/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #ffffff;
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Header */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 20px 30px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.profile {
    animation: fadeIn 0.6s ease-in;
}

.avatar {
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.2);
    border: 4px solid rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    backdrop-filter: blur(10px);
}

.name {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.phone {
    font-size: 18px;
    margin-bottom: 20px;
    opacity: 0.95;
}

.contact-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 15px;
}

.btn-zalo {
    background: rgba(255, 255, 255, 0.95);
    color: #0068FF;
}

.btn-phone {
    background: rgba(255, 255, 255, 0.95);
    color: #10b981;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Main Content */
.main {
    flex: 1;
    padding: 40px 20px;
    background: #ffffff;
}

.section {
    margin-bottom: 40px;
    animation: fadeIn 0.8s ease-in;
}

.section-title {
    font-size: 20px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 20px;
    text-align: center;
    letter-spacing: 0.5px;
}

/* Bank Cards */
.bank-card {
    background: white;
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid #f0f0f0;
    animation: slideUp 0.6s ease-out;
}

.bank-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    transform: translateY(-4px);
}

.bank-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.bank-logo {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f9fafb;
}

.bank-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.bank-name {
    font-size: 20px;
    font-weight: 700;
    color: #1f2937;
}

.bank-info {
    background: #f9fafb;
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 16px;
}

.account-number {
    font-size: 22px;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 6px;
    letter-spacing: 1px;
}

.account-name {
    font-size: 14px;
    color: #6b7280;
    font-weight: 500;
}

.btn-copy {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 12px 24px;
    border-radius: 10px;
    border: none;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
}

.btn-copy:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-copy:active {
    transform: scale(0.98);
}

.qr-code {
    text-align: center;
    padding: 16px;
    background: #f9fafb;
    border-radius: 12px;
}

.qr-code img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

/* Instructions */
.instructions {
    background: #f9fafb;
    border-radius: 12px;
    padding: 24px;
    border-left: 4px solid #667eea;
}

.instructions ul {
    list-style: none;
}

.instructions li {
    padding: 12px 0;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 15px;
    line-height: 1.6;
}

.instructions li i {
    color: #10b981;
    font-size: 18px;
    margin-top: 2px;
}

/* Footer */
.footer {
    background: #f9fafb;
    padding: 24px 20px;
    text-align: center;
    border-top: 1px solid #e5e7eb;
}

.footer p {
    color: #6b7280;
    font-size: 14px;
}

.footer a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: #764ba2;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    padding: 16px 24px;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    z-index: 1000;
    opacity: 0;
    transition: all 0.4s ease;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast i {
    font-size: 20px;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 640px) {
    .header {
        padding: 30px 15px 25px;
    }

    .avatar {
        width: 80px;
        height: 80px;
        font-size: 40px;
    }

    .name {
        font-size: 24px;
    }

    .phone {
        font-size: 16px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }

    .main {
        padding: 30px 15px;
    }

    .section-title {
        font-size: 18px;
    }

    .bank-card {
        padding: 20px;
    }

    .account-number {
        font-size: 18px;
    }

    .bank-name {
        font-size: 18px;
    }

    .bank-logo {
        width: 40px;
        height: 40px;
    }

}

@media (max-width: 400px) {
    .contact-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}