/* ==================== CSS VARIABLES ==================== */
:root {
  --primary: #1a56db;
  --primary-light: #3b82f6;
  --primary-dim: rgba(26,86,219,.07);
  --secondary: #059669;
  --background: #f0f2f5;
  --surface: #fff;
  --surface-hover: #f8f9fb;
  --text-primary: #1a1d23;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --border: #e0e3e8;
  --border-light: #eef0f3;
  --danger: #dc2626;
  --danger-dim: rgba(220,38,38,.07);
  --warning: #d97706;
  --warning-dim: rgba(217,119,6,.07);
  --success: #059669;
  --success-dim: rgba(5,150,105,.07);
  --conflict-bg: #fef2f2;
  --conflict-text: #dc2626;
  --bay-shift-bg: #fffbeb;
  --bay-shift-text: #b45309;
  --edit-old: #9ca3af;
  --edit-new: #1a56db;
  --sidebar-width: 256px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 36px rgba(0,0,0,.12);
  --shadow-focus: 0 0 0 3px rgba(26,86,219,.18);
  --font-body: 'IBM Plex Sans Thai', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --ease-out: cubic-bezier(.22,1,.36,1);
  --ease-spring: cubic-bezier(.34,1.56,.64,1);
}

/* ==================== RESET ==================== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:14px;-webkit-text-size-adjust:100%}
body{font-family:var(--font-body);color:var(--text-primary);background:var(--background);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none}
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:10px}

/* ==================== ANIMATIONS ==================== */
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
@keyframes slideUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
@keyframes slideDown{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
@keyframes spin{to{transform:rotate(360deg)}}

/* ==================== LOGIN ==================== */
.login-page{min-height:100vh;align-items:center;justify-content:center;background:var(--background);position:relative;overflow:hidden}
.login-deco{position:absolute;pointer-events:none;border-radius:50%}
.login-deco:first-child{top:-20%;right:-15%;width:500px;height:500px;background:radial-gradient(circle,var(--primary-dim),transparent 70%)}
.login-deco:nth-child(2){bottom:-15%;left:-10%;width:350px;height:350px;background:radial-gradient(circle,rgba(5,150,105,.05),transparent 70%)}
.login-card{position:relative;z-index:1;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:40px 36px;width:100%;max-width:400px;box-shadow:var(--shadow-lg);animation:slideUp .5s var(--ease-out) both}
.login-logo{text-align:center;margin-bottom:28px}
.logo-icon{width:56px;height:56px;background:var(--primary);border-radius:14px;display:inline-flex;align-items:center;justify-content:center;font-size:1.8rem;margin-bottom:12px;color:#fff;box-shadow:0 4px 16px rgba(26,86,219,.25)}
.login-logo h1{font-size:1.4rem;font-weight:700;color:var(--text-primary);letter-spacing:-.02em}
.login-logo p{color:var(--text-secondary);font-size:.85rem;margin-top:4px}
.login-error{color:var(--danger);font-size:.82rem;margin-top:12px;min-height:1.2em;text-align:center}
.btn-login{display:block;width:100%;padding:12px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius-sm);font-family:var(--font-body);font-size:.92rem;font-weight:600;cursor:pointer;transition:background .15s;margin-top:8px}
.btn-login:hover{background:var(--primary-light)}
.btn-login:disabled{opacity:.6;cursor:wait}

/* ==================== APP LAYOUT ==================== */
.app-wrapper{display:flex;min-height:100vh}
.main-area{flex:1;margin-left:var(--sidebar-width);display:flex;flex-direction:column;min-height:100vh}
.topbar{display:none;position:sticky;top:0;z-index:50;background:var(--surface);border-bottom:1px solid var(--border);padding:10px 14px;font-weight:600;font-size:.92rem}
.hamburger{background:none;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:1.2rem;cursor:pointer;padding:4px 10px;margin-right:10px}
#app-content{flex:1;padding:22px 26px}

