/* DongBeDe Design System */
:root {
    --primary: #7C3AED; --primary-light: #A78BFA; --primary-dark: #5B21B6; --primary-bg: #F5F3FF;
    --secondary: #06B6D4; --success: #10B981; --success-bg: #ECFDF5; --warning: #F59E0B; --warning-bg: #FFFBEB;
    --danger: #EF4444; --danger-bg: #FEF2F2; --info: #3B82F6; --info-bg: #EFF6FF;
    --bg: #FFFFFF; --bg-alt: #F9FAFB; --surface: #F3F4F6; --surface-alt: #E5E7EB;
    --text: #111827; --text-secondary: #4B5563; --text-muted: #9CA3AF; --text-inverse: #FFFFFF;
    --border: #E5E7EB; --border-light: #F3F4F6;
    --radius-sm: 8px; --radius: 12px; --radius-lg: 16px; --radius-xl: 24px; --radius-full: 9999px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05); --shadow: 0 1px 3px rgba(0,0,0,0.1),0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07),0 2px 4px rgba(0,0,0,0.06); --shadow-lg: 0 10px 15px rgba(0,0,0,0.1),0 4px 6px rgba(0,0,0,0.05);
    --font-base: 'Peyda',Tahoma,'Segoe UI',Arial,sans-serif;
}
.dark {
    --bg: #0F172A; --bg-alt: #1E293B; --surface: #1E293B; --surface-alt: #334155;
    --text: #F1F5F9; --text-secondary: #CBD5E1; --text-muted: #64748B;
    --primary-bg: #2E1065; --success-bg: #064E3B; --warning-bg: #78350F; --danger-bg: #7F1D1D; --info-bg: #1E3A5F;
    --border: #334155; --border-light: #1E293B;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3); --shadow: 0 1px 3px rgba(0,0,0,0.4);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.4); --shadow-lg: 0 10px 15px rgba(0,0,0,0.5);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-tap-highlight-color:transparent}
body{font-family:var(--font-base);background:var(--bg);color:var(--text);line-height:1.75;-webkit-font-smoothing:antialiased;min-height:100vh}
.font-peyda{font-family:var(--font-base)}
a{color:var(--primary);text-decoration:none;transition:color .15s}a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto}button{cursor:pointer;font-family:inherit}input,textarea,select{font-family:inherit;font-size:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 16px}.container-sm{max-width:640px;margin:0 auto;padding:0 16px}
.flex{display:flex}.flex-col{flex-direction:column}.flex-wrap{flex-wrap:wrap}.items-center{align-items:center}.items-start{align-items:flex-start}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.justify-end{justify-content:flex-end}
.gap-1{gap:4px}.gap-2{gap:8px}.gap-3{gap:12px}.gap-4{gap:16px}.gap-6{gap:24px}.gap-8{gap:32px}
.grid{display:grid}.grid-cols-1{grid-template-columns:repeat(1,1fr)}.grid-cols-2{grid-template-columns:repeat(2,1fr)}.grid-cols-3{grid-template-columns:repeat(3,1fr)}.grid-cols-4{grid-template-columns:repeat(4,1fr)}
.hidden{display:none}.block{display:block}.inline-block{display:inline-block}.text-center{text-align:center}.text-right{text-align:right}.text-left{text-align:left}
.text-xs{font-size:.75rem}.text-sm{font-size:.875rem}.text-base{font-size:1rem}.text-lg{font-size:1.125rem}.text-xl{font-size:1.25rem}.text-2xl{font-size:1.5rem}.text-3xl{font-size:1.875rem}.text-4xl{font-size:2.25rem}
.font-normal{font-weight:400}.font-medium{font-weight:500}.font-semibold{font-weight:600}.font-bold{font-weight:700}.font-extrabold{font-weight:800}
.text-primary{color:var(--primary)}.text-secondary{color:var(--text-secondary)}.text-muted{color:var(--text-muted)}.text-success{color:var(--success)}.text-danger{color:var(--danger)}.text-warning{color:var(--warning)}
.bg-primary{background:var(--primary)}.bg-surface{background:var(--surface)}.bg-white{background:var(--bg)}
.mt-1{margin-top:4px}.mt-2{margin-top:8px}.mt-3{margin-top:12px}.mt-4{margin-top:16px}.mt-6{margin-top:24px}.mt-8{margin-top:32px}
.mb-1{margin-bottom:4px}.mb-2{margin-bottom:8px}.mb-3{margin-bottom:12px}.mb-4{margin-bottom:16px}.mb-6{margin-bottom:24px}.mb-8{margin-bottom:32px}
.p-2{padding:8px}.p-3{padding:12px}.p-4{padding:16px}.p-6{padding:24px}.p-8{padding:32px}
.w-full{width:100%}.h-full{height:100%}.relative{position:relative}.absolute{position:absolute}.fixed{position:fixed}.sticky{position:sticky}
.rounded-sm{border-radius:var(--radius-sm)}.rounded{border-radius:var(--radius)}.rounded-lg{border-radius:var(--radius-lg)}.rounded-xl{border-radius:var(--radius-xl)}.rounded-full{border-radius:var(--radius-full)}
.shadow-sm{box-shadow:var(--shadow-sm)}.shadow{box-shadow:var(--shadow)}.shadow-md{box-shadow:var(--shadow-md)}.shadow-lg{box-shadow:var(--shadow-lg)}
.border{border:1px solid var(--border)}.border-b{border-bottom:1px solid var(--border)}.border-t{border-top:1px solid var(--border)}
.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hide-mobile{display:block}@media(max-width:768px){.hide-mobile{display:none!important}}
.ltr{direction:ltr}.rtl{direction:rtl}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;font-size:.9375rem;font-weight:500;border:none;border-radius:var(--radius);cursor:pointer;transition:all .15s;text-decoration:none;white-space:nowrap;line-height:1.5}
.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}
.btn-primary{background:var(--primary);color:var(--text-inverse);box-shadow:0 2px 8px rgba(124,58,237,.3)}.btn-primary:hover{background:var(--primary-dark);color:var(--text-inverse)}
.btn-secondary{background:var(--surface);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:var(--surface-alt)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}.btn-outline:hover{background:var(--primary-bg)}
.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover{background:var(--surface);color:var(--text)}
.btn-danger{background:var(--danger);color:var(--text-inverse)}.btn-danger:hover{background:#DC2626}
.btn-success{background:var(--success);color:#fff}.btn-success:hover{background:#059669}
.btn-sm{padding:6px 12px;font-size:.8125rem;border-radius:var(--radius-sm)}.btn-lg{padding:14px 28px;font-size:1.0625rem;border-radius:var(--radius-lg)}
.btn-icon{width:40px;height:40px;padding:0;border-radius:var(--radius-full)}.btn-icon.btn-sm{width:32px;height:32px}

