-direction: column; gap: 12px; overflow-y: auto; }

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.1); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.2); }