:root {
    --primary: #4a6cf7;
    --primary-dark: #3a56c5;
    --success: #2ecc71;
    --danger: #ff4757;
    --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    --card-bg: rgba(255, 255, 255, 0.95);
    --text-main: #2d3436;
    --text-sub: #636e72;
}

body {
    margin: 0;
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    background: var(--bg-gradient);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    color: var(--text-main);
}

.container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.card-ui {
    background: var(--card-bg);
    padding: 40px 30px;
    border-radius: 30px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    text-align: center;
    transition: transform 0.3s ease;
}

.hidden { display: none; }

h1 { 
    font-size: 24px; 
    font-weight: 700; 
    margin-bottom: 8px;
    color: var(--primary);
}

p {
    font-size: 15px;
    color: var(--text-sub);
    margin-bottom: 25px;
}

/* PIN 표시 */
.pin-display {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 30px 0;
}

.pin-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #dfe6e9;
    transition: all 0.2s;
}

.pin-dot.filled {
    background: var(--primary);
    transform: scale(1.2);
    box-shadow: 0 0 10px rgba(74, 108, 247, 0.4);
}

/* 키패드 */
.keypad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.key {
    padding: 18px;
    font-size: 20px;
    font-weight: 600;
    border-radius: 18px;
    background: #f1f2f6;
    border: none;
    cursor: pointer;
    transition: all 0.1s;
}

.key:active {
    background: var(--primary);
    color: white;
    transform: scale(0.95);
}

/* ATM 애니메이션 영역 */
.slot {
    width: 200px;
    height: 12px;
    background: #2d3436;
    margin: 40px auto 10px;
    border-radius: 6px;
    position: relative;
    overflow: hidden;
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.5);
}

.slot::after {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, #00d2ff, transparent);
    animation: slotLight 2s linear infinite;
}

@keyframes slotLight {
    0% { left: -100%; }
    100% { left: 100%; }
}

.bank-card {
    width: 160px;
    height: 240px;
    margin: 0 auto;
    border-radius: 15px;
    background: linear-gradient(135deg, #0984e3, #6c5ce7);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    transform: translateY(150px);
    display: flex;
    align-items: flex-start;
    padding: 20px;
    box-sizing: border-box;
}

.bank-card::before {
    content: "PREMIUM";
    color: rgba(255,255,255,0.8);
    font-size: 10px;
    letter-spacing: 2px;
}

/* 메뉴 버튼 */
.menu-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.menu-btn {
    padding: 18px;
    border-radius: 18px;
    background: white;
    border: 1px solid #edf2f7;
    color: var(--text-main);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.02);
    transition: all 0.2s;
}

.menu-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.05);
}

.menu-btn::after {
    content: "→";
    font-weight: 400;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    margin-top: 10px;
}

.btn-primary:hover {
    background: var(--primary-dark);
    color: white;
}

/* 잔액 및 성공 화면 */
.balance-display {
    background: #f8fafc;
    padding: 30px;
    border-radius: 20px;
    margin: 20px 0;
}

.balance-label {
    font-size: 14px;
    color: var(--text-sub);
    margin-bottom: 5px;
}

.balance-val {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
}

.cash-slot {
    width: 180px;
    height: 8px;
    background: #2d3436;
    margin: 30px auto;
    border-radius: 4px;
    position: relative;
}

.cash {
    width: 160px;
    height: 70px;
    background: #55efc4;
    border: 1px solid #00b894;
    border-radius: 4px;
    position: absolute;
    top: 4px;
    left: 10px;
    z-index: -1;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 700;
    color: #006266;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.cash.show {
    opacity: 1;
    transform: translateY(20px);
}

/* 애니메이션 */
@keyframes insertOnce {
    0% { transform: translateY(150px); opacity: 1; }
    40% { transform: translateY(30px); }
    100% { transform: translateY(-100px); opacity: 0; }
}

.insert-animation { animation: insertOnce 2s ease-in-out forwards; }

@keyframes insertFinal {
    0% { transform: translateY(150px); opacity: 1; }
    40% { transform: translateY(30px); }
    100% { transform: translateY(-60px); opacity: 1; }
}

.insert-final { animation: insertFinal 2s ease-in-out forwards; }