/* Forms */
.form-group{margin-bottom:16px}.form-label{display:block;font-size:.875rem;font-weight:500;color:var(--text);margin-bottom:6px}
.form-input,.form-textarea,.form-select{width:100%;padding:10px 14px;font-size:.9375rem;background:var(--bg);color:var(--text);border:1.5px solid var(--border);border-radius:var(--radius);transition:border-color .15s,box-shadow .15s;outline:none}
.form-input:focus,.form-textarea:focus,.form-select:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-bg)}
.form-input::placeholder,.form-textarea::placeholder{color:var(--text-muted)}.form-input.error{border-color:var(--danger)}
.form-error{font-size:.8125rem;color:var(--danger);margin-top:4px}.form-textarea{min-height:100px;resize:vertical}

/* Cards */
.card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;transition:box-shadow .15s}.card:hover{box-shadow:var(--shadow-md)}
.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border-light)}

/* Badge */
.badge{display:inline-flex;align-items:center;padding:4px 10px;font-size:.75rem;font-weight:500;border-radius:var(--radius-full)}
.badge-primary{background:var(--primary-bg);color:var(--primary)}.badge-success{background:var(--success-bg);color:var(--success)}
.badge-danger{background:var(--danger-bg);color:var(--danger)}.badge-warning{background:var(--warning-bg);color:var(--warning)}.badge-info{background:var(--info-bg);color:var(--info)}