/* ==================== SIDEBAR ==================== */
.sidebar{position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-width);background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;z-index:100;transition:transform .3s var(--ease-out)}
.sidebar-header{padding:16px 18px;border-bottom:1px solid var(--border-light)}
.sidebar-brand{display:flex;align-items:center;gap:10px}
.brand-icon{width:34px;height:34px;background:var(--primary);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:#fff;flex-shrink:0}
.brand-text{font-size:.95rem;font-weight:700;color:var(--primary);line-height:1.2;letter-spacing:-.02em}
.brand-sub{font-size:.68rem;font-weight:400;color:var(--text-muted)}
.sidebar-nav{flex:1;overflow-y:auto;padding:10px 8px}
.nav-link{display:flex;align-items:center;gap:11px;padding:9px 13px;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:.88rem;font-weight:400;cursor:pointer;border:none;background:none;width:100%;text-align:left;transition:all .15s;position:relative}
.nav-link:hover{background:var(--surface-hover);color:var(--text-primary)}
.nav-link.active{background:var(--primary-dim);color:var(--primary);font-weight:600}
.nav-link.active::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:18px;background:var(--primary);border-radius:0 3px 3px 0}
.nav-icon{font-size:1.1rem;width:22px;text-align:center;flex-shrink:0}
.nav-badge{margin-left:auto;background:var(--danger);color:#fff;font-size:.65rem;font-weight:600;padding:1px 6px;border-radius:99px;min-width:18px;text-align:center}
.sidebar-footer{padding:12px 14px;border-top:1px solid var(--border-light)}
.sidebar-user{display:flex;align-items:center;gap:9px}
.user-avatar{width:32px;height:32px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:.82rem;flex-shrink:0}
.user-info{flex:1;min-width:0}
.user-name{font-weight:600;font-size:.84rem;color:var(--text-primary);line-height:1.2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.user-role{font-size:.7rem;color:var(--text-muted)}
.btn-logout{background:none;border:1px solid var(--border);border-radius:var(--radius-sm);padding:4px 8px;cursor:pointer;font-size:.9rem;transition:all .15s}
.btn-logout:hover{background:var(--danger-dim);border-color:var(--danger)}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:90;backdrop-filter:blur(2px)}
.sidebar-overlay.show{display:block}

@media(max-width:768px){
  .topbar{display:flex;align-items:center}
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .main-area{margin-left:0}
  #app-content{padding:14px 12px}
}

/* ==================== BUTTONS ==================== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 18px;border:1px solid transparent;border-radius:var(--radius-sm);font-family:var(--font-body);font-size:.86rem;font-weight:500;cursor:pointer;transition:all .15s;white-space:nowrap}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn-primary:hover{background:var(--primary-light)}
.btn-secondary{background:var(--surface);color:var(--text-secondary);border-color:var(--border)}.btn-secondary:hover{background:var(--surface-hover);color:var(--text-primary)}
.btn-warning{background:var(--warning);color:#fff}
.btn-danger{background:var(--danger);color:#fff}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}.btn-outline:hover{background:var(--primary-dim)}
.btn-icon{width:34px;height:34px;padding:0;font-size:.95rem;border-radius:var(--radius-sm);background:var(--surface);border:1px solid var(--border);color:var(--text-secondary)}.btn-icon:hover{background:var(--surface-hover);color:var(--text-primary)}
.btn-sm{padding:5px 12px;font-size:.78rem}

/* ==================== FORMS ==================== */
.form-group{margin-bottom:14px}
.form-group label{display:block;font-size:.8rem;font-weight:500;color:var(--text-secondary);margin-bottom:4px}
.form-input{width:100%;padding:10px 13px;border:1px solid var(--border);border-radius:var(--radius-sm);font-family:var(--font-body);font-size:.9rem;color:var(--text-primary);background:var(--surface);transition:border-color .15s,box-shadow .15s;outline:none}
.form-input:focus{border-color:var(--primary);box-shadow:var(--shadow-focus)}
.form-input::placeholder{color:var(--text-muted)}
.form-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:4px 20px}
select.form-input{cursor:pointer}
textarea.form-input{resize:vertical;min-height:60px}

/* ==================== CARDS ==================== */
.settings-card{background:var(--surface);border:1px solid var(--border-light);border-radius:var(--radius-md);padding:22px;margin-bottom:18px;box-shadow:var(--shadow-sm)}
.settings-card h3{font-size:1rem;font-weight:600;margin-bottom:16px}
.admin-links{display:flex;flex-wrap:wrap;gap:8px}
.page-title{font-size:1.3rem;font-weight:700;margin-bottom:20px;letter-spacing:-.02em}