/* Avatar */
.avatar{width:40px;height:40px;border-radius:var(--radius-full);background:var(--primary-bg);color:var(--primary);display:inline-flex;align-items:center;justify-content:center;font-weight:600;font-size:.875rem;overflow:hidden}
.avatar img{width:100%;height:100%;object-fit:cover}.avatar-sm{width:32px;height:32px;font-size:.75rem}.avatar-lg{width:56px;height:56px;font-size:1.125rem}.avatar-xl{width:80px;height:80px;font-size:1.5rem}

/* Tabs */
.tabs{display:flex;border-bottom:2px solid var(--border)}.tab{padding:12px 20px;font-size:.9375rem;font-weight:500;color:var(--text-secondary);border-bottom:2px solid transparent;margin-bottom:-2px;cursor:pointer;transition:all .15s;background:none;border-top:none;border-left:none;border-right:none}
.tab:hover{color:var(--text)}.tab.active{color:var(--primary);border-bottom-color:var(--primary)}

/* Flash */
.flash-message{display:flex;align-items:center;gap:10px;padding:12px 16px;border-radius:var(--radius);margin-bottom:12px;font-size:.875rem;animation:slideDown .3s ease}
@keyframes slideDown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
.flash-success{background:var(--success-bg);color:#065F46;border:1px solid #A7F3D0}.flash-error{background:var(--danger-bg);color:#991B1B;border:1px solid #FECACA}.flash-info{background:var(--info-bg);color:#1E40AF;border:1px solid #BFDBFE}
.flash-container{position:fixed;top:16px;left:50%;transform:translateX(-50%);z-index:1000;max-width:500px;width:90%}
.dark .flash-success{background:#064E3B;color:#6EE7B7;border-color:#065F46}.dark .flash-error{background:#7F1D1D;color:#FCA5A5;border-color:#991B1B}.dark .flash-info{background:#1E3A5F;color:#93C5FD;border-color:#1E40AF}

/* Navbar */
.navbar{background:var(--bg);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;backdrop-filter:blur(8px)}
.navbar-inner{display:flex;align-items:center;justify-content:space-between;height:64px;padding:0 16px;max-width:1200px;margin:0 auto}
.navbar-brand{font-size:1.25rem;font-weight:700;color:var(--text);display:flex;align-items:center;gap:8px}.navbar-brand:hover{color:var(--text)}
.navbar-links{display:flex;align-items:center;gap:8px}.navbar-link{padding:8px 14px;font-size:.9375rem;font-weight:500;color:var(--text-secondary);border-radius:var(--radius);transition:all .15s}
.navbar-link:hover{background:var(--surface);color:var(--text)}

/* Bottom nav */
.bottom-nav{display:none;position:fixed;bottom:0;left:0;right:0;background:var(--bg);border-top:1px solid var(--border);padding:8px 16px;padding-bottom:max(8px,env(safe-area-inset-bottom));z-index:100}
.bottom-nav-inner{display:flex;justify-content:space-around;align-items:center}
.bottom-nav-item{display:flex;flex-direction:column;align-items:center;gap:2px;padding:4px 12px;color:var(--text-muted);font-size:.6875rem;font-weight:500;background:none;border:none;cursor:pointer;transition:color .15s;text-decoration:none}.bottom-nav-item.active{color:var(--primary)}
.bottom-nav-item svg{width:24px;height:24px}
.bottom-nav-fab{width:48px;height:48px;border-radius:var(--radius-full);background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;border:none;box-shadow:0 4px 12px rgba(124,58,237,.4);margin-top:-20px}
@media(max-width:768px){.bottom-nav{display:block}.app-layout{padding-bottom:80px}}

/* App layout */
.app-layout{display:flex;min-height:100vh}
.app-sidebar{width:240px;background:var(--bg-alt);border-left:1px solid var(--border);padding:20px 0;position:fixed;top:64px;bottom:0;right:0;overflow-y:auto}
.app-main{flex:1;margin-right:240px;padding:24px;max-width:calc(100% - 240px)}
.sidebar-link{display:flex;align-items:center;gap:10px;padding:10px 14px;font-size:.9375rem;font-weight:500;color:var(--text-secondary);border-radius:var(--radius);transition:all .15s;text-decoration:none;margin:0 8px}
.sidebar-link:hover{background:var(--surface);color:var(--text)}.sidebar-link.active{background:var(--primary-bg);color:var(--primary)}
.sidebar-link svg{width:20px;height:20px;flex-shrink:0}
@media(max-width:768px){.app-sidebar{display:none}.app-main{margin-right:0;max-width:100%;padding:16px}}

/* Page header */
.page-header{margin-bottom:24px}.page-title{font-size:1.5rem;font-weight:700;color:var(--text);margin-bottom:4px}.page-description{font-size:.9375rem;color:var(--text-secondary)}

/* Responsive grid */
@media(min-width:640px){.sm\:grid-cols-2{grid-template-columns:repeat(2,1fr)}}@media(min-width:768px){.md\:grid-cols-2{grid-template-columns:repeat(2,1fr)}.md\:grid-cols-3{grid-template-columns:repeat(3,1fr)}}@media(min-width:1024px){.lg\:grid-cols-3{grid-template-columns:repeat(3,1fr)}.lg\:grid-cols-4{grid-template-columns:repeat(4,1fr)}}

/* Stats */
.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:24px}@media(min-width:768px){.stats-grid{grid-template-columns:repeat(4,1fr)}}
.stat-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;text-align:center}
.stat-label{font-size:.8125rem;color:var(--text-secondary);margin-bottom:4px}.stat-value{font-size:1.5rem;font-weight:700;color:var(--text)}

/* Expense */
.expense-item{display:flex;align-items:center;gap:14px;padding:14px 16px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:8px;transition:box-shadow .15s}.expense-item:hover{box-shadow:var(--shadow-sm)}
.expense-icon{width:44px;height:44px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:1.25rem;flex-shrink:0}
.expense-info{flex:1;min-width:0}.expense-title{font-weight:500;color:var(--text);margin-bottom:2px}.expense-meta{font-size:.8125rem;color:var(--text-secondary)}.expense-amount{font-weight:600;color:var(--text);white-space:nowrap}

/* Member */
.member-item{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:8px}

/* Balance */
.balance-positive{color:var(--success)}.balance-negative{color:var(--danger)}.balance-zero{color:var(--text-muted)}
.balance-card{padding:16px 20px;border-radius:var(--radius-lg);border:2px solid transparent}
.balance-card.creditor{background:var(--success-bg);border-color:#A7F3D0}.balance-card.debtor{background:var(--danger-bg);border-color:#FECACA}
.dark .balance-card.creditor{border-color:#065F46}.dark .balance-card.debtor{border-color:#991B1B}

/* Settlement */
.settlement-row{display:flex;align-items:center;gap:12px;padding:14px 16px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:8px}
.settlement-arrow{font-size:1.25rem;color:var(--primary);flex-shrink:0}

/* Empty */
.empty-state{text-align:center;padding:48px 20px}.empty-state-icon{font-size:3rem;margin-bottom:12px;display:block}
.empty-state-title{font-size:1.125rem;font-weight:600;color:var(--text);margin-bottom:8px}.empty-state-text{font-size:.9375rem;color:var(--text-secondary);margin-bottom:16px}

/* Modal */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:200;display:flex;align-items:center;justify-content:center;padding:16px;animation:fadeIn .2s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}.modal{background:var(--bg);border-radius:var(--radius-xl);padding:24px;width:100%;max-width:500px;max-height:90vh;overflow-y:auto;animation:scaleIn .2s ease}
@keyframes scaleIn{from{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.modal-title{font-size:1.125rem;font-weight:600}

/* Pagination */
.pagination{display:flex;align-items:center;gap:4px;justify-content:center;margin-top:24px}.pagination-btn{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:var(--radius);font-size:.875rem;color:var(--text-secondary);background:var(--bg);cursor:pointer;transition:all .15s}.pagination-btn:hover{border-color:var(--primary);color:var(--primary)}.pagination-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}

/* Notifications */
.notification-item{display:flex;align-items:flex-start;gap:12px;padding:14px 16px;background:var(--bg);border-radius:var(--radius);margin-bottom:8px}.notification-item.unread{background:var(--primary-bg);border-right:3px solid var(--primary)}.notification-dot{width:8px;height:8px;border-radius:var(--radius-full);background:var(--primary);flex-shrink:0;margin-top:8px}