/* ==================== LOADING ==================== */
.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:80px 20px;color:var(--text-muted);gap:12px}
.loading-spinner{width:30px;height:30px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}
.error-container{text-align:center;padding:80px 20px;color:var(--text-secondary)}
.error-container h3{margin-bottom:8px;color:var(--text-primary)}

/* ==================== TOAST ==================== */
.toast-container{position:fixed;top:14px;right:14px;z-index:9999;display:flex;flex-direction:column;gap:7px;pointer-events:none}
.toast{display:flex;align-items:center;gap:9px;padding:11px 14px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:var(--shadow-md);font-size:.85rem;pointer-events:auto;transform:translateX(110%);transition:transform .3s var(--ease-out),opacity .3s;opacity:0;max-width:360px}
.toast-show{transform:translateX(0);opacity:1}
.toast-success{border-left:3px solid var(--success)}.toast-error{border-left:3px solid var(--danger)}.toast-warning{border-left:3px solid var(--warning)}.toast-info{border-left:3px solid var(--primary)}
.toast-icon{font-size:1rem;flex-shrink:0}
.toast-success .toast-icon{color:var(--success)}.toast-error .toast-icon{color:var(--danger)}.toast-warning .toast-icon{color:var(--warning)}.toast-info .toast-icon{color:var(--primary)}
.toast-message{flex:1}.toast-close{background:none;border:none;font-size:1.2rem;color:var(--text-muted);cursor:pointer;padding:0 2px;line-height:1}

/* ==================== MODAL ==================== */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:5000;display:flex;align-items:center;justify-content:center;padding:20px;opacity:0;backdrop-filter:blur(3px);transition:opacity .2s}
.modal-overlay.modal-open{opacity:1}.modal-overlay.modal-closing{opacity:0}
.modal{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);width:100%;max-width:440px;max-height:80vh;overflow-y:auto;transform:scale(.95);transition:transform .25s var(--ease-spring)}
.modal-open .modal{transform:scale(1)}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px 12px;border-bottom:1px solid var(--border-light)}
.modal-header h3{font-size:1rem;font-weight:600}
.modal-close-btn{background:none;border:none;font-size:1.4rem;color:var(--text-muted);cursor:pointer;line-height:1;padding:4px}
.modal-body{padding:16px 20px}.modal-body p{color:var(--text-secondary);font-size:.88rem;line-height:1.7}
.modal-buttons{display:flex;gap:8px;justify-content:flex-end;padding:12px 20px 16px}

/* ==================== AUTOCOMPLETE ==================== */
.autocomplete-wrapper{position:relative;width:100%}
.autocomplete-input{width:100%;padding:5px 8px;border:2px solid var(--primary);border-radius:var(--radius-sm);font-family:var(--font-body);font-size:.82rem;outline:none;background:#fff}
.autocomplete-dropdown{display:none;position:absolute;top:100%;left:0;right:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:var(--shadow-md);max-height:180px;overflow-y:auto;z-index:500}
.autocomplete-item{padding:7px 11px;cursor:pointer;font-size:.82rem;transition:background .1s}
.autocomplete-item:hover,.autocomplete-item.active{background:var(--primary-dim);color:var(--primary)}
.autocomplete-empty{padding:12px;color:var(--text-muted);font-size:.8rem;text-align:center}
.ac-sub{display:block;font-size:.7rem;color:var(--text-muted)}

/* ==================== SETTINGS / THEME ==================== */
.settings-page{max-width:720px;animation:fadeIn .3s var(--ease-out)}
.theme-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px}
.theme-card{border:2px solid var(--border);border-radius:var(--radius-md);padding:8px;cursor:pointer;transition:all .15s;text-align:center}
.theme-card:hover{border-color:var(--primary-light);transform:translateY(-1px)}
.theme-card.active{border-color:var(--primary);box-shadow:var(--shadow-focus)}
.theme-preview{width:100%;height:50px;border-radius:var(--radius-sm);border:1px solid;position:relative;overflow:hidden;margin-bottom:6px}
.tp-bar{position:absolute;top:0;left:0;right:0;height:12px}
.tp-dot{position:absolute;bottom:6px;right:6px;width:10px;height:10px;border-radius:50%}
.tp-text{position:absolute;bottom:6px;left:8px;font-size:.9rem;font-weight:700}
.theme-name{font-size:.74rem;font-weight:500;color:var(--text-secondary)}