/* Toggle */
.toggle{position:relative;width:48px;height:28px;background:var(--surface-alt);border-radius:var(--radius-full);cursor:pointer;transition:background .15s;border:none}.toggle::after{content:'';position:absolute;top:3px;right:3px;width:22px;height:22px;background:#fff;border-radius:var(--radius-full);transition:all .15s}.toggle.active{background:var(--primary)}.toggle.active::after{right:23px}

/* Landing */
.hero{padding:80px 16px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;left:-50%;right:-50%;bottom:-50%;background:radial-gradient(circle at 30% 50%,rgba(124,58,237,.06) 0%,transparent 60%);pointer-events:none}
.hero-title{font-size:2.25rem;font-weight:800;line-height:1.4;color:var(--text);margin-bottom:12px;max-width:600px;margin-left:auto;margin-right:auto}@media(min-width:768px){.hero-title{font-size:3rem}}
.hero-title .highlight{color:var(--primary)}.hero-subtitle{font-size:1.125rem;color:var(--text-secondary);max-width:500px;margin:0 auto 32px;line-height:1.8}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.hero-preview{max-width:500px;margin:48px auto 0;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-xl);padding:24px;box-shadow:var(--shadow-lg)}
.features-section{padding:80px 16px;background:var(--bg-alt)}.section-title{font-size:1.75rem;font-weight:700;text-align:center;margin-bottom:8px;color:var(--text)}.section-subtitle{font-size:1rem;text-align:center;color:var(--text-secondary);margin-bottom:48px}
.feature-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-xl);padding:28px;text-align:center;transition:box-shadow .15s}.feature-card:hover{box-shadow:var(--shadow-md)}
.feature-icon{width:56px;height:56px;border-radius:var(--radius-lg);background:var(--primary-bg);display:inline-flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:16px}.feature-title{font-size:1.0625rem;font-weight:600;margin-bottom:8px;color:var(--text)}.feature-text{font-size:.875rem;color:var(--text-secondary);line-height:1.8}

/* Footer */
.footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:40px 16px;text-align:center}.footer-links{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;margin-bottom:16px}.footer-link{font-size:.875rem;color:var(--text-secondary)}.footer-link:hover{color:var(--text)}.footer-text{font-size:.8125rem;color:var(--text-muted)}

/* Auth */
.auth-container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:var(--bg-alt)}.auth-card{background:var(--bg);border-radius:var(--radius-xl);padding:32px;width:100%;max-width:420px;box-shadow:var(--shadow-lg);border:1px solid var(--border)}.auth-header{text-align:center;margin-bottom:28px}.auth-title{font-size:1.375rem;font-weight:700;margin-bottom:6px}.auth-subtitle{font-size:.875rem;color:var(--text-secondary)}

/* Splits */
.split-row{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--border-light)}.split-row:last-child{border-bottom:none}.split-name{flex:1;font-size:.9375rem;font-weight:500}
.split-input{width:140px;padding:8px 12px;border:1.5px solid var(--border);border-radius:var(--radius);font-size:.9375rem;text-align:center;background:var(--bg);color:var(--text)}.split-input:focus{border-color:var(--primary);outline:none}

/* Category */
.category-chips{display:flex;flex-wrap:wrap;gap:8px}.category-chip{display:flex;align-items:center;gap:6px;padding:8px 14px;border-radius:var(--radius-full);background:var(--surface);border:1.5px solid transparent;font-size:.875rem;cursor:pointer;transition:all .15s;color:var(--text-secondary)}.category-chip:hover{border-color:var(--border)}.category-chip.selected{border-color:var(--primary);background:var(--primary-bg);color:var(--primary)}

/* FAQ */
.faq-item{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden}.faq-question{padding:18px 20px;font-size:1rem;font-weight:500;color:var(--text);cursor:pointer;background:none;border:none;width:100%;text-align:right;display:flex;align-items:center;justify-content:space-between}.faq-answer{padding:0 20px 18px;font-size:.9375rem;color:var(--text-secondary);line-height:1.8}

/* Scrollbar */
::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--surface-alt);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
@media print{.navbar,.app-sidebar,.bottom-nav,.btn{display:none!important}.app-main{margin:0;max-width:100%}.card{box-shadow:none;border:1px solid #ddd}}